No formal product warranty has been published as at June 2026. Tandem PV has stated it targets 25-year performance consistent with industry standards and utility-scale warranty requirements, but no binding warranty document exists. Commercial sales have not commenced: the Fremont, California demonstration facility began module production in April 2026, with first commercial shipments targeting late 2026.

No published linear performance warranty exists as at June 2026. Tandem PV reports internal accelerated lifetime testing showing under 1% average annual power loss and targets degradation consistent with the utility-scale market, but no binding warranty, retention floor, or degradation schedule is contractually specified.

With no formal warranty document published, no covered defects or terms can be confirmed. Public communications focus on accelerated durability testing and industry-standard lifetime performance: technical claims, not contractual coverage. Request draft warranty documentation directly from Tandem PV before committing to purchase.