State solar profile · #43 of 51
Solar in Iowa: cost, payback & incentives
What a typical home should expect from solar in Iowa - sunshine, electricity rates, modeled payback, and the 2 incentive programs that change the math, built from NREL, EIA, and DSIRE data.
- 4.5
- kWh/m²/day irradiance
- 12.5¢
- avg electricity rate
- 16.7 yr
- payback (#41)
- 2
- incentive programs
The verdict
Iowa scores 21/100 for solar - #43 of 51 - with a modeled 16.7-year payback and roughly $8,150 net over 25 years on a typical 6 kW system before any incentives.
- 21/100
- solar score (#43)
- 16.7 yr
- modeled payback (#41)
- $986
- modeled annual savings
- full
- net-metering policy
All figures are modeled from public NREL/EIA/DSIRE data for a typical 6 kW system; your result depends on roof, shading, utility tariff, and installer pricing.
Iowa at a glance
4.5
irradiance (kWh/m²/day)
12.5¢
electricity rate (per kWh)
$16,500
6 kW system cost
16.7 yr
est. payback (#41)
7,884
kWh/year (6 kW)
$986
annual savings
25-year ROI for a 6 kW system
$16,500
system cost
$986/yr
modeled savings
16.7 yr
break-even
+$8,150
25-year net
Estimates from state averages; actual results vary by system size, roof orientation, shading, utility rate, and installer pricing. Run a personalized estimate →
Installed solar capacity in Iowa, 2016–2024
Total solar nameplate capacity in Iowa reported to the EIA, utility-scale and reported distributed systems.
Where Iowa sits nationally
Every state by sunshine (left-to-right) and payback speed (faster toward the bottom). Iowa is highlighted, its position shows whether sun or electricity rates drive its return.
Iowa (highlighted): 4.5 kWh/m²/day, 16.7-yr modeled payback - slower than the national average.
What the data says about solar in Iowa
Iowa ranks #43 of 51 with a composite solar score of 21/100 (Marginal). The score blends inputs from NREL and EIA: average irradiance of 4.5 kWh/m²/day, residential electricity at 12.5¢/kWh, a turnkey 6 kW installed cost of $16,500 ($2.75/W), and 2 tracked state and utility incentive programs.
On those inputs, a 6 kW array here is modeled to generate roughly 7,884 kWh/year and offset about $986 in annual utility spending at the state's average rate, an estimated 16.7-year simple payback (#41 of 51 for speed to break-even) and a projected +$8,150 net position over a 25-year horizon before utility-rate escalation.
Policy matters as much as physics. Iowa's net-metering framework is classified as full, which governs how exported generation is credited, and its renewable portfolio standard is: Mandatory (105 MW). The 2 active programs tracked in DSIRE include net metering and tax credit types, each can stack to compress payback. Note that the 30% federal residential solar tax credit (§25D) ended for systems placed in service after December 31, 2025, so state and utility incentives now carry more of the economics, confirm current federal rules with the IRS and your tax advisor.
Solar & grid details
- Net-metering policy
- full
- Renewable portfolio standard
- Mandatory (105 MW)
- Installed cost / watt
- $2.75/W
- Annual production (6 kW)
- 7,884 kWh
- Installed capacity (EIA 2024)
- 678 MW
Top incentive programs
2 programs available for Iowa residents
All Iowa solar incentives (2)
IA Net Metering
Retail rate credit
Iowa IOUs offer full retail net metering for customer-owned solar systems up to 500 kW.
Tax creditIA Residential Energy Credit
50% of federal credit amount
Iowa provides a state income tax credit equal to 50% of the federal residential clean energy credit.
Your next step
How to act on Iowa's numbers.
- Run the savings calculator with your real electricity bill, the figures above use state averages, not your usage. Calculate for Iowa
- Check net-metering and SREC value before signing, in a "full" state, export compensation often decides the return. Net-metering guide
- Stack Iowa's 2 incentive programs, each lowers net cost or raises annual return. See all programs
Modeled estimates from public data, not financial advice; a binding figure requires a site-specific assessment from a licensed installer.
Solar resource from NREL; electricity rates and installed capacity from the U.S. EIA; incentive programs from DSIRE. See our methodology.