iSolar — Minnesota Solar & Electrical

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Free tool · commercial & ag

Commercial Solar ROI Calculator

See what solar could do for your business’s bottom line — system size, the 30% federal tax credit, 100% bonus depreciation, energy savings, payback and 25-year return. Built on Minnesota commercial numbers, not a national average.


Your business’s typical monthly power bill.


MN commercial average is ~$0.135. Check a bill for yours.

Advanced assumptions ▾

Typical MN commercial range $2.10–$2.70/W.

Used to value depreciation. Your CPA knows your exact rate.

How much of your usage the system covers.

Assumed annual escalation for 25-yr savings.

Simple payback
25-year ROI
System size
Estimated installed cost
30% federal tax credit (ITC)
Depreciation tax benefit (100% bonus)
Net cost after incentives
Year-1 energy savings
Estimated 25-year net savings

Like these numbers?

This is a starting point. iSolar will confirm the real system, price and incentives for your building — no pressure.

Get a free commercial quote
Call (651) 565-1140

How the commercial numbers work

30% Tax Credit (ITC)

Commercial & agricultural solar still qualifies for the 30% federal Investment Tax Credit — a dollar-for-dollar credit against your tax bill. Percentages tighten over time, so timing matters.

100% Bonus Depreciation

Businesses can depreciate the system (basis reduced by half the ITC) — often a large first-year deduction that further lowers your true cost.

Energy Savings & Payback

Every kWh you produce is a kWh you don’t buy. As utility rates rise, your savings grow — and your payback shortens.

Estimates only — not tax advice. Actual incentives depend on your tax situation, eligibility, domestic-content and FEOC rules, and project timing (the deadline test is when construction begins — projects that began construction by July 4, 2026 get a four-year safe harbor, and otherwise construction generally must begin by Dec 31, 2026 with the system placed in service by Dec 31, 2027). iSolar does not provide tax or legal advice — please confirm figures with your CPA or tax advisor before making a decision.

Good questions

Frequently asked.

Does my business really get the 30% tax credit?

Yes — commercial and agricultural solar qualify for the 30% federal ITC (the residential credit ended in 2025). It’s a dollar-for-dollar credit against your tax bill. The timing test is when construction begins: projects that began construction by July 4, 2026 hold a four-year safe harbor; otherwise construction generally must begin by Dec 31, 2026 and the system be placed in service by Dec 31, 2027. Your CPA confirms how it applies to your return.

How does the depreciation actually work?

Businesses depreciate the system on a 5-year MACRS schedule with 100% first-year bonus depreciation. The depreciable basis is reduced by half the ITC — so a system taking the 30% credit still depreciates 85% of its cost. Stacked on the credit, it recovers a large share of the cost in the first year. This tool models that; your accountant runs the exact figures.

What electricity rate should I use for Minnesota?

Minnesota commercial power averages around $0.135/kWh, but yours is printed on your bill — use your real rate for a truer payback. Larger systems on Xcel (over 40 kW) can also earn the PV Demand Credit Rider, a production credit around 7¢/kWh on peak-hour output, which this simple tool leaves out but we factor into your real numbers.

Does this include every incentive?

No — it keeps the math to the ITC, depreciation and energy savings. Xcel’s PV Demand Credit Rider, PACE financing and the low-income communities bonus credit can add to it. Run your project through the Incentive Finder, or just ask us.

Is this what a real project looks like?

Close, for a mid-size building. Our larger commercial installs run into the hundreds of panels — the Edina City Hall project is a good example. See it and more on our Commercial Solar page, then let us model your building specifically.

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