Resource Guide

Best States for Commercial Solar in 2026

Commercial solar ROI varies dramatically by state based on utility rates, state incentive programs, solar irradiance, and net metering policies. Here is how the major markets compare.

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What makes a state a strong commercial solar market?

Four factors drive commercial solar economics: (1) Utility rates — higher commercial electricity rates mean more savings per kWh of solar production; (2) State incentive programs — SRECs, production incentives, property and sales tax exemptions multiply the federal ITC; (3) Solar irradiance — more peak sun hours mean more annual production per installed kW; (4) Net metering policies — retail-rate net metering maximizes the value of excess solar production. The best markets combine multiple favorable factors; the strongest single factor is almost always utility rate, which directly multiplies every other variable.

What are the top states for commercial solar ROI?

New England states (Connecticut, Massachusetts, New York, New Jersey) offer the strongest ROI based on electricity rates alone, with rates often exceeding $0.20/kWh for commercial accounts. Arizona and California offer exceptional solar production that compensates for somewhat lower rates in parts of those markets. Illinois offers a uniquely strong combination of moderate rates, Illinois Shines SREC income, the ComEd Smart Inverter Rebate, and our established Solar One Illinois installation partner. States like Michigan and Wisconsin have higher-than-average utility rates for the Midwest that make solar economics compelling despite lower irradiance.

Why is Illinois often highlighted as a top commercial solar market?

Illinois benefits from an unusually deep incentive stack. ComEd commercial rates are above the national average. The Illinois Shines Adjustable Block Program adds 15-year SREC income on top of electricity savings. The ComEd Smart Inverter Rebate provides up to $250/kW in cash incentives. The Illinois Property Tax Assessment Freeze eliminates any property tax increase from the solar installation. And the state's industrial and manufacturing base creates a large pool of businesses with the high electricity consumption and federal tax liability needed to leverage the ESP model effectively.

Which Sun Belt states offer the best commercial solar for businesses?

Arizona stands out for the combination of exceptional solar irradiance (Phoenix averages over 6.0 peak sun hours daily), APS and SRP commercial rates, a 10% state corporate tax credit, and property and sales tax exemptions. Texas offers high irradiance and no state income tax complexity, with energy community ITC adders available in several regions. Florida's sales tax exemption and FPL/Duke net metering rates combine with strong irradiance to make commercial solar compelling in the I-4 corridor and coastal markets. California remains exceptional despite NEM 3.0 changes due to PG&E and SCE commercial rates that make every kWh of self-consumed solar extremely valuable.

Are Midwest states competitive for commercial solar?

Yes, particularly for manufacturers and distributors with large facilities. Illinois, Michigan, Wisconsin, Minnesota, Indiana, and Iowa all have commercial electricity rates meaningfully above national averages for the Midwest. These markets have lower irradiance than the Sun Belt (4.0-4.5 peak sun hours vs. 5.5-6.5 in the Southwest), but the rate economics more than compensate. Illinois Shines SRECs, Wisconsin Focus on Energy, and Minnesota Solar*Rewards further improve Midwest project economics. USDA REAP grants in Iowa and Michigan's rural markets add additional funding for agricultural and rural businesses.

Does solar irradiance matter more than utility rates for commercial ROI?

For most commercial solar decisions, utility rate is the more important variable. A 50% increase in electricity rate improves project ROI more than a 50% increase in solar production, because rate affects every kWh generated while irradiance only affects total production volume. A facility in Connecticut paying $0.22/kWh with 4.2 peak sun hours generates more economic value per installed kW than the same facility in Nevada paying $0.10/kWh with 6.5 peak sun hours. This is why New England consistently ranks among the best commercial solar markets despite being in the Northeast.

Find Out How Your State Stacks Up. Get a Custom Proposal.

Our team will apply every applicable incentive and depreciation strategy to maximize the financial return on your solar investment.

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