Solar Payback If Electricity Prices Keep Rising
See how 0%, 2.5% and 4% yearly electricity price growth change solar payback and 25-year gain for an example home in five states.
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Official data: EIA · DOE · IRS · how we check
In this article · 8 sections
Short answer
Rising electricity prices shorten solar payback and raise the 25-year gain. In our example home, moving from flat prices (0% a year) to 4% a year cut payback by roughly three to four years in Texas, Florida and Arizona. The gain from the system more than doubled or tripled in those states. The effect is smaller in California and New York, where solar already pays back faster.
These are modeled estimates, not forecasts or guarantees. Your own result depends on your utility, your rate plan and your installer's quote. Try your numbers in the solar calculator.
The example home and the three scenarios
We use one example home so the scenarios are comparable:
- 7 kW rooftop system, installed cost of $3500 per kW ($24500 total), no incentives
- 10500 kWh of electricity use per year (a kWh, or kilowatt-hour, is the unit your bill charges for; see what is a kilowatt hour)
- 40% of use happens while the sun is up
- $100 a year in maintenance and panel output falling 0.5% a year
- A 25-year horizon
- Export credits capped at a year of grid purchases, with an annual true-up
Production comes from PVWatts v8 (south-facing, 20° pitch, 14% losses, one reference city per state). Prices are the EIA August 2026 average residential price. Full details are on the methodology page.
We then changed one thing: how fast the electricity price rises each year. The three cases are 0% (flat prices), 2.5% a year (our base case) and 4% a year.
Why price growth matters so much
Solar does not make electricity. It replaces electricity you would have bought. Each kWh your panels cover saves you the price of that kWh. If the price goes up every year, the same panel output is worth more each year.
The system cost is paid up front and does not change. So higher future prices mean the savings catch up with the cost sooner. They also keep adding savings after that point.
Payback is the number of years until total savings equal the cost. For a plain explanation of how it is calculated, see solar payback period explained.
Results by state
The table shows payback in years and the 25-year gain for each scenario. The 25-year gain is total savings over 25 years minus the cost and upkeep, before any financing costs.
| State | 0% a year | 2.5% a year | 4% a year |
|---|---|---|---|
| Texas | 17.3 years, $10289 | 14.3 years, $23624 | 13.1 years, $34494 |
| California | 8.1 years, $51055 | 7.4 years, $79631 | 7.1 years, $102994 |
| Florida | 16.9 years, $11015 | 14.1 years, $24658 | 13 years, $35783 |
| Arizona | 16.6 years, $12506 | 13.9 years, $26978 | 12.8 years, $38811 |
| New York | 10.1 years, $34008 | 9 years, $55823 | 8.6 years, $73608 |
What the numbers show
Slow-payback states gain the most time
Texas, Florida and Arizona have lower electricity prices, so solar pays back more slowly when prices are flat. In Texas, payback falls from 17.3 years at 0% to 13.1 years at 4%. In Arizona it falls from 16.6 years to 12.8 years.
Notice the pattern: the first step (0% to 2.5%) helps more than the second (2.5% to 4%). The extra time saved gets smaller as growth rises.
High-price states are less sensitive in payback, more in dollars
California starts with the shortest payback, 8.1 years at 0%, and only moves to 7.1 years at 4%. But the 25-year gain jumps from $51055 to $102994. When savings per year are already large, a rising price multiplies them.
New York shows a similar picture: payback moves from 10.1 to 8.6 years, while the 25-year gain goes from $34008 to $73608.
Flat prices can still work, but thinly in some states
At 0% growth, the 25-year gain in Texas is $10289 and in Florida is $11015. That is still positive, but the margin is small. A higher installed price, a shaded roof or a less favorable export rule could erase it. Check is solar worth it without the tax credit for more on thin margins.
What the scenarios do not cover
- Real price paths vary. Electricity prices do not rise smoothly. Some years go up a lot, some stay flat. Look at electricity price increases by state for past patterns, which do not predict the future.
- Incentives. The example uses no incentives. The IRS states that the 30% federal Residential Clean Energy Credit (Section 25D) is not available for property placed in service after December 31, 2025. State and utility programs differ; DSIRE keeps a database of current ones.
- Net metering rules. How your utility credits exported power can change savings a lot. See net metering vs net billing payback.
- Installed cost. Berkeley Lab reports a median installed price of $4.0 per watt for host-owned residential systems installed in 2024, with cash-purchased systems at $3.5 per watt. Our example uses $3500 per kW, which equals $3.5 per watt. Quotes above that lengthen payback. See solar cost per watt and payback.
- Financing. Loan interest is not included in these results.
How to use this for your own decision
- Find your utility's current residential price on the electricity prices page.
- Run your own system size and quote in the solar calculator.
- Test the 0% case first. If solar only works when prices rise fast, treat it as a riskier bet.
- Ask your utility how it credits exported power and whether rates change by time of day.
- Compare at least a few written quotes.
Bottom line
Rising electricity prices make solar pay back sooner and earn more over 25 years, and the effect is biggest where payback was slow to begin with. In our example, payback ranged from 17.3 years at flat prices to 13.1 years at 4% growth in Texas, and from 8.1 to 7.1 years in California. Because future prices are uncertain, test the flat-price case before you decide. Your own quote and utility rules will change the answer.
Sources
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