HARMONY STORAGE 2
307.878 MW storage in Contra Costa, CA · In queue since April 2021 · Proposed COD June 2031
307.878 MW
Capacity
1
Components
Battery
4y 11m
In Queue
System Impact Study
IA Status
COD target: 2031
Total Duration
10y 2m
Interconnection request submitted to ISO/RTO
CAISO uses cluster studies where projects are batched annually and studied together.
Typical: 36–48 months (IR to IA)
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2031-06-05
State
CA
County
Contra Costa
Region
CAISO
Developer
—
Utility
PGAE
Entity
CAISO
Point of Interconnection
Contra Costa PP 230 kV
Data Source
LBNL + Live
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Last updated 2026-03-26