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Image source: Morningstar SureSine Classic SI-300-115V-UL, the image Morningstar places at the head of the SI-300-115V-UL (60 Hz) column of the SureSine Classic specifications table; the unit's label reads 115 Vac, 60 HzPaid link. As an Amazon Associate we earn from qualifying purchases. Price as of Nov 12, 2026, 8:40 AM PST, may change
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Morningstar's datasheet names the version "SI-300-115V-UL" and the SureSine Classic product page heads its first column "SI-300-115V-UL (60 Hz)". The manual (Oct 06) names the 115 V model "SI-300-115V".
Official datasheet: Morningstar SureSine Inverter datasheet, versions SI-300-115V-UL and SI-300-220V (Control # MS-002517, Revision 217E-R5, 2/20) Checked · Earlier documentOfficial product page: Morningstar SureSine Classic product page, morningstarcorp.com (October 28, 2026 (UTC) capture) Checked · Earlier documentLocation: Datasheet page 2, Versions row; product page, Specifications & Certifications model column
Documented
The datasheet prints "No Internal Cooling Fan" and "no internal cooling fan or other moving parts"; the manual prints no cooling figure.
Official datasheet: Morningstar SureSine Inverter datasheet, versions SI-300-115V-UL and SI-300-220V (Control # MS-002517, Revision 217E-R5, 2/20) Checked · Earlier documentLocation: Page 1, Key Features, Extremely High Reliability
Documented
Printed as "4.5 Kg / 10.0 lbs" in the manual and the datasheet.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Weight row
Documented
Printed as "Peak Power Rating 600 Watts @ 25°C (15 min)" once for both models in the manual; the datasheet prints "Peak Power Rating (15 minutes) 600 Watts @ 25°C" and describes "a 200% surge during load start-up, to a maximum of 600W".
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Peak Power Rating row
Documented
Printed as "115V +/- 10%" in the SI-300-115V column of the manual (cover: "115 V @ 60 Hz"); the datasheet prints "220V or 115V +/– 10%" for its two versions.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: Cover, model table; 8.0 Technical Specifications, page 15, AC Output Voltage (RMS) row
Documented
Printed as "213 x 152 x 105 mm / 8.4 x 6.0 x 4.1 in" in the manual and the datasheet; published source order, the documents do not label the axes.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Dimensions row
Calculated
Printed as "RJ-11 Connection Morningstar Meterbus / Modbus 16-bit RTU **" in the manual; DIP switch 4 selects Meterbus or Modbus, and an adapter (not included) is needed for PC communications.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Data Communications row; 2.0 Overview
Documented
Peak efficiency, printed as "92%" in the SI-300-115V column of the manual (the SI-300-220V column prints 91%); the datasheet prints "Peak Efficiency 92%".
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Peak Efficiency row
Documented
Printed as "60 Hz +/- 0.1%" in the SI-300-115V column of the manual.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: Cover, model table; 8.0 Technical Specifications, page 15, AC Output Frequency row
Documented
Printed as "Peak Power Rating 600 Watts @ 25°C (15 min)" once for both models in the manual; the datasheet prints "Peak Power Rating (15 minutes) 600 Watts @ 25°C" and describes "a 200% surge during load start-up, to a maximum of 600W".
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Peak Power Rating row
Documented
Printed as "115V +/- 10%" in the SI-300-115V column of the manual (cover: "115 V @ 60 Hz"); the datasheet prints "220V or 115V +/– 10%" for its two versions.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: Cover, model table; 8.0 Technical Specifications, page 15, AC Output Voltage (RMS) row
Documented
Peak efficiency, printed as "92%" in the SI-300-115V column of the manual (the SI-300-220V column prints 91%); the datasheet prints "Peak Efficiency 92%".
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Peak Efficiency row
Documented
Printed as "60 Hz +/- 0.1%" in the SI-300-115V column of the manual.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: Cover, model table; 8.0 Technical Specifications, page 15, AC Output Frequency row
Documented
Printed as "Waveform Pure sine wave" in the manual.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Waveform row
Documented
Printed as "12 Vdc" for the SI-300-115V on the manual's cover; the manual's DC wiring step says "Use nominal 12Vdc input only".
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: Cover, model table, DC Input column
Documented
Converted: 300 W / 1000 = 0.3 kW
Printed as "300 Watts @ 25°C" in the SI-300-115V column of the manual; the datasheet prints "Continuous Power Rating 300 Watts @ 25°C" for both versions. 300 W expressed in kW.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Nominal Power Rating row
Converted
Printed as "300 Watts @ 25°C" in the SI-300-115V column of the manual ("Continuous Power Rating 300 Watts @ 25°C" on the datasheet). The datasheet's temperature de-rate curve shows less continuous power at higher ambient temperatures; the curve is not recorded.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Nominal Power Rating row
Documented
Printed as "DC Input Voltage 10.0V – 15.5V" once for both models in the manual (the same on the datasheet); the manual warns that exceeding the 15.5V maximum input voltage may damage the inverter.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, DC Input Voltage row
Documented
The datasheet prints "No Internal Cooling Fan" and "no internal cooling fan or other moving parts"; the manual prints no cooling figure.
Official datasheet: Morningstar SureSine Inverter datasheet, versions SI-300-115V-UL and SI-300-220V (Control # MS-002517, Revision 217E-R5, 2/20) Checked · Earlier documentLocation: Page 1, Key Features, Extremely High Reliability
Documented
Printed as "4.5 Kg / 10.0 lbs" in the manual and the datasheet.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Weight row
Documented
Printed as "213 x 152 x 105 mm / 8.4 x 6.0 x 4.1 in" in the manual and the datasheet; published source order, the documents do not label the axes.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Dimensions row
Calculated
Printed as "RJ-11 Connection Morningstar Meterbus / Modbus 16-bit RTU **" in the manual; DIP switch 4 selects Meterbus or Modbus, and an adapter (not included) is needed for PC communications.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Data Communications row; 2.0 Overview
Documented
Printed as "Enclosure Type 1 (Indoor Only)" and "Enclosure Rating IP20" in the manual; the datasheet prints "Enclosure: IP20" and "Cast anodized aluminum".
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Enclosure Type and Enclosure Rating rows
Documented
Printed as "DC Terminals: Wire Size 2.5 to 35 mm2 / 14 to 2 AWG" in the manual's specifications; the wiring steps call for "UL Listed 6 AWG (6 mm2) or larger" battery wire and a "UL Listed 4 AWG (25 mm2) or larger" earth ground conductor.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, DC Terminals Wire Size row; Step 5 DC Wiring, pages 9 and 10
Documented
Printed as "Torque 0.80 Nm / 7.0 in-lb" for the AC terminals.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, AC Terminals Torque row
Documented
Printed as "AC Terminals: Wire Size up to 4 mm2 / up to 12 AWG" in the manual's specifications; the AC wiring step calls for UL Listed 12AWG (4 mm2) wire.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, AC Terminals Wire Size row; Step 3 AC Wiring, page 7
Documented
Printed as the datasheet's Electronic Protections list: "Reverse Polarity (fused)", "AC Short Circuit", "AC Overload", "High Voltage Disconnect", "Low Battery Disconnect", "High Temperature Disconnect"; the manual's section 5.0 Protections describes the same protections.
Official datasheet: Morningstar SureSine Inverter datasheet, versions SI-300-115V-UL and SI-300-220V (Control # MS-002517, Revision 217E-R5, 2/20) Checked · Earlier documentLocation: Page 2, Electronic Protections
Documented
Printed in the datasheet's Certifications list (the manual prints none): "ETL Listed (UL 458) - 115V version ONLY", "CE and REACH Compliant", "FCC Title 47 (CFR), Part 15 Subpart B for Class B Device Compliant" and "EN 60950-1+A11:2001, rev. 4/4/04"; "Manufactured in a Certified ISO 9001 Facility" is a factory claim and is not recorded here. The product page marks "ETL Listed [UL-458]" Yes for SI-300-115V-UL only, and prints "CE and RoHS compliant" where the datasheet prints CE and REACH. Claims by the maker; no listing record was read.
Official datasheet: Morningstar SureSine Inverter datasheet, versions SI-300-115V-UL and SI-300-220V (Control # MS-002517, Revision 217E-R5, 2/20) Checked · Earlier documentLocation: Page 2, Certifications
Documented
Printed as "SureSine may be mounted horizontally on a flat surface (like a table) or vertically (on a wall)"; the manual also says not to mount it in a zero-clearance compartment.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 3.0 Installation, Step 1 Mounting, page 5
Documented
Morningstar's manual prints a storage range of -40°C to +85°C and its newer datasheet prints –55°C to +85°C; both are shown.
Printed as "Storage Temperature -40°C to +85°C" in the manual (primary). The newer datasheet prints a different lower limit, "Storage Temperature: –55°C to +85°C", kept beside it.
Printed as "Storage Temperature: –55°C to +85°C" on the datasheet (Revision 217E-R5, 2/20); the manual prints -40°C to +85°C.
Official datasheet: Morningstar SureSine Inverter datasheet, versions SI-300-115V-UL and SI-300-220V (Control # MS-002517, Revision 217E-R5, 2/20) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Storage Temperature row
Documented
Printed as required parts, not included: "3A AC in-line fuse" and "100A DC in-line fuse"; the DC fuse goes in the positive battery cable no further than 12" (305 mm) from the battery positive post.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 3.0 Installation, Required Parts (not included), page 5; Step 5 DC Wiring
Documented
Printed as "Torque 5.65 Nm / 50 in-lb" for the DC terminals.
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, DC Terminals Torque row
Documented
Printed as "-40°C to +45°C" in the manual; the datasheet prints "Ambient Operating Temp: –40°C to +45°C".
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 8.0 Technical Specifications, page 15, Operating Temperature Range row
Documented
Published claims and calculations, not independent test results.
Archived copy captured on 2026-10-28.
Location: Page 2, Technical Specifications, Mechanical and Environmental Specifications, Certifications, Warranty
Retrieved
Morningstar's two-page English datasheet for the SureSine inverter, linked as the English datasheet from the SureSine Classic product page on morningstarcorp.com, captured October 28, 2026 (UTC). Its Technical Specifications name two versions, SI-300-115V-UL and SI-300-220V, and print the electrical figures once for both ("220V or 115V", "50 or 60 Hz"); the certifications list says the ETL listing applies to the 115V version only. Control # MS-002517 Revision 217E-R5. 2/20. It is newer than the manual, which is primary. Manufacturer claims, not independent tests.
Archived copy of a document published by Morningstar. 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 Morningstar published. Original address: https://www.morningstarcorp.com/wp-content/uploads/datasheet-suresine-classic-en.pdf. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: 9be73d155e905b2a32baef8fd7a01b274103eb1ada884b056bfb29094ed4d553
Archived copy captured on 2026-10-28.
Location: Cover; 3.0 Installation (pages 5 to 10); 7.0 Warranty (page 14); 8.0 Technical Specifications (page 15)
Retrieved
Morningstar's English installation and operation manual for the SureSine 300 W inverter, linked as the English operation manual from the SureSine Classic product page on morningstarcorp.com, captured October 28, 2026 (UTC). Its cover names two models, SI-300-115V (12 Vdc, 115 V at 60 Hz) and SI-300-220V (12 Vdc, 220 V at 50 Hz); section 8.0 Technical Specifications (page 15) prints one column per model, SI-300-220V first. Revision mark MS-ZMAN-SI-EN-A (Oct 06). Manufacturer claims, not independent tests.
Archived copy of a document published by Morningstar. 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 Morningstar published. Original address: https://www.morningstarcorp.com/wp-content/uploads/operation-manual-suresine-classic-en.pdf. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: 936dc2ca9f11e146671058f5dc48cf1896f8cb39834fda1d22e7574ac184a20e
Archived copy captured on 2026-10-28.
Location: Specifications & Certifications table (model column headers and rows); Resources
Retrieved
Morningstar's own product page for the SureSine Classic 300 W off-grid inverter, captured October 28, 2026 (UTC); the content is whatever the address served on that date. Its Specifications & Certifications table has one column per model, SI-300-115V-UL (60 Hz) and SI-300-220V (50 Hz), each headed by Morningstar's image of that model; it links the datasheet and operation manual used here. It carries no revision date. Manufacturer claims, not independent tests.
Earlier revisions, archived captures and copies published by someone other than the manufacturer. Every one stays reachable.
Archived copy of a document published by Morningstar. 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 Morningstar published. Original address: https://www.morningstarcorp.com/wp-content/uploads/operation-manual-suresine-classic-en.pdf. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: 936dc2ca9f11e146671058f5dc48cf1896f8cb39834fda1d22e7574ac184a20e
Archived copy of a document published by Morningstar. 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 Morningstar published. Original address: https://www.morningstarcorp.com/wp-content/uploads/datasheet-suresine-classic-en.pdf. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: 9be73d155e905b2a32baef8fd7a01b274103eb1ada884b056bfb29094ed4d553
Printed as "free from defects in material and workmanship for a period of TWO (2) years from the date of shipment to the original end user"; the datasheet prints "Two year warranty period."
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentLocation: 7.0 Warranty, page 14
Documented
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
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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 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.
2 of 25 years, the best documented for an inverter (printed by the maker): APsystems DS3
Printed as "free from defects in material and workmanship for a period of TWO (2) years from the date of shipment to the original end user"; the datasheet prints "Two year warranty period."
Official instruction manual: Morningstar SureSine 300 Watt Pure Sine Wave Inverter Installation and Operation Manual, SI-300-115V and SI-300-220V (MS-ZMAN-SI-EN-A, Oct 06) Checked · Earlier documentResearch 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 0 to 1.5 kW output band. · Method version 0.5
How it worksNo certificates on file. Certificate guide
No sourced accessories or replacement parts listed yet.
Manufacturer SKU SI-300-115V-UL · US market
No historical observations recorded yet.
No discussions linked yet. Search DIY Solar Forum
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