What has gone, in order
Net metering closed to new solar customers no later than July 1, 2022, under Senate Enrolled Act 309. Existing customers were grandfathered on a schedule but new systems are not eligible.
The Excess Distributed Generation credit replaced it, set by the Indiana Utility Regulatory Commission at the prior year average wholesale cost plus 25 percent, roughly 70 to 80 percent below the retail rate.
The Indiana Supreme Court then upheld a utility using instantaneous netting, which removes the monthly offset that used to soften that gap.
And the 30 percent federal Residential Clean Energy Credit under Section 25D expired for property placed in service after December 31, 2025, with no Indiana state credit to replace it.
What remains, stated plainly
The 7 percent sales tax exemption on qualifying solar equipment, which is automatic and appears as an absence from your price.
The property tax exemption on the added value of the system, so installing solar should not raise your assessment.
Full retail value for every kilowatt hour your household consumes at the moment it is generated. At around 17.9 cents per kWh that is the largest item by a wide margin.
And the Excess Distributed Generation credit on whatever you export, which is real but small. Section 48E also survives at 30 percent for third-party owners under leases and power purchase agreements, claimed by the provider rather than you.
How to judge whether it works for you
Ask for the savings split into two lines: self-consumed generation at the retail rate and exports at the Excess Distributed Generation rate, with the assumed self-consumption share stated.
Ask which netting method your utility uses and confirm it with the utility rather than the installer, because instantaneous netting substantially changes the split.
Ask for a smaller system modelled alongside the proposal. Under this arrangement a design covering less than your full annual usage frequently returns better, because the marginal panels produce mostly exports.
Ask what the projection assumed about the Excess Distributed Generation rate over its term, since it is recalculated annually from wholesale prices rather than fixed.
Building the number from what Indiana still offers
Strike the federal residential credit from any quote showing it, and do not expect a state credit in its place, because Indiana has none for solar.
Treat any reference to net metering on a new system as an error, since it closed to new customers no later than July 1, 2022.
Rebuild from the sales tax exemption, the property tax exemption, retail value on self-consumed generation, and the Excess Distributed Generation credit on exports under your utility netting method.
Ask for that version in writing with each line named. In a market this changed, an unrevised template is the most likely source of an inflated number.