Solar System Sizing Tool — San Francisco, CA
Use our interactive tool to determine the right solar system size for your home in San Francisco. Adjust your monthly electricity bill and home size to see a personalized recommendation based on local solar conditions.
Size Your Solar System
Local rate: 34.5¢/kWh
Peak sun hours: 5.1h/day
4.5
System Size (kW)
12
Panels Needed
216
Roof Space (sq ft)
$12,781
Est. Cost
8,348
Annual kWh
100%
Energy Offset
How We Calculate Your System Size
Your recommended solar system size is based on several factors specific to San Francisco, CA:
- Electricity usage: Your monthly bill is converted to annual kWh consumption using the local rate of 34.5¢/kWh.
- Solar irradiance: San Francisco receives an average of 5.1 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 San Francisco is 1,450 sq ft.
Solar at a Glance: San Francisco, CA
34.5¢
Avg Rate / kWh
5.1h
Peak Sun Hours / Day
4.5 kW
Avg Recommended Size
12
Avg Panels Needed
$12,781
Est. Cost (before incentives)
Pacific Gas & Electric (PG&E)
Utility Provider
Other Cities in California
Related Resources
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