HELOC vs Solar Loan: Which Is Right for Your Home
Written by HyreSolar Research Desk Primary-source research and fact checking
Quick answer
HELOC vs Solar Loan comes down to upfront cost, lifetime savings and how long you plan to stay in the home; here is each factor side by side.
A home equity line of credit (HELOC) comes from your bank, not your installer, so there is no dealer fee folded into the balance, and its interest may be deductible because solar is an improvement to the home.
The trade-offs: the rate is usually variable, closing takes longer, and your house secures the debt. A solar-specific loan is quick and arranged at the kitchen table, but the CFPB found its principal often carries a fee of 10 to 30 percent of the cash price.
Cost side by side
Installed prices as other publishers state them, gross of incentives. Each range is the median published low to the median published high across at least 12 dated sources, retrieved October 21–22, 2026; the source rows sit on the linked cost page.
| Option | Published range | Sources |
|---|---|---|
| Amount to borrow: typical installed system | $22,100–$27,500 | 14 dated |
No 30% federal credit is subtracted: Section 25D ended for expenditures after December 31, 2025.
HELOC vs solar loan, side by side
| HELOC | Solar-specific loan | |
|---|---|---|
| Who lends | Your bank or credit union | A lender arranged through the installer |
| Fee folded into principal | No dealer fee; ordinary closing costs may apply | Typically 10 to 30% of cash price (CFPB) |
| Rate | Usually variable, tied to an index | Stated APR typically 1 to 7%, often fixed (CFPB) |
| Collateral | Your home (a lien behind your mortgage) | Often a UCC fixture filing on the equipment |
| Interest deduction | Possible if you itemize: funds used to substantially improve the home (IRS Pub 936) | Generally no, unless the loan is secured by the home |
| Speed | Weeks: appraisal and underwriting | Often same day |
| Separation from installer | Full: installation contract stands alone | Financing and installation often bundled |
Sources: CFPB Issue Spotlight (Aug 2024), which notes home equity financing typically keeps the financing and installation contracts separate; IRS Publication 936.
Why lender separation matters
The CFPB singled out one structural difference: with home equity financing there is usually a clear separation between the financing contract and the installation contract.
With solar-specific loans, the installer often sells both, and the fee that pays for a low advertised rate goes into the principal.
Arriving with your own line of credit means the installer is quoting a cash price, which the CFPB’s advisory specifically recommends.
On taxes, read the condition carefully. IRS Publication 936 says home equity interest is deductible "only if the borrowed funds are used to buy, build, or substantially improve the taxpayer’s home," within the $750,000 debt limit, and only if you itemize.
Whether a rooftop system counts as a substantial improvement for you is a question for a tax professional; we do not assume it.
Savings over 25 years
The panels save the same either way; what differs is the total borrowing cost.
A HELOC on the cash price, repaid over a few years, often costs less in total than a solar loan carrying a 20 percent fee, even at a higher stated rate, because there is less principal.
The risk runs the other way if rates rise: a variable HELOC payment can climb, and a 25-year draw-and-repay schedule costs more interest than a fast payoff.
Compare the two on total dollars paid, not on rate: put the HELOC on the cash price, and the solar loan on its actual principal, into the loan calculator. If the solar loan principal exceeds the cash price, the dealer fee calculator isolates that fee.
When you sell, a HELOC is paid off from the proceeds like any home-secured debt. A solar loan with a fixture filing must be paid off or subordinated to the buyer’s mortgage, which Fannie Mae requires.
Which to choose if…
- 1You have equity and can repay within a few years
A HELOC usually costs less and keeps the installer quoting a cash price.
- 2You cannot accept a variable payment or a lien on your home
A fixed-rate solar loan, but only after you have the cash price and the fee in writing.
- 3You have little equity
Compare a personal or credit-union loan, or a lease.
- 4You have the cash
See cash vs loan.
When you are ready
Ready to explore solar for your home?
If you have done your research and want to speak with a solar professional, HyreSolar can help you explore available options.
Free, with no obligation: a person at HyreSolar reads your request and gets back to you about it. Matching with solar professionals is not live yet, so this is not a quote, and nothing is shared with anyone until you agree.
Keep learningQuestions
Is a HELOC better than a solar loan?
Is HELOC interest deductible for solar?
Do I still get the 30% credit with either?
Sources & retrieval dates
- CFPB, Solar Financing Market Issue Spotlight (August 2024) , Hidden fees typically 10 to 30 percent of the cash price, can exceed 50 percent; stated APRs typically 1 to 7 percent; terms of 8 to 25 years against typical repayment in 7 to 9 years; PPA escalators of 1 to 5 percent; home equity financing usually keeps financing and installation contracts separate. Retrieved 22 October 2026.
- CFPB consumer advisory: Steer clear of costly and complex loans for solar energy installation (August 2024) , Monthly payment that jumps after 18 months unless a payment matching the projected tax credit is made; ask the salesperson for the cash price; consider bank or credit union financing. Retrieved 22 October 2026.
- IRS Publication 936, Home Mortgage Interest Deduction (2025 returns) , Home equity loan and line interest deductible only if the funds buy, build or substantially improve the home securing the debt; $750,000 acquisition-debt limit. Retrieved 22 October 2026.
- Fannie Mae Selling Guide, B2-3-04 Properties with Solar Panels , Leased and PPA panel value excluded from appraised value; payments in the debt ratio; senior fixture filings must be subordinated. Retrieved 22 October 2026.
- Public Law 119-21 , Section 25D terminated for expenditures after December 31, 2025. Retrieved 22 October 2026.
HyreSolar does not install, finance or sell solar. This page is general information, not tax, legal or financial advice; terms, prices and rules vary by state, utility and contract.