Solar lease vs. loan vs. cash: what will you actually pay?

A cash purchase pays for installation upfront. A loan spreads the purchase price and financing costs over time. With a lease, you pay for use of the equipment; with a power purchase agreement, or PPA, you pay the provider for electricity generated under the contract.

A zero-down offer can still create a substantial long-term obligation. Ask what you are buying, who owns the system and which documents govern the payments before comparing the first monthly figure.

Keep expected production, household usage and utility rates consistent across alternatives. Otherwise a more optimistic production model may look like a better financing product.

For each option, list upfront spending, annual payments, remaining utility costs and responsibilities for service or replacement. Show the cost over the full agreement and over the period you realistically expect to stay in the home. These totals describe cash commitments, not a discounted investment analysis.

A lease payment or PPA energy price may rise under a contractual escalator. Ask for every year’s payment or rate. PPA invoices can also vary with production, even if the energy price is fixed.

For illustration only, a $150 monthly lease payment increasing 3% each year becomes about $196 in year ten and $263 in year twenty. Across twenty years, those scheduled lease payments total approximately $48,367, excluding utility charges and other costs. This is arithmetic, not a typical or recommended contract.

Ask what happens if you sell in year five or ten. A lease or PPA may require transfer approval or a buyout; a loan may have its own payoff or security requirements. A prospective home buyer is not automatically obligated to accept your arrangement.

Get the relevant contract language and any available buyout schedule. Do not treat a future purchase option as a guaranteed bargain when its price will only be determined later.

Ownership does not mean all repairs are free, and third-party ownership does not mean every problem is covered. Identify responsibility for labor, removal for roof repairs, equipment replacement, monitoring and insurance.

Read any production guarantee separately from the payment agreement. The contract should explain the remedy for underproduction, not simply state a forecast beside a monthly price.

Cash avoids loan interest but uses money you may need for other purposes. A loan preserves some upfront cash but adds financing obligations. A lease or PPA may suit a preference for third-party ownership if the price and contract terms work for you.

For a new 2026 installation, do not include the former federal homeowner credit in the purchase case. Third-party tax treatment is a separate question and does not make the homeowner personally eligible for that credit. Ask for actual offers; there is no universal winner.

Examples on this page illustrate the comparison method; they are not installation quotes, financing offers or guaranteed savings. Use your current tariff and written proposal for a personal decision.