Solar savings & payback in Hawaii
Hawaii runs about 42¢/kWh with net billing (reduced export rate). Enter your bill for a payback estimate tuned to local rates and sun, no federal tax credit assumed (it expired at the end of 2025).
- Avg electricity rate
- 42¢/kWh
- Solar generation
- ~4.8 kWh/kW/day
- Net metering
- Net billing (reduced export rate)
- Export credit
- ~50% of retail
State incentive: 35% state tax credit (capped) plus the nation's highest electricity rates.
Where your money goes
Your 25-year money curve
What the planet gets
Net metering credits exported power against what you draw from the grid. Rates vary by state, California's NEM 3.0 pays much less for exports than 1:1 states.
Enter a valid monthly bill and tariff greater than zero to see your results.
How Hawaii compares to the US average
Three numbers decide most of your payback. Here's where Hawaii sits against the national picture.
Electricity rate
42¢/kWh
US average: 17¢/kWh
Higher rates make every solar kWh worth more
Solar generation
~4.8 kWh/kW/day
US average: ~4.5 kWh/kW/day
More sun per panel than the US average
Typical payback
5.4 years
US average: 10.6 years
Faster than the US average on a $150 bill
Solar cost & savings by system size in Hawaii
Computed with Hawaii's rate (42¢/kWh), sun (~4.8 kWh/kW/day), and its reduced export credit, at the 2026 national benchmark of ~$2.75/W with no federal credit.
| System size | Installed cost | Generation/mo | Annual savings | Payback |
|---|---|---|---|---|
| 4kW | ~$11,000 | ~576 kWh | ~$2,032 | ~5.4 yrs |
| 6kW | ~$16,500 | ~864 kWh | ~$3,048 | ~5.4 yrs |
| 8kW | ~$22,000 | ~1,152 kWh | ~$4,064 | ~5.4 yrs |
| 10kW | ~$27,500 | ~1,440 kWh | ~$5,080 | ~5.4 yrs |
Savings assume a home large enough to use this output. Figures last reviewed July 2026,size a system from your actual bill instead.
How exports are paid in Hawaii
No traditional net metering; 'Customer Self-Supply' and battery-export programs replaced it. With the highest rates in the US, self-consumption is extremely valuable.
Because Hawaii pays less than the full retail rate for exported power, the numbers reward using more of your own solar, running big loads in daylight, or adding a battery to store the surplus instead of exporting it cheaply.
Policies change often, always confirm current rules with your utility or at DSIREbefore deciding.
Hawaii solar FAQs
Is solar worth it in Hawaii in 2026?
For a typical $150/month bill, we estimate a Hawaii system pays for itself in about 5.4 years, with no federal tax credit assumed (the residential credit expired at the end of 2025). At 42¢/kWh with net billing (reduced export rate), the economics are solid for most suitable roofs.
How much does a solar system cost in Hawaii?
At 2026 benchmark prices (~$2.75/W), a 6kW system runs about $16,500 installed, generating roughly 864 kWh a month in Hawaii's sun. Local quotes vary 20-40% between installers, so always collect several.
What is the net metering policy in Hawaii?
No traditional net metering; 'Customer Self-Supply' and battery-export programs replaced it. With the highest rates in the US, self-consumption is extremely valuable.
Does Hawaii have a state solar incentive?
35% state tax credit (capped) plus the nation's highest electricity rates. Since the federal residential credit ended in 2025, state and utility incentives are the main upfront help available.
How many solar panels do I need in Hawaii?
A 2.5 kW system suits a typical $150/month bill in Hawaii, that's roughly 6 modern 425W panels needing about 163 sq ft of unshaded roof. Enter your own bill in the calculator above for a precise size.