Solar System Size Calculator — Canada

Your power bill and province determine the system that offsets your usage.

Province

Monthly bill (C$)

System Size

— kW

Panels (425 W)

—

Roof Area

— m²

Sizing assumes an 86% system-efficiency factor on provincial peak-sun-hour averages. Get a payback estimate on the CAD ROI calculator.

Written & reviewed by

EnergyTools Research Team — Solar Energy Research Group

The EnergyTools Research Team compiles and verifies residential solar data from NREL, EPA, and state utility commissions. Methodology is reviewed quarterly.

Source data: NREL PVWatts V8 + Utility Rates V3 APIs
Source data: EPA FuelEconomy.gov vehicle efficiency data
Methodology reviewed quarterly

Methodology & data sources:NREL PVWatts, provincial utility commissions· Updated 2026.