Cash vs Loan vs Lease vs PPA: Solar Financing in 2026

The 2026 Financing Landscape

This is the comprehensive comparison guide I wish I'd had when I started helping homeowners with solar back in 2018. The financing landscape has shifted dramatically—and I've had to completely rethink some of my old recommendations.

There are four main options:

• Cash purchase: Pay upfront, own the system outright
• Solar loan: Finance the purchase, own from day one
• Solar lease: Fixed monthly payment, company owns the system
• PPA (Power Purchase Agreement): Pay per kWh produced, company owns the system

Before 2026, the answer was often straightforward: if you could afford it, cash or loan gave you the best returns thanks to the 30% federal tax credit. But the rules have changed.

Tax Credit Changes Everything

However, the commercial ITC under Section 48E remains active at 30% through December 31, 2027. This is the credit that solar companies use when they own systems through leases and PPAs.

How This Changes the Math

Let's look at a $30,000 system:

Cash Purchase

Paying cash for your solar system gives you complete ownership and the highest long-term ROI—eventually. But the upfront cost is significant, and in 2026, you're paying full price without the federal credit cushion.

How It Works

1. Pay the full system cost upfront (typically $20,000-$40,000)
2. You own the system immediately—panels, inverter, everything
3. Your electric bill drops to near zero (just grid connection fees)
4. All energy production and savings are yours
5. No monthly payments, no interest, no third parties

Pros

• Highest lifetime ROI: No interest or lease payments to erode savings
• Full ownership: Complete control over your system
• Home value boost: Owned systems add ~4% to home value
• Simple: No monthly payments, no loan, no third-party relationships
• State/local incentives: Many still apply to purchased systems

Cons

• No federal credit (2026+): You pay full price, no 30% back
• Large upfront cost: $20,000-$40,000+ tied up in your roof
• Opportunity cost: That money can't be invested elsewhere
• Maintenance responsibility: You handle any issues after warranty

Solar Loans

A solar loan lets you spread the cost over time while still owning the system. You get the benefits of ownership without the massive upfront payment—but you'll pay interest, and without the federal credit to offset costs, your total expense is higher than before.

How It Works

1. Apply for a solar loan (through installer, bank, or credit union)
2. Lender pays installer; you own the system from day one
3. Make fixed monthly payments (typically $150-$350)
4. Loan term is usually 10-25 years
5. Once paid off, you own the system free and clear

Pros

• $0 down: Get solar without depleting savings
• Own from day one: Build equity in your system
• Home value boost: Owned systems add property value
• Fixed payments: Predictable monthly cost
• State/local incentives: Still apply to purchased systems

Cons

• No federal credit (2026+): Financing full price, not reduced price
• Interest costs: Adds 30-80% to system cost over loan life
• Dealer fees: Hidden 15-30% markups common in installer financing
• Monthly payment obligation: Must pay even if system underperforms
• Credit impact: Loan appears on credit report

Solar Lease

With a solar lease, a third-party company installs and owns the system on your roof. You pay a fixed monthly amount to use the energy it produces. The company claims the federal tax credit and passes savings to you through lower lease rates.

How It Works

1. Solar company installs system at no upfront cost to you
2. Company owns and maintains the system
3. You pay fixed monthly lease payment (typically $80-$200)
4. Lease term is usually 20-25 years
5. At end, you can renew, buy the system, or have it removed

Pros

• Federal credit benefit: Company's 30% credit = lower rates for you
• $0 upfront: No down payment required
• Maintenance included: Company handles repairs and monitoring
• Performance guarantee: Most leases guarantee minimum production
• Predictable costs: Know exactly what you'll pay each month

Cons

• No ownership: You don't own the system or build equity
• Lower total savings: Company keeps significant portion of value
• Long contract: 20-25 year commitment is hard to exit
• Complicates home sales: Buyer must assume lease or you buy it out
• Escalators: Some leases increase 2-3% annually
• No home value boost: Leased systems don't add property value

Power Purchase Agreement (PPA)

A PPA is similar to a lease, but instead of a fixed monthly payment, you pay per kilowatt-hour (kWh) of electricity the system produces. Think of it as buying electricity from your roof at a rate lower than the utility.

How It Works

1. Solar company installs system at no upfront cost
2. Company owns and maintains the system
3. You buy the electricity it produces at a set rate (e.g., $0.10/kWh)
4. You still buy grid power when solar isn't producing enough
5. Contract term is typically 20-25 years

Pros

• Federal credit benefit: Company's 30% credit = lower rates for you
• $0 upfront: No down payment required
• Pay for what you use: If system underperforms, you pay less
• Maintenance included: Company handles all repairs
• Immediate savings: PPA rate typically 10-30% below utility rate

Cons

• No ownership: You don't own the system
• Variable bills: Payment changes with production and usage
• Long contract: 20-25 year commitment
• Escalators: Rate may increase 1-3% annually
• Complicates home sales: Must transfer or buy out
• No home value boost: PPAs don't add property value

Side-by-Side Comparison

Example: $30,000 System Over 25 Years

*Lease/PPA estimates assume $160/month average. Actual costs depend on your specific contract. Note how PPA/lease have become more competitive now that they receive federal benefits you can't get.

Home Value Impact

How you finance solar significantly affects what happens to your home's value and how easy it is to sell.

Owned Systems (Cash or Loan)

Studies consistently show owned solar adds 3-4% to home value. The National Renewable Energy Laboratory (NREL) found buyers pay a premium of approximately $4 per watt of installed capacity. That means a 10 kW system adds roughly $40,000 to your home's value.

• Buyers see owned solar as an asset
• No lease transfer complications
• If you have a loan, you can pay it off at sale or transfer to buyer
• Appraisers can assess the system's value

Leased/PPA Systems

Leased and PPA systems are more complicated when selling:

• Buyer must qualify: The new owner needs to pass the solar company's credit check
• Some buyers walk away: Not everyone wants a 15-year lease obligation
• Buyout option: You can purchase the system and sell it with the home
• No value add: Most appraisers don't add value for leased systems
• May slow sale: Extra paperwork and negotiation

Which Is Best for You?

Choose Cash If:

• You have $20,000-$40,000+ available without depleting emergency funds
• You plan to stay in your home 10+ years
• You want maximum long-term savings and control
• Your state has strong incentives that offset the lost federal credit
• You're comfortable handling maintenance after warranty expires

Choose a Loan If:

• You want ownership benefits without large upfront cost
• You have good credit (700+) to get reasonable rates
• You plan to stay in your home at least 10 years
• You can find a loan without dealer fees (credit union, bank)
• Your state incentives help offset the no-federal-credit situation

Choose a Lease If:

• You want predictable, fixed monthly payments
• You don't qualify for good loan rates
• You want maintenance and monitoring included
• You're okay with the home sale complications
• You value the federal credit benefit passed through to you

Choose a PPA If:

• You want to pay only for what you use
• You have high, consistent energy usage
• You prefer the company being incentivized for production
• You're okay with variable monthly costs
• You want maintenance included and federal benefit passed through

Questions to Ask Yourself

1. How long do I plan to stay in this home?
2. Do I have cash available without sacrificing emergency funds?
3. What's my credit score and what loan rates would I qualify for?
4. Does my state have incentives that help offset the lost federal credit?
5. How important is it to me to own the system?
6. Am I comfortable handling maintenance, or do I want it included?
7. How do I feel about a 20-25 year contract?