Siemens Energy, the German company, plans to invest $1 billion to make more electrical equipment in the United States, a welcome development for utilities and data center developers.

The manufacturing expansion announced Tuesday amounts to a bet that the artificial intelligence boom, which is propelling plans for new energy-hungry data centers, will drive U.S. electricity demand higher well into the future.

“The models” — the A.I. computer programs — “need to be trained,” Christian Bruch, the chief executive of Siemens Energy, said in an interview in New York. “The electricity need is going to be there.”

Siemens Energy’s spending will be distributed across several states, including Florida and North Carolina. Much of it will go toward expanding existing plants, though Siemens Energy also plans to build a factory in Mississippi to make electrical switchgear, equipment that manages power flows. In all, the expansion is expected to create around 1,500 jobs.

From the power transformers used to increase or decrease voltage, to the giant turbines that help turn natural gas into electricity, many of the components needed to generate electricity and move it have been in such high demand that prices have soared and waits have stretched to many years.

That has been good for companies like Siemens Energy, whose shares are up more than 160 percent in the past year, surpassing the gains of many businesses more commonly associated with the A.I. boom, such as Nvidia, the chip maker.