Solar Panels in Indiana (IN)
Last updated: February 24, 2026
Everything you need to know about going solar in Indiana (IN) — costs, savings, incentives, and the best equipment for your climate.
Federal Residential Solar Tax Credit Repealed
The 30% residential solar tax credit (Section 25D) was repealed in early 2026. Homeowners who installed solar before the repeal can still claim the credit. Commercial projects retain the 30% ITC under Section 48/48E. Solar can still pay for itself through electricity savings alone.
Sun Hours/Day
3.8 hrs
Fair Solar Irradiance
8 kW System Cost
$26,400
$3.30/watt installed
Federal Residential ITC
Repealed
Section 25D (early 2026)
Annual Savings
$1,442
11,096 kWh/year
Payback Period
18.3 yrs
then free electricity for 15-20+ yrs
Solar Irradiance in Indiana (2026)
Indiana receives an average of 3.8 peak sun hours per day annually, equivalent to roughly 1387 kWh/m² per year of global horizontal irradiance (GHI). Summer peaks reach about 4.9 h/day, while winter lows drop to around 2.3 h/day.
This places Indiana in the fair solar irradiance band compared with other US states. At 3.8 kWh/m²/day, each 1 kW of rooftop solar in Indiana generates approximately 1,082 kWh/year (assuming 78% system performance after inverter, soiling, and temperature losses), which makes an 8 kW system produce around 11,096 kWh per year.
Data source: NREL National Solar Radiation Database (NSRDB), 1998-2020 typical meteorological year averages. Indiana (IN) values reflect the statewide average; coastal, mountain, and desert microclimates can vary by ±15% from this figure.
Indiana Solar Incentives (2026)
Federal residential tax credit was repealed in early 2026. Indiana continues to offer the following state and utility-level programs:
| Incentive | Value | Eligibility | Deadline | Source |
|---|---|---|---|---|
| Federal Section 25D ITC | 0% (Repealed Q1 2026) | N/A | Was 12/31/2025 | IRS |
| Property tax exemption | — | — | Verify with state agency | DSIRE |
| Sales tax exemption | — | — | Verify with state agency | DSIRE |
| Net metering (utility-dependent, phasing down) | — | — | Verify with state agency | DSIRE |
⚠ Always verify state incentive deadlines, caps, and eligibility before signing a solar contract — programs change annually and many have annual funding caps that exhaust mid-year.
Major utility companies in Indiana
Check your utility's net metering policy, interconnection requirements, and rate structure before installing — rules vary significantly within Indiana:
- • Duke Energy Indiana
- • AES Indiana
- • NIPSCO (Northern Indiana Public Service)
- • Indiana Michigan Power
Each utility has different rate structures, net metering caps, and time-of-use schedules. Visit your utility's website for current solar interconnection requirements and queue times.
Net metering in Indiana
Status: Excess Distributed Generation (EDG) tariff (NEM phased out)
Export rate: Wholesale rate ×1.25, ~$0.04/kWh
System size cap: 1 MW residential/commercial
⚠ NEM rules can be amended by state public utility commissions and individual utilities — verify with your utility before committing. Caps and rates shown reflect the most common residential tariff as of 2026.
Solar Incentives in Indiana
Federal Residential ITC (Section 25D) -- Repealed
The 30% federal residential solar tax credit (Section 25D) was repealed in early 2026. Homeowners who installed solar before the repeal may still claim the credit for that tax year. Commercial solar projects continue to receive the 30% ITC under Section 48/48E.
Top 3 Recommended Solar Panels for Indiana
With 3.8 sun hours/day, Indiana homeowners need the most efficient panels to maximize every hour of sunlight:
| Panel | Wattage | Efficiency | Temp Coeff | Warranty |
|---|---|---|---|---|
| LONGi Hi-MO 7 620W | 620W | 23% | -0.28%/°C | 12/30 yr |
| LONGi Hi-MO 7 590W | 590W | 22.8% | -0.28%/°C | 12/30 yr |
| Trina Solar Vertex N+ 600W | 600W | 22.8% | -0.28%/°C | 15/30 yr |
Top 3 Recommended Batteries for Indiana
Pairing solar with battery storage provides backup power during outages and can optimize savings with time-of-use rates:
| Battery | Capacity | Power | Chemistry | Warranty |
|---|---|---|---|---|
| HomeGrid Stack'd Series 38.4kWh | 38.4 kWh | 34.4 kW | LFP (Lithium Iron Phosphate) | 10 yr |
| HomeGrid Stack'd Series 28.8kWh | 28.8 kWh | 25.8 kW | LFP (Lithium Iron Phosphate) | 10 yr |
| BYD Battery-Box Premium HVM 22.1 | 22.08 kWh | 22.08 kW | LFP (Lithium Iron Phosphate) | 10 yr |
Frequently Asked Questions
How much do solar panels cost in Indiana in 2026?
The average cost of an 8 kW solar system in Indiana is approximately $26,400 ($3.30/watt installed). Note: The federal residential solar tax credit (Section 25D) was repealed in early 2026, so the full system cost applies unless state incentives are available. Get 3-5 quotes from local installers for accurate pricing.
Is the federal solar tax credit available in Indiana?
The federal residential solar tax credit (Section 25D) was repealed in early 2026. Homeowners who installed solar before the repeal can still claim the credit for that tax year. Commercial solar projects continue to receive the 30% ITC under Section 48/48E. While Indiana does not have state-level solar tax credits, property tax exemptions and net metering may still provide savings. Consult a tax professional for the latest guidance.
Can solar panels work efficiently in Indiana's climate?
Yes, solar panels work in all climates. Indiana's 3.8 peak sun hours/day means choosing high-efficiency panels (21%+ efficiency) is important to maximize production. Cold temperatures actually improve panel efficiency. An 8 kW system can still produce significant savings of approximately $1,442/year.
How much can I save with solar in Indiana?
An 8 kW solar system in Indiana produces approximately 11,096 kWh/year, saving about $1,442 annually. The estimated payback period is 18.3 years. Over 25 years, total savings can reach $36,050.
Does Indiana have net metering?
Net metering policies vary by utility in Indiana. Most states offer some form of net metering or net billing that credits solar homeowners for excess electricity sent back to the grid. Contact your local utility or check the DSIRE database for current Indiana net metering policies.
What is the best solar panel for Indiana?
For Indiana with 3.8 sun hours/day, high-efficiency panels are the best choice to maximize energy production. Look for panels with efficiency ratings above 21%.
What is the payback period for solar in Indiana?
The estimated payback period for an 8 kW solar system in Indiana is 18.3 years. This is calculated as: system cost ($26,400) divided by annual savings ($1,442/year). After payback, solar generates essentially free electricity for 15-20+ more years.
Do I need a battery for solar in Indiana?
A battery is not required for grid-tied solar in Indiana, but it provides backup power during outages and can increase savings with time-of-use rate optimization. Battery prices continue to decline, making storage increasingly cost-effective.
Does Indiana have solar incentives?
Indiana currently has limited state-level solar incentives, and the federal residential ITC (Section 25D) was repealed in early 2026. Solar can still pay for itself through electricity savings alone in 18.3 years.
Related Solar Guides
Best Solar Panels for Your Climate
Top-rated panels matched to Indiana's fair sun conditions
How Much Do Solar Panels Cost?
Complete pricing guide for residential solar in 2026
Solar Panel Buying Guide
Step-by-step guide to choosing the right panels
Federal Solar Tax Credit Guide
Section 25D repeal: what it means for Indiana
Solar Payback Calculator
Calculate your break-even timeline
Net Metering Explained
How net metering works and state-by-state policies
Tax Credits by State
Find every solar incentive in Indiana
Is Battery Storage Worth It?
Cost vs savings analysis for Indiana
Solar ROI Calculator
Calculate your return on investment
How Many Panels Do I Need?
Calculator based on your energy usage and location
Cold Climate Installation Guide
Optimize solar for Indiana's winters
Solar Financing Options
Cash, loan, lease & PPA compared
FEOC Compliance Guide
Foreign Entity of Concern rules for solar equipment