Battery Energy Storage System (BESS)

Ontario is in a period of emerging electricity system needs, driven by increasing demand, the retirement of the Pickering nuclear plant, the refurbishment of other nuclear generating units, as well as expiring contracts for existing facilities.

To address these needs, the Long-Term Request for Proposals (LT1 RFP) is expected to competitively procure 2,518 MW of year-round effective capacity from dispatchable new build resources. These include new build storage facilities, registered or able to become registered in the IESO-administered markets, larger than 1 MW and which can deliver a continuous amount of electricity to a connection point on a distribution system or transmission system for at least four consecutive hours. 

  • BESS will be connected to your local electricity transmission system.
  • The BESS will be standby most of time. Only discharge per IESO requests when existing generation cannot meet electricity peak demands.
  • BESS components include containerized units housing all necessary batteries, inverters, fire suppression and extinguishment, and HVAC systems.
  • The BESS will be installed on a concrete pad.
  • The dimension of the container will be 2.9 meters in height, 6.0 m in length, and 2.4 m in width.
  • The BESS will be directly connected to the electricity grid, charging the batteries overnight when there is a low demand for electricity.
  • The BESS will then discharge its power to the grid during peak times, during the day, enhancing grid reliability.
  • This graph shows hourly electricity demand peak significantly during the day and decrease in the night, resulting in the need for battery storage.