Solar Panel Cost in Kaneohe, HI 2026: ~12.3-Year Payback

Why this number

Kaneohe is the sharpest illustration on this site of why city-level data matters. It produces 1,157 kWh per kW. Honolulu, twelve miles away over the Pali, produces 1,610 — 39% more from the same hardware — and pays back years faster, with no change to the rate, the tariff or the installer’s price. Kaneohe’s own figure is 12.3 years.

The Koolau wall

Northeast trade winds hit the windward face of the Koolau range and are forced upward, which cools them, which condenses them. Kaneohe sits directly underneath the result. The cloud is close to a daily fixture rather than a seasonal one, and it arrives in the morning hours when a south-facing array should be ramping.

This is a microclimate effect, not a regional one, and it is invisible at every level of aggregation above the city. The Hawaii state band of 1,550 is 34% higher than Kaneohe’s real figure. A national average would be off by even more, in the opposite direction from what anyone would guess about Hawaii.

Your utility, officially

Hawaii’s average residential rate is 48.0¢/kWh, but the bill in Kaneohe comes from Hawaiian Electric Co Inc at 42.87¢ — 11% below the state figure. These are the residential figures Kaneohe’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: Hawaiian Electric Co Inc is modeled here under the state’s net billing rules, and that treatment is baked into every payback figure on this page.

Kaneohe’s utility situation can be stated in one sentence that would be impossible almost anywhere on the mainland: there is exactly one deal, and it is the same deal as downtown Honolulu’s. Hawaiian Electric — investor-owned, regulated by the Hawaii Public Utilities Commission — bills all 276,206 residential customers on Oahu at an average of 42.87¢/kWh per the 2024 EIA-861 file, on one island-wide tariff. Hawaii has no municipal utilities at all; the only non-HECO utility in the state is the Kauai cooperative, a full island away. So none of the boundary questions that dominate our Phoenix, Riverside, or Sacramento pages exist here. No side of the line to be on, no board-set alternative, no cheaper district next door. Windward or leeward, mauka or makai, the tariff is the tariff.

What varies in Kaneohe is not the price of power but the shape of the export deal, and that shape is unusually specific. New systems enroll in Hawaiian Electric’s Smart Renewable Energy (SRE) Export program, effective October 1, 2024, which pays for exports by time of day on Oahu: 13.5¢ midday, 18.9¢ overnight, and 32.9¢ across the evening peak — terms locked for seven years at interconnection. The legacy programs a longtime neighbor might be on (CGS+, Smart Export, Battery Bonus) closed to new applicants that same day, so their arrangement is not available to you. The spread in those three numbers is the whole strategy: midday export earns less than a third of your 42.87¢ retail rate, while evening export recovers most of it. A battery charging at noon and discharging after sunset is, arithmetically, the product this program was built to reward. Program terms live on Hawaiian Electric’s customer renewable programs pages and its rooftop solar guide .

Residential rate structure on Oahu has been shifting toward time-of-use designs, so verify which schedule your account is on rather than assuming a single flat rate; at these prices the difference between billing structures is real money. The scale of neighborhood precedent is real too: 64,369 Oahu homes — about one in four — already reported net metering to EIA in 2024, at a typical 5.2 kW each. On the windward side as everywhere else on this island, the question stopped being whether solar works at 42.87¢. It is how much of your evening you can serve from your own roof.

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.

Hawaii is not one solar market

Across the 4 Hawaii cities with their own modeled figures, production spans 39% — Kaneohe at 1,157 kWh per kW to Honolulu at 1,610. Every column except production is identical down this table: same 48.0¢/kWh retail rate, same export regime, same $3.39/W installed cost. The payback differences are caused by weather and nothing else.

Against the state figure, Kaneohe runs 25% below Hawaii’s 1,550 kWh per kW — a payback 3.7 years longer than the statewide 8.6-year estimate on the same hardware at the same price.

An 8 kW system in Kaneohe, priced out

Only the first two rows differ. Everything financial — rate, tariff, price per watt — is inherited from Hawaii 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 Kaneohe array would produce, with rates rising at 2.5% a year, comes to roughly $136,597.

Electricity isn’t only for panels — the heat pump vs. furnace cost calculator compares heating costs at Kaneohe’s own 48.0¢/kWh rate.

Run it with your own bill