BigBattery APEX-6.5K: BigBattery APEX-6.5K published by BigBattery on its own product page for SKU INV034; the enclosure in the photograph reads APEX-6.5K.

1 photo · Image from bigbattery.com

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Manufacturer and seller images. Configuration examples may include additional equipment.

Image source: BigBattery APEX-6.5K published by BigBattery on its own product page for SKU INV034; the enclosure in the photograph reads APEX-6.5K. Paid link.

BigBattery APEX-6.5K

Name: BigBattery APEX-6.5K
Brand: BigBattery

By BigBatterySKU INV034

Off-grid inverter

Evidence score6/100Missing details

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Continuous output6.5 kWBattery only6.5 kW Battery voltage48 V Solar inputNot statedMPPT trackers2 AC output120/240 V AC (single-phase / split-phase)Warranty5 years Size37.2 L^*W: 410 × H: 140 × L: 648 mmWeight21.77 kg / 47.99 lb

Key specs

Units

SKU: INV034
Provisional evidenceDistributor product pagePaid link.
Sources
Part number shown by distributor; exact hardware revision should be checked on the label.
Distributor product page: Current Connected product listing Paid link.Checked Sep 8, 2026
Provisional evidence
AC configuration: 120/240V split phase
Distributor product pagePaid link.
Sources
Read from BigBattery's APEX-6.5K product page (SKU INV034) on bigbattery.com, "Inverter Specifications" table titled "APEX-6.5K & APEX 10K INVERTER SPECIFICATIONS", which labels figures per model. Printed: "Rated Output Voltage: 120/240 Vac (single-phase / split-phase)". Re-cited on 25 September 2026 to the manufacturer's own document; previously cited to Current Connected (currentconnected.com), which stays listed as an additional source.
Official product page: BigBattery APEX-6.5K off-grid inverter, SKU INV034, product page (official-source audit capture) Checked Sep 25, 2026 · Earlier documentDistributor product page: Current Connected product listing Paid link.Checked Sep 8, 2026
Location: Inverter Specifications, "Rated Output Voltage" row
Documented
Weight: 21.77 kg47.99 lb converted
Converted: 48 lb x 0.45359237 kg/lb, rounded to 0.01 kg
Official product page
Sources
Converted: 48 lb x 0.45359237 kg/lb, rounded to 0.01 kg
Printed as "Weight: APEX-6.5K: 48 lbs; APEX-10K: 62 lbs" on BigBattery's APEX-6.5K product page, captured on September 25, 2026; the APEX-6.5K entry is recorded.
Official product page: BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture) Checked Sep 24, 2026 · Earlier document
Location: Inverter Specifications, General data, "Weight" row
Converted
MPPT trackers: 2
Official product page
Sources
Printed as "No. of MPPT: 1 + 1" in BigBattery APEX-6.5K off-grid inverter, SKU INV034, product page (official-source audit capture), Inverter Specifications, No. of MPPT. Revised on 1 October 2026: BigBattery prints "No. of MPPT: 1 + 1", two trackers, which matches the stored count; the conditions should drop the re-citation history.
Official product page: BigBattery APEX-6.5K off-grid inverter, SKU INV034, product page (official-source audit capture) Checked Sep 25, 2026 · Earlier document
Location: Inverter Specifications, No. of MPPT
Documented
Peak output: 13,000 VA
Official product page
Sources
Printed as "Max. Output Power: APEX-6.5K: 13,000VA; APEX-10K: 20,000VA" on BigBattery's APEX-6.5K product page, captured on September 25, 2026; the APEX-6.5K entry is recorded. The page prints no duration for this figure, and it is stated in VA, not W.
Official product page: BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture) Checked Sep 24, 2026 · Earlier document
Location: Inverter Specifications, "Max. Output Power" row
Documented
AC voltage: Split-phase mode (default); AC output phase voltage (L-N) 100 VAC−120 VAC, 120 VAC (default); AC output line voltage (L-L) 200 VAC−240 VAC, 240 VAC (default); Single-phase mode; AC output phase voltage (L-N) 100 VAC−120 VAC, 120 VAC (default)
Instruction manual (distributor copy)Paid link.
Sources
Printed as "AC output phase voltage (L-N) 100 VAC−120 VAC, 120 VAC (default)" and "AC output line voltage (L-L) 200 VAC−240 VAC, 240 VAC (default)" and "Single-phase mode Item Description AC output phase voltage (L-N)" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 15). Output voltage. The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 15, 5.1 Wiring mode
Documented
PV conductors (manual): 4mm2/12AWG
Instruction manual (distributor copy)Paid link.
Sources
Printed as "APEX-6.5kW 4mm2/12AWG 18A/18A 2P-25A" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 18). The table notes "The cable size is for reference only" (PDF page 19). The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 18, 5.2 Cable and circuit breaker model, PV input table
Documented
Dimensions: 37.2 L
Calculated: Enclosure volume: W × H × D ÷ 1,000,000
W: 410 × H: 140 × L: 648 mmW: 16.1 × H: 5.51 × L: 25.5 in convertedOfficial product page
Sources
Converted: 25.51 x 16.14 x 5.51 in x 25.4 mm/in, rounded to 0.1 mm
Printed as "APEX-6.5K: 25.51 × 16.14 × 5.51 inches" in BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture), Inverter Specifications, General data, Dimension. Revised on 1 October 2026: The millimeter figures are a correct conversion of BigBattery's printed inches, but the page does not say which figure is length, width or height.
Official product page: BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture) Checked Sep 24, 2026 · Earlier document
Location: Inverter Specifications, General data, Dimension
Calculated
PV disconnect (manual): 2P-25A circuit breaker
Instruction manual (distributor copy)Paid link.
Sources
Printed as "Cable Size Maximum Input Current Circuit Breaker Model" and "APEX-6.5kW 4mm2/12AWG 18A/18A 2P-25A" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 18). The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 18, 5.2 Cable and circuit breaker model, PV input table, "Circuit Breaker Model" column
Documented

1 spec not documented yet: pv input limitHelp fill in ›

All specs26

AC configuration: 120/240V split phase
Distributor product pagePaid link.
Sources
Read from BigBattery's APEX-6.5K product page (SKU INV034) on bigbattery.com, "Inverter Specifications" table titled "APEX-6.5K & APEX 10K INVERTER SPECIFICATIONS", which labels figures per model. Printed: "Rated Output Voltage: 120/240 Vac (single-phase / split-phase)". Re-cited on 25 September 2026 to the manufacturer's own document; previously cited to Current Connected (currentconnected.com), which stays listed as an additional source.
Official product page: BigBattery APEX-6.5K off-grid inverter, SKU INV034, product page (official-source audit capture) Checked Sep 25, 2026 · Earlier documentDistributor product page: Current Connected product listing Paid link.Checked Sep 8, 2026
Location: Inverter Specifications, "Rated Output Voltage" row
Documented
Peak output: 13,000 VA
Official product page
Sources
Printed as "Max. Output Power: APEX-6.5K: 13,000VA; APEX-10K: 20,000VA" on BigBattery's APEX-6.5K product page, captured on September 25, 2026; the APEX-6.5K entry is recorded. The page prints no duration for this figure, and it is stated in VA, not W.
Official product page: BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture) Checked Sep 24, 2026 · Earlier document
Location: Inverter Specifications, "Max. Output Power" row
Documented
AC voltage: Split-phase mode (default); AC output phase voltage (L-N) 100 VAC−120 VAC, 120 VAC (default); AC output line voltage (L-L) 200 VAC−240 VAC, 240 VAC (default); Single-phase mode; AC output phase voltage (L-N) 100 VAC−120 VAC, 120 VAC (default)
Instruction manual (distributor copy)Paid link.
Sources
Printed as "AC output phase voltage (L-N) 100 VAC−120 VAC, 120 VAC (default)" and "AC output line voltage (L-L) 200 VAC−240 VAC, 240 VAC (default)" and "Single-phase mode Item Description AC output phase voltage (L-N)" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 15). Output voltage. The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 15, 5.1 Wiring mode
Documented
Efficiency: 99.9 %
Official product page
Sources
Printed as "Max. Efficiency: 99.9%" on BigBattery's APEX-6.5K product page, captured on September 25, 2026. The page does not say which conversion path or load this figure applies to; it prints MPPT tracking efficiency separately.
Official product page: BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture) Checked Sep 24, 2026 · Earlier document
Location: Inverter Specifications, Efficiency section, "Max. Efficiency" row
Documented
AC output: 120/240 V AC (single-phase / split-phase)
Official product page
Sources
Printed as "Rated Output Voltage: 120/240 Vac (single-phase / split-phase)" on BigBattery's APEX-6.5K product page, captured on September 25, 2026.
Official product page: BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture) Checked Sep 24, 2026 · Earlier document
Location: Inverter Specifications, "Rated Output Voltage" row
Documented
Battery-only output: 6.5 kW
Distributor product pagePaid link.
Sources
Read from BigBattery's APEX-6.5K product page (SKU INV034) on bigbattery.com, "Inverter Specifications" table titled "APEX-6.5K & APEX 10K INVERTER SPECIFICATIONS", which labels figures per model. Printed: "Rated Output Power: APEX-6.5K: 6,500W; APEX-10K: 10,000W"; the APEX-6.5K figure is 6,500W. Re-cited on 25 September 2026 to the manufacturer's own document; previously cited to Current Connected (currentconnected.com), which stays listed as an additional source.
Official product page: BigBattery APEX-6.5K off-grid inverter, SKU INV034, product page (official-source audit capture) Checked Sep 25, 2026 · Earlier documentDistributor product page: Current Connected product listing Paid link.Checked Sep 8, 2026
Location: Inverter Specifications, "Rated Output Power" row
Documented
Battery voltage: 48 V
Distributor product pagePaid link.
Sources
Read from BigBattery's APEX-6.5K product page (SKU INV034) on bigbattery.com, "Inverter Specifications" table titled "APEX-6.5K & APEX 10K INVERTER SPECIFICATIONS", which labels figures per model. Printed: "It works with 48V battery systems". Re-cited on 25 September 2026 to the manufacturer's own document; previously cited to Current Connected (currentconnected.com), which stays listed as an additional source.
Official product page: BigBattery APEX-6.5K off-grid inverter, SKU INV034, product page (official-source audit capture) Checked Sep 25, 2026 · Earlier documentDistributor product page: Current Connected product listing Paid link.Checked Sep 8, 2026
Location: Inverter Specifications and description
Documented
Continuous output: 6.5 kW
Distributor product pagePaid link.
Sources
Read from BigBattery's APEX-6.5K product page (SKU INV034) on bigbattery.com, "Inverter Specifications" table titled "APEX-6.5K & APEX 10K INVERTER SPECIFICATIONS", which labels figures per model. Printed: "Rated Output Power: APEX-6.5K: 6,500W; APEX-10K: 10,000W"; the APEX-6.5K figure is 6,500W. Re-cited on 25 September 2026 to the manufacturer's own document; previously cited to Current Connected (currentconnected.com), which stays listed as an additional source.
Official product page: BigBattery APEX-6.5K off-grid inverter, SKU INV034, product page (official-source audit capture) Checked Sep 25, 2026 · Earlier documentDistributor product page: Current Connected product listing Paid link.Checked Sep 8, 2026
Location: Inverter Specifications, "Rated Output Power" row
Documented

MPPT trackers: 2
Official product page
Sources
Printed as "No. of MPPT: 1 + 1" in BigBattery APEX-6.5K off-grid inverter, SKU INV034, product page (official-source audit capture), Inverter Specifications, No. of MPPT. Revised on 1 October 2026: BigBattery prints "No. of MPPT: 1 + 1", two trackers, which matches the stored count; the conditions should drop the re-citation history.
Official product page: BigBattery APEX-6.5K off-grid inverter, SKU INV034, product page (official-source audit capture) Checked Sep 25, 2026 · Earlier document
Location: Inverter Specifications, No. of MPPT
Documented
PV input limit: Not documented
Official product page
Details
Not printed for this model. BigBattery APEX-6.5K off-grid inverter, SKU INV034, product page (official-source audit capture), Inverter Specifications, "Max. Input Power" row prints "Max. Input Power: APEX-6.5K: 5,000W + 5,000W; APEX-10K: 5,000W + 5,500W". Revised on 1 October 2026: BigBattery prints the maximum PV input per tracker ("5,000W + 5,000W" or "5,000W + 5,500W") but no total; the stored total is our own sum.
Official product page: BigBattery APEX-6.5K off-grid inverter, SKU INV034, product page (official-source audit capture) Checked Sep 25, 2026 · Earlier document
Location: Inverter Specifications, "Max. Input Power" row
Not documented
PV input current / MPPT: 18A/18A
Instruction manual (distributor copy)Paid link.
Sources
Printed as "Cable Size Maximum Input Current Circuit Breaker Model" and "APEX-6.5kW 4mm2/12AWG 18A/18A 2P-25A" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 18). The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 18, 5.2 Cable and circuit breaker model, PV input table, "Maximum Input Current" column
Documented
Maximum PV voltage: 550 V
Distributor product pagePaid link.
Sources
Read from BigBattery's APEX-6.5K product page (SKU INV034) on bigbattery.com, "Inverter Specifications" table titled "APEX-6.5K & APEX 10K INVERTER SPECIFICATIONS", which labels figures per model. Printed: "Max. Open Circuit Voltage: 550Vdc + 550Vdc", per tracker. Re-cited on 25 September 2026 to the manufacturer's own document; previously cited to Current Connected (currentconnected.com), which stays listed as an additional source.
Official product page: BigBattery APEX-6.5K off-grid inverter, SKU INV034, product page (official-source audit capture) Checked Sep 25, 2026 · Earlier documentDistributor product page: Current Connected product listing Paid link.Checked Sep 8, 2026
Location: Inverter Specifications, "Max. Open Circuit Voltage" row
Documented

Weight: 21.77 kg47.99 lb converted
Converted: 48 lb x 0.45359237 kg/lb, rounded to 0.01 kg
Official product page
Sources
Converted: 48 lb x 0.45359237 kg/lb, rounded to 0.01 kg
Printed as "Weight: APEX-6.5K: 48 lbs; APEX-10K: 62 lbs" on BigBattery's APEX-6.5K product page, captured on September 25, 2026; the APEX-6.5K entry is recorded.
Official product page: BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture) Checked Sep 24, 2026 · Earlier document
Location: Inverter Specifications, General data, "Weight" row
Converted
PV conductors (manual): 4mm2/12AWG
Instruction manual (distributor copy)Paid link.
Sources
Printed as "APEX-6.5kW 4mm2/12AWG 18A/18A 2P-25A" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 18). The table notes "The cable size is for reference only" (PDF page 19). The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 18, 5.2 Cable and circuit breaker model, PV input table
Documented
Dimensions: 37.2 L
Calculated: Enclosure volume: W × H × D ÷ 1,000,000
W: 410 × H: 140 × L: 648 mmW: 16.1 × H: 5.51 × L: 25.5 in convertedOfficial product page
Sources
Converted: 25.51 x 16.14 x 5.51 in x 25.4 mm/in, rounded to 0.1 mm
Printed as "APEX-6.5K: 25.51 × 16.14 × 5.51 inches" in BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture), Inverter Specifications, General data, Dimension. Revised on 1 October 2026: The millimeter figures are a correct conversion of BigBattery's printed inches, but the page does not say which figure is length, width or height.
Official product page: BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture) Checked Sep 24, 2026 · Earlier document
Location: Inverter Specifications, General data, Dimension
Calculated
PV disconnect (manual): 2P-25A circuit breaker
Instruction manual (distributor copy)Paid link.
Sources
Printed as "Cable Size Maximum Input Current Circuit Breaker Model" and "APEX-6.5kW 4mm2/12AWG 18A/18A 2P-25A" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 18). The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 18, 5.2 Cable and circuit breaker model, PV input table, "Circuit Breaker Model" column
Documented
Communications: CAN; USB; RS485
Instruction manual (distributor copy)Paid link.
Sources
Printed as "Support CAN, USB, RS485 communication" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 7). The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 7, 3.2 Features
Documented
AC input breaker (manual): Grid input: 3P-40A (split-phase mode); 2P-80A (single-phase mode)
Instruction manual (distributor copy)Paid link.
Sources
Printed as "Split-phase mode 40A(L1/L2 /N) 10mm2/8AWG (L1\L2\N) 3P-40A" and "80A(N) 10mm2/8AWG(L1/L 2) 20mm2/4AWG(N) 2P-80A" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 18). The generator input table prints the same breaker models (3P-40A and 2P-80A). The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 18, 5.2 Cable and circuit breaker model, Grid input table
Documented
Enclosure: IP20
Instruction manual (distributor copy)Paid link.
Sources
Printed as "The APEX series is only for indoor use (protection level: IP20)" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 11). The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 11, 4.1 Installation location
Documented
AC output breaker (manual): AC output: 3P-40A (split-phase mode); 2P-80A (single-phase mode)
Instruction manual (distributor copy)Paid link.
Sources
Printed as "APEX 6.5kW Split-phase mode 40A(L1/L2 /N) 10mm2/8AWG (L1\L2\N) 3P-40A" and "16mm2/6AWG(N) 2P-80A PV input, AC input, and AC output terminals" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 19). The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 19, 5.2 Cable and circuit breaker model, AC output table
Documented
Battery cable size (manual): 35mm2/2AWG
Instruction manual (distributor copy)Paid link.
Sources
Printed as "APEX-6.5kW 35mm2/2AWG 150A 2P-160A" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 18). The cable size is printed as for reference only (PDF page 19). The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 18, 5.2 Cable and circuit breaker model, Battery table
Documented
AC input conductors (manual): Grid input: 10mm2/8AWG (L1, L2, N) in split-phase mode; 10mm2/8AWG (L1/L2) and 20mm2/4AWG (N) in single-phase mode
Instruction manual (distributor copy)Paid link.
Sources
Printed as "Split-phase mode 40A(L1/L2 /N) 10mm2/8AWG (L1\L2\N) 3P-40A" and "80A(N) 10mm2/8AWG(L1/L 2) 20mm2/4AWG(N) 2P-80A" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 18). The generator input table prints 16mm2/6AWG for N in single-phase mode. The cable size is printed as for reference only (PDF page 19). The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 18, 5.2 Cable and circuit breaker model, Grid input table, "Cable Size" column
Documented
Battery fuse or breaker (manual): 2P-160A circuit breaker
Instruction manual (distributor copy)Paid link.
Sources
Printed as "Battery Inverter Model Cable Size Maximum Current Circuit Breaker Model" and "APEX-6.5kW 35mm2/2AWG 150A 2P-160A" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 18). The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 18, 5.2 Cable and circuit breaker model, Battery table, "Circuit Breaker Model" column
Documented
AC output conductors (manual): AC output: 10mm2/8AWG (L1, L2, N) in split-phase mode; 10mm2/8AWG (L1/L2) and 16mm2/6AWG (N) in single-phase mode
Instruction manual (distributor copy)Paid link.
Sources
Printed as "APEX 6.5kW Split-phase mode 40A(L1/L2 /N) 10mm2/8AWG (L1\L2\N) 3P-40A" and "10mm2/8AWG(L1/L 2) 16mm2/6AWG(N) 2P-80A" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 19). The cable size is printed as for reference only. The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 19, 5.2 Cable and circuit breaker model, AC output table, "Cable Size" column
Documented
Operating temperature: -10 to 55 °C14 to 131 °F converted
Instruction manual (distributor copy)Paid link.
Sources
Printed as "Ambient temperature: -10°C−55°C (14°F−131°F), to ensure optimal operation" in the BigBattery APEX-6.5K Hybrid Inverter User Manual (Version 1.0) (PDF page 11). Printed as an installation-location factor, "to ensure optimal operation". The manual cover reads "MODEL SKU: INV034" (PDF page 1); the tables name the model "APEX-6.5kW".
Instruction manual (distributor copy): Manual Paid link.Checked Sep 18, 2026 · Earlier document
Location: PDF page 11, 4.1 Installation location
Documented
Other compliance claims: RoHS
Official product page
Sources
Printed as "Certificate: UL1741 / RoHS / EN61000-6-1 / EC61000-6-3 / FCC Part15 Class B / IEC62109-1 / IEC62109-2" on BigBattery's APEX-6.5K product page, captured on September 25, 2026. RoHS is listed without a standard number; the numbered standards in the row are recorded as separate manufacturer claims. No certificate, issuer or scope is published and no issuer record was read.
Official product page: BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture) Checked Sep 24, 2026 · Earlier document
Location: Inverter Specifications, General data, "Certificate" row
Documented

Published claims and calculations, not independent test results.

Documents

3 on file

PDF
BigBattery APEX-10K datasheetBigBatteryDatasheet (distributor copy)
Source details
Revision
Not stated
Revision date
Not stated
Manufacturer specification, not an independent test.
Location: Printed model column and specification table
Retrieved Sep 8, 2026
SHA-256: 618daad88699b775144503a18fb2c5623f8a939c0b5f79432bc9406db8ec454b
Datasheet (distributor copy): BigBattery APEX-10K datasheet Paid link.Checked Sep 8, 2026
OpenPaid link.
PDF
Manualcdn.currentconnected.comInstruction manual (distributor copy)
Source details
Revision
Not stated
Revision date
Not stated
Linked from the Current Connected product page with link text "Manual".
Location: BigBattery-INV03x-APEX-Inverter-Manual.pdf
Retrieved Sep 18, 2026
Original PDF preserved byte for byte, found linked from the Current Connected listing https://www.currentconnected.com/product/bigbattery-apex-6-5k-off-grid-inverter. The revision is whatever was published at this URL on the access date; exact variant coverage inside the document was not separately verified and no later revision was checked.
SHA-256: e867ccf127ab367cf6be3ba3a60797d8b530f9c9b63a57135c455a579670ab0e
Archived copies
Archived copy of a document published by cdn.currentconnected.com. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Archived backup Revision not recorded · 7.26 MB
Archived copy, unaltered, kept as a record of what cdn.currentconnected.com published. Original address: https://cdn.currentconnected.com/2026/02/09133611/BigBattery-INV03x-APEX-Inverter-Manual.pdfPaid link.. Copyright and takedown
Source first found
Sep 18, 2026, 10:49 AM PDT
This copy captured
Sep 18, 2026, 10:49 AM PDT
Archived
Sep 18, 2026, 10:49 AM PDT
File details
Original source Paid link.
Embedded dates are file metadata, not independent proof of publication.
SHA-256: e867ccf127ab367cf6be3ba3a60797d8b530f9c9b63a57135c455a579670ab0e
OpenPaid link.
WEB
Current Connected product listingCurrent ConnectedDistributor product page
Source details
Revision
Not stated
Revision date
Not stated
Distributor listing. Manufacturer or issuer confirmation is separate.
Location: Product identity and specifications
Retrieved Sep 8, 2026
SHA-256: e81d45036bd5003e5bf530a65a36bc1dd20d1ce2d0694893625367fe12d4d127
Distributor product page: Current Connected product listing Paid link.Checked Sep 8, 2026
OpenPaid link.

Archive and older revisions3

Earlier revisions, archived captures and copies published by someone other than the manufacturer. Every one stays reachable.

PDF
BigBattery APEX inverter spec sheet (APEX-SpecSheet0202)OfficialBigBatteryOfficial datasheet
Source details
Revision
Not stated
Revision date
Not stated
Location: Whole document
Retrieved Sep 25, 2026
Manufacturer spec sheet linked as "Spec Sheet" from the APEX-6.5K and APEX-10K product pages on bigbattery.com. The catalog already carried the same bytes as a copy a seller hosted; this record is the file on the manufacturer's own site. The PDF carries its text as images, so no figure is quoted from it here.
Archived copies
Archived copy of a document published by BigBattery. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Archived backup Revision not recorded · 1.14 MB
Archived copy, unaltered, kept as a record of what BigBattery published. Original address: https://bigbattery.com/wp-content/uploads/2026/02/APEX-SpecSheet0202.pdf. Copyright and takedown
Source first found
Sep 25, 2026
This copy captured
Sep 25, 2026, 8:00 AM PDT
Archived
Sep 25, 2026, 8:00 AM PDT
File details
Original source
Pages
2
Embedded creation date
Feb 2, 2026
Embedded dates are file metadata, not independent proof of publication.
SHA-256: 618daad88699b775144503a18fb2c5623f8a939c0b5f79432bc9406db8ec454b
Open
WEB
BigBattery APEX-6.5K off-grid inverter, SKU INV034, product page (official-source audit capture)OfficialBigBatteryOfficial product page
Source details
Revision
Not stated
Revision date
Not stated
Location: "Inverter Specifications" table
Retrieved Sep 25, 2026
BigBattery's own product page on bigbattery.com, captured on September 25, 2026 for the official-source audit; an earlier capture of the same URL that day is archived separately because the page bytes changed. Figures are manufacturer ratings as printed on the page, not test results. The page prints one specification table for the APEX-6.5K and APEX-10K with a label per model where they differ.
Open
WEB
BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture)OfficialBigBatteryOfficial product page
Source details
Revision
Not stated
Revision date
Not stated
Location: Downloads & Specifications, Inverter Specifications table
Retrieved Sep 24, 2026
BigBattery's own product page for the APEX-6.5K off-grid inverter, SKU INV034, captured on September 25, 2026; the content is whatever the URL served on that date. Figures are manufacturer ratings as printed on the page, not test results. The page prints one specification table for both APEX models; only the APEX-6.5K entries are read.
Open

Archived documents

Spec Sheet

Archived copy of a document published by cdn.currentconnected.com. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.

Archived backup Revision not recorded · 1.14 MB

Archived copy, unaltered, kept as a record of what cdn.currentconnected.com published. Original address: https://cdn.currentconnected.com/2026/02/09132758/BigBattery-INV03x-APEX-Inverter-Spec-Sheet.pdfPaid link.. Copyright and takedown

Source first found: Sep 18, 2026, 10:49 AM PDT
This copy captured: Sep 18, 2026, 10:49 AM PDT
Archived: Sep 18, 2026, 10:49 AM PDT

File details

Original source Paid link.

Embedded dates are file metadata, not independent proof of publication.

SHA-256: 618daad88699b775144503a18fb2c5623f8a939c0b5f79432bc9406db8ec454b

Manual

Archived backup Revision not recorded · 7.26 MB

Archived copy, unaltered, kept as a record of what cdn.currentconnected.com published. Original address: https://cdn.currentconnected.com/2026/02/09133611/BigBattery-INV03x-APEX-Inverter-Manual.pdfPaid link.. Copyright and takedown

Source first found: Sep 18, 2026, 10:49 AM PDT
This copy captured: Sep 18, 2026, 10:49 AM PDT
Archived: Sep 18, 2026, 10:49 AM PDT

File details

Original source Paid link.

Embedded dates are file metadata, not independent proof of publication.

SHA-256: e867ccf127ab367cf6be3ba3a60797d8b530f9c9b63a57135c455a579670ab0e

Submit a document

Warranty

Product warranty: 5 years
Distributor product pagePaid link.
Sources
Read from BigBattery's APEX-6.5K product page (SKU INV034) on bigbattery.com, "Inverter Specifications" table titled "APEX-6.5K & APEX 10K INVERTER SPECIFICATIONS", which labels figures per model. Printed: "Warranty: 5 years". Re-cited on 25 September 2026 to the manufacturer's own document; previously cited to Current Connected (currentconnected.com), which stays listed as an additional source.
Official product page: BigBattery APEX-6.5K off-grid inverter, SKU INV034, product page (official-source audit capture) Checked Sep 25, 2026 · Earlier documentDistributor product page: Current Connected product listing Paid link.Checked Sep 8, 2026
Location: Inverter Specifications, "Warranty" row
Documented

Sellers

Affiliate links below. As an Amazon Associate we earn from qualifying purchases. Affiliate disclosure

Current Connected

1 review

Listing SKU INV034

$1,250Recorded Nov 12, 2026

Visit sellerPaid link.

ShopSolar

1 review

Listing SKU INV034

$1,250Recorded Nov 12, 2026

Visit sellerPaid link.

Amazon

4.1 (7)not verified

Sold by BIGBATTERY

Listing SKU B0HBRNFLDC

$1,250Price as of Nov 12, 2026, 10:40 AM PST, may change

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BigBattery

No reviews

Listing SKU INV034

$1,250Recorded Oct 27, 2026

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Price history

Prices we read at ShopSolar, Current Connected and BigBattery · 83 readings from Sep 20, 2026 to Nov 12, 2026

Chart, listings & data

Since Sep 20, 2026 · Listing price (USD)

Current ConnectedView listing Paid link.

ShopSolarView listing Paid link.

BigBatteryView listing Paid link.

ShopSolar$1,250Nov 12, 2026, 1:26 AM PSTLatest check · hover or tap for earlier prices

A break in a line is a gap in our readings: no price is drawn for days we did not read.

Price data

Collected price observations by seller
Checked (UTC)	Seller	Price
Sep 20, 2026, 7:50 AM PDT	ShopSolar Paid link.	$1,490
Sep 20, 2026, 7:52 AM PDT	Current Connected Paid link.	$1,250
Sep 23, 2026, 4:51 AM PDT	Current Connected Paid link.	$1,250
Sep 24, 2026, 2:01 AM PDT	ShopSolar Paid link.	$1,490
Sep 24, 2026, 4:33 AM PDT	Current Connected Paid link.	$1,250
Sep 25, 2026, 2:31 AM PDT	ShopSolar Paid link.	$1,490
Sep 26, 2026, 2:32 AM PDT	Current Connected Paid link.	$1,250
Sep 27, 2026, 3:32 AM PDT	Current Connected Paid link.	$1,250
Sep 27, 2026, 4:01 AM PDT	ShopSolar Paid link.	$1,490
Sep 28, 2026, 4:32 AM PDT	Current Connected Paid link.	$1,250
Sep 28, 2026, 5:54 PM PDT	ShopSolar Paid link.	$1,490
Sep 29, 2026, 3:54 PM PDT	ShopSolar Paid link.	$1,490
Sep 29, 2026, 3:54 PM PDT	Current Connected Paid link.	$1,250
Oct 1, 2026, 1:06 AM PDT	Current Connected Paid link.	$1,250
Oct 2, 2026, 1:06 AM PDT	Current Connected Paid link.	$1,250
Oct 3, 2026, 1:06 AM PDT	Current Connected Paid link.	$1,250
Oct 3, 2026, 11:54 AM PDT	Current Connected Paid link.	$1,250
Oct 4, 2026, 1:06 AM PDT	Current Connected Paid link.	$1,250
Oct 4, 2026, 9:30 AM PDT	ShopSolar Paid link.	$1,490
Oct 5, 2026, 12:38 AM PDT	ShopSolar Paid link.	$1,490
Oct 5, 2026, 1:05 AM PDT	Current Connected Paid link.	$1,250
Oct 6, 2026, 1:05 AM PDT	Current Connected Paid link.	$1,250
Oct 6, 2026, 1:05 AM PDT	ShopSolar Paid link.	$1,490
Oct 7, 2026, 1:15 AM PDT	Current Connected Paid link.	$1,250
Oct 8, 2026, 1:05 AM PDT	Current Connected Paid link.	$1,250
Oct 8, 2026, 1:06 AM PDT	ShopSolar Paid link.	$1,490
Oct 9, 2026, 1:25 AM PDT	Current Connected Paid link.	$1,250
Oct 10, 2026, 1:46 AM PDT	Current Connected Paid link.	$1,250
Oct 11, 2026, 1:05 AM PDT	Current Connected Paid link.	$1,250
Oct 11, 2026, 1:05 AM PDT	ShopSolar Paid link.	$1,490
Oct 12, 2026, 1:26 AM PDT	Current Connected Paid link.	$1,250
Oct 13, 2026, 1:15 AM PDT	Current Connected Paid link.	$1,250
Oct 13, 2026, 1:15 AM PDT	ShopSolar Paid link.	$1,490
Oct 14, 2026, 1:25 AM PDT	Current Connected Paid link.	$1,250
Oct 15, 2026, 1:06 AM PDT	Current Connected Paid link.	$1,250
Oct 15, 2026, 1:06 AM PDT	ShopSolar Paid link.	$1,490
Oct 16, 2026, 1:06 AM PDT	Current Connected Paid link.	$1,250
Oct 16, 2026, 1:06 AM PDT	ShopSolar Paid link.	$1,490
Oct 17, 2026, 1:15 AM PDT	Current Connected Paid link.	$1,250
Oct 17, 2026, 1:16 AM PDT	ShopSolar Paid link.	$1,490
Oct 18, 2026, 1:06 AM PDT	Current Connected Paid link.	$1,250
Oct 18, 2026, 1:06 AM PDT	ShopSolar Paid link.	$1,490
Oct 19, 2026, 1:45 AM PDT	Current Connected Paid link.	$1,250
Oct 20, 2026, 1:36 AM PDT	Current Connected Paid link.	$1,250
Oct 20, 2026, 9:17 PM PDT	ShopSolar Paid link.	$1,490
Oct 21, 2026, 1:36 AM PDT	Current Connected Paid link.	$1,250
Oct 22, 2026, 1:16 AM PDT	Current Connected Paid link.	$1,250
Oct 22, 2026, 1:16 AM PDT	ShopSolar Paid link.	$1,490
Oct 23, 2026, 2:09 AM PDT	Current Connected Paid link.	$1,250
Oct 24, 2026, 1:06 AM PDT	Current Connected Paid link.	$1,250
Oct 24, 2026, 1:06 AM PDT	ShopSolar Paid link.	$1,490
Oct 25, 2026, 1:06 AM PDT	Current Connected Paid link.	$1,250
Oct 25, 2026, 1:06 AM PDT	ShopSolar Paid link.	$1,490
Oct 26, 2026, 1:07 AM PDT	Current Connected Paid link.	$1,250
Oct 26, 2026, 1:07 AM PDT	ShopSolar Paid link.	$1,490
Oct 27, 2026, 1:06 AM PDT	Current Connected Paid link.	$1,250
Oct 27, 2026, 1:07 AM PDT	ShopSolar Paid link.	$1,490
Oct 27, 2026, 8:39 AM PDT	BigBattery Paid link.	$1,250
Oct 28, 2026, 1:26 AM PDT	Current Connected Paid link.	$1,250
Oct 28, 2026, 1:26 AM PDT	ShopSolar Paid link.	$1,490
Oct 29, 2026, 1:16 AM PDT	Current Connected Paid link.	$1,250
Oct 30, 2026, 1:26 AM PDT	Current Connected Paid link.	$1,250
Oct 30, 2026, 1:26 AM PDT	ShopSolar Paid link.	$1,490
Oct 31, 2026, 1:26 AM PDT	Current Connected Paid link.	$1,250
Nov 1, 2026, 1:07 AM PDT	Current Connected Paid link.	$1,250
Nov 1, 2026, 1:07 AM PDT	ShopSolar Paid link.	$1,490
Nov 2, 2026, 1:36 AM PST	Current Connected Paid link.	$1,250
Nov 3, 2026, 1:06 AM PST	Current Connected Paid link.	$1,250
Nov 3, 2026, 1:06 AM PST	ShopSolar Paid link.	$1,250
Nov 4, 2026, 1:06 AM PST	Current Connected Paid link.	$1,250
Nov 4, 2026, 3:31 AM PST	ShopSolar Paid link.	$1,250
Nov 5, 2026, 1:06 AM PST	Current Connected Paid link.	$1,250
Nov 5, 2026, 1:06 AM PST	ShopSolar Paid link.	$1,250
Nov 6, 2026, 1:06 AM PST	Current Connected Paid link.	$1,250
Nov 7, 2026, 1:16 AM PST	Current Connected Paid link.	$1,250
Nov 7, 2026, 1:17 AM PST	ShopSolar Paid link.	$1,250
Nov 8, 2026, 1:16 AM PST	Current Connected Paid link.	$1,250
Nov 8, 2026, 1:16 AM PST	ShopSolar Paid link.	$1,250
Nov 9, 2026, 1:16 AM PST	Current Connected Paid link.	$1,250
Nov 10, 2026, 1:06 AM PST	Current Connected Paid link.	$1,250
Nov 11, 2026, 1:36 AM PST	Current Connected Paid link.	$1,250
Nov 12, 2026, 1:26 AM PST	Current Connected Paid link.	$1,250
Nov 12, 2026, 1:26 AM PST	ShopSolar Paid link.	$1,250

Owner reviews

No reviews yet

Own one? A verified review needs a receipt and a serial number photo, and counts 19× in the owner rating.

Write a review

Your reviews · Review policy

Evidence score

6/100Missing details30% documented

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 details. This number counts only the evidence recorded so far. The source review for this product is not finished, or the maker has not disclosed enough, so the number can only go up.

Missing for this product: Certificate evidence needed; Battery conversion efficiency needed; Idle consumption needed.

Each input is scored against the best documented value for an inverter: warranty term and battery conversion efficiency against every published inverter, idle consumption (lower is better) against the inverters in the same output band, or against every published inverter when the output is not documented. A documented value always earns points; an undisclosed one earns 0 and is listed as missing. Researched products receive a score. Certificates earn points for the evidence itself. Size and weight do not affect scores.

Warranty term5 years6.0 / 30.0

5 of 25 years, the best documented for an inverter (printed by the maker): APsystems DS3

Read from BigBattery's APEX-6.5K product page (SKU INV034) on bigbattery.com, "Inverter Specifications" table titled "APEX-6.5K & APEX 10K INVERTER SPECIFICATIONS", which labels figures per model. Printed: "Warranty: 5 years". Re-cited on 25 September 2026 to the manufacturer's own document; previously cited to Current Connected (currentconnected.com), which stays listed as an additional source.

Official product page: BigBattery APEX-6.5K off-grid inverter, SKU INV034, product page (official-source audit capture) Checked Sep 25, 2026 · Earlier documentDistributor product page: Current Connected product listing Paid link.Checked Sep 8, 2026

Research pending, 0 points: Certificates, Battery conversion efficiency, Idle consumption.

Warranty term and battery conversion efficiency are compared with every published inverter; idle consumption with the inverters in the same 3.5 to 7 kW output band. · Method version 0.5

How it works

Certificates

6 on fileUL 1741 · claimed

UL1741Product / system scope unresolvedClaimedListed when checked

BigBattery's own APEX-6.5K product page prints "Certificate: UL1741 / RoHS / EN61000-6-1 / EC61000-6-3 / FCC Part15 Class B / IEC62109-1 / IEC62109-2" in the General data section of a specification table shared by the APEX-6.5K and APEX-10K; UL1741 is recorded as printed, as one entry of that row. The page gives no file number, issuer, certificate or scope, and no issuer record was read. Manufacturer claim only.

Models: APEX-6.5K

Issued: Not stated
Valid from: Not stated
Expiry: Not stated
Issuer checked: Not checked

Official product page: BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture) Checked Sep 24, 2026 · Earlier document

EN61000-6-1Product / system scope unresolvedClaimedListed when checked

BigBattery's own APEX-6.5K product page prints "Certificate: UL1741 / RoHS / EN61000-6-1 / EC61000-6-3 / FCC Part15 Class B / IEC62109-1 / IEC62109-2" in the General data section of a specification table shared by the APEX-6.5K and APEX-10K; EN61000-6-1 is recorded as printed, as one entry of that row. The page gives no file number, issuer, certificate or scope, and no issuer record was read. Manufacturer claim only.

Models: APEX-6.5K

Issued: Not stated
Valid from: Not stated
Expiry: Not stated
Issuer checked: Not checked

Official product page: BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture) Checked Sep 24, 2026 · Earlier document

EC61000-6-3Product / system scope unresolvedClaimedListed when checked

BigBattery's own APEX-6.5K product page prints "Certificate: UL1741 / RoHS / EN61000-6-1 / EC61000-6-3 / FCC Part15 Class B / IEC62109-1 / IEC62109-2" in the General data section of a specification table shared by the APEX-6.5K and APEX-10K; EC61000-6-3 is recorded as printed, as one entry of that row. The page gives no file number, issuer, certificate or scope, and no issuer record was read. Manufacturer claim only.

Models: APEX-6.5K

Issued: Not stated
Valid from: Not stated
Expiry: Not stated
Issuer checked: Not checked

Official product page: BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture) Checked Sep 24, 2026 · Earlier document

FCC Part15 Class BProduct / system scope unresolvedClaimedListed when checked

BigBattery's own APEX-6.5K product page prints "Certificate: UL1741 / RoHS / EN61000-6-1 / EC61000-6-3 / FCC Part15 Class B / IEC62109-1 / IEC62109-2" in the General data section of a specification table shared by the APEX-6.5K and APEX-10K; FCC Part15 Class B is recorded as printed, as one entry of that row. The page gives no file number, issuer, certificate or scope, and no issuer record was read. Manufacturer claim only.

Models: APEX-6.5K

Issued: Not stated
Valid from: Not stated
Expiry: Not stated
Issuer checked: Not checked

Official product page: BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture) Checked Sep 24, 2026 · Earlier document

IEC62109-1Product / system scope unresolvedClaimedListed when checked

BigBattery's own APEX-6.5K product page prints "Certificate: UL1741 / RoHS / EN61000-6-1 / EC61000-6-3 / FCC Part15 Class B / IEC62109-1 / IEC62109-2" in the General data section of a specification table shared by the APEX-6.5K and APEX-10K; IEC62109-1 is recorded as printed, as one entry of that row. The page gives no file number, issuer, certificate or scope, and no issuer record was read. Manufacturer claim only.

Models: APEX-6.5K

Issued: Not stated
Valid from: Not stated
Expiry: Not stated
Issuer checked: Not checked

Official product page: BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture) Checked Sep 24, 2026 · Earlier document

IEC62109-2Product / system scope unresolvedClaimedListed when checked

BigBattery's own APEX-6.5K product page prints "Certificate: UL1741 / RoHS / EN61000-6-1 / EC61000-6-3 / FCC Part15 Class B / IEC62109-1 / IEC62109-2" in the General data section of a specification table shared by the APEX-6.5K and APEX-10K; IEC62109-2 is recorded as printed, as one entry of that row. The page gives no file number, issuer, certificate or scope, and no issuer record was read. Manufacturer claim only.

Models: APEX-6.5K

Issued: Not stated
Valid from: Not stated
Expiry: Not stated
Issuer checked: Not checked

Official product page: BigBattery APEX-6.5K off-grid inverter product page (September 25, 2026 capture) Checked Sep 24, 2026 · Earlier document

Certificate guide

Parts and accessories

No sourced accessories or replacement parts listed yet.

Model history

Model identity

Model: INV034

Manufacturer SKU INV034

No historical observations recorded yet.

Community discussions

No discussions linked yet. Search DIY Solar Forum

Recalls / legal notices

No recalls or legal notices on file; this is not a complete recall or court search. All notices · Report a notice

BigBatteryProducts, reviews and history

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Something wrong that is not one of the values above?

Prices · price basis. * Calculated; estimates labeled. Value needs confirmation; select it for the reason.