US residential solar · 2026 data

Solar Panel Loans: Best Lenders and Rates for 2026

Q: "What credit score do I need for a solar panel loan?"

"Most specialized solar lenders set a minimum FICO score of around 620–640, though borrowers below 680 should expect rates above 12% APR. Credit unions typically require 680 or above for their best rates. Borrowers above 720 qualify for the most competitive products, with APRs in the 6%–8% range from credit unions and direct lenders like LightStream. Your debt-to-income ratio matters nearly as much as your raw score."

Q: "How much can I borrow for a solar panel loan?"

"Loan amounts from major solar lenders typically range from $5,000 to $100,000, covering the vast majority of residential systems. NREL data puts average installed costs at $26,000 to $35,000 before incentives for an 8–10 kW system. SoFi and some credit unions accommodate larger amounts for solar-plus-battery projects, which routinely run $40,000 to $55,000 installed."

Q: "Is a solar loan better than a solar lease in 2026?"

"It depends on your credit and equity position. SEIA projects roughly 69% of 2026 residential installs will be third-party owned via lease or PPA, partly because those arrangements still qualify for the commercial solar tax credit. If you can access a no-fee loan at 7% or below through a credit union or HELOC, ownership typically delivers better long-term returns. If your only loan option carries a 25% dealer fee, a transparent lease may cost less overall."

Q: "Are solar loan interest payments tax-deductible?"

"Standard unsecured solar loans do not generate tax-deductible interest. If you finance solar through a HELOC and itemize deductions on your federal return, the interest may be deductible under IRS home improvement rules. Always confirm eligibility with a tax advisor, as deductibility depends on individual circumstances. State-level deductions vary — check your state revenue department for current guidance on any additional credits."

Q: "How long does a solar loan application take?"

"Online and installer-partnered lenders typically provide a credit decision within minutes to 24 hours, with funding in 3 to 7 days after installation is confirmed. Credit union loans often take 5 to 10 business days due to more detailed underwriting. HELOC approval can take 2 to 6 weeks given the need for a home appraisal and title work. If your installation is time-sensitive to capture a state rebate deadline, factor lender processing time into your planning early."

SAVE

$0+

Over 25 Years

$16,800 Cost after ITC

9.3 yrs Payback

8.0 kW Typical system

Most homeowners need:

20–24 panels typical
8.0 kW average system
$16,800 after tax credits
9.3 year payback

✓ Updated monthly ✓ NREL data ✓ Reviewed by solar experts ✓ IRS tax credit included

Updated April 8, 2026 · 11 min read ·By Mark Sullivan ·Reviewed by Green Energy Calculators Editorial Team

Calculate My Savings View State Incentives

Without solar vs with solar

25-year cost comparison for a $300/month US electric bill.

Without solar

25-year utility cost

$75,000

Rates rise ~3% per year (EIA avg.)

With solar

Net system cost

$16,800

After 30% federal ITC

Your savings

Difference

+$58,200

Estimated lifetime advantage

Author Mark Sullivan

Reviewed by Green Energy Calculators Editorial Team

Last updated Apr 8, 2026

Sizing formula kW = Annual kWh ÷ (Peak Sun Hours × 365 × 0.82)

The average residential solar system in the United States costs $30,505 before incentives — and with the federal residential solar tax credit (Section 25D) having expired on December 31, 2025, how you finance that system now matters more than ever. A poorly structured solar loan can add $5,000 to $8,000 to your total cost through hidden dealer fees alone, wiping out years of electricity savings. The good news is that the range of financing options has never been wider, and borrowers who understand the landscape can still lock in competitive rates well below 8% APR.

Solar loans remain the most common path to ownership in 2026, used by roughly 31% of new residential solar customers according to SEIA data. Unlike leases or power purchase agreements, a loan lets you own the system outright and claim any state tax incentives or utility rebates that may still be available in your area. The trade-off is that you carry the full cost of the system on your personal balance sheet — which is why choosing the right loan structure is a decision worth spending real time on. Before you sign anything, use a solar loan calculator to model different rate and term combinations against your projected electricity savings.

This guide covers the main lender categories available in 2026, the rates you should realistically expect, the hidden fee structure that catches most homeowners off guard, and the alternatives — particularly HELOCs and credit union loans — that often beat advertised solar loan rates on total cost.

How Solar Loan Rates Actually Work in 2026

Solar loan APRs are advertised in a range running from as low as 1.99% to as high as 36%, but the number you see in the installer’s proposal rarely tells the full story. Qualified borrowers with a FICO score above 720 can realistically target rates in the 6% to 10% range from reputable lenders, while borrowers in the 660–719 range should expect 10% to 16% APR. Below 660, options narrow and rates climb sharply.

The more important number — the one most homeowners miss — is the dealer fee. When a solar installer brings a financing partner to the table, the lender pays the installer a percentage of the loan amount (typically 20% to 30%) as a fee for delivering the customer. That fee does not disappear; it gets rolled into the loan principal you’re asked to repay. On a system with a cash price of $26,000, a 25% dealer fee turns your loan balance into $32,500 — and you pay interest on the full inflated amount for the life of the loan. Industry data from NuWatt Energy’s 2026 lender comparison shows the average solar loan carries a 22% dealer fee, adding over $5,700 to a typical system cost.

This is why the advertised APR is the wrong place to start your comparison. A loan with a 1.99% interest rate and a 25% dealer fee will cost significantly more over a 20-year term than a plain-vanilla personal loan at 8.5% with zero fees — because you’re borrowing $6,500 more in the first place. Always ask your installer for two figures before agreeing to any financing: the cash price and the financed price. The difference between those two numbers is the dealer fee. If your installer cannot or will not provide both figures clearly in writing, treat that as a serious red flag.

Repayment terms for solar-specific loans typically run 10, 15, or 20 years. Longer terms reduce monthly payments but increase total interest cost substantially — a $30,000 loan at 8% runs $363 per month over 10 years but only $251 per month over 20 years, yet the 20-year version costs roughly $9,800 more in total interest. Knowing your break-even point on loan cost versus electricity savings is the starting point for any honest comparison of solar financing options.

The Best Solar Lender Types for 2026

Not all solar lenders offer the same product. The market broadly divides into four categories, each with different rate structures, fee habits, and qualification criteria.

Specialized solar lenders — companies like GoodLeap, Mosaic, Sunlight Financial, and GreenSky — are the most common financing partners offered through solar installers. They have streamlined approval processes and offer $0-down loans with terms up to 25 years. The catch is they almost universally use the dealer fee model described above. LightStream, a division of Truist Bank, is a notable exception: its Solar and Sustainable Home Improvement loan is unsecured, carries no origination fee, and posts rates from 3.99% to 16.99% APR depending on creditworthiness and term. LightStream funds directly to the borrower rather than the installer, which removes the dealer fee incentive entirely.

Credit unions consistently offer some of the most competitive no-fee solar financing available. Star One Credit Union posts solar loan APRs from 6.25% to 8.00% as of March 2026, with no origination fees, no prepayment penalties, and no closing costs. USC Credit Union has offered rates as low as 5.94% APR with an autopay discount. Local credit unions in states with active solar markets — including California, Colorado, and Massachusetts — frequently post rates 1% to 2% below what national specialized lenders offer, without the dealer fee inflating the principal. For more on this topic, see our guide to Best States for Solar ROI in 2026.

National banks and online lenders such as Wells Fargo occasionally offer home improvement loans applicable to solar, while personal loan products from SoFi, Upgrade, and LendingClub cover solar installations and are worth comparing for borrowers who want a simple, fee-transparent structure. SoFi offers large loan limits useful for combined solar-plus-battery projects — systems that routinely run $40,000 to $55,000 installed — with no required origination fees.

PACE financing (Property-Assessed Clean Energy) remains available in several states and attaches repayment to your property tax bill rather than your personal credit. PACE requires no minimum credit score, which makes it accessible for borrowers who cannot qualify elsewhere — but the effective cost is often high and a PACE lien on your title can complicate mortgage refinancing or a future home sale. Treat PACE as a last resort, not a first choice.

Horizontal bar chart comparing solar loan APR ranges across four lender types in 2026 — **Solar loan rates vary dramatically by lender type in 2026.** Credit unions post the lowest average APRs (5.94%–8.00%), while installer-partnered lenders carry a hidden dealer fee of 20–25% that adds $5,700+ to a typical $26,000 system regardless of the advertised rate. Source: SEIA, EnergySage, Star One Credit Union 2026.

The HELOC Alternative: When It Beats a Solar Loan

For homeowners with meaningful equity in their property, a Home Equity Line of Credit can be the most cost-effective way to finance solar in 2026 — even though the headline interest rate is higher than what installer-partnered lenders advertise. The math works because a HELOC charges no dealer fee. You borrow against the actual cash price of the system, not an inflated financed price.

Consider a concrete example using an 8 kW system quoted at $26,000 cash. An installer-partnered solar loan at 1.99% APR with a 25% dealer fee funds at $32,500 over 20 years. A HELOC at 7.5% APR on the actual $26,000 cash price costs less in total payments and clears the debt roughly 5 to 10 years sooner, depending on how aggressively you repay during the draw period. Industry analysis published by NuWatt Energy in early 2026 puts the HELOC total payment in this scenario at approximately $43,384 over 15 years — still less than many 20-year dealer-fee solar loans despite carrying a rate 5.5 percentage points higher.

HELOC interest used for a qualifying home improvement may also be tax-deductible under IRS rules if you itemize deductions, adding a further financial advantage. The primary drawbacks are real: HELOCs are secured by your home (defaulting puts your property at risk), rates are typically variable and can rise with market conditions, and qualifying requires documented equity and a stronger credit profile than most unsecured solar loans demand. If you plan to sell the home within three to five years, any outstanding HELOC balance must be paid off at closing, which limits its usefulness for shorter-horizon homeowners.

Current HELOC rates from major banks and credit unions in 2026 generally run between 6.5% and 8.5% APR for borrowers with good credit, according to data tracked by EnergySage. Homeowners in states with high home values and active equity markets — New York, Washington, and Oregon come to mind — are particularly well positioned to use HELOC financing effectively. If your home has appreciated significantly and you carry good credit (typically 680+ FICO), the conversation with your bank about a HELOC is worth having before you accept the financing terms offered by your solar installer.

To figure out whether your projected energy savings justify the financing cost under either structure, run the numbers with our solar savings calculator before committing to any loan.

Loan Clauses That Can Cost You Thousands

Getting a solar loan approved is the easy part. The harder work is reading the terms carefully enough to avoid structures that cost homeowners thousands in unexpected payments.

The balloon payment trap. Many installer-partnered solar loans are structured around the assumption that you will apply the old 30% federal tax credit to the loan principal within 18 months of origination. Monthly payments during the first 18 months are calculated on a reduced balance — the net-of-tax-credit amount. But Section 25D expired at the end of 2025. If your loan was written before that change, or if your installer is still quoting under the old model, you may face a sharp payment increase after month 18 if you cannot make the full “incentive payment.” Ask your lender explicitly what happens to your monthly payment if you do not reduce principal by roughly 30% within the first 18 months.

Prepayment penalties. Some solar loan products — particularly older contract structures still in use by certain regional installers — include early termination or prepayment fees. Ask for this clause in writing, and if a penalty exists, negotiate it out before signing. Star One Credit Union explicitly advertises zero prepayment fees as a competitive differentiator, which signals how common the opposite arrangement is among installer-partnered lenders.

UCC-1 fixture filings. Most specialized solar lenders file a UCC-1 lien on the solar equipment as security for the loan. This is not a lien on your property itself, but it appears during a title search and can create friction during a mortgage refinance or a home sale. Make sure your solar installer has experience coordinating with mortgage companies if you anticipate refinancing within the loan term. The origination fees on installer-partnered loans can also range from 1% to 10% of the loan amount — on a $32,500 financed balance, that alone can add $325 to $3,250 to your upfront cost.

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Comparing Solar Loan Options by State and System Size

The best solar loan for your situation depends heavily on where you live and how large a system you are installing. NREL data places the average residential system at 8 to 10 kW, with installed costs ranging from $26,000 in competitive markets to $38,000 or more in states with limited installer competition. That cost range means the difference between a $25,000 and a $40,000 loan — and that gap compounds significantly over a 15- or 20-year term.

State-level electricity rates drive the savings side of the equation. In Hawaii, where residential electricity averages over 38 cents per kWh according to EIA data, a financed solar system can still achieve a payback period under 8 years even after loan interest is factored in. In Louisiana, where rates sit closer to 10 cents per kWh, the same loan structure may produce a payback period exceeding 16 years — long enough that a lease or PPA with lower upfront cost risk may be more rational for many households. For state-level payback data with the ITC applied, see our guide to Solar Panel Payback Period by State.

State incentive programs also interact directly with loan math. Several states maintain active rebate programs, net metering policies, or state income tax credits that remain available to system owners regardless of the federal credit expiration. Florida homeowners benefit from a full property tax exemption on added home value from solar, which doesn’t reduce loan cost directly but improves the total cost-of-ownership picture. States with strong net metering policies — such as Illinois — continue to make loan-financed ownership attractive even in 2026.

Before locking in a loan term, it pays to understand your state’s net metering rules and how export credits will offset your electricity bill over the repayment period. Running a detailed projection with our solar payback calculator using your local utility rate and the actual financed system cost — including any dealer fee — is the most reliable way to determine whether a 10-, 15-, or 20-year loan term fits your financial timeline.

Frequently asked questions

Direct answers for US homeowners — sized for a $150/month electric bill.

What credit score do I need for a solar panel loan?

Most specialized solar lenders set a minimum FICO score of around 620–640, though borrowers below 680 should expect rates above 12% APR. Credit unions typically require 680 or above for their best rates. Borrowers above 720 qualify for the most competitive products, with APRs in the 6%–8% range from credit unions and direct lenders like LightStream. Your debt-to-income ratio matters nearly as much as your raw score.

How much can I borrow for a solar panel loan?

Is a solar loan better than a solar lease in 2026?

Are solar loan interest payments tax-deductible?

How long does a solar loan application take?

$150/month electric bill by state

System size and payback vary by electricity rate and sun hours — see your state.

CA California $150/mo · 29.4¢/kWh TX Texas $150/mo · 13.8¢/kWh FL Florida $150/mo · 13.5¢/kWh AZ Arizona $150/mo · 13.2¢/kWh NC North Carolina $150/mo · 12.8¢/kWh NY New York $150/mo · 22.4¢/kWh MA Massachusetts $150/mo · 24.5¢/kWh CO Colorado $150/mo · 14.2¢/kWh

Compare all 50 states for $150/mo →

Popular state solar guides

Electricity rates and incentives vary — see data for your state.

CA California 29.4¢/kWh · 5.8h sun TX Texas 13.8¢/kWh · 5.6h sun FL Florida 13.5¢/kWh · 5.7h sun AZ Arizona 13.2¢/kWh · 6.5h sun NC North Carolina 12.8¢/kWh · 5.2h sun NY New York 22.4¢/kWh · 4.3h sun MA Massachusetts 24.5¢/kWh · 4.2h sun CO Colorado 14.2¢/kWh · 5.5h sun

View all 50 states →

Popular utility companies

Solar rules and net metering vary by utility — not just by state.

PG&E California Duke Energy NC · FL · Midwest Florida Power & Light Florida Oncor Texas APS Arizona Georgia Power Georgia

Methodology & data sources

Calculation method: System size uses NREL PVWatts derate factor (0.82). Costs based on SEIA 2026 installed cost ($2.75–$3.20/W). Payback uses net cost after 30% federal ITC (IRC Section 25D). Savings assume full-retail net metering unless noted.

Official sources: EIA state electricity rates · NREL PVWatts · Energy.gov ITC guide · DSIRE incentives · SEIA market data · IRS Publication 5695.

All figures are estimates for educational purposes — not tax, legal, or investment advice. Consult a licensed installer and CPA for your situation.