Indiana Solar Incentives (2026): EDG Credits, Property Tax Relief, and What to Verify
Indiana is a "tariff-first" solar market. Your savings depend on how much solar you can use in your home while it's being produced and how your utility credits any excess sent to the grid. Because net metering availability for new customers ended in Indiana's IOU framework by mid-2022, many 2026 installations operate under EDG compensation instead of full retail net metering.
Indiana solar at a glance
Indiana is a "tariff-first" solar market. Your savings depend on how much solar you can use in your home while it's being produced and how your utility credits any excess sent to the grid. Because net metering availability for new customers ended in Indiana's IOU framework by mid-2022, many 2026 installations operate under EDG compensation instead of full retail net metering.
Incentives Indiana homeowners can actually claim
Federal Residential Clean Energy Credit status in 2026
The IRS currently states the Residential Clean Energy Credit is not available for property placed in service after December 31, 2025.
If a 2026 proposal includes a "30% federal credit" in its net price, ask for the placed-in-service assumption in writing and compare it to the IRS guidance.
Indiana property tax deduction for solar (State Form 18865)
Indiana's DLGF explains that Indiana law provides property tax deductions for solar and certain other renewable devices, with the deduction claimed by filing the required form with your county auditor.
The form commonly used is State Form 18865, titled "Statement for Deduction of Assessed Valuation (Attributed to Solar Energy System …)."
Practical takeaway: this benefit is about reducing assessed value for property tax purposes. It does not change your utility bill, but it can improve the "total cost of ownership" picture.
Net metering in Indiana: what changed and what replaces it
Indiana's required net metering reporting summary notes that net metering availability to new customers would end no later than July 1, 2022 under SEA 309's framework. For many customers today, the replacement is an EDG structure where exported energy is credited under a utility-specific tariff approved by the IURC.
How EDG crediting works in plain English
EDG tariffs generally separate your electricity into two streams:
- • Imports: electricity you still buy from the grid when your home needs more power than solar is producing.
- • Exports (EDG): electricity your solar produces that your home does not use instantly and that flows back to the grid.
Some EDG riders describe the export measurement as instantaneous, meaning the meter nets usage and production at a given moment rather than "monthly netting" everything together.
The EDG credit rate concept
Utility riders show that the EDG export credit rate can be updated periodically and is tied to Indiana's distributed generation statute framework. For example, AES Indiana's Rider 16 states the EDG rate is the average marginal price of energy paid by the company during the most recent calendar year multiplied by 1.25, with annual updates through a compliance filing.
Utility examples (tariffs differ by service territory)
- • NIPSCO's Rider 589 describes EDG measurement and definitions tied to Indiana's distributed generation statute and rider structure.
- • AES Indiana publishes Rider 16 EDG tariff language and explains how the EDG rate is calculated and updated.
- • Other IOUs have their own approved EDG riders through IURC orders and filings (so your "right answer" depends on your utility).
Example: monthly bill math under EDG (illustrative)
Your home uses 900 kWh in a month. Your solar produces 800 kWh.
If you use 520 kWh instantly while the sun is shining, that 520 kWh typically reduces what you buy from the grid at your normal retail charges.
The remaining 280 kWh is exported. Under an EDG framework, exports are credited at an EDG rate defined in your utility's tariff (not necessarily the same as your retail rate).
The homeowner takeaway is simple: in Indiana, improving daytime self-consumption (laundry, dishwashing, EV charging, pre-cooling) can matter more than "oversizing" a system that exports a lot.
Costs in Indiana: what changes the price
Indiana solar pricing varies by roof complexity, electrical work, and whether you add storage. A quote that looks "cheap" sometimes excludes common work items that show up later as change orders.
| Common cost driver | Why it moves Indiana quotes |
|---|---|
| Main panel upgrades | Older homes may need electrical work before interconnection |
| Roof age and complexity | Steeper, multi-plane roofs increase labor and racking |
| Long conduit runs | Detached garages and finished basements add time and materials |
| Batteries | Adds equipment, commissioning, and sometimes service upgrades |
Savings and payback: the assumptions that matter most in Indiana
Indiana savings projections vary most based on assumptions, not panel brand.
| Assumption | Why it matters |
|---|---|
| How exports are credited (your EDG rider) | Export credit is tariff-defined and may differ from retail charges |
| Self-consumption percentage | The more you use directly, the more value you capture |
| Fixed charges and minimum bills | Solar often won't eliminate every line item |
| Financing terms | Dealer fees, APR, and term length can dominate monthly outcomes |
Example: quote comparison trap (illustrative)
Quote A assumes exported kWh offset your bill at something close to your retail rate. Quote B models exports using your utility's EDG credit assumptions and shows how much energy is likely to export versus self-consume.
In Indiana, Quote B is usually the safer baseline because EDG riders and IURC approvals define how excess generation is compensated.
Indiana solar production and climate considerations
Indiana's production is seasonal. Summer output is typically strongest, while winter output is reduced by shorter days, lower sun angle, and occasional snow coverage. A credible proposal should show month-by-month production and a shading assessment rather than only one annual number.
System sizing guidance
Sizing starts with your last 12 months of electric usage (kWh), then gets refined by roof space, shading, and the economics of self-consumption under your tariff.
Example: kWh → kW starting point (illustrative)
If your household used 12,000 kWh last year, ask for an initial design that targets roughly that annual production, then refine based on roof constraints and the share of energy expected to export (because exports are credited under EDG terms rather than classic net metering for many new customers).
Battery sizing in Indiana
If you want outage backup, size the battery around "critical loads" and desired runtime. If you want bill improvement, the value often comes from using more solar at home (less exporting) and covering evening loads after the sun sets.
Permitting and interconnection overview
Most projects follow the same sequence: site survey → design → local permit → installation → inspection → utility interconnection review → permission to operate.
Indiana interconnection standards and utility tariffs determine technical requirements, so timelines vary by utility and permitting jurisdiction.
Example: interconnection timeline (illustrative)
A straightforward solar-only project may take several weeks from contract to installation, with additional weeks for inspections and utility processing. Panel upgrades and batteries often extend the schedule because they add electrical work and commissioning steps.
How to choose an installer and compare quotes in Indiana
You will usually get a cleaner comparison when every bidder quotes the same scenario and the same utility assumptions. Ask each installer to provide, in writing, which tariff they modeled (including the EDG credit approach) and how they estimated exports.
- • If you are in NIPSCO territory, ask the installer to explain how their model aligns with the EDG concepts and measurement approach described in Rider 589.
- • If you are in AES Indiana territory, ask the installer which EDG rate assumption they used and how it maps to Rider 16's EDG rate description and updates.
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Next steps
Get two to three quotes and require each installer to show the same set of assumptions: system size, annual production, expected self-consumption versus exports, and the exact tariff basis for export credits. Then file for Indiana's property tax deduction if eligible and keep your project documentation organized for tax season.
References
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