Why there is no state credit and cannot easily be one
A state income tax credit works by reducing state income tax owed. Wyoming levies no personal income tax, so there is nothing for such a credit to reduce.
This is structural rather than a policy gap someone might fill. The same is true in Washington, Nevada, Texas, Florida, South Dakota, Tennessee, Alaska and New Hampshire.
States without an income tax that want to support solar generally use a cash rebate instead, as New Hampshire did before repealing it in 2024. Wyoming does not run one.
So national guidance describing a federal credit stacked on a state credit is describing somewhere else, and a quote showing a Wyoming state solar credit is simply wrong.
What that leaves in the calculation
The electricity you stop buying, at the energy rate on your tariff. Under the Rocky Mountain Power January 2026 Schedule 2 tariff that is 12.175 cents per kWh.
Whatever your utility credits for exported generation under the statutory net metering requirement, which applies to every utility type up to 25 kW.
And nothing else at tax level, for a cash or loan purchase. Section 48E survives at 30 percent but is claimed by a third-party owner under a lease or power purchase agreement.
That is a short list, and it is why Wyoming payback runs around fourteen years despite low installed costs and good sun.
What to check hardest as a result
The production estimate, since nothing in the stack absorbs an overstatement. Ask for it in kilowatt hours per year with the data source named and location-specific irradiance for your address.
Laramie sits at high elevation, which generally means stronger irradiance for a given amount of clear sky, and cold weather improves panel efficiency. Ask whether the model reflects either.
Ask what snow allowance was applied and how it was derived, and what tilt is recommended and why, since a steeper tilt sheds snow and shifts output to the shoulder seasons.
And on the value side, ask that fixed charges be left untouched and that the projection be shown at zero rate escalation.
What the projection actually rests on
Strike the federal residential credit from any quote showing it, and treat any Wyoming state solar credit line as an error, because Wyoming has no personal income tax for one to reduce.
Rebuild from net metering to 25 kW under your utility terms and the electricity you stop buying at the energy rate on your tariff.
Leave fixed monthly charges untouched in the arithmetic, since a solar system does not reduce them.
Ask for that version in writing with production in kilowatt hours, a stated snow allowance, and a projection at zero escalation alongside the main one.