Is solar worth it in Idaho in 2026?

Through 2025, a 30% federal tax credit covered a large share of a home solar system's cost. That credit is gone for new post-2025 installations. In Idaho, that means the payback period is driven by your electricity rate, local production, install price, and your utility's export credit — not a federal subsidy. It does not automatically mean solar stops making sense here, but it raises the bar.

Idaho homeowners pay about 12.7¢/kWh for residential electricity (12-month average around 12.3¢/kWh). Lower rates mean each offset kilowatt-hour saves less, so payback tends to be longer here.

A typical fixed rooftop system in Idaho produces roughly 1,450 kWh per kilowatt of panels each year — about 8,700 kWh annually for a common 6 kW system. That is a middle-of-the-road resource, typical for much of the country.

Sunny high desert with low electricity prices. Modeled for a fixed roof mount near Boise at a 38° tilt.

As a Mountain state, Idaho shares the Mountain West's high-altitude sunshine and cool, clear days, balanced against generally low electricity prices. Even so, solar economics are ultimately hyper-local: two neighbors with identical roofs can land on different answers depending on their utility, their specific rate plan, and how much power they use during daylight hours. Treat the state-level figures on this page as a starting point, then refine them with your own numbers.

To put real numbers on it: a representative Idaho home uses roughly 10,800 kWh a year, and offsetting about 90% of that would take a system near 6.7 kW. At the state's default $3,000 per kilowatt (3.00 per watt), that works out to roughly $20,110 before any state or utility incentives. Because there is no federal residential credit in 2026, that full amount is what you would finance or pay out of pocket — which is exactly why the local electricity rate and export credit now carry so much weight. Sizing the system closer to your own daytime usage, rather than maxing out the roof, can lower that upfront figure and, in Idaho, sometimes improves the return on each dollar spent.

Idaho's export policy is currently summarized as "Utility-specific." Idaho export compensation is set per utility and under review. Because export credit is below full retail, self-consumption and battery storage have a bigger effect on savings. Verify the exact export rate with your utility before deciding.

Adding a home battery changes the picture in Idaho. Without storage, a typical household consumes only about 45% of what its panels make and exports the rest; with a battery, self-use rises to roughly 70%. Because Idaho credits exported energy below full retail, keeping more of your own solar behind the meter with a battery can meaningfully lift your savings. The trade-off is the added hardware cost, which has to earn its keep over the system's life. Model both scenarios in the calculator by toggling the battery option to see how much it moves your specific numbers.

So who does solar actually suit in Idaho today? The strongest candidates own their home and roof, expect to stay at least 21 years, have a sunny and largely unshaded roof with room for panels, and pay for a meaningful amount of electricity each month. Idaho's low rates make a large bill the single most important factor — modest users will see much longer paybacks. If your bill is small, your roof is shaded or complicated, or you might move within a few years, the case is weaker now that the federal credit has ended. The only reliable way to know is to run your real bill and an actual installer quote through the calculator rather than trusting a national rule of thumb.

Whether you buy with cash, finance with a loan, or sign a lease or PPA changes who owns the system, who claims incentives, and who handles maintenance. In Idaho, run your specific quotes through the comparison tool before signing anything.

Our Idaho model uses Boise as a representative location. Solar output is fairly uniform within a state, so the biggest differences come from your utility and roof — not your city. Use your own address's sun exposure and your utility's export rate for the most accurate result.