Solar System Sizing Tool — Tacoma, WA
Use our interactive tool to determine the right solar system size for your home in Tacoma. Adjust your monthly electricity bill and home size to see a personalized recommendation based on local solar conditions.
Size Your Solar System
$
Local rate: 12¢/kWh
ft
Peak sun hours: 3.4h/day
9.7
System Size (kW)
25
Panels Needed
450
Roof Space (sq ft)
$27,558
Est. Cost
12,000
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 Tacoma, WA:
- Electricity usage: Your monthly bill is converted to annual kWh consumption using the local rate of 12¢/kWh.
- Solar irradiance: Tacoma receives an average of 3.4 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 Tacoma is 1,750 sq ft.
Solar at a Glance: Tacoma, WA
12¢
Avg Rate / kWh
3.4h
Peak Sun Hours / Day
9.7 kW
Avg Recommended Size
25
Avg Panels Needed
$27,558
Est. Cost (before incentives)
Tacoma Power
Utility Provider
Other Cities in Washington
Related Resources
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