Free tool
DFW solar & battery savings calculator
Estimate the solar size, panel count, ballpark price and 25-year utility cost for your Dallas–Fort Worth home in seconds. Then get exact numbers at a free in-home review.
Planning estimate using 1,450 kWh per kW per year (typical well-oriented DFW roof) and $2.00–$2.60 per watt. Not a quote. Shade, roof direction, equipment and your retail plan change the real numbers.
Get exact numbers at a free in-home review →Quick reference: typical DFW bills
| Monthly bill | Usage / mo | Solar size | Panels | Ballpark price | 25-yr utility spend |
|---|---|---|---|---|---|
| $120 | 750 kWh | 5.6 kW | 14 | $11,200–$14,500 | $52,501 |
| $180 | 1,125 kWh | 8.4 kW | 21 | $16,800–$21,800 | $78,752 |
| $250 | 1,563 kWh | 11.6 kW | 29 | $23,300–$30,300 | $109,378 |
| $350 | 2,188 kWh | 16.3 kW | 40 | $32,600–$42,400 | $153,129 |
Assumes 16.0¢/kWh, 90% coverage, 3%/yr rate increases. Batteries are additional: a typical 13.5 kWh battery averaged about $15,650 installed in 2026 (EnergySage).
How this calculator works
Your monthly usage ≈ bill ÷ price per kWh. Annual usage × coverage ÷ 1,450 kWh per installed kW gives the system size. Panel count assumes 410-watt panels. The 25-year figure compounds your current bill by the yearly increase you choose — it’s what you’d pay the utility if nothing changes, not a savings promise.
For your exact address, NREL’s PVWatts models production using local weather data — and your in-home review uses your actual 12-month usage, roof planes and shade.
How many solar panels do I need for a $200 electric bill in Texas?
At 16.0¢/kWh, a $200 bill is about 1,250 kWh a month. Covering 90% of that takes roughly 9.3 kW — about 23 panels at 410 W.
How accurate is a solar calculator?
It’s a planning estimate. Real production depends on roof direction, tilt, shade and equipment, and real savings depend on your retail plan’s buyback terms. A home-specific review is the only reliable number.
Does the calculator include batteries?
It suggests how many batteries fit your backup goal. A typical 13.5 kWh battery averaged about $15,650 installed in 2026, and many homeowners pay for both with one solar loan.