Solar Panel Calculator for Henderson, NV
Estimate the cost, savings and payback of solar panels in Henderson, NV, using local NREL sunshine data, Nevada prices and electricity rates.
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Henderson gets about 6.51 peak sun hours a day on a south-facing roof, so each kW of panels makes about 1,787 kWh a year. That ranks #8 of the 111 cities on this site. Output peaks in Jun and is lowest in Jan.
Sunshine in Henderson by month
What an 8 kW system makes in Henderson
| Month | Sun hours a day | Output | Bill savings |
|---|---|---|---|
| Jan | 4.46 | 904 kWh | $121 |
| Feb | 5.40 | 968 kWh | $129 |
| Mar | 6.64 | 1,272 kWh | $170 |
| Apr | 7.52 | 1,376 kWh | $184 |
| May | 7.95 | 1,448 kWh | $193 |
| Jun | 8.27 | 1,416 kWh | $189 |
| Jul | 7.47 | 1,304 kWh | $174 |
| Aug | 7.30 | 1,288 kWh | $172 |
| Sep | 7.31 | 1,288 kWh | $172 |
| Oct | 6.25 | 1,176 kWh | $157 |
| Nov | 5.00 | 944 kWh | $126 |
| Dec | 4.51 | 920 kWh | $123 |
| Year | 6.51 | 14,296 kWh | $1,910 |
Savings at 13.36¢ per kWh (Nevada average), with every kWh credited at that price.
Cost and payback by system size
At $2.35 per watt, the Nevada average, before incentives.
| System | Cost | Year 1 savings | Payback | 25-yr gain |
|---|---|---|---|---|
| 4 kW | $9,400 | $955 | 10.1 yrs | $13,095 |
| 6 kW | $14,100 | $1,432 | 10.1 yrs | $19,643 |
| 8 kW | $18,800 | $1,910 | 10.1 yrs | $26,191 |
| 10 kW | $23,500 | $2,387 | 10.1 yrs | $32,738 |
| 12 kW | $28,200 | $2,865 | 10.1 yrs | $39,286 |
How many panels you need in Henderson
| Monthly use | System | 400 W panels |
|---|---|---|
| 500 kWh | 3.36 kW | 9 |
| 750 kWh | 5.04 kW | 13 |
| 1,000 kWh | 6.72 kW | 17 |
| 1,500 kWh | 10.07 kW | 26 |
| 2,000 kWh | 13.43 kW | 34 |
Covering 100% of a year's use at 1,787 kWh per kW.
Common questions
Is solar worth it in Henderson?
At local averages an 8 kW system costs about $18,800 before incentives, saves about $1,910 in its first year and pays back in about 10.1 years.
How many peak sun hours does Henderson get?
About 6.51 a day over the year on a south-facing roof at 20°, from 4.5 in Jan to 8.3 in Jun, according to NREL's PVWatts model.
How much does a 1 kW solar system produce in Henderson?
About 1,787 kWh a year, or 149 kWh a month on average.
Is there a federal solar tax credit?
Not for homeowners who buy their system. The 30% Residential Clean Energy Credit ended for systems installed after December 31, 2025.
Sources
- NREL PVWatts V8 API (south-facing, 20° tilt, 14% losses, typical-year weather): https://developer.nlr.gov/docs/solar/pvwatts/v8/
- EnergySage, Solar panel cost by state (updated November 6, 2026): https://www.energysage.com/local-data/solar-panel-cost/
- U.S. EIA, Electric Power Monthly, Table 5.6.B (residential price, Jan–Aug 2026): https://www.eia.gov/electricity/monthly/epm_table_grapher.php?t=epmt_5_6_b