Manufacturer and seller images. Configuration examples may include additional equipment.
Image source: BioLite Backup ExtendNo sellers found.
BioLite's own ordering SKU, printed as "sku":"BUA0102" in the US storefront listing captured on September 26, 2026.
Official store listing: BioLite store Checked · Earlier documentLocation: products[].variants[].sku for handle "backup-extend-expansion-battery"
Documented
Printed as "Type: LiFePO4" for Backup Core and Extend.
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 6, Technical Specifications, Type
Documented
Printed as "Extend: 1.536 kWh"; not labeled as usable or nominal.
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 6, Technical Specifications, Capacity
Documented
Printed as "Backup will accept solar panel voltages up to 60V".
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 23 and 24, Charging Safety and Charging Via A Solar Panel
Documented
Printed as "Cycle Life: 4,000 cycles to 80% original capacity" for Backup Core and Extend.
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 6, Technical Specifications, Cycle Life
Documented
Converted: 36 lb x 0.45359237 kg/lb, rounded to 0.01 kg
Printed as "Weight, Extend: 36 lbs"; converted to kilograms.
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 6, Weight & Dimensions
Converted
The page prints "Requires a Backup Core" and "You can connect up to (6) Backup Extends to a Backup Core for a total of 10.5 KWh of battery capacity."
Official product page: BioLite Backup Extend product page, US store (September 26, 2026 capture) Checked · Earlier documentLocation: Product page description and FAQ
Documented
As printed: "6 DC Port In, Extend Connect to Backup Core 7 DC Port In/Out, Extend Connect additional Backup Extends (up to 6) or connect solar adapter for solar charging". The page lists "Outputs DC Out (For additional Extends)".
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 7, Input/Output & Interface
Documented
Converted: 1.536 kWh x 1000 Wh/kWh
Printed as "Extend: 1.536 kWh"; 1.536 kWh expressed in Wh.
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 6, Technical Specifications, Capacity
Converted
2 specs not documented yet: usable energy, dimensionsHelp fill in ›
Printed as "Type: LiFePO4" for Backup Core and Extend.
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 6, Technical Specifications, Type
Documented
Printed as "Extend: 1.536 kWh"; not labeled as usable or nominal.
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 6, Technical Specifications, Capacity
Documented
Printed as "Backup will accept solar panel voltages up to 60V".
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 23 and 24, Charging Safety and Charging Via A Solar Panel
Documented
Printed as "Cycle Life: 4,000 cycles to 80% original capacity" for Backup Core and Extend.
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 6, Technical Specifications, Cycle Life
Documented
Printed as "Cycle Life: 4,000 cycles to 80% original capacity" in the same maker document as the recorded cycle life; the cycle life ends at 80% of capacity as printed.
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 6, Technical Specifications, Cycle Life
Documented
Published claims and calculations are not independently tested lifetime output.
Converted: 36 lb x 0.45359237 kg/lb, rounded to 0.01 kg
Printed as "Weight, Extend: 36 lbs"; converted to kilograms.
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 6, Weight & Dimensions
Converted
The page prints "Requires a Backup Core" and "You can connect up to (6) Backup Extends to a Backup Core for a total of 10.5 KWh of battery capacity."
Official product page: BioLite Backup Extend product page, US store (September 26, 2026 capture) Checked · Earlier documentLocation: Product page description and FAQ
Documented
As printed: "6 DC Port In, Extend Connect to Backup Core 7 DC Port In/Out, Extend Connect additional Backup Extends (up to 6) or connect solar adapter for solar charging". The page lists "Outputs DC Out (For additional Extends)".
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 7, Input/Output & Interface
Documented
Converted: 1.536 kWh x 1000 Wh/kWh
Printed as "Extend: 1.536 kWh"; 1.536 kWh expressed in Wh.
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 6, Technical Specifications, Capacity
Converted
Printed as "DC Recharging: 750W (Core), 1200W (Extend)"; the solar section prints "Backup Complete Or Multiple Backup Extends: Up To 1200W (3x Nomad 400+)", a system figure with a Core.
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 6, Technical Specifications, Charging Up
Documented
Charged Reviews classified this product from the documents it is based on. It is our own grouping, not a manufacturer claim.
Printed as "Up to two (2) Backup Core / Extend units may be stacked on top of each other." and "Vertical Wall Mount Installation". Classified as Stackable from the maker's own words for this model; the maker also prints wall or floor mounting, quoted here (PM decision, October 13, 2026: a unit printing both stacking words and wall or floor words is Stackable).
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend, Installation Safety, page 4 and contents, page 3
Published claims and calculations, not independent test results.
Location: Technical Specifications (PDF page 6), Charging Via A Solar Panel (PDF page 24), Warranty & Regulatory (PDF page 28)
Retrieved
BioLite's user guide for Backup Core and Backup Extend, linked as "Download Instruction Manual (PDF)" from both US product pages and captured on September 26, 2026. The file name reads 750-00081_RevB; the guide prints Copyright 2026 and no revision date. Manufacturer claims, not independent tests.
Archived copy of a document published by BioLite. 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 BioLite published. Original address: https://cdn.shopify.com/s/files/1/0666/9741/files/750-00081_RevB_BackupByBioLite_InstructionManual_Reader.pdf?v=1785242498. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: 7a07eb6b9e3de76b90950b60881496c1eac64ae07bf0ffd302c2e4568bf96a94
Earlier revisions, archived captures and copies published by someone other than the manufacturer. Every one stays reachable.
Location: Tech Specs block and FAQs
Retrieved
BioLite's US product page for Backup Extend, captured on September 26, 2026; the page prints "Ships By October 2026". It carries a Tech Specs block and FAQs and no revision date. Manufacturer claims, not independent tests.
Archived copy of a document published by BioLite. 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 BioLite published. Original address: https://cdn.shopify.com/s/files/1/0666/9741/files/750-00081_RevB_BackupByBioLite_InstructionManual_Reader.pdf?v=1785242498. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: 7a07eb6b9e3de76b90950b60881496c1eac64ae07bf0ffd302c2e4568bf96a94
Printed as "This warranty applies to the original purchaser only and is non-transferable."
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 28, Limited Warranty
Documented
Printed as "BioLite Inc. warrants Backup Core and Backup Extend against defects in materials and workmanship for a period of 5 years from the date of original purchase by the end user."
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentLocation: PDF page 28, Limited Warranty
Documented
No sellers found.
No seller price history.
No reviews yet
Own one? A verified review needs a receipt and a serial number photo, and counts 19× in the owner rating.
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: Certificates evidence needed; Warranty energy disclosure evidence needed; Cell model disclosure evidence needed.
Stackable · Expansion · Rated capacity
The warranty term and the lifetime energy are each scored against the best documented value for an expansion battery: a value earns its share of that best, times the weight. A documented value always earns points; an undisclosed one earns 0.
5 years · 20% weight
5 of 10 years, the best documented for an expansion battery (printed by the maker): Anker SOLIX BP2700 Extension battery (2688Wh)
Printed as "BioLite Inc. warrants Backup Core and Backup Extend against defects in materials and workmanship for a period of 5 years from the date of original purchase by the end user."
50 / 100 × 20 = 10 points.
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentCycle rating disclosed · 20% weight
Documented cycle rating earns 20% of this criterion. More evidence is needed to compare lifetime MWh per kWh.
20 × 0.2 = 4 points.
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentResearch pending, 0 points: Certificates, Warranty energy disclosure, Cell model disclosure.
Computed from public specifications and evidence records. Warranty duration is not service quality; certificate evidence points are not a safety rating. Compatibility and installation limits still apply.
BioLite's Backup By BioLite User Guide (file 750-00081_RevB, captured September 26, 2026) prints "CONFORMS TO THE FOLLOWING STANDARDS • UL 1778 (Core) • UL 1973 • UN 38.3" on its Warranty & Regulatory page. The guide covers Backup Core and Backup Extend and does not tie UL 1973 to one unit. No listing mark, file number, certification body or date is printed, and no issuer record was read. Manufacturer claim only.
Models: Backup Extend
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentBioLite's Backup By BioLite User Guide (file 750-00081_RevB, captured September 26, 2026) prints "CONFORMS TO THE FOLLOWING STANDARDS • UL 1778 (Core) • UL 1973 • UN 38.3" on its Warranty & Regulatory page. The guide covers Backup Core and Backup Extend and does not tie UN 38.3 to one unit. UN 38.3 is a transport test for lithium batteries. No test summary, laboratory or date is printed, and no issuer record was read. Manufacturer claim only.
Models: Backup Extend
Official document: Backup By BioLite User Guide (file 750-00081_RevB), covering Backup Core and Backup Extend Rev Rev B (file name) · Checked · Earlier documentNo sourced accessories or replacement parts listed yet.
Manufacturer SKU BUA0102 · US market
No historical observations recorded yet.
No 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.
