What a Credit Union Solar Loan Costs
USC Credit Union’s GoGreen Loan is a useful, current benchmark for what a credit union actually charges for solar. As of August 16, 2026, its published rate table runs from 2.99% APR on a 1 to 2 year term, through 3.49% on 2 to 3 years, 3.99% on 4 to 5 years, 4.49% on 6 to 10 years, 5.49% on 11 to 15 years, up to 6.99% on a 16 to 20 year term. Loan amounts go up to $50,000, or $75,000 when battery storage is added alongside solar, with terms extending to 15 years, or 20 years for a combined solar and storage loan. USC Credit Union does not publish a hard credit score cutoff, stating instead that “borrowers with a wide range of credit scores may qualify.”
A separate promotional tier inside the same GoGreen program goes further: 0% APR for up to 10 years, or 2% APR for 10 to 15 years, for income qualified households in disadvantaged communities that install a heat pump alongside solar.
Why the National Lenders’ Headline Rate Is Misleading
Put side by side, credit union rates do not look dramatically cheaper on paper. Star One Credit Union posted 6.25% to 8.00% APR as of March 2026, and USC Credit Union advertises rates “as low as 5.94% APR with autopay.” National specialized solar lenders, GoodLeap, Mosaic, Sunlight Financial, and GreenSky among them, advertise a headline range as wide as 1.99% to 36% APR. For a well qualified borrower at FICO 720 or above, realistic national-lender pricing runs 6% to 10% APR; a borrower in the 660 to 719 range should expect 10% to 16% APR.
The number that actually separates the two categories does not appear on the rate sheet. National lenders carry an average dealer fee of about 22% of the loan amount, rolled directly into the principal rather than billed separately, adding $5,700 or more to a typical $26,000 system loan. That 22% figure matches a second, independent figure already used elsewhere on VA Horizon’s own site, a reasonable sign it reflects a real, consistent industry number rather than one aggregator’s estimate.
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Set the dealer fee next to a credit union loan and the comparison changes. Credit unions carry no dealer fee, no origination fee, and no prepayment penalty. A national lender’s advertised rate can look competitive with, or even lower than, a credit union’s headline APR and still cost more in total once that 22% fee is added to the balance being repaid. A homeowner comparing two loan offers on interest rate alone is comparing the wrong number.
Where Credit Score Still Shapes the Deal
Credit unions are not the only option that will work with a thinner credit file, but score still matters more with national lenders. Sunlight Financial, one of the national lenders in this comparison, sets 650 FICO as the minimum for a standard loan, with its best APR tiers reserved for borrowers above 700, per figures already published on VA Horizon’s own qualification guidance for solar consults. A credit union’s willingness to work with “a wide range of credit scores,” without publishing a hard floor, is a genuine structural difference for a borrower closer to that 650 line.
What Happens to a National Lender’s Loan When the Home Sells
One more difference worth raising before a homeowner signs: GoodLeap’s own FAQ states that assuming a solar loan when a home is sold is discretionary, not automatic. GoodLeap “reserve[s] the right to decline the assumption if the new homeowner doesn’t meet our criteria,” meaning a buyer’s own credit has to clear GoodLeap’s bar before the loan can transfer with the house. That is a real underwriting event sitting downstream of the sale, not a formality, and it is worth naming for a homeowner who expects to move before the loan term ends.
How to Frame This Comparison for a Homeowner
The honest version of this comparison does not declare one category the winner. It puts the real numbers next to each other: a credit union’s fee-free structure against a national lender’s broader marketing reach and higher headline-rate ceiling, offset by a real dealer fee most borrowers never see itemized. A homeowner who asks a credit union or community bank for a solar-loan quote alongside a national lender’s proposal, and asks specifically whether a dealer fee is rolled into the national offer, is asking the one question that actually separates the two options.
| Term | USC Credit Union GoGreen APR |
|---|---|
| 1 to 2 years | 2.99% |
| 2 to 3 years | 3.49% |
| 4 to 5 years | 3.99% |
| 6 to 10 years | 4.49% |
| 11 to 15 years | 5.49% |
| 16 to 20 years | 6.99% |
Rates effective August 16, 2026, per USC Credit Union’s published GoGreen Loan program terms; terms above 15 years require solar paired with battery storage.
What this means for you
- USC Credit Union prices solar loans from 2.99% APR on a 1 to 2 year term up to 6.99% APR on a 16 to 20 year term, with no published hard credit score minimum and no dealer fee.
- National lenders advertise 1.99% to 36% APR, but realistic pricing runs 6% to 16% APR depending on credit, plus an average dealer fee of about 22% of the loan rolled into the principal.
- The dealer fee, not the headline rate, is usually the number that decides which loan costs less over the life of the system.
- GoodLeap discloses that loan assumption at a home sale is discretionary, not automatic, a real underwriting event for a homeowner who expects to move before the term ends.
Sources
The external data in this guide draws on the sources below. Figures described in the text as estimates or industry triangulations are directional and are not attributed to a single dataset.
- USC Credit Union, GoGreen Loan program rates and terms
- Green Energy Calculators, solar panel loans, best lenders and rates for 2026
- GoodLeap, frequently asked questions, on loan assumption at a home sale