Nope. Let's be real.
My home batteries lose 10% through the process of storing the charge from solar, holding the charge for hours until night, then releasing the charge as my home needs power in the evening (or when it rains). How do I know this? Because my inverters reported that in all of 2023, 12,066.7kWh of excess solar was sent to my batteries, while only 10,880.5kWh was pulled from batteries when solar wasn't enough (i.e. at night). So right away, even with home solar and very mild power demands (relative to a steel shop), resorting to batteries means losing 10% off the bat.
Then there's the conversion loss when going from DC power to AC power. I can see with my EV going from AC to DC while charging it, I lose at least 10.8%. If I was to charge my EV at night (directly from battery instead of solar, which I sometimes do), then this 10.8% loss would be on top of the 10% loss of battery storage. So a 21% total loss. Assuming there's an equivalent 11% loss when going from DC power to AC (like running the steel mill from solar and/or batteries), we're now talking a 21% loss of energy to run the steel mill at night and on rainy days.
Then there's the wear and tear on batteries of high power demands.. For example, my EV's battery has a 10-year warranty, but my home solar batteries have 19-year warranties. Why? Because driving the EV means a high demand on the battery. Maybe not all day (unless I'm driving a long trip). But when I need power in my EV, I need lots of it. How much more does a steel mill demand on power? And if the solar system is able to charge those batteries for night use, then we're talking about really fast charging too. That'd be too much hard wear and tear on batteries.
It was a joke. Batteries only store about 6-7% of the energy that hydrocarbons can.