Solar Loan Guide: How to Finance Solar With Zero Down
By Solar Cost Predictor Team · February 10, 2026 · 8 min read
Solar loans have become the most popular way to go solar in the US — surpassing both leases and cash purchases in recent years. The reason is simple: you get the financial benefits of ownership (increased home value, long-term savings) with no money out of pocket at signing. Note: the federal residential tax credit that used to be one of those ownership benefits ended for systems placed in service after Dec 31, 2025 — see our guide to what changed.
But not all solar loans are created equal. Dealer fees, interest rate structures, and prepayment terms vary dramatically between lenders. This guide explains what to look for.
Types of Solar Loans
There are three main types of solar loans, each with different pros and cons:
Secured Solar Loans (Home Equity)
Home equity loans and HELOCs use your home as collateral. They typically offer the lowest rates (4.5%–7%) and longest terms (up to 20 years), and interest may be tax-deductible. The downside: you are putting your home on the line and approval requires significant equity.
Unsecured Solar Loans
These are the most common. Offered through solar installers via specialty lenders (GoodLeap, Mosaic, Sungage), they require no collateral. Rates run 5.99%–9.99% for borrowers with good credit (680+). Terms range from 5–25 years. Most include a dealer fee paid by the installer to the lender.
FHA Title I / PowerSaver Loans
Government-backed loans for energy efficiency. Available to homeowners with limited equity. Rates are competitive but maximum loan amounts are lower ($25,000 for FHA Title I). Approval can take longer than private loans.
Solar Loan Rates and Terms (2026)
Here is what to expect from major solar lenders in 2026:
| Lender | APR Range | Terms | Dealer Fee |
|---|---|---|---|
| GoodLeap | 5.99%–9.99% | 5–25 years | Yes (varies) |
| Mosaic | 5.49%–9.49% | 10–25 years | Yes (varies) |
| Sungage | 4.99%–8.99% | 10–25 years | Yes (varies) |
| Lightstream | 6.99%–12.99% | 2–12 years | No |
| Credit Union HELOC | 5.5%–7.5% | 10–20 years | No |
Important note on dealer fees: Specialty solar lenders charge installers a dealer fee (typically 10–30% of the loan amount) in exchange for offering low advertised rates. This fee is usually built into your system price. Always ask your installer for the cash price vs. financed price to see the spread.
Why "Tax Credit Bridge" Loans No Longer Work as Advertised
For years, most solar loans were structured assuming you'd apply a 30% federal tax credit refund as a lump-sum payment in year 1 or 2 — sometimes marketed as a "tax credit bridge" or "advance payment" loan, with reduced payments for the first 12–18 months.
That Mechanism No Longer Applies
The federal residential tax credit (Section 25D) that this structure depended on ended for any system placed in service after December 31, 2025. If a lender or installer offers you this kind of promotional loan structure in 2026, there's no tax refund coming to make the "bridge" payment — ask exactly what lump sum you're expected to pay at the end of the promotional period, since some of these loans carry a balloon payment if nothing offsets the principal.
Example: a $20,000 system on a 25-year loan at 6.99% runs about $141/month for the full term now, with no reduced promotional period assumption built in — compare that real number against any "promotional rate" quote before signing.
How to Choose the Right Solar Loan
Key questions to ask before signing a solar loan:
- What is the total cost of the loan? Compare total interest paid, not just monthly payment.
- Is there a prepayment penalty? Most solar loans have none, but verify.
- What is the dealer fee? Ask your installer for the all-cash price vs. financed price — the difference is the effective dealer fee you are paying.
- What happens if I sell my home? Most solar loans can be paid off from sale proceeds. Some have transfer provisions.
- Is the rate fixed? Nearly all specialty solar loans are fixed rate. Confirm before signing.
Frequently Asked Questions
What credit score do I need for a solar loan?
Most specialty solar lenders require a minimum credit score of 640–680. The best rates (under 6.99%) typically require 720+. Some lenders offer products for scores as low as 600 at higher rates.
Do solar loans show up on my credit report?
Yes — unsecured solar loans appear as personal loans on your credit report and affect your debt-to-income ratio. This is important to know if you plan to apply for a mortgage or other financing soon.
Should I use a solar loan or pay cash?
If your loan rate is lower than your expected investment returns (typically 7–10%), paying cash is better purely financially. But many homeowners prefer to preserve liquidity. Solar loans with rates under 7% often make sense when factoring in the opportunity cost of cash.