As President Trump works to blunt the growth of wind and solar power and expand fossil fuel production in the United States, the renewable energy industry is making a new pitch: You need us.

Wind and solar developers are increasingly pointing out that America’s demand for electricity is soaring, driven by a boom in data centers, and it’s proving difficult to build enough new gas plants to supply all the extra power that the nation needs.

Wind, solar and battery storage are relatively quick and cheap to construct. That could help avert energy shortages and keep prices low, an argument that renewable energy firms are making to policymakers.

“Our message to the administration is, let’s be realistic about this,” John Ketchum, the chief executive of NextEra Energy, one of the country’s largest power producers, said in an interview. “If you take renewables and storage off the table, we’re going to force electricity prices to the moon.”

These are tough times, politically, for the renewable energy industry. Mr. Trump has been a blistering critic of wind turbines for years and openly promotes fossil fuels like oil and gas, riding into office on a promise to “drill, baby, drill.” He has halted federal approvals for wind farms, placed a moratorium on large solar arrays on public lands and frozen billions of dollars in spending for battery factories and electric grid upgrades.