Trevor has worked in home improvement and residential solar since 2016 and maintains the EcoGen Solar Cost Index.
Indiana solar has a before and an after. Before July 1, 2022, new rooftop systems earned retail net metering. After Senate Enrolled Act 309 closed that program to new customers, exports moved to the state’s “excess distributed generation” credit, set by statute from wholesale power prices, and worth a fraction of the 16.58¢ retail rate. Combine that with an installed price of $3.06 per watt, 5.5% above the national average, and Indiana solar in 2026 is a self-consumption project or it is nothing. This guide prices it that way.
What Changed at the Indiana Meter
Era | How Exports Were Credited | Who It Applies To |
|---|---|---|
Interconnected before July 1, 2022 | Retail net metering | Grandfathered legacy customers, terms preserved |
New systems since July 1, 2022 | Excess distributed generation credit, priced from the utility’s prior-year average wholesale power cost under IC 8-1-40 | Every new residential system at the investor-owned utilities |
The practical translation: exported power now earns a wholesale-derived rate that runs far below retail, and the exact cents per kilowatt-hour differ by utility and year. Duke Energy Indiana, AES Indiana, NIPSCO, and Indiana Michigan Power together serve about 73% of the state’s homes, and each files its own credit rate. Get your utility’s current figure in writing before believing any savings projection; a proposal that values exports at retail is modeling a program that closed in 2022.
For the picture beyond Indiana, start with our solar panel costs across the country.
The 2026 Price of an Indiana System
Indiana homes use a hefty 901 kWh a month, so typical systems run large: 7.92 kW at about $24,235 gross at the state benchmark of $3.06 per watt (state benchmark, March 1, 2026). That per-watt figure ranks 40 of 51, and it is the second number every bid should be tested against, right after the export credit. On a system this size, a quote 40¢ per watt above benchmark is more than $3,000 of unexplained premium.
The full run of sizes at the benchmark, gross before incentives:
| System size | Gross cost at $3.06/W |
|---|---|
| 5 kW | $15,300 |
| 6 kW | $18,360 |
| 7 kW | $21,420 |
| 7.92 kW, the typical Indiana system | $24,235 |
| 10 kW | $30,600 |
| 12 kW | $36,720 |
See what the current credit does to your math
Payback When Self-Use Is the Whole Game
A 7.92 kW array in Indianapolis-class sun produces about 10,810 kWh a year, close to the average home’s consumption. If every kilowatt-hour offset retail power, modeled at the 16.58¢ statewide average, the value would be about $1,790 a year and the simple payback would model to roughly 13.5 years, and that is the best case. Exported power earns the wholesale-derived credit instead, so real paybacks stretch with every kilowatt-hour that leaves the house. The design conclusions come straight from that structure: size at or below your usage, shift daytime load into production hours, and treat a battery as a serious option rather than an upsell, because converting exports into self-use is worth more in Indiana than in almost any full-retail state.
That model runs on the statewide average, which is ranking context rather than a rate anyone pays. Duke, AES Indiana, NIPSCO and Indiana Michigan Power each bill their own residential rate, and that filed rate is the number your real payback runs on.
No State Solar License: The Vetting Burden Is Yours
Indiana requires no state-level solar contractor license. Local jurisdictions handle permitting and electrical work still requires licensed electricians, but there is no statewide credential to check the way there is in most states. That shifts vetting onto the buyer: ask for the electrical license of the person who will actually wire the system, proof of insurance, local references from the last 12 months, and the installer’s history with your specific utility’s interconnection queue. In a state where the billing rules already demand precision, an installer who cannot answer those four questions quickly is answering them.
When Indiana Solar Does Not Work
- Export-heavy households. Away all day with no load to shift means most production sells at wholesale-derived rates; the math thins fast.
- Anyone shown retail-valued exports. That is a 2021 proposal wearing a 2026 date. Walk away from the installer, not just the quote.
- Tight-margin budgets counting on credits. The federal residential credit is $0 for host-owned systems whose installation is completed after December 31, 2025, and Indiana’s third-party market (leases/PPAs) sits in legal gray territory, so plan on full sticker.
- Co-op and municipal customers who have not asked. The 2022 law governs the investor-owned utilities; co-ops and munis set their own terms, which can be better or worse. Ask first, model second.
Indiana Solar Cost FAQs
About $3.06 per watt installed as of March 1, 2026, which puts Indiana at rank 40 of 51. The typical 7.92 kW system sized to average usage runs about $24,235 before incentives.
Not for new customers. Retail net metering closed to new interconnections on July 1, 2022 under SEA 309. New systems earn an excess distributed generation credit priced from the utility’s prior-year average wholesale cost under IC 8-1-40, which runs well below the retail rate.
Best case models to about 13.5 years if all production offsets power at the 16.58¢ statewide average; your own utility’s filed residential rate is the figure your real payback runs on. Because exports earn a wholesale-derived credit instead, the real number depends on how much of your production you use directly, which makes self-consumption the deciding factor in Indiana.
Systems interconnected before the July 2022 closure keep their retail net metering under grandfathering. If you hold legacy status, confirm with your utility in writing before modifying the system, since changes can affect it.
More than in most states. Every stored kilowatt-hour you use later offsets full retail instead of selling at a wholesale-derived credit, so a battery directly attacks Indiana’s weakest number. It still adds cost, so compare paybacks with and without.
Your utility’s current credit rate and your daytime usage decide everything here. Enter your ZIP code and we will start from those two facts.
Get bids modeled on self-use, not the old meter
Methodology: Cost figures in this guide use the EcoGen Solar Cost Index for Indiana, $3.06 per watt as of March 1, 2026, with payback modeled with no federal residential credit for host-owned systems, exports below retail per IC 8-1-40, rate escalation at the state 5-year average of 3.26%, 0.5% annual panel degradation, and a 25-year horizon. Per-utility credit rates change annually and are stated only as structure here; confirm your utility’s current figure before relying on any projection.
References & Research Sources
EcoGen America reviewed Indiana’s distributed generation statute, federal electricity price and utility datasets, Census home-value data, federal tax guidance, and state PPA-legality research for this Indiana solar cost guide. Sources were accessed between June 10 and August 15, 2026, unless another date is listed below.
- Indiana General Assembly. Indiana Code 8-1-40. Distributed generation statute, including SEA 309 of 2017 and the July 1, 2022 net metering closure. Accessed June 11, 2026.
- U.S. Energy Information Administration (EIA). Electric Power Monthly, Table 5.6.A. Average residential electricity prices by state, March 2026 edition. Accessed June 10, 2026.
- U.S. Energy Information Administration (EIA). Form EIA-861: Annual Electric Power Industry Report, 2024. Residential customer counts for Duke Energy Indiana, AES Indiana, NIPSCO, and Indiana Michigan Power. Accessed June 10, 2026.
- U.S. Census Bureau. American Community Survey, 2024. Median home value data used for cost-to-value context. Accessed June 11, 2026.
- Internal Revenue Service (IRS). One, Big, Beautiful Bill Provisions. Guidance on Public Law 119-21, including termination of the Section 25D residential credit for systems whose installation is completed after December 31, 2025. Accessed August 15, 2026.
- Database of State Incentives for Renewables & Efficiency (DSIRE). Third-Party Solar PV Power Purchase Agreement Policies, May 2026. State-by-state PPA legality map. Published May 2026. Accessed August 15, 2026.
