25-year savings projection for Indiana
This projection starts from Indiana's assumed $0.15/kWh electricity rate and 1,280 kWh/kW of annual production, then grows savings by 3% a year as electricity prices rise and reduces output by 0.5% a year as panels degrade.
| Year | Annual savings | Cumulative savings | vs. $22,600 cost |
|---|---|---|---|
| Year 1 | $1,266 | $1,266 | −$21,334 |
| Year 5 | $1,396 | $6,651 | −$15,949 |
| Year 10 | $1,579 | $14,170 | −$8,430 |
| Year 15 | $1,785 | $22,671 | +$71 |
| Year 20 | $2,018 | $32,282 | +$9,682 |
| Year 25 | $2,281 | $43,148 | +$20,548 |
A simple, undiscounted projection — it does not apply a discount rate, financing interest, inverter replacement (commonly needed once in 25 years), maintenance, or any change in home value. Treat it as a shape, not a forecast. See methodology.
Why savings look like this in Indiana
Reduced export compensation after the end of net metering makes self-consumption the main driver of savings.
The single biggest variable is what your utility pays for exported power. Indiana phased out retail net metering for new customers in 2022. Investor-owned utilities now credit exports at roughly 1.25× wholesale (an "excess distributed generation" rate), well below retail.
What would change this number
- Your actual rate. This uses a $0.15/kWh Indiana average. If you pay more, savings scale up roughly proportionally.
- Self-consumption. We assume 68% of output is used on site at retail value and the rest exported at 45% of retail. Households home during the day, or with a battery, do better.
- Electricity price growth. At 3% a year, savings nearly double by year 25. Slower growth meaningfully reduces lifetime return.
- Incentives. Indiana's main program — sales and property tax exemptions — reduces net cost and shortens break-even. See Indiana incentives →
- Financing. A cash purchase earns the return above. A loan shifts it — interest can consume a large share of lifetime savings.
Frequently asked questions
How much can you save with solar panels in Indiana?
An 8 kW system in Indiana could save roughly $1,266 in the first year — about $105 a month — and around $43,148 across 25 years, assuming electricity prices rise 3% a year and panel output declines 0.5% a year. Against a midpoint installed cost of $22,600, that is a net gain of about $20,548.
What is the ROI on solar panels in Indiana?
On these assumptions, roughly 91% over a 25-year system life — $20,548 of net savings on a $22,600 system. That is a simple, undiscounted return: it ignores financing interest, the time value of money, and any effect on home resale value. A cash purchase and a loan produce very different numbers.
How long does it take for solar to pay for itself in Indiana?
Around year 15, when cumulative savings first exceed the $22,600 installed cost. A simple payback that ignores rising electricity prices gives a wider range of 15–20 years.
Do solar savings in Indiana include the federal tax credit?
No. The 30% federal residential clean energy credit (Section 25D) ended for systems installed after December 31, 2025, so none of these figures include it. Any savings projection you see elsewhere that still applies 30% to a 2026 purchase is overstating the return.
What most affects solar savings in Indiana?
Three things, in order: your utility's export compensation (Indiana phased out retail net metering for new customers in 2022.), how much of the output your household consumes on site rather than exporting, and your actual electricity rate versus the 0.15/kWh state assumption used here. Sales and property tax exemptions can improve the result further.
Where these numbers come from
State assumptions are informed by public data and reviewed periodically (September 2026):