Guides

Guides for homeowners with orphaned solar leases

Plain-English answers about solar production guarantees, who your servicer is now, and how to check whether your guarantee was met.

Enter your guaranteed and actual production to estimate whether your lease owes you a credit.

A dated table of who now services SunPower, Sunnova and PosiGen leases.

Definition, cycle, surplus carryover and a hypothetical worked example.

The step-by-step comparison of actual output against your guarantee.

What the research found about guarantees after the bankruptcies, and the edge case.

Contact routes, what to document and when to escalate.

What the BrightBuy with Protection Plus contract language says, and what is unconfirmed.

No servicer publishes an official timeline. What our research found about typical response times and when to escalate.

The inputs, formula, assumptions and limits behind the calculation.

Guides are reviewed against GuaranteeCheck's own research and dated on each page. They are general information for homeowners, not legal advice.

Not legal advice. Not affiliated with Sunnova, SunPower, PosiGen, SunStrong, Sunrun or Renewbrook. You send the letter yourself.