Best Solar Financing Options 2026: Loans, Leases and More
- Cash purchase gives the best 25-year return but requires upfront capital.
- Solar loans are the best financing option — you own the system and build equity.
- Leases and PPAs are not available for off-grid systems — only grid-tied.
- Home equity loans offer the lowest interest rates for homeowners with equity.
- Without the federal ITC in 2026, the financing decision is simpler — focus on lowest total interest cost.
Financing options at a glance
| Option | Own the system? | Upfront cost | Available for off-grid? | Best for |
|---|---|---|---|---|
| Cash purchase | Yes | Full cost | Yes | Best total return |
| Solar loan | Yes | $0–low | Yes | Best if financing needed |
| Home equity loan/HELOC | Yes | $0 | Yes | Lowest interest rate |
| Personal loan | Yes | $0 | Yes | No home equity needed |
| Solar lease | No | $0 | Grid-tied only | Not recommended |
| PPA | No | $0 | Grid-tied only | Not applicable off-grid |
Cash purchase
Paying cash for your off-grid solar system gives you the maximum financial return. No interest payments, full ownership from day one, and every dollar of electricity savings goes directly to you. On a $12,000 system, avoiding a 7% loan saves approximately $2,900 in interest over 5 years.
Best for: Anyone with available savings. Even if you could earn 4–5% in a savings account, the 25-year electricity savings typically provide a better return than keeping the money invested at low risk.
Solar loans
Solar-specific loans are offered by Mosaic, Sunlight Financial, GreenSky and others. Key features:
- Designed specifically for solar installations
- Terms of 5–25 years; rates typically 5–12% APR in 2026
- You own the system — eligible for any remaining state incentives
- Some lenders offer "dealer fee" loans where the installer pays a fee to offer 0% financing — the system price is typically inflated to compensate
Home equity loan / HELOC
If you have home equity, a home equity loan or HELOC typically offers the lowest interest rate available for solar financing — often 6–8% in 2026, and the interest may be tax-deductible if funds are used for home improvement.
- Home equity loan: Fixed amount, fixed rate, fixed monthly payments. Predictable and simple.
- HELOC: Revolving credit line. Draw what you need, pay interest only on what you use. More flexible but variable rate.
- Risk: Your home is collateral. If you default, you could lose your home. Only appropriate if your finances are stable.
Personal loans
Unsecured personal loans don't require home equity but typically carry higher rates (8–15% APR). Good option for:
- Renters or owners with little equity
- Smaller systems ($2,000–$8,000) where the interest cost is manageable
- People who want financing without risking their home
Loan comparison calculator
Why leases and PPAs don't work for off-grid
Solar leases and power purchase agreements (PPAs) are only available for grid-tied systems connected to a utility. The financing company owns the panels, which feed power into the grid, and the utility billing structure is what makes the economics work. Off-grid systems have no utility connection and no net metering — there's no mechanism for a third party to monetise the power. If you're building an off-grid system, your only options are cash or a loan.
The off-grid financing decision tree
- Do you have savings equal to the system cost? → Cash purchase. Best financial outcome.
- Do you have home equity and stable finances? → HELOC or home equity loan. Lowest interest rate.
- Do you need unsecured financing? → Solar loan or personal loan. Compare total interest cost, not just APR.
- Is the system under $5,000? → Consider 0% promotional credit card (12–18 months) if you can pay it off in time.
Frequently asked questions
Can I finance an off-grid solar system with a mortgage?
If you're building a new home with off-grid solar, you can include the solar system in your construction loan or mortgage. This gives you the lowest possible interest rate (mortgage rates) for the solar system. For an existing home, a cash-out refinance can accomplish the same thing if rates are favorable.
Is it worth financing solar if rates are high?
Run the numbers: if your monthly loan payment is less than your current electricity bill (or generator cost), financing makes sense even at moderate rates. Use our ROI calculator to compare financed vs cash purchase scenarios.
Do solar loans affect my credit score?
Yes — like any loan, a solar loan appears on your credit report. Hard inquiries during application temporarily lower your score, and the loan increases your debt-to-income ratio. Make all payments on time and the loan will have a positive long-term impact on your credit history.