Enter your location and home profile below to estimate solar output, system cost, and payback time. Solar resource data is pulled live from PVGIS v5.2 (EU Joint Research Centre satellite data).
1Location
📍 Oahu, Hawaii 21.3100°N · 157.8600°W Solar resource via PVGIS v5.2 · EU JRC
⏳ Fetching solar data for Oahu, Hawaii…
What will it cost me?
Install Cost
When does it pay for itself?
Payback Time
set tariff in Cost & Incentives
2How Much Solar Do I Need?
Bedrooms
Cooling
Water Heater
Electric Vehicle
Pool or Hot Tub
Estimated usage
~690kWh / month
~8,280 kWh/yr
I want solar to cover…80%of my bill
10% — small offset50% — half100% — net zero
Panel type
Higher-rated panels produce more per panel — so you need fewer of them.
Waiting for solar data…
Estimates based on Hawaii EIA residential data
Cost & Incentives
Install Cost$3.50 / Wp
Electricity Tariff$0.40 / kWh
Gross Install Cost
$10,500
3.0 kWp × $3.50/Wp
Federal ITC (30%)
− $3,150
All US states · Inflation Reduction Act
Hawaii State Credit
− $3,675
HRS §235-12.5 · capped at $5,000
Net Out-of-Pocket
$3,675
You save 65% vs gross cost
35%
30%
35%
You pay · $3,675
Federal ITC · $3,150
HI State · $3,675
Financing Calculator
Interest Rate6.5% APR
3%12%
Term
$32/month for 15 years
Total paid: $5,762Interest: $2,087
Hawaii HRS §235-12.5 · Federal ITC per IRS Form 5695 · Consult a tax professional before filing
Monthly chart will appear after solar data loads.
Energy Yield — Global Context (kWh/kWp/yr)
Paris reference: 1,007 kWh/kWp · Oahu, Hawaii: +59%
🇳🇴Oslo, Norway820
🇬🇧London, UK950
🇫🇷Paris, FranceREF1,007
🇯🇵Tokyo, Japan1,100
🇪🇸Madrid, Spain1,500
📍Oahu, HawaiiLIVE1,600
🇺🇸Phoenix, AZ1,860
🇦🇪Dubai, UAE1,950
Reference yields from PVGIS / IRENA Solar Atlas · Live value updates with slider inputs and location changes
Solar resource via PVGIS v5.2 (EU JRC) · Geocoding via OpenStreetMap Nominatim · Consumption estimates: Hawaii EIA data · Incentives: IRS Form 5695 + HRS §235-12.5 · For educational use only