The lender is usually separate from the installer
When a homeowner signs a solar contract financed through GoodLeap, Mosaic, Sunlight Financial, Service Finance Company, or another lender, two things are being signed: the installation contract with the solar company, and the loan agreement with the lender. The loan is what funds the purchase. The installer gets paid by the lender at closing, and from that point forward the homeowner owes the lender — not the installer — the monthly payment.
This separation matters because the installer and the lender often have different obligations under different laws. The Federal Trade Commission's Holder Rule (16 CFR Part 433) is relevant here — under the FTC's Holder Rule, the lender is generally subject to claims and defenses the consumer could assert against the original seller. A qualified attorney evaluates how the Holder Rule may apply to a specific loan.