Grid & off-grid

Net metering calculator, Wyoming

Model your solar bill under Rocky Mountain Power's Wyoming net metering, where full retail crediting applies within the month but any annual leftover drops sharply to the Schedule 37 rate.

Your numbers

1 Project details Optional
Shown on your exported report. Leave blank to skip.
2 Your usage and system
Find this on a recent utility bill, usually labeled kWh used.
Use your quoted or planned system size. Panel count times panel wattage divided by 1,000 gives a rough figure.
Solar production swings seasonally; pick a specific month type to see how your bill shifts.
Most utilities charge a flat customer or connection fee regardless of usage.
3 Your location and rate
Defaulted to Wyoming's average peak sun hours. Adjust if you know your local figure.
Defaulted to Wyoming's current average residential rate. Your utility's actual rate may differ.
Wyoming typically credits exports around 100% of retail. Full retail net metering up to 25 kW residential.
Some utilities charge progressively higher per-kWh rates as monthly usage climbs into higher tiers.
Accounts for inverter loss, wiring loss, dust, and temperature derate combined.
Informational only. A monthly cycle means unused export credit does not carry to the next bill; annual and rolling cycles do.

How it works

Three steps to your Wyoming solar bill estimate

Step 1

Enter your usage, system size, and season

Pull your monthly kWh from a recent bill and enter your planned or quoted system size in kW. Since Wyoming's annual cash-out rate is far below retail, a system sized close to your own usage performs better than one built to maximize total output. Select a season to model a specific month rather than only an annual average.

Step 2

Confirm your rate, tier, and export credit

A typical Rocky Mountain Power residential rate and full retail export credit are filled in by default, matching Wyoming's within-month crediting structure. Swap in your own tariff numbers and fixed monthly fee if you have a recent bill showing them.

Step 3

Compare the result to a full retail scenario

Since Wyoming already credits exports at full retail within the month, the net billing vs net metering comparison tool is most useful here for seeing what the annual Schedule 37 cash-out rate costs you by comparison.

How net metering works in Wyoming

Full retail crediting within the month, based on federal PURPA rules

Wyoming's net metering program, capped at 25 kW for residential systems, credits exports at the full retail rate within each billing period, up to 100% of your monthly demand. This structure exists under the federal Public Utility Regulatory Policies Act (PURPA) framework rather than a distinctly state-created incentive program, which is a different legal basis than most states on this list.

The annual cash-out rate is a fraction of retail

Rocky Mountain Power settles accounts annually each January. Any credit balance still unused at that point is paid out at the utility's Schedule 37 Qualifying Facility rate, which Rocky Mountain Power updated again effective April 30, 2026 and has recently run in the low single digits, a small fraction of Wyoming's roughly 12 to 15 cent retail rate. This wide gap makes sizing a system to closely match your own monthly usage far more valuable in Wyoming than in states with a more generous annual settlement.

Wyoming offers no state-level solar tax incentive

Unlike many states, Wyoming has no state solar tax credit, rebate, or similar financial incentive layered on top of net metering. The federal Residential Clean Energy Credit ended for expenditures after December 31, 2025, and the tax credit and rebate estimator for Wyoming can show whether any other incentives apply, but Wyoming homeowners aren't getting a state-level program to improve the economics beyond net metering itself.

Self-consumption is the primary lever given the annual cash-out gap

Since only within-month usage captures the full retail-equivalent value, and any annual leftover drops sharply to the Schedule 37 rate, a system sized close to your actual monthly consumption performs meaningfully better than one built to maximize total annual output. The self-consumption battery size calculator can help push more of your usage into that higher-value within-month category. The grid tie with battery backup comparison tool walks through what a battery is worth once you factor in that January cash-out.

Interconnection and the off-grid comparison

Connecting a system through Rocky Mountain Power, under the terms DSIRE's database tracks, still requires a standard interconnection application; the grid interconnection cost estimator covers what to expect there. With full retail crediting available within the month, staying grid-tied remains far cheaper than going fully off-grid in Wyoming, and the grid tie vs off grid comparison tool shows how much cheaper.

Questions

Frequently asked

Wyoming credits exports at full retail within the billing month, up to 100% of demand, under federal PURPA rules. Rocky Mountain Power settles annually each January, paying out any leftover credit at a much lower Schedule 37 rate, recently in the low single digits per kWh.

The average residential rate in Wyoming is about 12 to 15 cents per kWh. Full retail crediting applies within the billing month, but any annual leftover credit drops to a much lower Schedule 37 rate at the January settlement.

Rocky Mountain Power settles annually each January, paying out any remaining credit balance at the utility's Schedule 37 Qualifying Facility rate, recently in the low single digits per kWh, a small fraction of the roughly 12 to 15 cent retail rate. This gap makes matching a system to your monthly usage especially valuable in Wyoming.

No. Wyoming has no state-level solar tax credit, rebate, or similar incentive. The federal Residential Clean Energy Credit ended for expenditures after December 31, 2025, and Wyoming homeowners don't have a state program layered on top of net metering to improve the economics.

Related tools

Compare Wyoming's policy to other structures

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