Solar System Sizing Tool — Rapid City, SD
Use our interactive tool to determine the right solar system size for your home in Rapid City. 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: 4.8h/day
6.6
System Size (kW)
17
Panels Needed
306
Roof Space (sq ft)
$18,798
Est. Cost
11,556
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 Rapid City, SD:
- Electricity usage: Your monthly bill is converted to annual kWh consumption using the local rate of 13.5¢/kWh.
- Solar irradiance: Rapid City receives an average of 4.8 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 Rapid City is 1,700 sq ft.
Solar at a Glance: Rapid City, SD
13.5¢
Avg Rate / kWh
4.8h
Peak Sun Hours / Day
6.6 kW
Avg Recommended Size
17
Avg Panels Needed
$18,798
Est. Cost (before incentives)
Black Hills Energy
Utility Provider
Other Cities in South Dakota
Related Resources
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