Solar Panel Calculator for Jacksonville, FL
Estimate the cost, savings and payback of solar panels in Jacksonville, FL, using local NREL sunshine data, Florida prices and electricity rates.
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Jacksonville gets about 5.42 peak sun hours a day on a south-facing roof, so each kW of panels makes about 1,511 kWh a year. That ranks #40 of the 111 cities on this site. Output peaks in May and is lowest in Dec.
Sunshine in Jacksonville by month
What an 8 kW system makes in Jacksonville
| Month | Sun hours a day | Output | Bill savings |
|---|---|---|---|
| Jan | 4.27 | 856 kWh | $131 |
| Feb | 4.63 | 816 kWh | $125 |
| Mar | 5.69 | 1,088 kWh | $167 |
| Apr | 6.49 | 1,184 kWh | $181 |
| May | 6.73 | 1,256 kWh | $192 |
| Jun | 6.09 | 1,096 kWh | $168 |
| Jul | 6.15 | 1,112 kWh | $170 |
| Aug | 6.02 | 1,096 kWh | $168 |
| Sep | 5.39 | 968 kWh | $148 |
| Oct | 5.08 | 976 kWh | $150 |
| Nov | 4.68 | 888 kWh | $136 |
| Dec | 3.87 | 760 kWh | $116 |
| Year | 5.42 | 12,088 kWh | $1,852 |
Savings at 15.32¢ per kWh (Florida average), with every kWh credited at that price.
Cost and payback by system size
At $2.12 per watt, the Florida average, before incentives.
| System | Cost | Year 1 savings | Payback | 25-yr gain |
|---|---|---|---|---|
| 4 kW | $8,480 | $926 | 9.4 yrs | $13,331 |
| 6 kW | $12,720 | $1,389 | 9.4 yrs | $19,997 |
| 8 kW | $16,960 | $1,852 | 9.4 yrs | $26,663 |
| 10 kW | $21,200 | $2,315 | 9.4 yrs | $33,329 |
| 12 kW | $25,440 | $2,778 | 9.4 yrs | $39,994 |
How many panels you need in Jacksonville
| Monthly use | System | 400 W panels |
|---|---|---|
| 500 kWh | 3.97 kW | 10 |
| 750 kWh | 5.96 kW | 15 |
| 1,000 kWh | 7.94 kW | 20 |
| 1,500 kWh | 11.91 kW | 30 |
| 2,000 kWh | 15.88 kW | 40 |
Covering 100% of a year's use at 1,511 kWh per kW.
Common questions
Is solar worth it in Jacksonville?
At local averages an 8 kW system costs about $16,960 before incentives, saves about $1,852 in its first year and pays back in about 9.4 years.
How many peak sun hours does Jacksonville get?
About 5.42 a day over the year on a south-facing roof at 20°, from 3.9 in Dec to 6.7 in May, according to NREL's PVWatts model.
How much does a 1 kW solar system produce in Jacksonville?
About 1,511 kWh a year, or 126 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