How do businesses finance commercial solar?

Four main paths in 2026. Solar loan (5–9% APR, 10–20 yr term): business owns the system and captures the 30% federal Investment Tax Credit (ITC) + accelerated depreciation (MACRS bonus). Power Purchase Agreement (PPA) : third party owns the system on your roof; you buy the electricity at a fixed rate for 10–25 years. No upfront cost but you don't capture ITC. Operating lease : middle ground — lower upfront than loan, lessee gets some tax benefits. C-PACE (Commercial Property Assessed Clean Energy): property-secured financing repaid through property tax assessment, 20–30 yr term, transferable on property sale.

What's the federal Investment Tax Credit (ITC) for solar in 2026?

30% federal ITC on qualifying commercial solar installations through 2032 under the Inflation Reduction Act. The credit applies to system + installation costs and can be combined with accelerated depreciation (MACRS 5-year + bonus depreciation). Combined federal benefits typically recover 40–50% of system cost in the first 1–6 years for owned systems. PPA arrangements don't capture ITC for the customer — the third-party owner does.

How much does commercial solar cost?

Wide range by system size. Small commercial (50–200 kW) : $1.50–$2.50 per watt installed = $75K–$500K. Mid-size (200–500 kW) : $1.30–$2.00 per watt = $260K–$1M. Large commercial / industrial (500 kW–1 MW+) : $1.10–$1.80 per watt = $550K–$1.8M+. Costs include panels, inverters, racking, installation, interconnection, permitting. Costs have come down 60% over the past decade.

Should I use a solar loan or PPA?

Solar loan if: business is profitable enough to capture ITC + depreciation benefits, plans to own the building 8+ years, has access to financing. PPA if: business doesn't have tax appetite to use ITC (non-profit, low-profit), wants zero upfront cost, doesn't want operations responsibility for the system, willing to forgo long-term ownership economics. Loan typically has better 10-yr economics for tax-paying businesses; PPA easier and risk-free.

What is C-PACE and how does it work for solar?

C-PACE (Commercial Property Assessed Clean Energy) is property-secured financing for energy efficiency and renewable improvements, repaid through a special tax assessment on the property. 20–30 year terms , fixed rate ~5–7% , up to 100% project financing (no down payment). Transferable on property sale — the obligation stays with the property. Available in 30+ states with active C-PACE programs. Best for commercial property owners doing larger solar + efficiency projects.

Commercial Solar Financing: PPA, Lease, Loan, C-PACE Compared (2026)

Quick answer

Commercial solar financing in 2026 has four main paths. Solar loan (5–9% APR, 10–20 yr term): business owns the system, captures 30% federal Investment Tax Credit (ITC) + accelerated MACRS depreciation (combined 40–50% federal benefit recovered in first 1–6 years). Power Purchase Agreement (PPA): third-party owns the system, business buys electricity at fixed rate for 10–25 years, zero upfront cost but no ITC for customer. Operating lease: middle ground — lower upfront than loan, lessee gets some tax benefits. C-PACE (Commercial Property Assessed Clean Energy): property-secured financing repaid via property tax assessment, 20–30 yr term, 5–7% rate, up to 100% LTV, transferable on property sale. Installed cost: $1.10–$2.50 per watt depending on system size.

Get matched →

Commercial solar economics in 2026 have never been better — system costs have dropped ~60% in the past decade, the federal Investment Tax Credit is locked at 30% through 2032, and financing options have matured. The right financing path depends on tax appetite, ownership preference, and project size. This guide breaks down the four main structures and when each wins. For related see Section 179 tax strategy 2026 and equipment financing.

Solar Loan (Ownership + Tax Benefits)

Rate: 5–9% APR (lower with strong credit and SBA-backed solar programs)
Term: 10–20 years typical
Down payment: 0–20%
Tax benefits captured: 30% federal ITC, MACRS 5-year accelerated depreciation, bonus depreciation (60% in 2026)
Best for: Profitable businesses with tax appetite, 8+ year property hold, want long-term system economics
Top lenders: Sunrun Commercial, Mosaic, Sungage Financial, Live Oak Bank solar, GreenTree Energy Finance, regional banks with solar specialty

Power Purchase Agreement (PPA)

Structure: Third-party developer installs and owns the system on your roof / property. You buy the electricity it generates at a fixed $/kWh rate for the term.
Upfront cost: $0 to customer
Term: 10–25 years
Rate structure: Fixed $/kWh, typically 10–30% below current utility rate, with annual escalator (1–3%)
Tax benefits: Captured by the system owner (developer), not you. Pass-through pricing reflects developer's benefit.
Best for: Non-profits, low-profit businesses with no tax appetite, businesses that want zero risk and no operational responsibility
Top providers: Sunrun Commercial, Sunrock Distributed Solar, Standard Solar, Cypress Creek Renewables

Operating Lease

Structure: Lease the system from a financing company; payments deductible as operating expense; some lease structures give lessee depreciation benefits
Upfront cost: $0–10% down
Term: 10–15 years
Best for: Middle ground between loan and PPA — some tax benefits captured, less risk than ownership, more economics than PPA
Top providers: Sungage Financial, Renew Financial, Sunrun TPO (third-party ownership)

C-PACE (Commercial Property Assessed Clean Energy)

Property-secured financing repaid via special property tax assessment:

Term: 20–30 years (matches useful life of improvements)
Rate: 5–7% fixed (often best rate available)
LTV: Up to 100% project financing — no down payment required
Repayment: Added to property tax bill as a special assessment, paid alongside normal taxes
Transferable: Obligation stays with the property on sale — new owner picks up the C-PACE payment
Eligible projects: Solar PV, energy efficiency, water conservation, resilience (storm-hardening)
Available in 30+ states: CA, NY, FL, TX, CO, OH, MD, MN, MO, NV, RI, VT, CT, DC, others. Programs vary by state.
Best for: Commercial property owners on larger solar + efficiency projects; especially attractive to owners planning to sell within 5–10 years (obligation transfers with property)

Worked Economics: $300K Solar System

200 kW commercial rooftop, $1.50/watt installed = $300K project cost. Profitable business at 25% effective tax rate.

Solar Loan Path

Cash at close: $30K (10% down)
Loan: $270K at 7% over 15 years — ~$2,425/mo
30% ITC = $90K credit against current-year tax liability
MACRS bonus depreciation year one = ~$110K deduction = ~$27.5K tax savings
Year 1 net cash flow: -$30K (down) + $90K (ITC) + $27.5K (depreciation savings) - $29K (loan payments) = +$58.5K positive
Plus electricity savings of ~$30K/yr going forward

PPA Path

Cash at close: $0
Electricity cost reduction: ~$15K/yr (smaller than ownership because developer captures the difference)
Year 1 net cash flow: +$15K
No ITC, no depreciation
20-yr total benefit: ~$300K (less than ownership's ~$500K+)

For profitable businesses, ownership wins on 20-year economics. PPA is simpler and zero-risk.

Next Step

Get matched with commercial solar lenders — solar loan providers, PPA developers, C-PACE programs. See also Section 179 tax strategy 2026 and equipment financing.