A snapshot of what solar actually costs and pays back in Hawaii right now, plus every calculator on this site pre-loaded with Hawaii's numbers.
At Hawaii's average residential electricity rate of $0.42/kWh and 5.5 peak sun hours per day, a standard 6kW residential system produces roughly 9,636 kWh a year. Installed at an estimated $3.40/watt, that system runs about $20,400 before incentives, with a simple payback around 5 years at full retail-rate value. Your real number depends heavily on your actual usage and roof — run it precisely in the Solar Panel Calculator, pre-loaded with Hawaii's defaults.
Hawaii: Mostly closed to new net metering — newer systems use Grid-Supply or Self-Supply tariffs instead. That's roughly a 55% export credit relative to the retail rate in our model — see the exact math for your own production and consumption in the Net Metering Calculator.
The federal residential tax credit (Section 25D) expired for owned systems installed after December 31, 2025 — see our 2026 federal tax credit guide for the full picture. At the state level: Hawaii offers a substantial state renewable energy tax credit (capped) — with the nation's highest electricity rates, payback here is often very fast. Check the Solar Tax Credit & Incentive Calculator for a worked example, and verify current program status with a database like DSIRE before budgeting around any specific number.
Get a full cost breakdown — equipment, labor, permitting — using Hawaii's regional cost estimate in the Solar Panel Cost Calculator, or see the full return-on-investment picture including degradation and rate escalation in the Solar ROI Calculator.
With an average residential rate of $0.42/kWh and mostly closed to new net metering — newer systems use grid-supply or self-supply tariffs instead, a typical 6kW system in Hawaii pays back in roughly 5 years based on current estimates — run your own numbers with your actual bill for a precise figure.
A typical 6kW residential system in Hawaii costs approximately $20,400 installed before any incentives, based on a regional estimate of $3.40/watt.