Solar loan vs lease vs cash in 2026

In 2026, cash purchase and PPA deliver the best outcomes for most homeowners — cash for those with the liquidity, PPA for $0-down buyers — because the 30% federal residential solar tax credit (IRC §25D) expired December 31, 2025, stripping the biggest advantage loan borrowers previously held. Solar companies that own leased and PPA systems may still claim the commercial §48E Investment Tax Credit and pass part of that value through as lower rates, which makes third-party ownership more competitive than it has been in years.

Why 2026 is a turning point

Before §25D expired, the credit returned 30% of your total installed cost — $6,600 on a $22,000 system. Cash buyers applied it as a direct tax reduction. Loan borrowers used the standard playbook: borrow the full amount, receive the credit in April, then pay down principal — effectively financing only 70%. That playbook is gone for new 2026 installations.

What remains is the commercial clean energy Investment Tax Credit, §48E. Solar companies that own systems on residential rooftops — leasing companies and PPA providers — can still claim it. Competition among providers tends to push that advantage into lower monthly lease payments or below-market per-kWh PPA rates.

State incentives — property tax exemptions, state income tax credits, utility rebates, net metering — are separate from §25D and vary by location. Verify what’s available through your state energy office before signing anything.

Cash purchase

You pay the full installed cost upfront, own the system outright, and carry no monthly payment, no interest, and no third-party contract. You handle maintenance, though residential systems need little beyond occasional cleaning and an inverter replacement around year 10–15 (roughly $1,000–$2,000).

In 2026, you receive no federal tax credit. State incentives may still apply, but the federal §25D benefit is gone, which extends payback compared to every prior year of the credit’s existence.

Cash still delivers the strongest long-term net position of any option if you have the liquidity and plan to stay in the home long enough to reach payback. You eliminate interest entirely, own an asset that may raise home value, and keep every dollar of electricity savings. The constraint is having $20,000–$30,000 available to deploy this way.

Solar loan

A solar loan lets you own the system while spreading payments over 10–25 years. Rates for well-qualified borrowers in 2026 typically run 5.99%–9.99% APR depending on term, lender type (secured home equity versus unsecured solar-specific), and credit profile. Some manufacturer-backed programs offer promotional rates below that range.

Here is where 2026 changes the math most sharply: you are financing 100% of the installed price. The old loan-plus-credit-paydown strategy — where April’s tax refund immediately reduced principal — is gone. You pay interest on the full amount for the full term, which increases total interest paid and pushes out breakeven.

A loan still works if you want ownership without the upfront capital, particularly with a short term and a competitive APR. Before borrowing, check how much do solar panels cost? to confirm the quote you are financing is reasonable.

One trap: some solar loans carry hidden dealer fees rolled into the price, raising your effective rate by 2–3 percentage points even when the stated APR looks attractive. Ask for total interest paid over the life of the loan, not just the monthly payment.

Solar lease

A lease gives you the electricity a solar system produces in exchange for a fixed monthly payment — typically $80–$150/month for a standard residential system — without owning the panels. The solar company installs, owns, monitors, and maintains the system for the contract term, usually 20–25 years.

Because the company owns the system, it claims the §48E credit. That benefit, combined with installer competition, tends to push lease rates below what the grid charges for the same electricity. Most leases carry a 1–3% annual escalator, so your payment rises each year — easy to overlook when the first-year number looks attractive.

You do not own the system at contract end, though most agreements give you the option to buy at fair market value, renew, or have it removed at no cost. Leases can complicate a home sale because the buyer must either qualify to assume the contract or you must buy it out before closing. Factor that in if you expect to sell within the next decade.

Power purchase agreement (PPA)

With a PPA, you pay per kilowatt-hour for electricity your panels produce at a rate negotiated below your utility’s retail price. Typical PPA rates in 2026 run $0.07–$0.12/kWh versus a national average grid rate of around $0.15–$0.17/kWh. You pay only for actual production, not a flat monthly fee.

The solar company owns the system and claims §48E, same as with a lease. Because you pay for production rather than a flat fee, you do not pay full price in months when clouds or shading reduce output. Like leases, PPAs include escalator clauses and require close review of buyout and contract transfer terms.

Before §25D expired, PPAs were less competitive because cash and loan buyers captured a 30% federal rebate quickly. In 2026, that advantage is gone for buyers, narrowing the gap. A PPA now offers a real cost advantage for homeowners who want $0 down and $0 maintenance and are comfortable not owning the system.

Comparing your four options

Option	Upfront cost	Who owns the system	Federal incentive (2026)	Est. 25-yr total payments	Est. 25-yr net position
Cash purchase	~$22,000	You	$0 — §25D expired	$22,000	~+$12,500 gain
Loan (20 yr, 6.99%)	$0	You	$0 — §25D expired	~$41,000	~-$6,500*
Lease ($120/mo flat)	$0	Solar company	Provider claims §48E	~$36,000	~-$1,500
PPA ($0.09/kWh, 2%/yr escalator)	$0	Solar company	Provider claims §48E	~$26,500	~+$8,000 gain

*The loan outcome improves if utility rates rise 3%+ per year; at that rate, 25-year electricity offset exceeds $50,000 and the net position turns positive. All figures are estimates based on the worked example below; your actual numbers will differ.

Worked example: a $22,000, 7 kW system

Assume a 7 kW system installed for $22,000 in a location averaging 4.5 peak sun hours per day — a reasonable figure for a mid-latitude US city.

Gross annual output (before losses): 7 kW × 4.5 hr × 365 days = 11,498 kWh†
Net annual output after 0.80 system performance ratio: ~9,200 kWh

†Gross figure only. Real-world losses — inverter conversion efficiency, heat derating on hot days, wiring resistance, and panel soiling — reduce output by roughly 15–20%. Always confirm whether any production estimate you receive already applies the 0.80 derate. Skipping it overstates production by about 20% and distorts every payback and savings figure that follows.

At $0.15/kWh, 9,200 kWh offsets approximately $1,380/year in electricity costs. Use the solar savings calculator with your actual rate and usage for a tighter projection. Over 25 years at a flat rate, that is roughly $34,500 in total electricity offset — conservative, since most utility rates trend higher over that span.

Cash: Pay $22,000 upfront, receive no federal credit. Twenty-five-year electricity offset: ~$34,500. Net gain: ~$12,500. Simple payback at flat rates: approximately 16 years.

Loan: Finance $22,000 at 6.99% over 20 years. Monthly payment: ~$170. Monthly electricity savings at $0.15/kWh: ~$115. Cash-flow negative by roughly $55/month for 20 years. Total paid over the loan term: ~$41,000. At flat electricity rates, 25-year net: roughly -$6,500 versus not going solar. At 3%/year utility rate growth, that position flips to a meaningful gain.

Lease: $0 down, $120/month for 25 years totals $36,000. Against $34,500 in electricity offset, net: roughly -$1,500. No ownership, no maintenance cost, no large capital outlay.

PPA: $0 down, $0.09/kWh on 9,200 kWh = $828/year initially. With a 2%/year escalator, total payments over 25 years: roughly $26,500. Net estimated gain: ~$8,000 — with no ownership stake and no upfront investment.

These are illustrative estimates. Get itemized quotes from licensed installers and verify your local net metering policy, state incentives, and actual system output before committing to any option.

How to choose

Cash works if you have the liquidity and plan to stay at least 15–17 years. Payback takes longer than in any year §25D was in effect, but cash still delivers the highest net lifetime savings and the cleanest ownership path.

A loan makes sense if you want ownership, qualify for a competitive rate, and can tolerate negative cash flow during the loan term. Shorter terms (10–12 years) and rates below 7% APR improve the numbers substantially. Scrutinize any loan with a dealer fee structure — it may look cheap monthly but cost significantly more overall.

A lease suits homeowners who want lower electricity costs, zero capital outlay, and zero maintenance responsibility and are comfortable not owning the system. Understand the escalator clause from day one and map out what happens if you sell before the contract ends.

A PPA is often the best $0-down option in 2026 specifically because the provider benefits from §48E — an advantage that was not as decisive when cash buyers had a 30% federal credit. You pay only for production, which provides a natural hedge against underperformance. Read the escalator and buyout terms before signing.

Whatever you choose, collect at least three itemized quotes that break out equipment, labor, permitting, and financing costs separately. Evaluate total lifetime cost — not just the monthly payment. Verify state and local incentives with your state energy office; the federal credit is gone, but your state may still offer programs worth thousands of dollars. To decide whether solar makes financial sense for your home before picking a financing method, start at are solar panels worth it?.