The short answer is, probably not. The typical grid-tied system is designed to turn off if the grid goes down for safety reasons. That being said there are ways to have power when the grid goes down but honestly a generator would be a cheaper solution.

Top 5 Solar Energy Incentives for Ontario Homes in 2025
With federal, provincial, and municipal solar programs continuing to evolve, solar energy incentives continue to evolve. These incentives help you