Solar PV adoption has accelerated across Ontario following federal incentive programs and rising electricity rates. This guide covers system sizing, net metering rules, permit requirements, and 2026 installation cost ranges for GTA homeowners.
Ontario Net Metering
Ontario utilities are required under Ontario Regulation 541/05 to offer net metering. Excess solar generation credits your account at the retail rate, rolling forward monthly and settling annually.
Important: Net metering credits do not include delivery charges or global adjustment. Actual bill reduction is typically 40-60% of the full retail rate credited — delivery charges remain regardless of solar generation.
System Sizing for Ontario
Average Ontario home uses 9,000-11,000 kWh/year. A 10 kW system in the GTA generates approximately 10,000-11,000 kWh annually. For EV owners: size up 20-30%.
Permit Requirements
Building permit (roof-mounted structure) + ESA permit + utility interconnection agreement + provincial generator registration. GTA total timeline: 4-8 weeks.
Installation Costs (GTA 2026)
- 10 kW system (30 panels): $25,000-$40,000 fully installed before incentives
- Federal Investment Tax Credit: 30% of installed cost
- Canada Greener Homes Grant: $1,000-$5,000 (confirm current availability)
- Net cost after 30% ITC: $17,500-$28,000 for 10 kW
- Payback period: typically 12-18 years at current Ontario electricity rates
Full guide: https://telegra.ph/Ontario-Solar-Panel-Installation-Guide-2026---Costs-Net-Metering-and-Permits-04-26