Prepaid solar in California runs roughly 20% to 40% below the cash price, and Propel is the prepaid lease US Power leads with. Participate and Maxwell Power are alternatives when your credit, utility or preferences point elsewhere. Here is how all three compare.
Prepaid solar in California runs roughly 20% to 40% below the cash price of the same system. US Power leads with Propel, a prepaid lease with a built-in buyout, and offers Participate or Maxwell Power when credit or utility eligibility calls for it.
You are three proposals deep. One says Propel, one says Participate, and a third mentions Maxwell Power. Each promises a big discount on solar and a battery, and none of them looks like the bank loan you expected.
There is a reason for that. The 30% homeowner tax credit expired on December 31, 2025, so these prepaid programs now pass a business tax credit to you as a lower price. This guide puts Propel vs Participate vs Maxwell Power side by side for California. Propel is the prepaid lease US Power recommends first, and the other two are alternatives we can work on if you prefer them or your eligibility calls for it.
Prepaid solar in California generally lands 20% to 40% below the cash price of the same system, based on Solar.com's 2026 guides to each program. The three programs earn that discount differently. Propel turns the prepayment into a fixed 25-year loan. Participate asks for one lump sum with no credit check. Maxwell Power sells a prepaid PPA with $0 monthly solar payments.
These are ranges reported by Solar.com, Participate Energy and installers in 2026. Your quote will differ. US Power leads with Propel. Participate and Maxwell Power are the fallback options when a customer prefers them or Propel does not fit, such as a FICO under 660 or a utility district Propel does not serve.
Propel is the program US Power sells as its prepaid lease, though legally it is a prepaid energy services agreement paired with a loan. In all three programs, a third party owns the system for the first years and claims the Section 48E commercial tax credit. That owner passes part of the value to you as a lower upfront price. According to Solar.com, the owner must hold the system for at least five years to keep the credit, which is why every program delays ownership.
You never claim a tax credit yourself. The discount is baked into the price, whether you pay cash or finance the prepayment. Business owners can claim the credit at least through the end of 2027, per Solar.com, so the window is real but not permanent.
Propel builds the buyout price into your loan schedule. One California installer describes the system becoming yours after Year 5 with no extra step. pv magazine USA words it as a purchase option starting in the sixth year of operation. Those are likely the same moment, so confirm the exact date in your contract.
Participate works differently. Its program page says the lease runs 25 years initially, with a transfer option at fair market value after the first six years. Solar.com's September 2026 guide adds that the agreement lets the price fall as low as $0 but never below it. That can be great. It is also not a fixed number written into the contract.
Propel is a real loan. Solar-Advisors, an installer-affiliated referral site, reports a 660 minimum FICO and a UCC-1 filing on the equipment that shows up in a title search. At a sale, that filing must be assumed, paid off or subordinated.
Participate's program page says no FICO score or credit underwriting is required and that the agreement does not require a UCC lien on the home. A buyer can take over the lease with no credit check. If you finance the prepayment with a separate lender, that loan carries its own terms.
Maxwell Power is not our lead program in the Propel vs Participate decision, but it is a real alternative when neither fits, so it is worth understanding.
Maxwell Power is the new name for HDM Renewable Finance, rebranded in June 2026 according to pv magazine USA. You prepay roughly 70% of what buying a comparable system would cost, per Solar.com, using cash, a personal loan or a HELOC.
Maxwell advertises a six-year protection period covering production guarantees, monitoring and insurance. Its ownership option sits around Year 5 or 6 at market value. Solar.com's own article gives both numbers, so ask which one your contract uses.
You are prepaying for decades of power, so the company behind the agreement matters. As of October 2026, Fairtide Partners' total commitment to Maxwell projects reached $1.8 billion, reported by Pulse 2.0. Maxwell says it has powered about 20,000 homes with prepaid PPAs. Both are company figures, so treat them as signals, not guarantees.
If you are also weighing a monthly lease from a national installer, our comparison of Axia by Qcells vs Sunrun shows how those structures differ.
Under NEM 3.0, utilities pay very little for the solar you export. Solar.com notes that pairing a prepaid program with storage helps you avoid those low export rates. A prepaid structure pays for output up front, so you rely less on export credits to make the math work.
Peak pricing on most California plans runs 4 to 9 PM, exactly when solar fades. Read are batteries worth it for solar in California and our guide to the best SCE rate plan for solar owners before you size a battery.
SolSource expanded Propel in mid-2026 to LADWP and 16 other California utility districts, per NA Clean Energy. Installer tools still check eligibility by address and utility, so a neighbor's approval does not guarantee yours. Participate lists California among its 15 supported states, and Maxwell's prepaid PPA is active in California according to a 2026 Artemis announcement.
Here is an illustration, not a quote. Assume a solar-plus-battery system with a $40,000 cash price. Every row uses 8.99% APR over 25 years, Propel's published standard rate per Solar-Advisors, so the rows compare cleanly.
At 30% off, the monthly payment drops about $100 compared with financing the full price. That gap is the whole value of the program. Real lenders vary, and Participate's financing partners may use different terms, so run your own numbers in our solar calculator.
Prepayment is sized to what you use, so a wrong usage estimate means overpaying for years. Every US Power consultation starts with a real 12-month bill analysis, not a ZIP-code guess. That is how you learn whether a 30% discount on a system that is too large still costs you money.
Ask for the exact buyout formula, the earliest date and who appraises fair market value. Solar.com says Participate's buyout is set at the time you request it. A $0 estimate from a sales rep is not a contract term.
Solar.com warns that some lenders discovered they were not in first position and demanded full payment. If you finance, get written confirmation that your lender knows about the prepaid structure and accepts its lien position. Our financing options page explains how financing paths differ.
Solar United Neighbors, a consumer advocate, notes that prepaid customers may have less leverage if a system underperforms, because payment is already made. Ask how long the production guarantee lasts. One installer lists Propel's at 85% of estimated output for five years. Then read 5 hidden costs that can impact your California solar savings and our guide to buying a house with solar panels to see what buyers ask about.
All three programs can cut your upfront cost by roughly 20% to 40%, so the better question is which terms you can live with for a decade.
Whichever you pick, plan to stay at least six years. That is the Propel vs Participate decision in one line: certainty of the buyout price against freedom from credit checks and liens.
US Power leads with the Propel prepaid lease in California. We can also work on Participate or Maxwell Power if you prefer them or your eligibility calls for it, since approval depends on your credit, utility and equipment. Our CSLB-licensed consultants pair factory-direct Qcells pricing, 15% to 20% below market, with American-made Qcells panels, a 25-year comprehensive warranty and a 3 to 4 week install to PTO. If you want to see which program fits your usage, book your free 12-month bill analysis and we will run the numbers with you.
Prepaid solar is a contract first and a discount second, so read it that way.
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