How you pay for solar changes ownership, payment obligations, incentive treatment, maintenance responsibility, and end-of-contract options. Start with proposals for the same equipment, labor, warranties, and services. If a price or term is not provided, keep it missing instead of filling it with a national assumption.
Cash purchase: ownership without loan charges
With a cash purchase, the homeowner buys the system rather than financing the price or paying a third-party owner for its use or output. Record the gross installed quote, the same-scope unfinanced cash price, other owner costs paid at closing, and only incentives the household actually receives. Avoided utility purchases may be part of the household's later cash flow, but they are not a guaranteed investment return.
Loan: ownership financed under a contract
A loan spreads the purchase price under its own repayment terms. Compare the contractual principal or note amount, upfront payment, note rate, payment frequency, schedule type, term, APR, amount financed, finance charge, and total of payments when those disclosures apply. The CFPB's solar-financing issue spotlight, published August 7, 2024, reports that some solar-specific loans include financing-related markups in the principal and that the difference from the cash price may not be clearly explained. That is a reason to request written cash and financed prices for the same scope; it is not proof that any particular quote contains a dealer fee. See the focused solar-loan checklist.
Lease and PPA: distinct third-party ownership contracts
In both structures, a provider owns the system. A lease generally charges for use of the system, while an on-site PPA charges for measured electricity under a per-kWh contract. Review the complete payment or price schedule, escalators, production and true-up terms, transfer and buyout rules, maintenance duties, incentive allocation, and end-of-term options. Availability and electricity-sale rules vary by jurisdiction. The FTC's solar consumer guide provides a starting checklist for purchase, lease, and PPA distinctions.
Compare entered cash flows, not product labels
Use the financing comparator with the terms from each proposal. It keeps cash, loan, lease, and PPA schedules separate and returns “not modeled” for unsupported structures rather than guessing. Compare what is included, what remains outside the model, and who owns each obligation; the product name alone does not establish a winner.
Solar is one piece of a bigger household-finance picture. For decisions that touch your taxes, retirement timeline, or home equity, it can be worth talking to a financial advisor through a directory like AdvisorWorld — alongside primary sources such as DOE, DSIRE, and the IRS.