The choice between owning your commercial solar system and signing a PPA determines who captures the 30% ITC, MACRS depreciation, and 25-year energy savings. Here is what the numbers look like for each path.
Key financial and operational factors for a representative 500 kW commercial rooftop solar installation. All figures sourced from NREL, EIA, and IRS guidance.
| Factor | Solar Ownership | Power Purchase Agreement (PPA) |
|---|---|---|
| Upfront Cost | $1.40–$2.20/W ($700K–$1.1M for 500 kW) | $0 — no capital required |
| Federal ITC (30%) | Owner captures — worth $210K–$330K on 500 kW | PPA provider captures — owner gets none |
| MACRS Depreciation | Owner captures (5-year) — worth ~25% of system cost | PPA provider captures |
| Energy Rate | Grid rate eliminated — generates at $0/kWh | $0.07–$0.12/kWh + 1–3%/yr escalator |
| Payback Period | 4–7 years after ITC + MACRS | Immediate savings — no payback needed |
| 25-Year Value | Higher (own system, no fuel cost) | Lower (ongoing payments, no asset) |
| Best For | Taxable entities with capital, long-term holders | Tax-exempt orgs, no-capex preference, tenants |
Ownership delivers the strongest lifetime economics for taxable commercial entities with access to capital and a long investment horizon.
The 30% ITC is only valuable if you have federal tax liability. Most commercial property owners and corporations do. Combined with MACRS, you recover 55–75% of system cost in year 1–5, dramatically compressing the true payback period.
Ownership builds long-term asset value and eliminates energy cost for the system's 25–30 year life. After payback (4–7 years), every kWh is pure cost savings. The solar asset also increases property valuation on sale.
Ownership pairs best with battery storage (also ITC-eligible) for full resilience. PPA agreements rarely include battery storage and don't allow you to benefit from demand response revenue or future grid arbitrage opportunities.
Get a free solar financing analysis for your building — ownership ROI vs PPA savings side by side, using your actual utility rates.
PPAs make the most sense when tax incentives are inaccessible, capital is constrained, or the holding horizon is shorter than a typical ownership payback.
Tax-exempt organizations cannot use the ITC directly. A PPA lets a taxable developer monetize the credits and pass savings to you through below-market energy rates — giving you the economic benefit without direct tax exposure.
PPAs require zero upfront investment. If capital is constrained or competing priorities outrank energy projects, a PPA captures 15–25% energy savings without touching your balance sheet, credit lines, or operating budget.
If you don't own the building long-term or the lease is under 10 years, PPA economics may be more favorable since you're not responsible for system buyout if you leave. Shorter tenures rarely justify the ownership capital outlay.
Answers to the most common questions commercial property owners ask when evaluating solar financing options.
A Power Purchase Agreement (PPA) is a contract where a third-party developer installs, owns, and maintains solar panels on your building's roof. You agree to purchase the electricity generated at a fixed or escalating rate (typically $0.07–$0.12/kWh) for 15–25 years. There is no upfront cost, but you don't own the system and forfeit the 30% ITC and depreciation benefits.
Ownership captures: (1) 30% federal Investment Tax Credit (ITC) under the Inflation Reduction Act; (2) 5-year MACRS accelerated depreciation (typically worth 25–30% of system cost); (3) Full energy value — all kWh generated reduce your bill at retail rates; (4) System ownership at end of life. Combined, ownership returns 55–75% of project cost via tax benefits in years 1–5. PPAs deliver no tax benefit to the building owner — all incentives go to the PPA provider.
Commercial PPA rates typically start at $0.07–$0.12/kWh with 1–3% annual escalators, versus average commercial grid rates of $0.12–$0.22/kWh (EIA 2025). PPAs deliver immediate savings without capital outlay, but 25-year escalated PPA rates can exceed grid rates in deregulated markets over time. Ownership locks in zero fuel cost for 25+ years.
Ownership is better for most taxable commercial entities with access to capital. The 30% ITC + MACRS depreciation returns 55–75% of cost in year 1–5, making the net cost of ownership competitive with PPA economics over 20+ years. PPAs make sense for: tax-exempt entities (nonprofits, government), organizations that prefer no capital expenditure, and tenants who cannot access ownership incentives.
Yes, but it requires buyer consent to assume the PPA. Most PPAs allow transfer of agreement to a new property owner, but buyers must qualify under the PPA provider's terms. If the buyer doesn't want to assume it, the seller may need to pay a buyout fee (typically equal to the present value of remaining payments). Solar ownership transfers cleanly with the property deed.
Get a free audit that models both ownership and PPA economics using your actual utility data, building size, and tax position.