Battery warranties · Living benchmark

A battery warranty is a term, a throughput limit and a company standing behind both.

A ten-year label can conceal four materially different contracts. The battery may hit a throughput ceiling first, finish the term with a lower retained-capacity promise, exclude labour, or rely on a manufacturer whose financial position has changed. This report reads those conditions separately across 28 active home-battery records and rebuilds when the catalogue changes.

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Active home batteries

Published warranty terms cluster, but the contract underneath does not

10-year term22

12.5-year term1

15-year term5

Chart data

Series	Value	Note
10-year term	22
12.5-year term	1
15-year term	5

What the headline omits

Five checks determine how much of the promise survives a claim

1. 01
   Duration

   20 of 28 term rows are directly linked. The calendar term should resolve to the exact warranty document, not a reseller summary.

2. 02
   Throughput

   26 of 28 records publish a state. A cycle or MWh ceiling can end coverage before the nominal year.

3. 03
   Retention

   26 of 28 records publish a state. End-of-term retained energy determines what degradation the warranty actually tolerates.

4. 04
   Remedy

   Parts, labour and transport differ. A replacement part is not the same economic promise as removal, freight and reinstallation.

5. 05
   Backing

   2 active financial-risk notes. A long obligation is only as useful as the entity expected to honour it.

The comparison

The table is intentionally dense. It lets a buyer compare the contract before opening a scorecard, while every product name returns to the full evidence trail.

What moves when the catalogue changes

Counts, charts and rows come from the current vendored dataset. A new battery, a revised warranty document, a source-link correction or a manufacturer-backing update will move this page on the next publication build. Historical warranty text should still be checked against the purchase date and installed model.

How to use it

• Match the exact model and region before relying on a term.
• Read the earliest-of conditions for calendar years, cycles and energy throughput.
• Check retained capacity at the end of the term, not only the duration.
• Price labour, transport and access costs that the remedy does not cover.
• Review manufacturer backing as a separate risk from product performance.

Sources and methodliving dataset

• Current home-battery catalogue, with direct scorecard links in the comparison table.
• Published Solar Analytica methodology, including evidence states and missing-data treatment.
• Ownership, funding, inclusion and corrections register.