Paying Cash for Solar in Minnesota

← All financing options · Last reviewed October 2026

Paying cash at a glance

How the iSolar cash schedule works

For homeowners, you pay 5% down when you sign, with a $1,200 minimum. On a typical 7 kW system priced around $21,000–$22,750, that's roughly $1,050–$1,140, so the $1,200 minimum applies. After that, you pay 50% of the remaining balance when permits and utility interconnection are approved, 30% after installation, 10% after the electrical inspection passes, and the final 10% at Permission to Operate (PTO). On a $21,000 system: $1,200 at signing, then $9,900, $5,940, $1,980 and $1,980. Every payment date is in your contract before you sign.

Commercial and agricultural projects follow a four-step schedule tied to real progress:

1. 20% at signing. This covers engineering, permitting and the utility interconnection application.
2. Up to 70% total when the utility approves the system for installation.
3. Up to 95% total when installation is complete and the electrical inspection has passed.
4. The final 5% at Permission to Operate (PTO), when the utility lets you turn the system on.

That last payment matters. Holding money back until PTO keeps the installer accountable for the final paperwork, which is the part of a solar job most likely to stall.

Why cash usually wins on lifetime return

A solar system pays you back through lower electric bills. If you pay cash, those savings go toward getting your money back. With a loan, part of the savings goes to interest first.

Here's an example. A $21,000 system financed at an illustrative 7% rate over 15 years costs about $189 a month, or roughly $34,000 over the full term. About $13,000 of that is interest. Paying cash skips that, which is why the same system typically pays for itself years sooner with cash. Real loan rates depend on the lender and your credit. This example isn't a quote.

Cash also keeps the price simple. Many low-rate solar loans hide a dealer fee inside the system price. The Consumer Financial Protection Bureau found these fees commonly run 10% to 30% of the cash price. When you pay cash, the cash price is what you pay. Our post on how dealer fees inflate financed solar prices explains more.

If you're an Xcel customer, your savings come from monthly net metering. Solar*Rewards, a 10-year production incentive, can add to them when program capacity is open. Xcel sets the incentive rate each program year, and we confirm the current rate in your quote. See our Solar*Rewards guide for how enrollment works.

Minnesota tax rules that help, and the one that's gone

• No sales tax on solar equipment. Minnesota exempts solar energy systems from state sales tax under Minn. Stat. 297A.67.
• No property tax on the added value. Minnesota exempts the value solar adds to your property from property tax (Minn. Stat. 272.02). In practice, your property tax shouldn't rise because you added panels.
• No federal homeowner credit. The 30% Residential Clean Energy Credit (§25D) is not available for systems placed in service after December 31, 2025, according to the IRS. What counts is when the system is installed and complete, not when you paid. Our 2026 federal tax credit explainer covers what changed.

Commercial owners are in a different position. A business paying cash may still be able to claim the §48E investment credit and depreciation, but the deadlines are tight. Projects that begin construction after July 4, 2026 must be placed in service by December 31, 2027. Talk to your tax advisor and see our commercial solar ROI calculator.

What counts as "cash"

To us, cash means we're paid directly instead of through a solar lender's funding milestones. That can come from savings, or from financing you arrange yourself, such as a home-equity loan or line of credit from your own bank or credit union. Some solar-specific loans, like the Affinity Plus solar loan, close with the lender and pay out like this. Either way, the same cash schedule applies.

How it works with iSolar

1. Free assessment. Send us a year of electric bills, or use our utility bill extractor. We design a system sized to your usage.
2. Written proposal. You get one cash price with equipment, production estimate, warranty and payment schedule in writing.
3. Sign and pay the deposit. That's 5% down ($1,200 minimum) for homes, or 20% for commercial.
4. Permits and interconnection. We handle the city permit and the utility application, including Solar*Rewards if you're eligible.
5. Install. A typical home takes 1–2 days on site with our in-house crew.
6. Inspection and PTO. After the city inspection and utility approval, your system turns on and the final 10% is billed.
7. Warranty registration. We register the system for our 30-year SolarInsure warranty.

Who cash is best for, and who it isn't

Best for

• Homeowners with savings earning less than solar's return, who plan to stay in the home for years
• Retirees who want lower fixed costs without adding a monthly payment
• Businesses and farms with cash and tax appetite to use §48E and depreciation before the 2027 deadline

Not ideal for

• Anyone who would drain an emergency fund to pay for it
• Homeowners who may move in a few years and prefer to keep cash liquid
• Buyers who'd rather start saving now and pay over time. A no-dealer-fee loan like One Ethos keeps the financed price equal to the cash price.

If you're unsure, compare both side by side. Our solar loan vs. cash comparison shows how.

See your cash price and payback

Every iSolar quote shows a cash price and a payback estimate based on your actual usage and roof. Try the solar payback calculator for a quick estimate, or request a free quote and we'll run your real numbers.

Sources

• Minnesota Revisor of Statutes — Minn. Stat. 297A.67 (sales tax exemptions, incl. solar energy systems)
• Minnesota Revisor of Statutes — Minn. Stat. 272.02 (property tax exemptions, incl. solar)
• IRS — Residential Clean Energy Credit
• Consumer Financial Protection Bureau — Issue Spotlight: Solar Financing

iSolar is not a lender. Loan approval, rates and terms are set by the lender. Information current as of October 2026; confirm details with the lender.