Solar calculator for Louisiana
Panels, system size, cost and payback for Louisiana, from your own power bill.
The average Louisiana home uses 1,202 kWh a month and pays 11.7 cents per kWh, which puts Louisiana at some of the cheapest electricity in the country, which stretches payback. Summer cooling drives the bill in Louisiana, and that load lands in the sunniest hours, which suits solar. A south-facing fixed array there makes about 1,479 kWh per installed kW a year, and the worst winter month still gets 3.74 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 Louisiana
Take the average home: 1,202 kWh a month, which is 14,424 kWh a year, at 11.7 cents per kWh (EIA, 2024 residential averages, as of 2026-11). Sized to cover all of that use, the tool returns 9.8 kWdc and 24 panels, needing about 504 square feet of roof. The installed estimate is $24,284 (national median, EnergySage H2 2025), yearly savings are about $1,688, and simple payback is 14.4 years, with no incentive applied.
Sun and yield in Louisiana
We use 1,479 kWh per installed kW per year for Louisiana, 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 3.74 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 Louisiana 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 Louisiana home need?
The average Louisiana home uses 14,424 kWh a year (EIA 2024). At about 1,479 kWh per installed kW, covering all of it takes 9.8 kWdc, or 24 panels. Your own bill will move that up or down.
How much does solar cost in Louisiana?
For the average-home example the installed estimate is $24,284 at the national median of $2.49 per watt (EnergySage, H2 2025, as of 2026-11). We have no sourced Louisiana price multiplier, so local quotes will differ.
Is there a federal solar tax credit in Louisiana?
The 30% federal tax credit ended for homeowner purchases after December 31, 2025. Check your state, utility and local programs separately.
Where does the Louisiana sun figure come from?
1,479 kWh per kW per year and 3.74 winter peak sun hours come from NREL PVWatts v8 runs for Louisiana'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.