Ontario IESO

The Independent Electricity System Operator (IESO) balances the supply of and demand for electricity in Ontario and then directs its flow across the province's transmission lines.

The IESO works at the heart of Ontario's power system, connecting all participants − generators that produce electricity, transmitters that send it across the province, retailers that buy and sell it, industries and businesses that use it in large quantities, and local distribution companies that deliver it to people's homes.