What to Review Before Signing a Commercial Solar Agreement

A commercial solar agreement should be evaluated the same way you would evaluate any long-term asset, lease, financing instrument, or building-level obligation.

The system may reduce operating costs. It may improve the building’s energy profile. It may create access to tax incentives, depreciation, or long-term utility savings. But the agreement itself matters as much as the equipment on the roof.

The real question is not whether commercial solar can work. It can. The question is whether the proposed structure yields better financial and operational outcomes for your building over the full term of the agreement.

That requires more than a production estimate and a projected monthly savings number. It requires reviewing how the agreement affects ownership, financing, future sale, roof work, interconnection, utility compensation, tax treatment, and exit options.

Commercial Solar Agreements Are Long-Term Building Decisions

Commercial solar is not a one-time equipment purchase, unlike many building upgrades. Most agreements create obligations that run for 20 years or more. During that time, the building may be refinanced, leased, renovated, sold, or transferred.

That does not make commercial solar risky by default. It does mean the agreement should be reviewed in the context of the building’s broader financial and operational plans.

Before signing, the owner should understand:

• How the system is owned

• How the energy savings are calculated

• How tax incentives are captured

• How the agreement transfers during a sale

• How roof access and roof replacement are handled

• How production risk is allocated

• How early termination or buyout is calculated

• How interconnection costs are assigned

A strong commercial solar proposal should make those answers clear before the agreement is executed.

Roof Leases Deserve Careful Review

If the project involves a PPA or third-party-owned structure, the solar provider may need roof rights for the term of the agreement. That creates a property-level issue, not just an energy issue.

The lease or site-control agreement should be reviewed for how it affects future transactions. Buyers, lenders, and attorneys will look closely at any agreement that encumbers the property. Some agreements transfer cleanly. Others create additional approval steps, assignment issues, or due diligence friction.

Roof work is another practical concern. If the roof needs to be repaired or replaced during the term of the agreement, the contract should specify who coordinates the system's removal and reinstallation, who pays for it, how quickly the work must be completed, and how lost production is handled during downtime.

These are not minor details. They are the kinds of terms that determine whether the agreement remains manageable over time.

Escalators Change the Economics

Many commercial solar agreements include an annual rate escalator. A 1% to 3% escalator may look modest in year one, but it compounds over the life of the contract.

The starting rate is only one part of the analysis. The more important question is how the contracted solar rate compares to expected utility costs over the full term.

A building owner should ask for a year-by-year projection showing:

• The starting solar rate

• The annual escalator

• The expected utility comparison

• The total contract cost

• The expected savings by the year

• The assumptions used for utility inflation

A proposal that only highlights first-year savings is incomplete.

Production Guarantees Need Specific Remedies

A production estimate is not the same as a production guarantee.

Commercial solar economics depend on modeled output, so the agreement should define what happens if the system produces less than projected. The important questions are how underperformance is measured, over what period it is evaluated, and what remedy is available if the system consistently misses its target.

The guarantee should be specific enough to answer practical questions. Is compensation paid annually? Is the remedy capped? Are weather assumptions excluded? What happens during outages, roof work, utility curtailment, or equipment failure?

A credible guarantee should not require guesswork.

Interconnection Can Affect Timeline and Cost

Commercial interconnection is often more complex than residential interconnection, especially at larger system sizes.

Depending on the system, utility, and local grid conditions, the project may require studies before approval. Those studies can identify infrastructure upgrades, added costs, or schedule changes. The agreement should state who is responsible for managing interconnection and who bears additional costs if the utility requires upgrades.

In Massachusetts, net metering and compensation rules can also affect the financial return. The credit value, eligibility tier, treatment of excess generation, and utility-specific requirements should be addressed for the actual building, not described in generic terms.

A serious proposal should explain the interconnection path in plain financial terms: what must happen, how long it may take, what could change the economics, and who absorbs that risk.

Ownership Structure Determines Who Captures the Value

Commercial solar can be structured in several ways. The right structure depends on the building owner’s tax position, capital strategy, financing preferences, and tolerance for long-term obligations.

Direct Ownership

Direct ownership generally provides the clearest path to capturing the full financial value of the system, including available tax incentives, depreciation, and production-related benefits. It also places more responsibility on the owner for financing, asset management, and long-term planning.

The current federal incentive landscape makes timing especially important. Section 48E, the Clean Electricity Investment Credit, applies to qualifying clean electricity investment projects, but solar projects now face an accelerated deadline. Projects that begin construction after July 4, 2026, may need to be placed in service by December 31, 2027, to qualify, subject to IRS rules and project-specific facts.

That makes tax review essential. The economics of direct ownership can change materially depending on whether the owner can use the credit, whether bonus provisions apply, how depreciation is treated, and whether the project meets applicable requirements.

Power Purchase Agreements

In a PPA, a third party typically owns and operates the system and sells the electricity to the building owner at a contracted rate. The benefit is reduced upfront capital. The tradeoff is that the building owner does not directly own the asset or capture the tax benefits.

PPAs can work well when the rate structure is favorable and the roof lease terms are clean. They can also create long-term complications if assignment, buyout, roof access, or escalator language is not carefully reviewed.

Commercial Leases

A commercial lease may look similar to a PPA, but the payment structure is different. Instead of paying for the electricity produced, the building owner typically makes a fixed payment for use of the system.

The distinction matters. A fixed lease shifts risk differently than a production-based PPA. The proposal should make clear who carries production risk, who owns the equipment, who receives incentives, and what happens at the end of the term.

Exit Terms Should Be Understood Before Signing

Most commercial solar agreements are designed to last. Early termination is usually possible, but it is rarely inexpensive.

Before signing, the owner should understand the buyout formula at multiple points in the agreement. Years five, ten, and fifteen may produce very different outcomes. If the building is sold and the buyer does not want to assume the agreement, the owner needs to understand the potential exposure before that situation arises.

The same applies to assignment language. If the agreement transfers automatically to a qualified buyer, that is different from an agreement requiring provider approval, lender consent, or additional documentation.

These terms are easiest to negotiate before signing.

A Better Proposal Should Hold Up Under Diligence

A commercial solar proposal should withstand review by ownership, finance, legal, facilities, and lending stakeholders. If the proposal only works in a sales conversation, it is not ready.

At a minimum, a building owner should be able to answer the following before moving forward:

• What is the total cost over the full term?

• What assumptions are being used for utility rate inflation?

• What happens if the system underperforms?

• Who owns the equipment?

• Who receives the tax benefits?

• How does the agreement affect a future sale or refinance?

• What happens if the roof needs work?

• Who carries insurance and liability?

• Who is responsible for interconnection costs?

• What is the buyout cost at multiple points in the term?

A good commercial solar partner should welcome those questions. The answers are not obstacles to the sale. They are the foundation of a sound project.

Why Great Sky Solar Takes the Agreement Seriously

Great Sky Solar approaches commercial solar as a long-term financial and operational decision, not a quick equipment sale. The quality of the design matters. The accuracy of the production model matters. The structure of the agreement matters. So does the owner’s ability to understand what they are signing before signing.

That approach reflects how Great Sky approaches solar more broadly: the system should be evaluated on whether it produces a strong financial return, not on whether it sounds attractive in a sales presentation. Great Sky has also emphasized the importance of precise modeling, responsible assumptions, and avoiding the inflated production claims that can make a proposal look better than it is.

If you are reviewing a commercial solar proposal and want a clearer understanding of the structure, risks, and long-term economics, Great Sky Solar can walk you through the agreement before you make a decision.