Batteries (plus all the other associated equipment and maintenance) are hardly cheap in the quantities needed to keep heavy industry running 24×7. Battery storage holds promise for the future but so far it's only been used on relatively small demonstration projects. And some of those have been plagued by fires and outages.
I don't have any objection, I'm just stating a reality: it's going to take decades to build out enough battery storage to make renewable energy practical for the base load required for heavy industry. This stuff doesn't scale up quickly regardless of costs or incentives. The places where battery storage is used today generally have high electricity prices and low industrial capacity. If we want to have cheap stuff then we need to have cheap electricity (and cheap industrial heat) available to make that stuff 24×7.
