Alabama solar calculator
Size a Alabama home solar system from your electric bill — kW, panel count, roof area, true cost with no federal credit for 2026 installs, and payback.
Quick answer: At $0.168/kWh and 4.6 peak sun hours, a $200/month bill needs about 11.07 kW — 27 × 410 W panels covering ~54 m². Gross cost is ~$42,287 with no federal credit for systems installed after 2025, offsetting $2,400 a year for a ~17.6 year payback.
Your details
Ballpark, not gospel. Sized at 78% real-world output with the Alabama sun-hour average — confirm shading, roof angle and Alabama Power's Rate PAE and Rider RGB terms with a local installer before buying. The calculator values all generation at your retail rate. Alabama has no net metering — exports earn avoided cost (roughly 3–5¢/kWh) while you pay a $5.41/kW/month Rider RGB capacity charge — so real savings track how much you self-consume. The calculator values all generation at your retail rate; exports earn far less, so real savings track self-consumption and batteries.
The 30% credit ended — what changed
The residential clean energy credit (26 U.S.C. § 25D) gave homeowners a 30% credit on solar installed from 2022 through 2025. The July 2025 tax law ended it: no credit is available for property placed in service after December 31, 2025. That is why every figure on this page is ~30% higher than pre-2026 guides show. If your system went live by the end of 2025, tick the box above to see the credit applied; leased systems may still benefit because the leasing company claims the commercial credit. Source: IRS — Residential Clean Energy Credit.
Typical Alabama system sizes by monthly bill
| Monthly bill | System size | Panels (410 W) | Net cost (no 2026 federal credit) | Payback |
|---|---|---|---|---|
| $100 | 5.74 kW | 14 | $21,927 | 18.3 years |
| $200 | 11.07 kW | 27 | $42,287 | 17.6 years |
| $300 | 16.81 kW | 41 | $64,214 | 17.8 years |
Computed at $0.168/kWh, 4.6 peak sun hours and $3.82/W installed, with no federal credit for 2026 installs. Run your exact bill above.
Solar in Alabama: the details
Solar cost in Alabama
Solar is pricey to install in Alabama. The EnergySage marketplace averaged about $3.82 per watt installed in 2026, with market quotes typically landing $3.25–$4.39/W — above the $2.50–$3.50/W national band. A typical ~11 kW Alabama system grosses around $42,000 before any incentive, with no federal credit for 2026 homeowner installs.
What moves the number: roof complexity, panel tier, and a thin installer market — Alabama has fewer competitive quotes than its Sun Belt neighbors, so get at least three bids. Note the install price is only half the story: Alabama Power's $5.41/kW/month Rider RGB charge is billed separately, on top of everything here.
Export rules: getting paid for surplus power
Alabama has no statewide net metering law. What you earn for exported power is set by Alabama Power's Rate PAE, which pays avoided cost — roughly 3.45–5.47¢/kWh, about a quarter of the retail rate.
The real kicker is Rider RGB: a Capacity Reservation Charge of $5.41 per kW of system size per month — about $60/month on an 11 kW system — upheld by a federal court on March 25, 2026. It applies whether or not your panels produce. And third-party PPAs are banned in Alabama, so you can't lease around the math.
Practical takeaway: in Alabama, exports are nearly worthless and the monthly capacity charge is unavoidable — the only setup that works is maximizing self-consumption, ideally with a battery to cover evening load.
Alabama solar incentives
Alabama has no state income tax credit or rebate for solar. What it does offer: the value solar adds to your home is exempt from the non-educational portion of property taxes, and solar equipment is exempt from state sales tax. Neither moves the payback needle the way Rider RGB moves it against you.
Is solar worth it in Alabama?
Verdict: the economics are among the worst in the country. Between the $5.41/kW/month Rider RGB charge (about $60/month on an 11 kW system), avoided-cost exports of ~3–5¢/kWh, and no state credit, a $200 bill faces a ~17.6-year payback — and the monthly capacity fee eats the savings the calculator shows. Solar only pencils here if you can self-consume nearly everything or you want backup power.
Questions people actually ask
Straight answers, no fluff. Then run your own numbers above.
How many solar panels do I need in Alabama?
It follows your bill. At the Alabama average of $0.168/kWh and 4.6 peak sun hours, a $200/month bill needs about a 11.07 kW system — roughly 27 × 410 W panels covering ~54 m² of roof.
What is the average cost of solar panels in Alabama in 2026?
The EnergySage marketplace averaged about $3.82 per watt installed in 2026, with market quotes typically $3.25–$4.39/W — above the national $2.50–$3.50/W band. A typical ~11 kW system grosses around $42,000, with no federal credit for 2026 homeowner installs. (Alabama Power's $5.41/kW/month Rider RGB charge is billed separately.)
Does Alabama have net metering?
No. Alabama has no statewide net metering law. Alabama Power buys exported solar under Rate PAE at avoided cost — roughly 3.45–5.47¢/kWh — and charges a $5.41 per kW per month Capacity Reservation Charge under Rider RGB, upheld by a federal court in March 2026.
Does Alabama offer any solar tax credit or rebate?
No state income tax credit or rebate — but Alabama exempts the value solar adds to your home from the non-educational portion of property taxes and exempts solar equipment from state sales tax.
Is the 30% federal solar tax credit still available?
Not for homeowner purchases anymore. The residential clean energy credit (26 U.S.C. § 25D) is not available for property placed in service after December 31, 2025, under the July 2025 tax law (Public Law 119-21). Systems installed by the end of 2025 can still claim 30%, and leased systems may still benefit because the leasing company claims the commercial credit instead. (Source: IRS — Residential Clean Energy Credit.)
Is solar worth it in Alabama?
Verdict: the economics are among the worst in the country. Between the $5.41/kW/month Rider RGB charge (about $60/month on an 11 kW system), avoided-cost exports of ~3–5¢/kWh, and no state credit, a $200 bill faces a ~17.6-year payback — and the monthly capacity fee eats the savings the calculator shows. Solar only pencils here if you can self-consume nearly everything or you want backup power.
Figures last checked October 2026. Sources: residential rate and sun-hour averages via kilowattkit.com and unboundsolar.com's US sun-hours map, EIA Electric Power Monthly, NREL PVWatts/NSRDB, DSIRE, Alabama Public Service Commission; IRS — Residential Clean Energy Credit.
More US solar calculators
Compare other states: Texas, Florida, California, Arizona, North Carolina, Alabama, Alaska, Arkansas, Colorado, Connecticut, Delaware, Georgia, Hawaii, Idaho. And the national US solar calculator for country averages.
Comparing quotes? The solar cost calculator breaks down cost per watt and the solar ROI calculator maps your payback year by year. Going deeper: installation cost guide, how net metering works, how much you can save with solar and the solar batteries guide.