Solar with Tongue River Electric Cooperative

At a glance

Residential schedule effective December 26, 2025; checked November 1, 2026. Sources.

What this means for solar

• Excess power is banked as kWh at the full retail rate and drawn down in later months. The bank resets in January, and anything left is forfeited to the utility.
• Every member pays a $1.00 per kW demand charge on the monthly peak-load reading (interval not published). Rooftop solar rarely lowers a home's peak demand, so our estimates do not count it as savings.
• Systems up to 10 kW AC qualify for net metering; above that, capacity would run without export credit.
• Net-metered accounts pay $10 a month more in fixed charges, there is a $200 interconnection fee.

Questions members ask

Does Tongue River Electric Cooperative pay for excess solar power?

Excess power is banked as kWh at the full retail rate and drawn down in later months. The bank resets in January, and anything left is forfeited to the utility.

How big a solar system can I net-meter with Tongue River Electric Cooperative?

Systems up to 10 kW AC qualify for net metering. The interconnection fee is $200. Net-metered accounts pay $10 a month more in fixed charges.

Does solar reduce the Tongue River Electric Cooperative demand charge?

Every member pays a $1.00 per kW demand charge on the monthly peak-load reading (interval not published). Rooftop solar rarely lowers a home's peak demand, so our estimates do not count it as savings.

What would solar cost and save for a typical Tongue River Electric Cooperative home?

For a gas-heated home using about 900 kWh a month, a net-zero system is about 8.2 kW, costs roughly $20,546 to $25,112 installed, saves $1,097 to $1,248 in the first year, and pays back in 14.2 to 18.8 years at 2.7% a year rate growth. Your address gives a real figure in about a minute.

What federal incentives apply in 2026?

The 30% homeowner credit (Section 25D) ended for systems completed after December 31, 2025. Business-owned systems, including ranches, farms and rental property, still qualify for the 30% investment credit (Section 48E) and bonus depreciation when placed in service by the end of 2027; tax-exempt owners receive the 30% as a cash payment. Not tax advice.

Where do these numbers come from?

The rate figures are read from Tongue River Electric Cooperative's own published schedule and net-metering policy (linked under Sources), last checked November 1, 2026. The worked example runs the same engine as the estimator, using a production reference for Miles City and Montana installed-cost data. If you spot an error, email us and we will correct it.

Service area

Other Montana co-ops: Flathead Electric Cooperative, Missoula Electric Cooperative, Park Electric Cooperative, Yellowstone Valley Electric Cooperative, Ravalli Electric Cooperative, Fergus Electric Cooperative. All 26 utilities.