C&I Solar: Lease, Loan, or PPA
A solar lease, a PPA, and a loan are three structurally different things. The right one is determined before a term sheet ever lands on your desk. Here is how to sequence the decision.
Who this is for
- ■Plant managers and facility directors evaluating a solar proposal
- ■CFOs and operations executives at Midwest manufacturers
- ■K-12 districts, municipalities, and nonprofit hospital operators
- ■Healthcare and retail chain operators with a five-figure monthly electric bill
- ■Anyone who has a solar term sheet in front of them right now
Should we finance our solar project with a PPA, a lease, or a loan, and which structure is actually available to us?
Utility-scale and residential solar have established financing channels. C&I sits in the middle: too small to attract institutional tax equity, too large for a standard bank construction loan. That structural gap is the starting point for every conversation about a solar lease, loan, or PPA at your facility.
Financing availability in this segment depends on who owns the site, who leases it, and who is buying the electricity. Those can be one entity or three. And it depends heavily on the credit profile of the party paying for the power. Smaller organizations carry higher perceived risk simply because they lack the credit rating of a large, well-established company, and that can constrain your options before you ever reach a term sheet.
27%of this guide, read. The rest of it is below.
- 02 The mechanism PPA, lease, and loan, side by side
A Power Purchase Agreement is an arrangement where a third-party developer owns, operates, and maintains the system. You site it on your property and buy the electricity it produces for a set period. You are buying the output, not the equipment. The rate is typically at or slightly below your retail rate.
PPA rates can be fixed, but many contracts include an annual escalator, commonly in the 1% to 5% range. That escalator accounts for system efficiency loss over time, maintenance cost increases, and anticipated increases in grid electricity prices. Terms run from 6 years to 25 years. You pay only for what the system produces.
A solar lease looks similar: a third party owns and maintains the system. Under a lease, you pay a fixed monthly amount regardless of what the system produces. If you want budget certainty, that is the appeal. If your load fluctuates seasonally, a PPA usually provides better value because you pay for actual production.
A loan means you own the system. You capture the federal Investment Tax Credit and depreciation directly. For taxable entities with the balance sheet capacity and appetite to own operating assets, direct ownership can produce the strongest lifetime economics, but it also transfers performance risk, O&M obligations, and technology risk onto you. It is not automatically the best answer.
Structure Who owns the system How you pay Who gets the tax benefits PPA Third-party developer Per kWh produced Developer or tax equity investor Solar lease Third-party developer Fixed monthly payment Developer or tax equity investor Loan / direct ownership You Debt service on the loan You, if you are taxable or can use direct pay The PPA envelope6yearsShortest PPA term25yearsLongest PPA term1%Escalator low end5%Escalator high endA PPA is a long contract with a rate that usually moves each year. Both ranges have to fit your facility plan.Before any economic modeling, work through the threshold questions. These determine which structure is even available to you, and which one your organization can actually capture value from.
- 1 Are you tax-exempt or taxable? Municipalities, K-12 districts, and nonprofit hospitals historically could not directly use the Investment Tax Credit, which is why third-party structures existed for them. Under the Inflation Reduction Act, tax-exempt entities can now often use direct pay to claim the ITC themselves on an owned system, which materially changes the analysis.
- 2 Does your state permit third-party PPAs? Indiana does not have a clear statutory framework authorizing third-party PPAs. Confirm your legal exposure with counsel before pursuing that structure.
- 3 Do you own or lease the property, and for how long? A long PPA is a real property encumbrance. If your organization is likely to consolidate or relocate facilities, that contract follows the property.
- 4 What is your credit profile? Financing availability is tied to the creditworthiness of the electricity purchaser.
- 5 Do you have a reporting obligation that requires REC ownership? Hosting a solar system does not automatically entitle you to claim renewable energy use.
- 6 Is your load stable year-round or highly seasonal? A facility largely vacant in July interacts with a production-based PPA very differently than one running three shifts.
- 03 What it does to you The threshold questions that pick the structure
Before any economic modeling, work through the threshold questions. These determine which structure is even available to you, and which one your organization can actually capture value from.
- 1 Are you tax-exempt or taxable? Municipalities, K-12 districts, and nonprofit hospitals historically could not directly use the Investment Tax Credit, which is why third-party structures existed for them. Under the Inflation Reduction Act, tax-exempt entities can now often use direct pay to claim the ITC themselves on an owned system, which materially changes the analysis.
- 2 Does your state permit third-party PPAs? Indiana does not have a clear statutory framework authorizing third-party PPAs. Confirm your legal exposure with counsel before pursuing that structure.
- 3 Do you own or lease the property, and for how long? A long PPA is a real property encumbrance. If your organization is likely to consolidate or relocate facilities, that contract follows the property.
- 4 What is your credit profile? Financing availability is tied to the creditworthiness of the electricity purchaser.
- 5 Do you have a reporting obligation that requires REC ownership? Hosting a solar system does not automatically entitle you to claim renewable energy use.
- 6 Is your load stable year-round or highly seasonal? A facility largely vacant in July interacts with a production-based PPA very differently than one running three shifts.
The structure decision almost always gets treated as a financial optimization problem: which one has the better NPV. That matters. But the more common mistake is operators who start modeling the economics before they have answered the threshold questions. Weeks get spent comparing twenty-year projections on a PPA their state does not legally permit, or a loan structure that requires a tax credit their organization cannot use.
A long PPA or lease also deserves more respect than it gets in most sales conversations. A retail chain with an evolving store footprint, or a municipality considering building consolidations: a long-term solar contract on a property you might not occupy at year fifteen is a serious liability if you have not modeled the exit.
What the pitch says What the contract actually means No upfront capital cost. You take on a multi-decade obligation and a property encumbrance, with buyout and assignment terms that decide what happens if you move. Predictable energy pricing. Fixed under a lease; under a PPA, often escalated annually between 1% and 5%. You will be solar-powered. Only if the contract explicitly allocates the RECs to you. Otherwise the developer keeps them. One simple bill. Two bills if the system does not cover 100% of your load. You still pay the utility for the shortfall. - 04 The trap What operators consistently underweight
The structure decision almost always gets treated as a financial optimization problem: which one has the better NPV. That matters. But the more common mistake is operators who start modeling the economics before they have answered the threshold questions. Weeks get spent comparing twenty-year projections on a PPA their state does not legally permit, or a loan structure that requires a tax credit their organization cannot use.
A long PPA or lease also deserves more respect than it gets in most sales conversations. A retail chain with an evolving store footprint, or a municipality considering building consolidations: a long-term solar contract on a property you might not occupy at year fifteen is a serious liability if you have not modeled the exit.
What the pitch says What the contract actually means No upfront capital cost. You take on a multi-decade obligation and a property encumbrance, with buyout and assignment terms that decide what happens if you move. Predictable energy pricing. Fixed under a lease; under a PPA, often escalated annually between 1% and 5%. You will be solar-powered. Only if the contract explicitly allocates the RECs to you. Otherwise the developer keeps them. One simple bill. Two bills if the system does not cover 100% of your load. You still pay the utility for the shortfall. Once the threshold questions are answered, the leverage is in the contract language. Structure availability is set by your state and your tax position. Structure value is set by the specific terms you negotiate on rate, escalator, RECs, assignment, and exit.
RateFixed or escalated
Ask whether the PPA rate is fixed or escalated. If escalated, get the percent and the index in writing.RECsAllocation is contractual
If a compliance obligation depends on verifiable REC ownership, the contract must explicitly allocate the RECs to you. Otherwise the developer keeps or sells them.ExitAssignment and buyout
Confirm the buyout schedule and the assignment provisions. This is what governs your options if you sell or vacate the property.Load fitCoverage and second bill
Understand what percent of your load the system is sized to cover, and how the second bill from the utility will behave for the shortfall.The order to work the decisionDo not compare term sheets until the structure question is settled. - 05 Your leverage What to confirm before you sign
Once the threshold questions are answered, the leverage is in the contract language. Structure availability is set by your state and your tax position. Structure value is set by the specific terms you negotiate on rate, escalator, RECs, assignment, and exit.
RateFixed or escalated
Ask whether the PPA rate is fixed or escalated. If escalated, get the percent and the index in writing.RECsAllocation is contractual
If a compliance obligation depends on verifiable REC ownership, the contract must explicitly allocate the RECs to you. Otherwise the developer keeps or sells them.ExitAssignment and buyout
Confirm the buyout schedule and the assignment provisions. This is what governs your options if you sell or vacate the property.Load fitCoverage and second bill
Understand what percent of your load the system is sized to cover, and how the second bill from the utility will behave for the shortfall.The order to work the decisionDo not compare term sheets until the structure question is settled. Decision matrixWhen a third-party structure fits, and when it does not
✓ A third-party PPA or lease fits when- You are tax-exempt and have not yet confirmed direct pay eligibility on an owned system
- You have no capital available and need cash flow positivity from day one
- Your state permits the structure your proposal is built on
- Your load is variable enough that paying only for what is produced beats a fixed lease payment
- You hold a long-term interest in the property that covers the contract term
✗ Direct ownership by loan fits when- You are a taxable entity that can directly capture the ITC and depreciation
- The project is large enough that tax equity transaction costs are justified
- You want full control over performance, maintenance vendors, and REC disposition
- Your state restricts or prohibits third-party PPAs and a lease is not the right economic fit
- You are willing and able to carry performance and O&M risk in exchange for lifetime economics
- What is our tax status, and if we are tax-exempt, have we evaluated whether IRA direct pay lets us claim the ITC on an owned system before defaulting to a third-party structure?
- Does our state permit third-party PPAs, and if we are in Indiana, have we confirmed that with counsel?
- If the proposal in front of us includes a PPA, does the contract explicitly allocate the RECs to us, and does that matter for any compliance obligation we have?
- What does our facility footprint look like over the contract horizon: are there consolidations or lease expirations that would make a long-term solar contract a liability?
- Questions for your morning huddle
- What is our tax status, and if we are tax-exempt, have we evaluated whether IRA direct pay lets us claim the ITC on an owned system before defaulting to a third-party structure?
- Does our state permit third-party PPAs, and if we are in Indiana, have we confirmed that with counsel?
- If the proposal in front of us includes a PPA, does the contract explicitly allocate the RECs to us, and does that matter for any compliance obligation we have?
- What does our facility footprint look like over the contract horizon: are there consolidations or lease expirations that would make a long-term solar contract a liability?
The one thing to rememberThe right financing structure for your solar project is determined by your tax position, your state's regulatory environment, your property tenure, and your reporting obligations. Not by which proposal lands on your desk first.
Before you compare a single term sheet, work through the 6 questions threshold questions with your CFO and counsel. Only then start modeling the economics on the structures that survive.
The Energy Decision BlueprintKnow if the numbers actually pencil out before you sign anything.
A written second opinion on the project in front of you, whether that is a rate change, new equipment, or a renewable installation.
- 01A short call, to figure out quickly whether we can actually be helpful. If we can't, we'll say so on the spot.
- 02We pull the data, your bills, your rate structure, vendor proposals, project specs.
- 03You get the verdict in writing: whether the payback will materialize, and the opportunities or risks nobody has raised.
Get a Blueprint at blueprint.tac-nrg.com Free for Indiana-based operations spending five figures or more a month on electricity. No obligation. You keep the write-up either way.what is the difference between a solar PPA and a solar lease
Both put a third-party developer in ownership of the system on your property. The difference is how you pay. Under a PPA, you pay per kWh the system actually produces, typically at or slightly below your retail rate, often with an annual escalator between 1% and 5%. Under a lease, you pay a fixed monthly amount regardless of production. PPAs tend to fit variable or seasonal loads. Leases fit organizations that want budget certainty.
how long is a commercial solar PPA contract
PPA term lengths typically run from 6 years on the short end, which is the point at which available tax benefits are fully realized, to as long as 25 years. That long tail is the reason property tenure and exit provisions matter as much as the headline rate. A long contract on a property you might not occupy at year fifteen is a real liability.
what is the difference between a solar PPA and a solar lease
Both put a third-party developer in ownership of the system on your property. The difference is how you pay. Under a PPA, you pay per kWh the system actually produces, typically at or slightly below your retail rate, often with an annual escalator between 1% and 5%. Under a lease, you pay a fixed monthly amount regardless of production. PPAs tend to fit variable or seasonal loads. Leases fit organizations that want budget certainty.
how long is a commercial solar PPA contract
PPA term lengths typically run from 6 years on the short end, which is the point at which available tax benefits are fully realized, to as long as 25 years. That long tail is the reason property tenure and exit provisions matter as much as the headline rate. A long contract on a property you might not occupy at year fifteen is a real liability.
can a school district or municipality use the solar tax credit
Historically, tax-exempt organizations like municipalities, K-12 districts, and nonprofit hospitals could not directly use the federal Investment Tax Credit, which is why third-party PPA and lease structures existed for them. Under the Inflation Reduction Act, tax-exempt entities can now often use direct pay to claim the ITC on an owned system. That materially changes the analysis and should be evaluated before defaulting to a third-party structure.
do I own the RECs under a solar PPA
Not automatically. Hosting a solar system does not entitle you to claim renewable energy use. Under most PPA structures, the developer retains or sells the Renewable Energy Certificates unless the contract explicitly allocates them to you. Under a lease, RECs are typically not tracked at all. If your compliance obligation depends on verifiable REC ownership, the contract has to address it upfront.
why would I have two electricity bills with a solar PPA
If the on-site system does not meet 100% of your site's electric load, the utility still supplies the shortfall and bills you for it. So you receive a PPA invoice for the electricity the panels produced and a utility invoice for everything else. It is not a defect, but it is an administrative and reconciliation reality that operators consistently underweight when they compare a PPA to their current single utility bill.
how fast can a commercial solar project be installed once the contract is signed
Once an SPPA contract is signed, a typical installation can usually be completed within 3 months to 6 months. The contract negotiation, the threshold-question work, and the interconnection process are usually the longer parts of the timeline, not the physical installation itself.