Net Metering is a program whereby eligible customers with specific generation facilities can reduce their net energy costs by exporting surplus generated energy back onto the utility distribution system for credit against the energy the customer consumes from the distribution system.
https://www.hydroone.com/business-services/generators/net-metering
https://alectrautilities.com/connecting-generation
https://www.torontohydro.com/grid-connections/net-metering
https://www.oakvillehydro.com/my-home/general/Net-Metering-Program.html