Solar panels in Hawaii: cost & savings
Hawaii averages 5.9 peak sun hours/day and $0.42/kWh electricity. Here's what solar looks like for a typical home.
Typical Hawaii home estimate
| Average electricity rate | $0.42/kWh |
| Peak sun hours (daily avg) | 5.9 |
| Recommended system size | 6.3 kW (~16 panels) |
| System cost (before incentives) | $18,807 |
| Estimated system cost | $18,807 |
| Estimated payback period | 4 years |
| 25-year net savings | $135,832 |
Incentives: 35% state tax credit (up to $5,000); highest grid rates in the US. Note: the federal residential solar tax credit was eliminated for new installations after December 31, 2025. Check your state's programs for available incentives. Statewide net metering is limited — check your specific utility.
How Hawaii compares to the rest of the US
Two numbers drive solar economics: your electricity rate and how much sun your roof gets. Here's where Hawaii stands against the national average.
| Electricity rate | $0.42/kWh (151% higher than the $0.17 US avg) |
| Daily peak sun hours | 5.9 (32% more than the 4.5 US avg) |
| Net metering | Limited / utility-specific |
Hawaii is one of the stronger states for residential solar: both above-average electricity prices and above-average sunshine work in your favor. That combination is why the payback here (~4 years) tends to beat the national norm.
Calculate your own Hawaii savings
Adjust the numbers to match your actual electric bill:
Estimate your solar savings
Two quick inputs. We use your state's real electricity rate and sun hours.
Is solar worth it in Hawaii?
With Hawaii's electricity at $0.42/kWh and 5.9 daily sun hours, a typical solar system pays for itself in about 4 years and produces an estimated $135,832 in net savings over its 25-year life, based on 2026 pricing with no federal credit (eliminated Dec 31, 2025). The higher your bill and the more sun your roof gets, the faster the payback.
These figures are estimates. Get free quotes from local Hawaii installers to see real pricing for your roof.
Hawaii solar FAQ
How many solar panels do I need in Hawaii?
A typical Hawaii home needs roughly 16 standard 400-watt panels (about a 6.3 kW system) to offset its electricity use, given Hawaii's 5.9 daily peak sun hours. A higher bill or shadier roof pushes that number up.
Does Hawaii have net metering?
Hawaii doesn't have broad statewide retail-rate net metering, but many utilities run their own buyback or billing programs, so check your specific provider. 35% state tax credit (up to $5,000); highest grid rates in the US. Note: the federal residential solar tax credit was eliminated for new installations after December 31, 2025. Check your state's programs for available incentives.
What's the payback period for solar in Hawaii?
For a typical $378/month bill, the estimated payback is about 4 years, after which the power your panels produce is essentially free for the remaining ~21 years of the system's life.