Trump emergency order casts uncertainty over grid battery growth

A new federal order is adding uncertainty to the large batteries that utilities use to store solar and wind power on the grid. On August 26, the Trump administration declared a national emergency over cybersecurity risks in the power grid and banned bringing in or installing foreign-made "bulk-power system" equipment, including batteries, inverters, transformers, and the software that controls them. The order can even apply to equipment already installed, giving federal agencies power to force utilities to disconnect or replace it.

The big question is how far this reaches. China supplies roughly 60% of the lithium-ion batteries used in U.S. grid storage projects, so if the ban covers battery cells themselves rather than just their control software, it could disrupt a large share of the market. The Department of Energy has until December 24 to issue rules clarifying what's actually banned, leaving developers in limbo. Some analysts say over 23 gigawatts of storage projects already under construction or financed could face delays or cancellations while the rules get sorted out.

This is a utility-scale grid story, not something that affects home battery purchases directly, but it matters for the pace of clean power coming onto the grid generally. It also piles onto existing tariffs and other rules already discouraging use of Chinese batteries and solar inverters in U.S. energy projects.