Solar calculator for Oklahoma
Panels, system size, cost and payback for Oklahoma, from your own power bill.
The average Oklahoma home uses 1,079 kWh a month and pays 12.2 cents per kWh, which puts Oklahoma at some of the cheapest electricity in the country, which stretches payback. Oklahoma has both a heating and a cooling season, so the bill swings both ways and a full year of bills gives a better answer than one month. A south-facing fixed array there makes about 1,542 kWh per installed kW a year, and the worst winter month still gets 3.84 peak sun hours a day. Drop in your own bill below and the numbers on this page are replaced by yours.
A worked example for Oklahoma
Take the average home: 1,079 kWh a month, which is 12,948 kWh a year, at 12.2 cents per kWh (EIA, 2024 residential averages, as of 2026-11). Sized to cover all of that use, the tool returns 8.4 kWdc and 21 panels, needing about 441 square feet of roof. The installed estimate is $20,908 (national median, EnergySage H2 2025), yearly savings are about $1,580, and simple payback is 13.2 years, with no incentive applied.
Sun and yield in Oklahoma
We use 1,542 kWh per installed kW per year for Oklahoma, from NREL PVWatts v8 for the state's largest city at a 20 degree south-facing tilt (via TheGreenWatt, as of 2026-11). The darkest month averages 3.84 peak sun hours a day, which matters if you plan to go off-grid or size a battery. A different roof angle or heavy shade changes this, so treat it as a starting point.
Incentives
The 30% federal tax credit ended for homeowner purchases after December 31, 2025, so none is applied here. See the tax credit guide. Look up Oklahoma and your own utility for net metering terms and any local programs before relying on a payback number.
Planning estimate. Permits, interconnection approval and a licensed electrician are required for grid-tied systems.
Questions
How many solar panels does a Oklahoma home need?
The average Oklahoma home uses 12,948 kWh a year (EIA 2024). At about 1,542 kWh per installed kW, covering all of it takes 8.4 kWdc, or 21 panels. Your own bill will move that up or down.
How much does solar cost in Oklahoma?
For the average-home example the installed estimate is $20,908 at the national median of $2.49 per watt (EnergySage, H2 2025, as of 2026-11). We have no sourced Oklahoma price multiplier, so local quotes will differ.
Is there a federal solar tax credit in Oklahoma?
The 30% federal tax credit ended for homeowner purchases after December 31, 2025. Check your state, utility and local programs separately.
Where does the Oklahoma sun figure come from?
1,542 kWh per kW per year and 3.84 winter peak sun hours come from NREL PVWatts v8 runs for Oklahoma's largest city, compiled by TheGreenWatt (as of 2026-11). Real yield varies across the state.
Is my bill uploaded?
No. Your bill is read in your browser and never uploaded.