VIDEOBack to Blog How FlexGen Managed RTC+B Share: Opens in a new window Opens in a new window Opens in a new window Copied to clipboard ERCOT's Real-Time Co-Optimization plus Batteries (RTC+B) transition changed how battery storage assets are dispatched, awarded ancillary services, and settled. It was a major shift for the market and for the storage operators participating in it. FlexGen supported 36 HybridOS battery sites totaling more than 800 MW through the December 5, 2025 cutover, helping customers move to the unified Energy Storage Resource model, implement Updated Desired Setpoint (UDSP) dispatch signals, and operate under the new co-optimized framework. As ERCOT guidance continued to evolve right up to go-live, our teams worked closely with customers and scheduling entities to keep systems aligned and ready. Because HybridOS is built to adapt, our customers were able to: Maintain market participation with minimal disruption Preserve access to high-value ancillary services Stay compliant while protecting revenue Market rules will continue to change. Having an EMS that can evolve with them makes a difference. To learn more, read our blog on the subject.
