May 28, 2020: Vistra announced on May 19 that it plans to expand the size of the battery energy storage systems at its power plant site in Moss Landing, California.
The company has entered a 10-year resource adequacy agreement with the utility Pacific Gas and Electric for a new 100MW/400MWh battery to complement the 300MW/1,200MWh battery already being built.
When the Moss Landing battery comes online, Vistra says it will be the largest battery of its kind in the world.
This is subject to approval by the California Public Utilities Commission (CPUC).This was filed on May 18 with a decision on its approval to be announced by September.
“Our Moss Landing site provides a unique opportunity for extensive battery development with its existing infrastructure and the physical space needed for even more potential growth,” says Curt Morgan, Vistra’s president and CEO.
“Utilizing our existing power plant sites allows us to cost-competitively develop renewable and battery storage assets as we rotate our power generation portfolio toward carbon-free technologies,”.
This announcement brings Vistra’s total to 436.25MW/1,745MWh of battery energy storage under contract in California:
Moss Landing – Phase I (300MW/1,200MWh)
Moss Landing – Phase II (100MW/400MWh)
In addition to its California projects, the company’s 10MW/42MWh Upton 2 Battery Storage Facility came online in December 2018. It is the largest solar-plus-storage system in Texas.
Pending the receipt of CPUC approval, Vistra says it anticipates construction on the second phase of the Moss Landing battery energy storage project will start this July and commercial operations will begin by August 2021.
Phase I remains on schedule to begin operations this December.