Manufacturer and seller images. Configuration examples may include additional equipment.
Image source: Module figure from SunPower Corporation's datasheet for the model family whose printed model list includes the SPR-X21-350-BLK; the maker's image for the family, not a photo of this exact unit. Figure from the manufacturer's document, page 1.No sellers found.
The model number SunPower printed in the Electrical Data header row of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022) ("Electrical Data SPR-X21-350-BLK SPR-X21-335-BLK"). The datasheet prints no separate part number.
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Page 2, Electrical Data header row, column 1 of 2
Documented
Printed in Table 1 of Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025), row "SPR-X21-350-BLK 350 57.3 6.11 68.2 6.50 0.058 -0.236 -0.27 600 II"; the Module Rated Power (W) +5/-0% column reads 350. Electrical parameters are measured at Standard Test Conditions. Revised on 17 October 2026: The fact rested only on an Internet Archive copy, which is not a usable source; Maxeon's own live US installation instructions print the same value, so the fact is re-cited to them (PM, October 17, 2026).
Official installation manual: Maxeon Safety and Installation Instructions (United States), document 544753 Rev J Rev Rev J · Checked · Earlier documentLocation: Table 1 (Electrical characteristics), SPR-X21-350-BLK row, Module Rated Power (W) +5/-0% column
Documented
Printed in the Electrical Data table of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), column 1 of 2 (the header row prints "Electrical Data SPR-X21-350-BLK SPR-X21-335-BLK"); the row prints "Panel Efficiency 21.5% 20.6%". The row carries no footnote or test condition of its own.
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Page 2, Electrical Data, Panel Efficiency, column 1 of 2
Documented
Printed in Table 1 of Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025), row "SPR-X21-350-BLK 350 57.3 6.11 68.2 6.50 0.058 -0.236 -0.27 600 II"; the Voltage at Rated Power Vmpp (V) column reads 57.3. Electrical parameters are measured at Standard Test Conditions. Revised on 17 October 2026: The fact rested only on an Internet Archive copy, which is not a usable source; Maxeon's own live US installation instructions print the same value, so the fact is re-cited to them (PM, October 17, 2026).
Official installation manual: Maxeon Safety and Installation Instructions (United States), document 544753 Rev J Rev Rev J · Checked · Earlier documentLocation: Table 1 (Electrical characteristics), SPR-X21-350-BLK row, Voltage at Rated Power Vmpp (V) column
Documented
Printed in Table 1 of Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025), row "SPR-X21-350-BLK 350 57.3 6.11 68.2 6.50 0.058 -0.236 -0.27 600 II"; the Current at Rated Power, Impp (A) column reads 6.11. Electrical parameters are measured at Standard Test Conditions. Revised on 17 October 2026: The fact rested only on an Internet Archive copy, which is not a usable source; Maxeon's own live US installation instructions print the same value, so the fact is re-cited to them (PM, October 17, 2026).
Official installation manual: Maxeon Safety and Installation Instructions (United States), document 544753 Rev J Rev Rev J · Checked · Earlier documentLocation: Table 1 (Electrical characteristics), SPR-X21-350-BLK row, Current at Rated Power, Impp (A) column
Documented
Printed in Table 1 of Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025), row "SPR-X21-350-BLK 350 57.3 6.11 68.2 6.50 0.058 -0.236 -0.27 600 II"; the Open Circuit Voltage Voc (V) +/-3% column reads 68.2. Electrical parameters are measured at Standard Test Conditions. Revised on 17 October 2026: The fact rested only on an Internet Archive copy, which is not a usable source; Maxeon's own live US installation instructions print the same value, so the fact is re-cited to them (PM, October 17, 2026).
Official installation manual: Maxeon Safety and Installation Instructions (United States), document 544753 Rev J Rev Rev J · Checked · Earlier documentLocation: Table 1 (Electrical characteristics), SPR-X21-350-BLK row, Open Circuit Voltage Voc (V) +/-3% column
Documented
Printed in Table 1 of Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025), row "SPR-X21-350-BLK 350 57.3 6.11 68.2 6.50 0.058 -0.236 -0.27 600 II"; the Short Circuit Current, Isc (A) +/-3% column reads 6.5. Electrical parameters are measured at Standard Test Conditions. Revised on 17 October 2026: The fact rested only on an Internet Archive copy, which is not a usable source; Maxeon's own live US installation instructions print the same value, so the fact is re-cited to them (PM, October 17, 2026).
Official installation manual: Maxeon Safety and Installation Instructions (United States), document 544753 Rev J Rev Rev J · Checked · Earlier documentLocation: Table 1 (Electrical characteristics), SPR-X21-350-BLK row, Short Circuit Current, Isc (A) +/-3% column
Documented
Maxeon's US Safety and Installation Instructions (544753 Rev J) print -0.27 %/°C, which is recorded; the manual is the primary source. SunPower's older US datasheet printed -0.29 %/°C.
Printed in Table 1 of Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025), row "SPR-X21-350-BLK 350 57.3 6.11 68.2 6.50 0.058 -0.236 -0.27 600 II"; the Power Temp. Coeff. %/°C column reads -0.27. Corrected on 17 October 2026: the catalog had published -0.29 %/°C from SunPower's earlier US datasheet, which is no longer published; that value stays listed as an alternative. Revised on 17 October 2026: Maxeon's live US installation instructions print -0.27 %/°C for this exact model; the earlier -0.29 %/°C rested only on an Internet Archive copy (PM, October 17, 2026).
Printed once for every model in the Electrical Data table of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022) as "Power Temp Coef. −0.29% / o C" (the extracted text renders the degree sign as "o"). The same table prints Voltage Temp Coef. and Current Temp Coef. only in mV/°C and mA/°C, so no percentage Voc or Isc coefficient is recorded.
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Table 1 (Electrical characteristics), SPR-X21-350-BLK row, Power Temp. Coeff. %/°C column
Documented
Maxeon's US Safety and Installation Instructions (544753 Rev J) print 600 V, which is recorded; the manual is the primary source. SunPower's older US datasheet printed 1000 V.
Printed in Table 1 of Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025), row "SPR-X21-350-BLK 350 57.3 6.11 68.2 6.50 0.058 -0.236 -0.27 600 II"; the Maximum System Voltage column reads 600 (safety class II). Corrected on 17 October 2026: the catalog had published 1000 V from SunPower's earlier US datasheet, which is no longer published; that value stays listed as an alternative. Revised on 17 October 2026: Maxeon's live US installation instructions print a maximum system voltage of 600 V for this exact model; the earlier 1000 V rested only on an Internet Archive copy (PM, October 17, 2026).
Printed once for every model in the Electrical Data table of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022) as "Max. System Voltage 1000 V UL & 1000 V IEC"; the page 2 footer also prints "1000 V max. system voltage".
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Table 1 (Electrical characteristics), SPR-X21-350-BLK row, Maximum System Voltage column
Documented
1 spec not documented yet: bifacialHelp fill in ›
Printed in Table 1 of Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025), row "SPR-X21-350-BLK 350 57.3 6.11 68.2 6.50 0.058 -0.236 -0.27 600 II"; the Module Rated Power (W) +5/-0% column reads 350. Electrical parameters are measured at Standard Test Conditions. Revised on 17 October 2026: The fact rested only on an Internet Archive copy, which is not a usable source; Maxeon's own live US installation instructions print the same value, so the fact is re-cited to them (PM, October 17, 2026).
Official installation manual: Maxeon Safety and Installation Instructions (United States), document 544753 Rev J Rev Rev J · Checked · Earlier documentLocation: Table 1 (Electrical characteristics), SPR-X21-350-BLK row, Module Rated Power (W) +5/-0% column
Documented
Printed in the Electrical Data table of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), column 1 of 2 (the header row prints "Electrical Data SPR-X21-350-BLK SPR-X21-335-BLK"); the row prints "Panel Efficiency 21.5% 20.6%". The row carries no footnote or test condition of its own.
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Page 2, Electrical Data, Panel Efficiency, column 1 of 2
Documented
Printed in Table 1 of Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025), row "SPR-X21-350-BLK 350 57.3 6.11 68.2 6.50 0.058 -0.236 -0.27 600 II"; the Voltage at Rated Power Vmpp (V) column reads 57.3. Electrical parameters are measured at Standard Test Conditions. Revised on 17 October 2026: The fact rested only on an Internet Archive copy, which is not a usable source; Maxeon's own live US installation instructions print the same value, so the fact is re-cited to them (PM, October 17, 2026).
Official installation manual: Maxeon Safety and Installation Instructions (United States), document 544753 Rev J Rev Rev J · Checked · Earlier documentLocation: Table 1 (Electrical characteristics), SPR-X21-350-BLK row, Voltage at Rated Power Vmpp (V) column
Documented
Printed in Table 1 of Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025), row "SPR-X21-350-BLK 350 57.3 6.11 68.2 6.50 0.058 -0.236 -0.27 600 II"; the Current at Rated Power, Impp (A) column reads 6.11. Electrical parameters are measured at Standard Test Conditions. Revised on 17 October 2026: The fact rested only on an Internet Archive copy, which is not a usable source; Maxeon's own live US installation instructions print the same value, so the fact is re-cited to them (PM, October 17, 2026).
Official installation manual: Maxeon Safety and Installation Instructions (United States), document 544753 Rev J Rev Rev J · Checked · Earlier documentLocation: Table 1 (Electrical characteristics), SPR-X21-350-BLK row, Current at Rated Power, Impp (A) column
Documented
Printed in Table 1 of Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025), row "SPR-X21-350-BLK 350 57.3 6.11 68.2 6.50 0.058 -0.236 -0.27 600 II"; the Open Circuit Voltage Voc (V) +/-3% column reads 68.2. Electrical parameters are measured at Standard Test Conditions. Revised on 17 October 2026: The fact rested only on an Internet Archive copy, which is not a usable source; Maxeon's own live US installation instructions print the same value, so the fact is re-cited to them (PM, October 17, 2026).
Official installation manual: Maxeon Safety and Installation Instructions (United States), document 544753 Rev J Rev Rev J · Checked · Earlier documentLocation: Table 1 (Electrical characteristics), SPR-X21-350-BLK row, Open Circuit Voltage Voc (V) +/-3% column
Documented
Printed in Table 1 of Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025), row "SPR-X21-350-BLK 350 57.3 6.11 68.2 6.50 0.058 -0.236 -0.27 600 II"; the Short Circuit Current, Isc (A) +/-3% column reads 6.5. Electrical parameters are measured at Standard Test Conditions. Revised on 17 October 2026: The fact rested only on an Internet Archive copy, which is not a usable source; Maxeon's own live US installation instructions print the same value, so the fact is re-cited to them (PM, October 17, 2026).
Official installation manual: Maxeon Safety and Installation Instructions (United States), document 544753 Rev J Rev Rev J · Checked · Earlier documentLocation: Table 1 (Electrical characteristics), SPR-X21-350-BLK row, Short Circuit Current, Isc (A) +/-3% column
Documented
Maxeon's US Safety and Installation Instructions (544753 Rev J) print -0.27 %/°C, which is recorded; the manual is the primary source. SunPower's older US datasheet printed -0.29 %/°C.
Printed in Table 1 of Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025), row "SPR-X21-350-BLK 350 57.3 6.11 68.2 6.50 0.058 -0.236 -0.27 600 II"; the Power Temp. Coeff. %/°C column reads -0.27. Corrected on 17 October 2026: the catalog had published -0.29 %/°C from SunPower's earlier US datasheet, which is no longer published; that value stays listed as an alternative. Revised on 17 October 2026: Maxeon's live US installation instructions print -0.27 %/°C for this exact model; the earlier -0.29 %/°C rested only on an Internet Archive copy (PM, October 17, 2026).
Printed once for every model in the Electrical Data table of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022) as "Power Temp Coef. −0.29% / o C" (the extracted text renders the degree sign as "o"). The same table prints Voltage Temp Coef. and Current Temp Coef. only in mV/°C and mA/°C, so no percentage Voc or Isc coefficient is recorded.
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Table 1 (Electrical characteristics), SPR-X21-350-BLK row, Power Temp. Coeff. %/°C column
Documented
Maxeon's US Safety and Installation Instructions (544753 Rev J) print 600 V, which is recorded; the manual is the primary source. SunPower's older US datasheet printed 1000 V.
Printed in Table 1 of Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025), row "SPR-X21-350-BLK 350 57.3 6.11 68.2 6.50 0.058 -0.236 -0.27 600 II"; the Maximum System Voltage column reads 600 (safety class II). Corrected on 17 October 2026: the catalog had published 1000 V from SunPower's earlier US datasheet, which is no longer published; that value stays listed as an alternative. Revised on 17 October 2026: Maxeon's live US installation instructions print a maximum system voltage of 600 V for this exact model; the earlier 1000 V rested only on an Internet Archive copy (PM, October 17, 2026).
Printed once for every model in the Electrical Data table of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022) as "Max. System Voltage 1000 V UL & 1000 V IEC"; the page 2 footer also prints "1000 V max. system voltage".
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Table 1 (Electrical characteristics), SPR-X21-350-BLK row, Maximum System Voltage column
Documented
Printed in the Operating Condition And Mechanical Data block of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), once for every model on the sheet: "Solar Cells 96 Monocrystalline Maxeon Gen III".
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Page 2, Operating Condition And Mechanical Data, Solar Cells
Documented
Printed in the Operating Condition And Mechanical Data block of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), once for every model on the sheet: the panel has a "High-transmission tempered anti-reflective" tempered glass front and a "Class 1 black anodized" frame, so it is recorded as a rigid framed panel.
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Page 2, Operating Condition And Mechanical Data, Tempered Glass and Frame
Documented
SunPower's X-Series X21-350-BLK Residential DC Panel datasheet (527835 Rev C) does not use the word "bifacial" or "monofacial" and prints no front/rear power ratio or bifaciality percentage for SPR-X21-350-BLK; left unknown rather than inferred from construction.
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentNot documented
Printed in the Operating Condition And Mechanical Data block of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), once for every model on the sheet.
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Page 2, Operating Condition And Mechanical Data, Frame
Documented
Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025) lists this model under the platform "MAX3 96c SPR-Xyy-XXX-BLK xxx=327-370" and titles its drawing "Maxeon 3 96-cell Residential Solar Panel SPR-Xyy-XXX-BLK". Revised on 17 October 2026: The fact rested only on an Internet Archive copy, which is not a usable source; Maxeon's own live US installation instructions print the same value, so the fact is re-cited to them (PM, October 17, 2026).
Official installation manual: Maxeon Safety and Installation Instructions (United States), document 544753 Rev J Rev Rev J · Checked · Earlier documentLocation: Scope table and module drawing
Documented
Printed as dimension labels on the frame drawing of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022): "1558 mm [61.3 in]", "1046 mm [41.2 in]" and "46 mm [1.8 in]"; the drawing also labels a 30 mm [1.2 in] frame profile dimension. Length, width and depth are assigned from the drawing's long side, short side and frame depth labels.
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Page 2, frame drawing
Documented
Printed in the Operating Condition And Mechanical Data block of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), once for every model on the sheet: "Weight 41 lbs (18.6 kg)".
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Page 2, Operating Condition And Mechanical Data, Weight
Documented
Printed in the Operating Condition And Mechanical Data block of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), once for every model on the sheet: "Temperature −40° F to +185° F (−40° C to +85° C)".
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Page 2, Operating Condition And Mechanical Data, Temperature
Documented
Printed in the Operating Condition And Mechanical Data block of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), once for every model on the sheet. The sheet has no separate connector row; the drawing prints "Cable Length: 1000 mm +/-10 mm".
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Page 2, Operating Condition And Mechanical Data, Junction Box
Documented
Test (not design) load. Printed in the Operating Condition And Mechanical Data block of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), once for every model on the sheet: "Max. Test Load 9 Wind: 154 psf, 7400 Pa, 754 kg/m² back"; the back figure is the wind test load. The same block prints a design load of 3000 Pa back ("Design Load Wind: 62 psf, 3000 Pa, 305 kg/m² back"), kept as an alternative. Footnote 9 refers to the safety and installation guide.
Design (not test) load; printed in SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022) as "Design Load Wind: 62 psf, 3000 Pa, 305 kg/m² back Snow: 125 psf, 6000 Pa, 611 kg/m² front" (the back figure is the wind design load).
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Page 2, Operating Condition And Mechanical Data, Max. Test Load
Documented
Test (not design) load. Printed in the Operating Condition And Mechanical Data block of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), once for every model on the sheet: "Max. Test Load 9 Wind: 154 psf, 7400 Pa, 754 kg/m² back Snow: 208 psf, 10000 Pa, 1019 kg/m² front"; the front figure is the snow test load. The same block prints a design load of 6000 Pa front ("Design Load Wind: 62 psf, 3000 Pa, 305 kg/m² back Snow: 125 psf, 6000 Pa, 611 kg/m² front"), kept as an alternative. Footnote 9 refers to the safety and installation guide for load ratings and mounting configurations.
Design (not test) load; printed in SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022) as "Design Load Wind: 62 psf, 3000 Pa, 305 kg/m² back Snow: 125 psf, 6000 Pa, 611 kg/m² front" (the front figure is the snow design load).
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Page 2, Operating Condition And Mechanical Data, Max. Test Load
Documented
Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025) prints "The maximum series fuse rating is 15A for X-Series"; the document applies to the platform "MAX3 96c SPR-Xyy-XXX-BLK xxx=327-370", which includes this model. Revised on 17 October 2026: The fact rested only on an Internet Archive copy, which is not a usable source; Maxeon's own live US installation instructions print the same value, so the fact is re-cited to them (PM, October 17, 2026).
Official installation manual: Maxeon Safety and Installation Instructions (United States), document 544753 Rev J Rev Rev J · Checked · Earlier documentLocation: Section 2 (Electrical characteristics), maximum series fuse rating
Documented
Published claims and calculations, not independent test results.
SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "UL1703 (Type 2 Fire Rating)" under Tests And Certifications, Standard Tests, with footnote 8 "Type 2 fire rating per UL1703:2013, Class C fire rating per UL1703:2002". Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. No issuer directory, file number or certificate was read in this pass, so the claim is not issuer-verified. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Manufacturer document
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "UL1703 (Type 2 Fire Rating), IEC 61215, IEC 61730" under Tests And Certifications, Standard Tests. Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. No issuer directory, file number or certificate was read in this pass, so the claim is not issuer-verified. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Manufacturer document
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "UL1703 (Type 2 Fire Rating), IEC 61215, IEC 61730" under Tests And Certifications, Standard Tests. Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. No issuer directory, file number or certificate was read in this pass, so the claim is not issuer-verified. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Manufacturer document
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "Ammonia Test IEC 62716" under Tests And Certifications as "Ammonia Test IEC 62716". Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. No issuer directory, file number or certificate was read in this pass, so the claim is not issuer-verified. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Manufacturer document
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "Desert Test MIL-STD-810G" under Tests And Certifications as "Desert Test MIL-STD-810G". Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. No issuer directory, file number or certificate was read in this pass, so the claim is not issuer-verified. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Manufacturer document
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "Salt Spray Test IEC 61701 (maximum severity)" under Tests And Certifications as "Salt Spray Test IEC 61701 (maximum severity)". Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. No issuer directory, file number or certificate was read in this pass, so the claim is not issuer-verified. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Manufacturer document
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "PID Test 1000 V: IEC 62804, PVEL 600 hr duration" under Tests And Certifications as "PID Test 1000 V: IEC 62804, PVEL 600 hr duration". Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. No issuer directory, file number or certificate was read in this pass, so the claim is not issuer-verified. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Manufacturer document
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Page 2: Electrical Data table; Operating Condition And Mechanical Data; Tests And Certifications; footnotes 7 to 9
Retrieved
Not a live manufacturer document (the original address answered HTTP 404 on September 25, 2026). The document prints "527835 Rev C / LTR_US" and "Publication Date: June 2020" and is published under the SunPower name, with SunPower Corporation as copyright holder. Figures describe the panel as documented in that revision.
Archived copy of a document published by SunPower Corporation. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Archived copy, unaltered, kept as a record of what SunPower Corporation published. Original address: https://web.archive.org/web/20220624222300id_/https://us.sunpower.com/sites/default/files/sp-x21-350blk-335blk-ds-en-ltr-pv4s-527835c.pdf. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: 80df13235fb9181ec66d9af368bb95acfd4b53fa5ef0fd28c6f7bb311b6d4b58
Archived copy captured on 2026-10-17.
Retrieved
Maxeon's current US safety and installation instructions for X-Series, MAX3, MAX6 and MAX7 modules, linked from Maxeon's technical documents page (www.maxeon.com); published December 2025. The file is served from Maxeon's site storage (static1.squarespace.com). Manufacturer claims, not an independent test.
Archived copy of a document published by Maxeon Solar Technologies. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Archived copy, unaltered, kept as a record of what Maxeon Solar Technologies published. Original address: https://www.maxeon.com/s/Safety-Installation-Manual-UL-Certified-product_-544753-Rev-J.pdf. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: 0fd2df568d054c48bdd68099777829cb7a54ef1ff9909ad0c2131f99cd3cf900
Earlier revisions, archived captures and copies published by someone other than the manufacturer. Every one stays reachable.
File maxeon-001-14158-revai.pdf, 13 pages, collected 2026-09-28 for issue #102.
Location: maxeon-001-14158-revai.pdf
Retrieved
Archived copy of the manufacturer's own document as of 2023-05-23, served byte for byte by the Wayback Machine; collected for issue #102 on 2026-09-28 because the live host is blocked or gone.
Archived copy of a document published by SunPower Corporation. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Archived copy, unaltered, kept as a record of what SunPower Corporation published. Original address: https://web.archive.org/web/20220624222300id_/https://us.sunpower.com/sites/default/files/sp-x21-350blk-335blk-ds-en-ltr-pv4s-527835c.pdf. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: 80df13235fb9181ec66d9af368bb95acfd4b53fa5ef0fd28c6f7bb311b6d4b58
Archived copy of a document published by Maxeon Solar Technologies. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Archived copy, unaltered, kept as a record of what Maxeon Solar Technologies published. Original address: https://www.maxeon.com/s/Safety-Installation-Manual-UL-Certified-product_-544753-Rev-J.pdf. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: 0fd2df568d054c48bdd68099777829cb7a54ef1ff9909ad0c2131f99cd3cf900
Page 1 of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022) states "we stand behind our panel with the industry’s best 25-year Combined Power and Product Warranty, including the highest Power Warranty in solar". The datasheet prints no warranty terms, claimant or year-by-year power figure.
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Page 1, Best Reliability, Best Warranty
Documented
Page 1 of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022) states "we stand behind our panel with the industry’s best 25-year Combined Power and Product Warranty, including the highest Power Warranty in solar". The datasheet prints no warranty terms, claimant or year-by-year power figure.
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentLocation: Page 1, Best Reliability, Best Warranty
Documented
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The Evidence score uses the priorities you choose. It counts published documents, such as certificates and warranty terms, and it compares a documented figure with the best documented figure of the same kind. It does not count owner reviews, and it is not a verdict on product quality or on how many people have reviewed it. A low score can mean little is documented, or that a documented figure is below the best of its kind. Undisclosed data scores 0.
Missing for this product: First-year degradation needed.
Each input is scored against the best documented value for a solar panel, and weight per watt against the best in the panel’s own format. A documented value always earns points; an undisclosed one earns 0 and is listed as missing. Certificates and unsupported claims do not add points.
21.5 of 25.5 %, the best documented for a solar panel (printed by the maker): AIKO Comet 3N72 AIKO-A690-MDE72Mw 690W Mono-Glass Module
Printed in the Electrical Data table of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), column 1 of 2 (the header row prints "Electrical Data SPR-X21-350-BLK SPR-X21-335-BLK"); the row prints "Panel Efficiency 21.5% 20.6%". The row carries no footnote or test condition of its own.
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier document25 of 30 years, the best documented for a solar panel (printed by the maker): AIKO Neostar 3S+54 AIKO-A480-MCE54Db 480W Dual-Glass Module
Page 1 of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022) states "we stand behind our panel with the industry’s best 25-year Combined Power and Product Warranty, including the highest Power Warranty in solar". The datasheet prints no warranty terms, claimant or year-by-year power figure.
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier document25 of 30 years, the best documented for a solar panel (printed by the maker): AIKO Neostar 3S+54 AIKO-A460-MCE54Db 460W Dual-Glass Module
Page 1 of SunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022) states "we stand behind our panel with the industry’s best 25-year Combined Power and Product Warranty, including the highest Power Warranty in solar". The datasheet prints no warranty terms, claimant or year-by-year power figure.
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier document0.29 %/°C is the less favorable figure the maker's documents print, and it is scored because they disagree; it never sets or raises the bar. The bar is 0.22 %/°C, the lowest documented for a solar panel, printed by the maker: Jackery SolarSaga 100 Air
Printed in Table 1 of Maxeon's Safety and Installation Instructions (United States), document 544753 Rev J (December 2025), row "SPR-X21-350-BLK 350 57.3 6.11 68.2 6.50 0.058 -0.236 -0.27 600 II"; the Power Temp. Coeff. %/°C column reads -0.27. Corrected on 17 October 2026: the catalog had published -0.29 %/°C from SunPower's earlier US datasheet, which is no longer published; that value stays listed as an alternative. Revised on 17 October 2026: Maxeon's live US installation instructions print -0.27 %/°C for this exact model; the earlier -0.29 %/°C rested only on an Internet Archive copy (PM, October 17, 2026).
The maker's documents disagree; the less favorable printed figure, 0.29 %/°C, is scored. Warning: Maxeon documents print different values
Official installation manual: Maxeon Safety and Installation Instructions (United States), document 544753 Rev J Rev Rev J · Checked · Earlier document0.05314 against 0.04308 kg per W, the lowest documented for a rigid solar panel (calculated from maker figures): EcoFlow 130W RVMax Rigid Solar Panel
18.6 kg / 350 W. Lighter modules per watt carry less roof load.
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentOfficial installation manual: Maxeon Safety and Installation Instructions (United States), document 544753 Rev J Rev Rev J · Checked · Earlier documentNot documented, 0 points: First-year degradation.
Each input is compared with the best documented value among published solar panels, weight per watt within the same panel format · Method version 0.4
How it worksSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "UL1703 (Type 2 Fire Rating)" under Tests And Certifications, Standard Tests, with footnote 8 "Type 2 fire rating per UL1703:2013, Class C fire rating per UL1703:2002". Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Models: SPR-X21-350-BLK
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "UL1703 (Type 2 Fire Rating), IEC 61215, IEC 61730" under Tests And Certifications, Standard Tests. Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Models: SPR-X21-350-BLK
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "UL1703 (Type 2 Fire Rating), IEC 61215, IEC 61730" under Tests And Certifications, Standard Tests. Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Models: SPR-X21-350-BLK
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "Ammonia Test IEC 62716" under Tests And Certifications as "Ammonia Test IEC 62716". Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Models: SPR-X21-350-BLK
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "Desert Test MIL-STD-810G" under Tests And Certifications as "Desert Test MIL-STD-810G". Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Models: SPR-X21-350-BLK
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "Salt Spray Test IEC 61701 (maximum severity)" under Tests And Certifications as "Salt Spray Test IEC 61701 (maximum severity)". Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Models: SPR-X21-350-BLK
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "PID Test 1000 V: IEC 62804, PVEL 600 hr duration" under Tests And Certifications as "PID Test 1000 V: IEC 62804, PVEL 600 hr duration". Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Models: SPR-X21-350-BLK
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentListed on the California Energy Commission PV Module List (data unchanged since October 1, 2026; downloaded October 11, 2026) as Maxeon Solar Technologies Ltd. "SPR-X21-350-BLK": UL 61730, certifying entity not printed on the list, CEC listing date 2023-02-21. The maker's documents claim UL 1703; the CEC list records UL 61730 for this model. Both are shown; neither replaces the other. A state equipment list entry, not the certification body's own record.
Models: SPR-X21-350-BLK
Issuer record: CEC PV Module List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentModel SPR-X21-350-BLK listed on the California Energy Commission PV Module List (data unchanged since October 1, 2026; downloaded October 11, 2026) under Maxeon Solar Technologies Ltd., as "SPR-X21-350-BLK", CEC listing date 2023-02-21. This is an equipment listing, not UL certification or complete-system approval.
Models: SPR-X21-350-BLK
Issuer record: CEC PV Module List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "UL1703 (Type 2 Fire Rating)" under Tests And Certifications, Standard Tests, with footnote 8 "Type 2 fire rating per UL1703:2013, Class C fire rating per UL1703:2002". Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. No issuer directory, file number or certificate was read in this pass, so the claim is not issuer-verified. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Manufacturer document
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "UL1703 (Type 2 Fire Rating), IEC 61215, IEC 61730" under Tests And Certifications, Standard Tests. Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. No issuer directory, file number or certificate was read in this pass, so the claim is not issuer-verified. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Manufacturer document
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "UL1703 (Type 2 Fire Rating), IEC 61215, IEC 61730" under Tests And Certifications, Standard Tests. Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. No issuer directory, file number or certificate was read in this pass, so the claim is not issuer-verified. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Manufacturer document
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "Ammonia Test IEC 62716" under Tests And Certifications as "Ammonia Test IEC 62716". Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. No issuer directory, file number or certificate was read in this pass, so the claim is not issuer-verified. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Manufacturer document
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "Desert Test MIL-STD-810G" under Tests And Certifications as "Desert Test MIL-STD-810G". Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. No issuer directory, file number or certificate was read in this pass, so the claim is not issuer-verified. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Manufacturer document
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "Salt Spray Test IEC 61701 (maximum severity)" under Tests And Certifications as "Salt Spray Test IEC 61701 (maximum severity)". Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. No issuer directory, file number or certificate was read in this pass, so the claim is not issuer-verified. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Manufacturer document
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentSunPower's X-Series datasheet 527835 Rev C / LTR_US (Publication Date: June 2020; Internet Archive copy captured June 24, 2022), which covers SPR-X21-350-BLK, prints "PID Test 1000 V: IEC 62804, PVEL 600 hr duration" under Tests And Certifications as "PID Test 1000 V: IEC 62804, PVEL 600 hr duration". Recorded as the manufacturer printed it; the document is an Internet Archive copy retrieved on September 25, 2026. No issuer directory, file number or certificate was read in this pass, so the claim is not issuer-verified. The same block prints "Available Listings UL, TUV, MCS, FSEC, CEC".
Manufacturer document
Official datasheet: SunPower X-Series: X21-350-BLK SunPower Residential DC Panel datasheet (527835 Rev C) (Internet Archive copy, June 24, 2022) Rev 527835 Rev C / LTR_US · Checked · Earlier documentNo sourced accessories or replacement parts listed yet.
Manufacturer SKU SPR-X21-350-BLK · US market
Product / system scope unresolved. Listed on the California Energy Commission PV Module List (data unchanged since October 1, 2026; downloaded October 11, 2026) as Maxeon Solar Technologies Ltd. "SPR-X21-350-BLK": UL 61730, certifying entity not printed on the list, CEC listing date 2023-02-21. The maker's documents claim UL 1703; the CEC list records UL 61730 for this model. Both are shown; neither replaces the other. A state equipment list entry, not the certification body's own record.
Issuer record: CEC PV Module List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentProduct / system scope unresolved. Model SPR-X21-350-BLK listed on the California Energy Commission PV Module List (data unchanged since October 1, 2026; downloaded October 11, 2026) under Maxeon Solar Technologies Ltd., as "SPR-X21-350-BLK", CEC listing date 2023-02-21. This is an equipment listing, not UL certification or complete-system approval.
Issuer record: CEC PV Module List, official spreadsheet (data unchanged since October 1, 2026; downloaded October 11, 2026) October 1, 2026 · Checked · Earlier documentNo discussions linked yet. Search DIY Solar Forum
No recalls or legal notices on file; this is not a complete recall or court search. All notices · Report a notice
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Prices · price basis. * Calculated; estimates labeled. Value needs confirmation; select it for the reason.
