Solar System Sizing Tool — San Antonio, TX
Use our interactive tool to determine the right solar system size for your home in San Antonio. Adjust your monthly electricity bill and home size to see a personalized recommendation based on local solar conditions.
Size Your Solar System
$
Local rate: 13.5¢/kWh
ft
Peak sun hours: 5.3h/day
7.6
System Size (kW)
19
Panels Needed
342
Roof Space (sq ft)
$21,608
Est. Cost
14,667
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 San Antonio, TX:
- Electricity usage: Your monthly bill is converted to annual kWh consumption using the local rate of 13.5¢/kWh.
- Solar irradiance: San Antonio receives an average of 5.3 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 Antonio is 2,000 sq ft.
Solar at a Glance: San Antonio, TX
13.5¢
Avg Rate / kWh
5.3h
Peak Sun Hours / Day
7.6 kW
Avg Recommended Size
19
Avg Panels Needed
$21,608
Est. Cost (before incentives)
CPS Energy
Utility Provider
Other Cities in Texas
Related Resources
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