Utility Scale

Manage renewables, maximize penetration and value

Worker and transmission lines at sunset

Solar and wind at sunsetIntermittent renewable resources now dominate generation resources coming online. According to the U.S. Energy Information Administration, nearly 40 gigawatts of new generating capacity will start operation in 2021. Solar will account for 39% percent of it, followed by wind at 31%.

That means 70% of this year’s new generation that will be intermittent, and that’s why the time has come for long duration energy storage. Utilities will need grid-scale storage with energy durations long enough to manage and leverage increasing renewables. ESS is the way to implement that storage in a cost-effective, safe, sustainable way.

Energy Storage Use Cases

Peaker plant replacement

Ancillary services

Capacity reserve

Grid resiliency


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The ESS Energy Center is a grid-scale, long duration battery that delivers up to 12 hours of capacity. It is ideally suited to help utilities:

Shift PV and wind power: Store excess renewables production and shift energy to when it has greater economic value. Or avoid curtailments and get the greatest possible benefit from renewable assets.

Smooth renewable intermittency: Instantly react to changes in renewables’ generation output with fast, unlimited cycle capacity.

Augment or replace polluting peakers: The Energy Center has the duration and capacity to help you green up your resource mix by augmenting fossil-fuel-based peaking plants.

Support market participation: Use the Energy Center for frequency regulation and other ancillary services. As markets evolve, storage can serve as spinning reserves and even capacity. The Energy Center would meet PJM’s “10-hour rule” that requires duration-limited resources to provide stated capacity for as long as 10 continuous hours. Storage also could be used for black start.

Defer T&D upgrades: Alleviate congestion on power lines by holding power when the lines are at capacity and delivering it later. Or use storage in demand response initiatives to deliver energy and load as needed.

Stabilize microgrids and support virtual power plants: Long-duration storage solutions like the Energy Center boost reliability and flexibility of distributed energy resources.

Use Case Example

PV and wind shifting

With long-duration storage, you can store excess renewables production and shift energy to when it has greater economic value. Long-duration and multi-cycle energy storage can smooth and shift renewables towards becoming the new baseload energy solution.