Residential vs. Commercial Solar — Which Is Right for Your Tucson Property?

Published: 2026 · Reading time: 5 minutes · Tucson, AZ

Whether you're a homeowner looking to slash your electric bill or a business owner wanting to reduce operating costs, solar makes sense in Tucson. But residential and commercial solar are fundamentally different — in system design, financing, tax incentives, and ROI. Here's what you need to know.

Residential Solar: Key Facts

System Size: 4kW–12kW, typically 6-8kW for an average Tucson home.
Cost: $10,000–$30,000 before incentives ($7,000–$21,000 after 30% federal tax credit).
Payback Period: 6–9 years.
Roof Type: Asphalt shingle, concrete tile, or metal residential roofs.
Primary Goal: Offset household electricity usage; protection from rising TEP rates.
Incentives: 30% federal ITC, Arizona $1,000 state credit, sales tax exemption, net metering.

Residential solar in Tucson is a straightforward investment. Most homeowners see $100–$180/month in savings and recoup their investment in under 8 years. With the 30% tax credit, the net cost of a 6kW system is approximately $10,000–$14,000 — about the price of a used car, but one that saves you money every month for 25+ years.

Commercial Solar: Key Facts

System Size: 25kW–500kW+, depending on facility size and energy demand.
Cost: $2.50–$3.50 per watt installed. A 100kW system: $250,000–$350,000 before incentives.
Payback Period: 3–5 years (faster than residential due to depreciation benefits).
Installation Type: Rooftop (flat roofs with ballasted racking), ground-mount, or solar carports.
Primary Goal: Reduce operating expenses, manage demand charges, demonstrate ESG commitment.
Incentives: 30% federal ITC, MACRS accelerated depreciation (5-year), Arizona Renewable Energy Tax Credit, sales tax exemption.

Commercial solar offers faster payback than residential because businesses can use accelerated depreciation (MACRS) to deduct the system's cost over just 5 years — effectively reducing the net cost by another 20-25% beyond the tax credit. For Tucson businesses facing TEP's commercial demand charges (often 30-50% of the bill), solar + battery storage delivers a double win: reduced energy costs and reduced demand charges.

Which One Is Right for You?

Choose Residential Solar if: You own a single-family home in Tucson, have a suitable south-facing roof, and want to reduce or eliminate your monthly TEP bill.

Choose Commercial Solar if: You own or lease a commercial property (retail, warehouse, office, multifamily), have high daytime energy usage, and want to reduce operating costs while demonstrating environmental leadership.

Not sure which applies? Fill out our form and we'll match you with a pro who handles your property type — residential or commercial. Get matched today. Call (520) 593-0496.