A real cost breakdown for a typical 6kW system in Hawaii, not just a national $/watt figure.
Hawaii has one of the higher electricity rates in the country at approximately $0.42/kWh, and excellent solar resource — among the sunniest states at 5.5 peak sun hours a day. Combined with a regional installed-cost estimate of $3.40/watt, a standard 6kW residential system runs approximately $17,690 before any incentives.
| Line item | Estimated cost | Share of total |
|---|---|---|
| Equipment (panels, inverter, racking) | $11,220 | 63% |
| Labor / installation | $6,120 | 35% |
| Permitting & inspection | $350 | 2% |
| Total (before incentives) | $17,690 | 100% |
A 6kW system in Hawaii costs close to the average across the 25 states we track ($17,372), and the electricity rate it offsets is 160% higher than the 0.16 USD/kWh average across those same states. That combination is what actually determines whether Hawaii is a faster- or slower-than-average place to go solar — a lower system cost alone doesn't help if the rate you're offsetting is also low, and vice versa. See how every state stacks up on the Electricity & Solar Rate Tracker.
At $4,047 in estimated annual value from 9,636 kWh of yearly production, this system pays back in roughly 4 years — a strong payback period compared to most states. Hawaii: Mostly closed to new net metering — newer systems use Grid-Supply or Self-Supply tariffs instead. On incentives specifically: Hawaii offers a substantial state renewable energy tax credit (capped) — with the nation's highest electricity rates, payback here is often very fast. The federal residential tax credit (Section 25D) expired for owned systems after December 31, 2025 — see our 2026 tax credit guide for what that means for your net price.
A typical 6kW residential solar system in Hawaii costs approximately $17,690 installed in 2026, based on a regional estimate of $2.95/watt — equipment usually makes up about 55% of that, labor about 30%, with the rest in permitting.
At Hawaii's average rate of $0.42/kWh, a 6kW system pays back in roughly 4 years — a strong payback period compared to most states. Your actual number depends on your usage and roof; check it precisely with the Solar Panel Cost Calculator.
A 6kW system in Hawaii costs close to the 25-state average of $17,372, while the electricity rate it offsets is 160% higher than the 0.16 USD/kWh average across those states.