Based on our previous sizing exercise, we determined the average Oahu household could install a 4 kW solar system for about $11,500 after incentives. Compared to paying $220 per month to HECO, that system would cut your bill by $110 monthly, or $1,320 per year.
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Yes, you can install solar panels on a north-facing roof, but efficiency will be lower compared to south-facing panels. However, with tilted mounting systems, high-efficiency panels, and microinverters, homeowners can still generate 50-85% of the energy they would on an ideal.
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Use this free interactive solar panel calculator to find out how many solar panels fit on your roof.
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On this map, you'll find manufacturers spanning from polysilicon to module as well as the aggregate production capacities for each segment.
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