Multiple ways. One interesting one is huge sand batteries that are being heated up to massive temps, then having pipes run through there to collect the heat energy as hot water and doing the industrial processes that way.

Another way is using excess green energy to produce green hydrogen, which can be used as a fuel source in very high energy scenarios.

Past that, we recently have made electric arc furnaces and electric smelting furnaces for steel and aluminum, and several of these are fully solar powered.

It’s a shift to change the energy source for industrial production, but we have the technology and the ability. And the sun is free!