Big generators all use TSLA battery units for their storage, all the ones I have looked at anyway, including NG and a company in California who were forced by a judge to include battery storage on the network after a gas pipe blowout caused power cuts. They seem to be the only one that can quickly provide MwH of storage capacity.
To get down to the $125 KwH cost TSLA have built what they call mega-factories, and they really are stupendously huge. They’re teamed up with Panasonic on this , by the way, which I have often thought of buying into because of the lead they have in Lithium-Ion batteries along with TSLA. (Can’t buy ADRs on ii anymore though, and Japanese market isn’t open to ii customers either).
They have gone for economies of scale, on top of every innovation known to get the cost down to that level, I doubt very much anyone will beat them in that technology. It is one of the dozens of new technologies that will make the breakthrough - although no one seems to be crowing just yet - or TSLA will do it through some new innovation to existing technology, although scientists think there is pretty much no more efficiencies to be had out of Lithium-Ion at this point - hence TSLA going for economies of scale on a scale that almost no other company can hope to match.
Did you buy TSLA solar panels? I believe they’re the biggest provider in USA. They’re not just E.V. cars, although they are well ahead in that field too, with their own infrastructure rather than waiting for governments to place it in for them.
That’s what I like about Elon Musk. That sort of get-on-with-it action … and he sends rockets to the moon also. If there is another Steve Jobs in USA right now, it is Musk IMO, and I backed TSLA originally based on that alone. Not a very sound investment strategy, granted, but sometimes you go with your gut on these things. It worked with FB, after having hated them as an organisation for many years before I saw their strength of management and bought in purely on that.