System Size Estimator
Get a ballpark system size, panel count and roof area from your monthly electricity usage.
Estimate to offset ~100% of your usage at Minnesota production, using ~430 W panels — not a design. Actual size depends on roof orientation, shading and your goals. Your kWh is on your electric bill.
Get a real design →How we right-size a Minnesota system
We start from your real 12-month usage and size to offset about 100% of it at Minnesota production (~1,200 kWh per kW per year), then lay the panels out across your best roof planes. Per-panel microinverters let us use east- and west-facing sections and work around shading, so the panel count above is a starting point — the real design comes from your roof.
Frequently asked.
How many panels will I need?
Roughly your system size in watts divided by the panel wattage (~430 W each). A typical Minnesota home lands around 15–25 panels, but it depends on your usage and roof.
How much roof space does that take?
About 21 sq ft per panel, so a 7 kW system needs roughly 350 sq ft of usable, well-oriented roof. South, east and west faces all work; we model each plane in a real design.
Is bigger always better?
No — we size to offset your usage without overbuilding, since Minnesota net metering credits surplus but you don't want to pay for more than you'll use.
Want the real numbers?
These tools are ballparks — a free assessment gives you exact, site-specific figures.