Solar economics in Ontario differ significantly from other markets. Here is an honest 2026 assessment for Ontario homeowners.
Ontario Net Metering Reality
Ontario eliminated the premium feed-in tariff. Excess solar exported to grid earns wholesale/avoided cost rate — much lower than retail. Credits expire annually. Self-consumption is the key to solar economics in Ontario: use solar during peak production hours for appliances, EV charging, and daytime loads.
System Sizing
Average Ontario home: 9,000-12,000 kWh/year. A 6-8 kW system covers 60-80% of typical usage. Output depends on south-facing roof area, tilt, and shading. Ground-mounted systems allow optimal orientation.
Costs in Ontario 2026
6 kW system supply and install: $18,000-$28,000. Battery storage (Tesla Powerwall or equivalent): +$12,000-$18,000. Canada Greener Homes Grant: up to $5,000 for solar. Realistic payback: 10-18 years depending on hydro rates and self-consumption patterns.
Permits
ESA electrical permit, building permit for roof penetrations, utility interconnection agreement with local distribution company. Full process: 4-8 weeks.
Who Benefits Most
Homes with high daytime electricity consumption (EV charging, AC, home office). Properties with unshaded south-facing roof. Homeowners planning to stay 15+ years.
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