Solar Cost Per Watt in Ontario
Residential solar in Ontario installs at roughly C$3.15 per watt — ranked 10 of 13 provinces and territories on price.
Cost / Watt
C$3.15
Cheapest Province
C$2.85
Most Expensive
C$4.20
System Prices in Ontario (CAD)
| System Size | Installed Cost | Per Watt |
|---|---|---|
| 4 kW | C$13,350 | C$3.34 |
| 5 kW | C$16,313 | C$3.26 |
| 6 kW | C$19,275 | C$3.21 |
| 7 kW | C$22,238 | C$3.18 |
| 8 kW(typical) | C$25,200 | C$3.15 |
| 10 kW | C$31,125 | C$3.11 |
Prices include a fixed installation overhead, so per-watt cost falls slightly as system size grows. Sources: Ontario Energy Board bill tracker (all-in residential rate); NREL PVWatts irradiance. As of 2026-07-01. Compare payback on the Ontario payback page.