Lease vs. Loan vs. Cash: Which Solar Option is Best?

Last Updated: June 2026 • Based on EnergySage Market Intelligence, NREL Financial Analysis, and Lawrence Berkeley Lab Tracking the Sun Report

When you decide to go solar, the next question most people face is: how should I pay for it? You will likely hear about three options from solar installers and sales reps: pay cash, take out a solar loan, or sign a lease. Each one works very differently, and the choice you make has a bigger impact on your total savings than almost any other decision in the process.

This guide breaks down all three options with real numbers, honest pros and cons, and a clear recommendation for most homeowners based on your situation.

Side-by-Side Overview of All Three Options

Before diving into the details, here is a clear comparison of how all three financing options differ on the things that matter most.

Option 1: Cash Purchase

Paying cash for your solar system is the simplest financial path and delivers the highest total savings over the life of the system. You pay the full cost upfront, own the system outright from day one, and then receive all the financial benefits: the federal tax credit, any state incentives, and 100% of the electricity savings for 25 or more years. There are no monthly payments and no interest charges.

The main thing to consider with a cash purchase is opportunity cost. If you pay $20,000 cash for solar instead of investing it at 7% annual return, you are giving up roughly $107,000 in portfolio growth over 25 years. However, your solar system is simultaneously saving you $1,500 to $2,000 per year in electricity, which works out to $37,500 to $50,000 over 25 years at flat rates and significantly more when rising electricity rates are factored in. For most people with the cash available, solar is a competitive investment with a predictable, guaranteed return.

Option 2: Solar Loan

A solar loan lets you own your system and collect all the same benefits as a cash purchase, with one key difference: you finance the cost over 5 to 25 years and pay monthly installments. Most solar loans require no money down, and the monthly payment is typically close to or less than your previous electricity bill from the very first month.

The 30% federal tax credit becomes a powerful tool here. When you file your taxes in the year your system is installed, you receive a credit worth about $7,200 on a $24,000 system. Most financial advisors recommend applying that tax credit directly toward your loan principal to dramatically reduce your remaining balance and total interest paid.

Common Solar Loan Types

Option 3: Lease or Power Purchase Agreement (PPA)

A solar lease and a solar PPA are two slightly different versions of the same basic idea: a solar company installs panels on your roof, owns and maintains them, and charges you a monthly fee. With a lease, you pay a fixed monthly amount for the system regardless of how much it produces. With a PPA, you pay per kilowatt-hour for the electricity the panels actually generate, at a rate lower than your utility charges.

The appeal is simple. No money down, no ownership responsibility, and an immediate reduction in your monthly electricity bill. The problem is that you give up significant financial value in exchange for that simplicity. Because the solar company owns the system, they claim the 30% federal tax credit, any state tax credits, and all renewable energy certificates (RECs). They use those financial benefits to fund the leasing program and generate their own profit.

Why the Federal Tax Credit Changes Everything

The 30% federal Investment Tax Credit is the most valuable incentive in residential solar. On a $24,000 system it is worth $7,200. On a $30,000 system it is worth $9,000. This credit applies to the full installed cost: panels, inverter, racking, labor, permits, and battery storage.

The credit belongs to whoever owns the system when it is installed and activated. If you buy or finance the system, you own it and you get the credit. If you lease it, the solar company owns it and they get the credit. That single difference is worth thousands of dollars and is the primary reason a loan almost always beats a lease for homeowners who can qualify.

Real Numbers: 25-Year Cost and Savings Comparison

The following example uses a standard 8 kW solar system costing $24,000 gross, installed in a state with average electricity rates of $0.16 per kWh, producing 10,000 kWh per year. All three financing options are compared over 25 years.

The key takeaway from these numbers: A solar loan produces about $46,200 more in financial benefit than a lease over 25 years on the same system. The cash purchase produces about $11,000 more than the loan, representing the interest saved. The lease is not a bad deal in absolute terms, but it leaves a significant amount of money on the table compared to ownership.

How Each Option Affects Selling Your Home

Solar financing has a significant impact on what happens when you decide to sell your home. This is a factor many homeowners do not think about when they sign up but regret when they list their property.

Which Option Is Right for You?

The best financing option depends on your specific situation. Here is a practical guide based on common homeowner profiles.

Decision Guide: Pick Your Path

Frequently Asked Questions

Is a solar loan better than a lease?

For most homeowners who can qualify for a loan, yes. A solar loan gives you ownership, which means you keep the 30% federal tax credit worth $6,000 to $9,000 on a typical system. You also add approximately $4 per watt to your home's resale value. Over 25 years, a loan typically saves $15,000 to $30,000 more than a lease for the same system. The only scenario where a lease makes more financial sense is when you genuinely cannot qualify for a loan.

What credit score do I need for a solar loan?

Most solar lenders require a minimum credit score of 650 to 680 for a standard unsecured solar loan at reasonable rates. The best rates (below 6%) typically require a score of 720 or above. If your score is below 650, a HELOC using home equity may still be available, or you may need to explore a lease or PPA. Some solar companies offer programs for below-average credit, but rates will be significantly higher.

Can I switch from a lease to ownership later?

Yes, but it is not free. Most solar lease agreements include a buyout option after a set number of years. Buyout prices are typically the fair market value of the system at the time, which can range from $10,000 to $20,000 depending on the system age and original size. If you initially sign a lease and later want to own the system, ask for the buyout schedule at the time of signing so you know what you are committing to.

What happens to a solar loan when I sell my house?

If the loan is fully paid off, the system transfers to the buyer as a standard part of the home sale. If there is an outstanding balance, you have two main options. You can pay it off at closing from the sale proceeds, or you can negotiate with the buyer to assume the loan (which requires lender approval and is less common). Most sellers pay it off at closing and the net proceeds reflect the home value increase the solar system added.

Is a 25-year solar loan a bad idea?

A 25-year term keeps monthly payments low, which is helpful if cash flow is tight. But you will pay significantly more in total interest over 25 years than with a 10 to 15-year term. The best approach is to take the longer-term loan for the low monthly payment, apply your federal tax credit as a lump-sum principal payment in Year 1, and then pay extra toward principal whenever possible to shorten the effective loan life without being locked into a higher minimum payment.