“25-year warranty” can refer to very different promises. Identify the responsible party for each layer.
- Product warranty: defects in panels, inverters or batteries.
- Performance warranty: an expected long-term output level.
- Workmanship warranty: installation labor and workmanship.
- Roof-penetration coverage: leaks or damage associated with attachments.
Ask whether labor, shipping, diagnosis and removal are included in a manufacturer claim.
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Rules, rates, products and programs change. Verify current information with the linked official source and the final written contract.