PPA, Lease, or Own: Picking the Solar Ownership Model for Your Hold Period

Three ownership models cover almost every commercial solar project on real estate: you own the system, a third party owns it and sells you the power, or a third party owns it and pays you rent for the space. Installers tend to recommend whichever model their business is built around. The right answer depends on facts specific to you.

Model one: direct ownership

You buy the system — with cash, C-PACE, an equipment loan, or some combination — and you own the asset. You get the full electricity saving or revenue, you own the federal and state tax attributes, and you carry the operating and maintenance responsibility along with the performance risk.

Ownership produces the best economics when two conditions hold: you can actually use the tax attributes, whether directly or by transferring the credit for cash, and your hold period is long enough that the saving accrues to you rather than to the next owner. Where both hold, nothing else comes close, because you are not paying a third party's cost of capital or return requirement.

Ownership is the wrong answer when the tax attributes are stranded and you have no practical path to monetise them, when your capital is genuinely better deployed elsewhere, or when your firm has no appetite for operating a generating asset.

Model two: power purchase agreement

A developer finances, builds, owns, and operates the system on your property. You agree to buy the electricity it produces at a contracted rate, usually with an annual escalator, over a long term. Your capital outlay is nothing. Your saving is the spread between the contract rate and what you would otherwise pay the utility.

The PPA structure exists because it solves the tax problem. The developer has tax capacity, so the credits and depreciation are worth full value to them, and some of that value comes back to you as a below-utility rate. If you cannot use the attributes and do not want to transfer them, you are effectively paying someone to use them on your behalf — which is a rational trade.

The terms that matter most in a PPA are not the headline rate. They are the escalator, the term length, the assignment provisions, the removal and relocation obligations, the performance guarantee, and the purchase options. Each of those becomes a live issue in a sale.

• Escalator. A rate that steps up 2–3% annually against a utility tariff that may not can turn a below-market contract into an above-market one over a twenty-year term. Model the crossover point.
• Assignment. You need a clean right to assign the agreement to a buyer without the developer's unreasonable withholding of consent. Weak assignment language is a genuine impediment to a sale.
• Removal and relocation. If you need to replace the roof, who pays to take the array off and put it back? Silence here becomes an expensive argument in year twelve.
• Purchase option. A right to buy the system at defined points, at fair market value or a formula price, preserves optionality you will value if your tax position changes.
• Performance guarantee. Without one, production risk is yours in substance while the asset is theirs in form.

Model three: site lease

You lease roof or ground rights to a developer and collect rent. You do not buy the power — it goes to the grid, to a community-solar subscriber base, or to another offtaker. You have no capital outlay, no operating responsibility, no consumption obligation, and no tax attributes.

This is the cleanest structure when your own load is small relative to the available area, when the property's tenants have their own meters and you cannot capture the benefit of on-site generation, or when local net-metering and community-solar rules make grid-directed generation more valuable than on-site consumption.

The economics are modest — rent for space — but so is the complexity. And unlike a PPA, there is no consumption obligation to explain to a buyer; there is a lease, which real estate buyers understand natively.

The hold-period test

Here is the simplest way to cut through the sales material. Ask what happens to each structure on the day you sell.

Under ownership, you sell a property with lower operating expense. If a buyer capitalises that saving at your exit cap, you have converted the improvement into value, and the shorter your remaining hold the more of the benefit sits in that terminal value rather than in cash flow. Under a PPA, you sell a property with a long-term power contract attached, and the buyer prices that contract — favourably if it is below market with clean assignment terms, unfavourably if not. Under a site lease, you sell a property with an income-producing lease, which buyers handle routinely.

Sponsors with a defined three-to-five-year business plan often conclude that third-party ownership is the better trade, because it captures a modest benefit with no capital and no residual asset to explain. Sponsors holding for a decade or more almost always conclude the opposite. Both are correct for their own facts, which is the point.

One structure to be careful with

Be cautious about a PPA on an asset you are marketing for sale in the near term, signed before you have tested how buyers in your market treat it. The array improves the property's energy profile and possibly its marketability, but a twenty-year consumption obligation entered into weeks before going to market is a diligence item you have created for yourself, with no time to mitigate it. If a sale is imminent, either finish the analysis properly or let the buyer make the decision.