I don't know if you can store that much heat (hundreds of °C), for that long, and with no price fluctuation due to variability of an external heating supply. O

I don't know if you can store that much heat (hundreds of °C), for that long, and with no price fluctuation due to variability of an external heating supply. One of these SMR hooked to your factory can provide it, at probably higher temps, enabling more processes, 24/7, and at a less variable cost, not having to rely on external supply.