Solar System Sizing Tool — Honolulu, HI
Use our interactive tool to determine the right solar system size for your home in Honolulu. Adjust your monthly electricity bill and home size to see a personalized recommendation based on local solar conditions.
Size Your Solar System
$
Local rate: 43.5¢/kWh
ft
Peak sun hours: 5.5h/day
4.2
System Size (kW)
11
Panels Needed
198
Roof Space (sq ft)
$11,945
Est. Cost
8,414
Annual kWh
100%
Energy Offset
Energy Offset100% of your usage covered by solar
0%50%100%
How We Calculate Your System Size
Your recommended solar system size is based on several factors specific to Honolulu, HI:
- Electricity usage: Your monthly bill is converted to annual kWh consumption using the local rate of 43.5¢/kWh.
- Solar irradiance: Honolulu receives an average of 5.5 peak sun hours per day, which determines how much energy each panel produces.
- Panel specifications: We use 400W panels, each requiring approximately 18 sq ft of roof space, which is standard for modern residential installations.
- Roof space: The total roof area needed depends on the number of panels. The average home in Honolulu is 1,400 sq ft.
Solar at a Glance: Honolulu, HI
43.5¢
Avg Rate / kWh
5.5h
Peak Sun Hours / Day
4.2 kW
Avg Recommended Size
11
Avg Panels Needed
$11,945
Est. Cost (before incentives)
Hawaiian Electric (HECO)
Utility Provider
Other Cities in Hawaii
Related Resources
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