Solar Panel Cost in Yakima, WA 2026: ~19.3-Year Payback

Why this number

Yakima produces 1,320 kWh per kW against Seattle’s 1,086 — 22% more, on the same hardware, under the same net-metering statute. The payback still runs 19.3 years, because Yakima’s utility, Pacific Power, bills only 11.08¢/kWh — cheap enough to swallow the whole sunshine advantage. The Cascade crest changed the sky; the bill is another story.

Washington is not one solar market

Across the 6 Washington cities with their own modeled figures, production spans 32% — Everett at 999 kWh per kW to Yakima at 1,320. Every column except production is identical down this table: same 14.7¢/kWh retail rate, same export regime, same $2.55/W installed cost. The payback differences are caused by weather and nothing else.

Against the state figure, Yakima runs 26% above Washington’s 1,045 kWh per kW — a payback 0.8 years longer than the statewide 18.5-year estimate on the same hardware at the same price.

East of the Cascades is a different climate entirely

Pacific moisture rises over the Cascades, precipitates on the western slope, and descends dry into the Columbia Basin. Yakima sits in that shadow: roughly eight inches of annual precipitation, hot clear summers, and cold clear winters. It has more in common climatically with eastern Oregon than with the Puget Sound cities it shares a state government with.

At 1,320 kWh per kW, Yakima sits essentially on the national planning figure of 1,328 — a genuinely ordinary solar location, which in Washington makes it exceptional. Winter fog in the basin is the one local penalty worth knowing about; it can persist for days under an inversion.

Your utility, officially

Washington’s average residential rate is 14.7¢/kWh, but the bill in Yakima comes from PacifiCorp (Pacific Power, WA) at 11.08¢ — 25% below the state figure. These are the residential figures Yakima’s utility reported to the U.S. Energy Information Administration on Form EIA-861 for 2024 — computed as revenue ÷ sales from the official file, not estimated:

How exports are treated matters as much as the headline price: PacifiCorp (Pacific Power, WA) is modeled here under the state’s full-retail net metering rules, and that treatment is baked into every payback figure on this page.

Yakima has the sun that Puget Sound cities dream about and the electricity price that keeps solar salespeople honest. The utility is Pacific Power — PacifiCorp’s Washington operation, an investor-owned utility with 114,453 residential customers in the state — billing a 2024 EIA-861 average of just 11.08¢/kWh. Among the Washington utilities we track, only municipal Tacoma Power, at 10.81¢, is cheaper; Seattle City Light averages 14.09¢ and Puget Sound Energy 14.63¢. Hydropower country keeps bills low, and low bills are the fundamental headwind for solar economics everywhere they occur.

The resource, though, is genuinely good. East of the Cascade crest, in the rain shadow, Yakima yields 1,320 kWh per kW of unshaded south-facing capacity — 22% more than Seattle’s 1,086, 10% more than Spokane’s 1,195, and within sight of sun-belt numbers that no one associates with Washington State. Run the two figures together and you get the honest headline: at full retail, a Yakima kilowatt of capacity displaces about $146 of electricity a year. That is real money, but it is what 11-cent power does to strong sunshine — for comparison, the same yield at Puget Sound Energy’s rate would be worth nearly a third more.

The rules are the good news. As an investor-owned, state-regulated utility, Pacific Power is bound by RCW 80.60, Washington’s net-metering statute, which credits residential exports at the full retail rate — an exported kilowatt-hour cancels a purchased one at par, no battery or load-shifting required. The caveat is not small, and we will not bury it: the statute’s sunset is approaching, and several Washington utilities have already hit the law’s 4% capacity cap and moved new customers onto successor tariffs. Statewide practice is now mixed. Before you sign anything, confirm with Pacific Power in writing that new interconnections in its Washington territory still receive full-retail netting, and ask what the successor terms would be. Pacific Power also reported no residential net-metering counts to EIA for 2024, so we cannot show how much room remains under any cap.

The incentive ledger is short. The federal §25D residential credit is $0 for 2026 cash and loan purchases — it expired December 31, 2025 — and Washington offers no state solar tax credit or rebate. The state’s one meaningful contribution is a 6.5% sales-tax exemption, worth real money up front; there is no property-tax exemption for solar in Washington. EnergySage install quotes average $2.55/W statewide, on the cheap side nationally. Put together: modest returns, honest rules for now, and a payback that depends more on locking in today’s net-metering terms than on anything the weather does. Size to your own load and get the tariff question answered first.

Source: EIA Form EIA-861, 2024 final release , accessed 2026-09-02. Average price is total residential revenue divided by total residential sales for the year — your own rate depends on your tariff and usage tier.

An 8 kW system in Yakima, priced out

Only the first two rows differ. Everything financial — rate, tariff, price per watt — is inherited from Washington without change, which is the point: a city page that quietly used a different electricity rate from its state page would be guessing, not measuring.

Doing nothing is not free either. Twenty-five years of the electricity an 8 kW Yakima array would produce, with rates rising at 2.5% a year, comes to roughly $47,753.

Electricity isn’t only for panels — the heat pump vs. furnace cost calculator compares heating costs at Yakima’s own 14.7¢/kWh rate.

Run it with your own bill