California Battery Arrays Reach Capacity Equivalent to 12 Nuclear Plants

Record Battery Discharge

In late March, California's energy grid reached a significant milestone in energy storage capacity. For the first time, the state discharged just over 12,000 megawatts of energy from its battery arrays. This volume of power is equivalent to the output of 12 large nuclear power plants.

The discharge occurred during the evening hours as residential energy demand increased. According to reports, the grid utilized these battery arrays as families began evening routines, including using electric stoves and televisions.

Context of California's Nuclear Power

While the battery array's capacity is measured against the scale of nuclear plants, California's actual nuclear infrastructure is limited. The Diablo Canyon Power Plant serves as the state's last remaining nuclear facility.

Diablo Canyon currently accounts for approximately 9% of California’s in-state electricity generation. The plant had previously been slated for closure, with employees beginning decommissioning work. However, a 2022 policy reversal by Governor Gavin Newsom led to efforts to keep the facility operational.

Regulatory Status of Diablo Canyon

Federal regulators recently took action to ensure the continued operation of the state's sole nuclear plant. On a Thursday in April, regulators renewed the license for Diablo Canyon.

This federal approval ensures that the plant will remain open until at least 2030. Some reports indicate the extension granted by federal regulators could allow the plant to continue operations for up to 20 more years.