Clear answer, explained.
In Ontario, the Independent Electricity System Operator (IESO) runs demand response and capacity programs that compensate facilities for being available to reduce load when the grid is under stress. Traditionally, this meant shutting down equipment or curtailing operations — which most facilities cannot do without disrupting production. Battery storage solves this by discharging stored energy during these events, reducing grid consumption while maintaining normal operations.
Storage systems can generate value through three mechanisms in the IESO framework. Demand response events: dispatching during peak grid conditions to earn event-based payments when the IESO calls for load reduction. Capacity programs: receiving ongoing payments for committing to be available to respond when called upon — independent of whether events actually occur. Aggregator participation: most facilities enroll through a registered aggregator who manages dispatch and market participation on the facility's behalf, simplifying the compliance and administrative requirements.
Because these programs are recurring and contract-based, they provide a predictable ongoing revenue stream that is modelled alongside demand charge savings in the project financial model. IESO program rules, payment rates, and participation requirements change periodically — current program details are published on the IESO website and confirmed during project scoping.
What this means in practice.
- IESO demand response programs pay C&I facilities to reduce grid consumption during peak demand events
- Battery storage enables demand response participation without disrupting facility operations
- Demand response events: dispatching during peak grid conditions earns event-based payments
- Capacity programs: ongoing payments for committing to be available to respond when called upon
- Aggregator participation: a registered aggregator manages dispatch and market participation on the facility's behalf
- IESO program revenue is recurring and contract-based — modelled alongside demand savings in the project financial model
Best-fit environments.
- You have a battery storage system or are considering one and want to understand how IESO programs generate additional revenue
- You are evaluating the full financial return of battery storage and need to account for all revenue streams
- You want to understand how demand response works without requiring operational curtailment
- You are a large commercial consumer in Ontario and want to understand your options for participating in capacity markets
