Reviewed 2026-08 · Document German manufacturer guarantee (checked 2026-08-23)
Very good
Guarantee & backbone
About this document
review.solar’s plain-language summary of the manufacturer’s warranty terms as at the review date. Not a legal instrument: verify current terms with the manufacturer before making a claim.
10yr
Warranty period
80%
Capacity at end of term
Parts only
Coverage
Capacity guarantee: minimum retained at year 10
Rated capacity (reference)Guaranteed floor: 80.0% at yr 10
No year-by-year capacity schedule is published for this product - the manufacturer guarantees only this end-of-term minimum, not a specific decline curve.
The guarantee
Guarantee period
Capacity retention endpoint
Manufacturer remedy
Transport boundary
What voids or limits it
Australian coverage
Labour, travel and site work
Operation outside product conditions
How to claim
Use the German sonnen service and guarantee pathway for the exact sonnenBatterie 10/11. Full summary, conditions and sources: page 2.
The current German product surface states a ten-year manufacturer guarantee or 10,000 charging cycles for the exact sonnenBatterie 10/11 family.
Capacity retention endpoint
The current product FAQ states an 80% retained-capacity endpoint. The governing German guarantee controls eligibility, measurement and remedy.
What’s covered
Manufacturer remedy
The governing German manufacturer guarantee controls repair or replacement of an eligible defect.
Transport boundary
The reviewed terms support transport of an eligible replacement to the original installation site. They do not establish unconditional owner-selected labour, travel, removal or reinstallation coverage.
Exclusions
Australian coverage: The exact sonnenBatterie 10/11 is not a current Australian product. Australian sonnenBatterie Evo warranty and service terms do not create an entitlement for this European identity.
Labour, travel and site work: Unconditional labour, travel, removal and reinstallation coverage was not established from the reviewed public German surfaces.
Operation outside product conditions: Installation, commissioning and operation remain subject to the exact product documentation and governing guarantee.
Transferability
No automatic transfer to a subsequent purchaser: transfer requires sonnen's prior written consent, which sonnen states will not be unreasonably withheld. Second-hand buyers should obtain written confirmation of transfer from sonnen before settlement.
How to make a claim
Use the German sonnen service and guarantee pathway for the exact sonnenBatterie 10/11. An Australian buyer should not assume local Evo coverage applies to an imported or otherwise unavailable 10/11 configuration.