Warranty comparison
Fronius vs Sungrow
The same four questions asked of both: how long on parts, how long on labour, what has to be registered, and what has to stay true.
Checked 28 July 2026
On warranty terms
Line ball
Neither asks meaningfully less than the other.
Fronius and Sungrow land in much the same place on warranty terms, and the choice comes down to what each one needs from you rather than to the headline number.
Side by side
| Fronius | Sungrow | |
|---|---|---|
Parts cover | 10 years | 10 years |
Labour cover | 1 year | 1 year |
Registration window | 30 months | None |
Conditions to keep the term | None | None |
Who registers | Register | Verify |
Product lines | 1 | 2 |
Checked | 2026-07-28 | 2026-07-28 |
What separates them
- Both carry 10 years on parts, so the parts term is not the thing that separates them.
Fronius
Checked 28 July 2026
Fronius gives 10 years on its inverters through Warranty Plus, free but not automatic: the unit has to be registered in Solar.web within 30 months of delivery ex works. Registering also moves the start of cover from delivery to commissioning. Units installed before 1 October 2024 use a 24 month window from installation instead.
Nothing has to stay true
Fronius attaches no conditions to the full term in the document we read. Keep the serial, the invoice and the install date with the job and the claim file is complete.
Sungrow
Checked 28 July 2026
Sungrow has no registration deadline and no registration requirement. The 10 year term runs from the installation date whether anyone registers or not. EV chargers are the one exception: the installer registers those within a month. Keep proof of the install date, because the whole term hangs off it.
Nothing has to stay true
Sungrow attaches no conditions to the full term in the document we read. Keep the serial, the invoice and the install date with the job and the claim file is complete.
Where this came from
Checked against
Checked 28 July 2026
Warranty terms change and differ by country. This is a reading of the manufacturer's published document on the date shown, not legal advice, and not a substitute for the document that applies to the model you installed.
The full references
Claim Timer already holds these terms
One record per piece of equipment, with the serial, the nameplate photo and each brand's conditions on it. Put your next install in and the claim is built before the part fails.