Iowa
Iowa solar in 2026
Iowa is not a sunshine state, and that is not the killer. The production numbers are respectable enough to support a careful project. The issue is what happens after your panels make more power than the house is using. MidAmerican and Interstate Power and Light can use inflow-outflow billing, which turns exports into dollar credits at an outflow purchase rate. That is a different economic animal from old-fashioned retail net metering.
Iowa power prices are only half the solar calculation
A modest retail price does not automatically rule out solar in Iowa. A paid-off system models at 9.4 cents per kWh over 25 years. The crucial distinction is between power the home consumes and power it delivers to the utility, because those streams can receive very different bill treatment.
| Energy source | Type | Average price | What that means |
|---|---|---|---|
| Iowa household electricity | Electricity | 14.14¢ per kWh | Statewide May 2026 residential average from EIA. |
| Iowa residential gas | Natural gas | $15.72 per Mcf | EIA's May 2026 residential series, equal to about 5.2 cents per thermal kWh. |
| Owned Iowa rooftop solar | Electricity | ~9.4¢ per kWh | A 25-year levelized result calculated with EnergySage cash cost and PVGIS production. It is for behind-the-meter consumption; exports use the tariff treatment below. |
Electricity data is EIA Table 5.6.A for May 2026. Iowa's residential gas value comes from EIA natural gas prices, where one Mcf is about 304 thermal kWh. Our method for the solar value is on the methodology page.
Iowa production has more room than its reputation suggests
The numbers do not pretend Des Moines is Phoenix. They do show usable output across the state, with a meaningful spread between Davenport and Sioux City. Shade, roof direction, and the utility tariff are likely to move a real proposal more than a generic claim that Iowa is too cloudy.
| City in the model | kWh generated by each kW annually | Estimated yearly output, 13.14 kW |
|---|---|---|
| Des Moines | 1,399 | 18,388 kWh |
| Cedar Rapids | 1,375 | 18,070 kWh |
| Davenport | 1,362 | 17,893 kWh |
| Sioux City | 1,423 | 18,701 kWh |
Method: PVGIS v5.2 model runs by Solar Learning Lab on August 18, 2026, using the NSRDB radiation database. Assumptions: fixed roof mount, south facing, 30 degree tilt, 14 percent losses. Your roof will differ.
Inflow-outflow means exports are dollars, not your old kWh
Senate File 583, now Iowa Code § 476.49, requires Interstate Power and Light Company and MidAmerican Energy Company to file distributed-generation tariffs using either net billing or inflow-outflow. Under net billing, exports create kWh credits. Under inflow-outflow, you pay applicable charges for delivered energy and your exports create dollar credits at the outflow purchase rate. Those credits can offset future volumetric kWh charges.
That distinction belongs on page one of your quote. A system sized as if every exported kWh cancels a retail kWh can look better on paper than it will on a MidAmerican or Interstate Power and Light bill. Ask which tariff applies to your address, the current outflow purchase rate, whether credits expire, and what share of the forecast is expected to export. Do not accept a savings model that calls this plain net metering.
Policy source: Iowa Utilities Commission distributed generation guidance.
An Iowa quote needs a tariff name, docket, and utility type
Iowa Code section 476.49 puts the state's two large regulated utilities on a specific path. Interstate Power and Light Company and MidAmerican Energy Company must file distributed-generation tariffs using either net billing or inflow-outflow. Those are not interchangeable labels. Net billing creates credits in kilowatt-hours for exported electricity, usable against kWh in later billing periods. Inflow-outflow creates dollar credits at the outflow purchase rate, usable against future volumetric kWh charges.
The approved tariff record is concrete. MidAmerican's Rate IO, Inflow/Outflow Billing of Eligible Distributed Generation Facilities, was approved in docket TF-2020-0235 on November 24, 2020. Interstate Power and Light's inflow-outflow DG tariff is docket TF-2020-0237. A homeowner should ask the installer to name the tariff that applies at the address and build the savings sheet from that tariff, not from a generic statewide net-metering label.
The timing of production matters under this framework. A system can look strong on an annual total while exporting heavily during bright months and buying electricity in other periods. A good proposal separates delivered electricity, onsite consumption, and exports. It then states the outflow purchase rate used for the export forecast. If the quote cannot show those streams, it cannot show whether the headline savings depend on retail-priced exports that the tariff does not provide.
Utility jurisdiction is the next filter. The IUC's interconnection, safety and operating reliability standards in 199 IAC chapter 15 apply to all utilities, while the distributed-generation interconnection rules in 199 IAC chapter 45 apply to rate-regulated MidAmerican and Interstate Power and Light. Municipal utilities and rural cooperatives sit largely outside IUC rate jurisdiction and may use their own forms. The base net-metering rules remain at 199 IAC 15.10(3). Confirm the actual utility before assuming any form, tariff, or credit method applies.
Tariff and jurisdiction guidance: Iowa Utilities Commission distributed generation guidance.
Closed credits and the remaining Iowa reality
| Tax item | Current status | Details |
|---|---|---|
| Iowa Solar Energy System Tax Credit | Closed to residential installations | Senate File 2367, Division X ended eligibility for new residential installations. The prior residential application window was limited to installations completed before the 2022 calendar year (Iowa Department of Revenue) |
| Federal 25D | Ended December 31, 2025 | A lease or PPA provider can still claim 48E and may account for that value in its rate (CRS) |
Use the calculator to separate onsite use from export risk
The calculator is deliberately conservative about the state credit because there is no current residential credit to claim. Its retail-rate savings estimate is not a substitute for the outflow rate on your actual tariff. Use the result as a starting point, then make the installer show self-consumption and exports separately.
Slider bounds come from our four Iowa PVGIS runs. Sioux City produces 1,423.2 kWh per kW per year and Davenport 1,361.7, a spread worth pricing rather than hand-waving.
Cash quotes in Iowa cluster near $3.27 per watt, against a $3.50 national 2024 median (LBNL). Use your quote.
Assumptions you can change
Use the rate on your actual lease or PPA quote. There is no published statewide average we trust enough to hardcode.
Cash purchase
$22,236 after state credit
- Year 1 benefit
- $111/mo
- Payback
- 15 years
- 20 year net position
- $10,197
No active residential state solar credit is confirmed. Iowa closed the residential Solar Energy System Tax Credit to new installations, so the deal needs to work on its own consumption and export terms.
Solar loan
$273/mo 15 yr payment
- Year 1 net
- -$162/mo
- Upfront
- $0
- 20 year net position
- -$16,744
We price loans at $4.47 per watt: the EnergySage Iowa cash figure plus the $1.20 national loan-over-cash spread LBNL documents, because dealer fees get folded into loan pricing.
Lease / PPA
$0 down you buy the power
- Year 1 net
- -$78/mo
- Upfront
- $0
- 20 year net position
- -$19,971
A lease or PPA provider can still claim the federal 48E business credit. That does not change the utility tariff that applies at your meter.
Iowa estimates, not quotes. Inputs use EIA Table 5.6.A, May 2026; our PVGIS production runs; and EnergySage August 2026 cost data. Iowa exports can become dollar credits under inflow-outflow tariffs, so your serving utility and consumption pattern matter. We are a solar installer and we also partner with other solar companies. See our disclosures.
Iowa specifics worth acting on
- Get the tariff name before the design meeting. MidAmerican Rate IO and Interstate Power and Light's inflow-outflow tariff are not a detail to sort out after contracting.
- Ask for a month-by-month production and consumption chart. Annual netting can hide summer exports that receive dollar credits rather than retail-rate kWh value.
- Municipal utilities and rural electric cooperatives may use their own forms and rules. The Iowa Utilities Commission says its rate-jurisdiction coverage is limited there.
- The residential tax credit is closed. If a salesperson shows it as current money, stop the meeting.
Iowa installer review: make the tariff part of the bid
The scores here are EnergySage marketplace ratings rather than Google data. The Solar Guys was named EnergySage Installer of the Year for 2026. Beyond ratings, compare licenses, proof of insurance, production assumptions, and the utility tariff shown in each written proposal.
The Solar Guys
Ankeny, IA
5.0(42 EnergySage reviews)
All Energy Solar
Serving Iowa
4.8(377 EnergySage reviews)
Wolf River Electric
Serving Iowa
4.5(108 EnergySage reviews)
Eagle Point Solar
Des Moines, IA
4.7(27 EnergySage reviews)
SolQ
Hills, IA
4.8(12 EnergySage reviews)
Ratings snapshot: EnergySage marketplace, August 2026. Zero companies paid us and none are endorsed by us. Our research found no Iowa solar-specific licensing body, so verify the electrical credentials that will cover your project.
Get an Iowa solar starting point
Four responses make a preliminary estimate using the EIA and PVGIS figures here. We are a solar installer and we also partner with other solar companies. Details in our disclosures.
What does your monthly electric bill look like?
Iowa average is $112 per month (EIA, 2024).