PPA, Site Lease, or Solar Ownership?

Choose the right commercial solar structure for your property.

Commercial solar is not one-size-fits-all, and neither is the way a project is financed.

For some property owners, direct ownership makes the most sense. Others may prefer a Power Purchase Agreement, or PPA, that reduces the need for a large upfront capital investment. In other cases, the real opportunity may be to lease suitable roof or land space to a solar developer and create a new source of property revenue.

That is why the financial conversation should begin with the property itself.

What are you trying to accomplish? Do you want to own the energy asset? Preserve capital? Generate lease revenue from unused space? Improve long-term energy economics? The right answer depends on your property, organization, financial goals, and the structure of the project.

Understanding the major commercial solar financing options is a useful first step.

Direct Solar Ownership: When You Want to Own the Asset

Direct ownership is the most straightforward structure. The property owner or organization purchases the solar system, either with available capital or through commercial financing, and owns the asset.

For organizations that expect to hold a property for many years, ownership can provide a high level of control over the system and its long-term economics. Depending on the project and current programs, ownership may also allow the organization to benefit from available tax incentives, solar revenue, or reductions in purchased electricity.

But ownership also requires more upfront planning. The organization needs to consider capital availability, financing, project timing, tax position, and how the system fits into broader facility or real-estate goals.

For some businesses, that control is attractive. For others, keeping capital available for core operations may be more important. That is where third-party structures can become useful.

PPA: Buying the Energy Instead of the Solar System

A Power Purchase Agreement changes the nature of the investment.

Instead of buying the solar equipment, the customer buys electricity generated by a third-party-owned system under a long-term agreement.

This can appeal to organizations that want access to solar without the full upfront cost of purchasing the system. The project owner typically handles the ownership and development of the solar asset, while the customer agrees to purchase the energy it generates according to the terms of the contract.

The important distinction is that a PPA is fundamentally an energy-purchasing structure.

The customer is not primarily investing in the solar equipment. The value comes from the terms of the electricity agreement and how those terms compare with the organization’s existing or expected energy costs.

For commercial property owners, this can be useful when energy strategy is a priority but preserving capital is equally important.

Site Lease: Turning Suitable Property Space Into a Revenue Opportunity

A site lease works very differently from a PPA.

Instead of purchasing solar electricity, the property owner makes suitable roof or land space available for a solar project and receives lease payments for the use of that space.

For real estate owners, this can shift the conversation from energy savings to property utilization.

A roof, parcel of land, or other suitable area that is not currently producing value may be able to support a solar project. In that scenario, the opportunity is less about owning the system and more about turning underused property into a potential revenue-producing asset.

This can be particularly relevant for commercial real estate owners, warehouses, industrial properties, agricultural landowners, and other organizations with large usable spaces.

A site lease is therefore best understood as a property-revenue structure, rather than an energy-purchasing structure.

PPA vs. Site Lease: Why the Difference Matters

Because both structures can involve little or no large upfront capital investment from the property owner, PPAs and site leases are sometimes confused.

But the financial relationship is completely different.

With a PPA, the customer purchases electricity from a system owned by someone else.

With a site lease, the property owner is paid for providing suitable space for someone else’s solar project.

That distinction matters because the right structure depends on the property owner’s goal.

If the priority is controlling energy costs, a PPA may be worth evaluating. If the priority is monetizing unused roof or land, a site lease may be more relevant. And in some cases, direct ownership may create more value than either option.

The right comparison is not simply “which one is cheapest?” It is “which structure best supports the property’s long-term strategy?”

Solar Leases: Another Third-Party Ownership Option

Solar leases add another option to the mix.

In a typical solar lease, the system is owned by a third party and the customer makes lease payments for use of the equipment.

This is different from a site lease, where the property owner receives lease payments for the use of their space.

That difference in direction of payment is simple but important.

With a solar lease, the customer is paying for access to the system. With a site lease, the property owner is being paid for access to the property.

For organizations comparing commercial solar options, understanding that distinction early can prevent confusion later in the process.

C-PACE: A Long-Term Financing Tool for Commercial Properties

C-PACE, or Commercial Property Assessed Clean Energy, can be another useful financing option for eligible commercial properties.

C-PACE is designed to help property owners finance qualifying energy and building improvements over a longer term. For some projects, that can make it easier to incorporate solar into a broader capital-improvement plan without relying entirely on a conventional upfront purchase.

C-PACE can be especially relevant when solar is being considered alongside roofing, electrical upgrades, energy-efficiency improvements, or other major property investments.

As with all financing structures, eligibility and terms vary. C-PACE should be evaluated in the context of the specific property, project, and local program requirements.

Commercial Financing: Preserving Flexibility

Traditional commercial financing may also play a role in solar ownership.

For organizations that want to own the system but do not want to pay the full project cost upfront, financing can help spread the investment over time.

This can provide a middle ground between direct cash purchase and third-party ownership.

The organization still retains ownership of the asset, but the capital structure may be more manageable.

For many commercial owners, the question becomes less about whether solar is affordable and more about which financing structure best aligns with the organization’s broader investment strategy.

Solar Value Is Not Always a 1:1 Utility-Bill Offset

One of the most important things to understand about commercial solar is that value does not always come from simply reducing the electric bill dollar-for-dollar.

Some projects are designed primarily to reduce purchased electricity. Others may generate revenue through utility or incentive programs. Some may create value through lease payments. Battery storage may help manage demand-related costs. Tax benefits or financing structures may also affect the economics.

In certain programs, solar production may be compensated through a buy-all/sell-all structure rather than directly offsetting a building’s electricity consumption.

That means the right question is not always:

“How much will solar lower my bill?”

A better question is:

“How does this project create value for this property?”

That shift in thinking is especially important for commercial real estate owners and organizations evaluating multiple project structures.

How to Decide Which Structure Fits Your Property

The best starting point is to define what you actually want the project to accomplish.

If the goal is to own the energy asset and capture long-term project economics, direct ownership or commercial financing may be worth exploring.

If preserving upfront capital is the priority, a PPA, solar lease, C-PACE, or financing arrangement may be more appropriate.

If the property has suitable unused roof or land and the main objective is generating property revenue, a site lease could be a stronger fit.

And if energy-cost control is the primary goal, it may make sense to evaluate solar ownership, a PPA, battery storage, demand charges, and utility rate structure together.

No single option is automatically best. The right solution depends on how the property operates, how the organization thinks about capital, and what the long-term goal actually is.

What to Prepare Before Comparing Commercial Solar Options

A productive financing conversation starts with good information.

Before evaluating ownership, PPAs, site leases, or financing, it helps to have a clear picture of the property and its energy use.

That usually includes recent utility bills, the property address, information about the building or land, typical operating hours, planned renovations or expansions, ownership structure, approximate project budget, and long-term goals for the site.

For real estate owners, it is also helpful to think about how long the property is expected to remain in the portfolio and whether roof, land, or other site areas are likely to change in the future.

The clearer the property picture, the easier it becomes to compare financial structures in a meaningful way.

Start With the Goal, Not the Financing Product

Commercial solar financing should not begin with a product name.

It should begin with a question:

What are you trying to accomplish with this property?

That answer may point toward ownership. It may point toward a PPA. It may reveal that a site lease creates more value than energy savings. Or it may show that solar needs to be evaluated alongside battery storage, C-PACE, or other capital improvements.

The right commercial solar strategy connects the technical design with the financial structure from the beginning.

For commercial property owners, nonprofits, agricultural organizations, affordable housing operators, and real estate investors, that means evaluating the project as part of a broader property and energy strategy—not as a standalone equipment purchase.

Commercial Solar Financing FAQs