April 29 (Reuters) - Manufacturers and developers of

U.S. energy storage projects said their industry will invest

$100 billion this decade to create a wholly domestic battery

supply chain, but warned the goal was contingent on support from

Washington.

The American Clean Power Association, a trade group that

represents energy storage companies, said its members aimed to

decrease the sector's reliance on China, which today supplies

the majority of U.S. batteries.

Storage projects, therefore, are poised to be hard-hit by

President Donald Trump's decision to impose tariffs of 145% on

Chinese imports. The industry is pressing for a more nuanced

approach to incentivizing domestic production.

"China stole our supply chain over a decade, we're not going

to get it back in 10 weeks," ACP CEO Jason Grumet said on a call

with reporters ahead of the announcement. "If the administration

starts to view batteries as a critical national security

technology, we will shift away from the kind of broadbased

reciprocal tariffs, which are a very kind of blunt shock-and-awe

attention-getter, into that kind of strategic conversation."

Grid storage projects, primarily large lithium-ion

batteries, can help resources like wind and solar energy by

storing power when the sun is shining and the wind is blowing so

that it can be used later.

U.S. utility-scale battery capacity rose 66% last year and

was second only to solar in capacity additions to the nation's

grids, according to the U.S. Energy Information Administration.

But the clean-energy sector has been on high alert since

Trump took office in January, pledging to boost fossil fuels and

undo the climate and renewable energy policies of his

predecessor, former President Joe Biden.

The $100 billion in investment will create 350,000 jobs and

would include $10 to $15 billion in active projects, ACP said.

Those include a Tesla battery cell facility in Sparks,

Nevada, a Fluence cell factory in Tennessee, LG's

plant in Holland, Michigan, and a Weirton, West

Virginia, facility by startup Form Energy.