A real cost breakdown for a typical 6kW system in Honolulu, using local rate and sun-hour data rather than a state-wide average.
Honolulu has one of the higher electricity rates in the country at approximately $0.42/kWh, and excellent solar resource — among the sunniest metro areas at 5.6 peak sun hours a day — notably different from a simple Hawaii state-wide average in some cases, since metro-level microclimates and local utility rates can diverge from state figures. Combined with a metro-level installed-cost estimate of $3.40/watt, a standard 6kW residential system runs approximately $17,740 before any incentives.
| Line item | Estimated cost | Share of total |
|---|---|---|
| Equipment (panels, inverter, racking) | $11,220 | 63% |
| Labor / installation | $6,120 | 34% |
| Permitting & inspection | $400 | 2% |
| Total (before incentives) | $17,740 | 100% |
A 6kW system in Honolulu costs close to the 50-state average of $17,372, and the electricity rate it offsets is 160% higher than the $0.16/kWh average across those states. At $4,121 in estimated annual value from 9,811 kWh of yearly production, this system pays back in roughly 4 years — a strong payback period compared to most U.S. metros.
A typical 6kW residential solar system in Honolulu costs approximately $17,740 installed in 2026, based on a metro-level estimate of $2.96/watt.
At Honolulu's average rate of $0.42/kWh, a 6kW system pays back in roughly 4 years — a strong payback period compared to most U.S. metros.