Solar payback in Hawaii (2026)
In Hawaii, a typical 8 kW home-solar system costing about $24,000 ($3/W, no federal credit in 2026) has an estimated simple payback of 4.1 years and roughly $169,493 in net savings over 25 years. This assumes an average rate of 42.23¢/kWh and ~1,680 kWh produced per kW each year.
Source: EIA & NREL. Data as of March–June 2026.
By far the highest electricity rates in the US plus excellent sun give Hawaii the fastest cash payback of any state. A 35% state tax credit (capped) and high self-consumption value make adding a battery especially worthwhile.
Hawaii solar payback at a glance
| Metric | Value (HI) |
|---|---|
| Average residential rate | 42.23 ¢/kWh |
| Peak sun hours (daily avg) | 5.8 h |
| Production factor | 1,680 kWh/kW/yr |
| 8 kW system annual output | 13,440 kWh |
| Est. up-front cost (8 kW @ $3/W) | $24,000 |
| Year-1 bill savings | $5,676 |
| Estimated simple payback | 4.1 years |
| Estimated 25-year net savings | $169,493 |
Source: EIA Electric Power Monthly (Mar 2026) & NREL PVWatts. Data as of June 2026.
Run your own numbers for Hawaii
The calculator below is pre-filled with Hawaii's electricity rate and production factor. Change the system size, cost per watt or escalation to match your own quote.
Figures are planning estimates that ignore financing, inverter replacement and maintenance. They assume cash purchase, 3%/yr rate escalation and 0.5%/yr panel degradation. See the methodology and disclaimer.
How Hawaii compares
Browse all states to compare payback, or read the guides: Is solar worth it in 2026 without the federal credit? and solar payback period explained.
Frequently asked questions
What is the solar payback period in Hawaii?
For a typical 8 kW system costing about $24,000 ($3/W) with no federal tax credit in 2026, the estimated simple payback in Hawaii is roughly 4.1 years, based on an average residential rate of 42.23¢/kWh and a production factor of about 1,680 kWh per kW per year. Your actual payback depends on your quote, usage and net-metering rules.
Is solar worth it in Hawaii now that the federal tax credit has expired?
The 30% federal residential credit (Section 25D) expired on December 31, 2025, which raises the up-front cost of 2026 installs by about 30%. By far the highest electricity rates in the US plus excellent sun give Hawaii the fastest cash payback of any state. A 35% state tax credit (capped) and high self-consumption value make adding a battery especially worthwhile.
How much electricity does an 8 kW system produce in Hawaii?
About 13,440 kWh in year one (8 kW × 1,680 kWh/kW), declining slowly as panels degrade ~0.5% per year.
Other states
Last updated: 2026-06-14