Yes, that's how I see it, but I remember that bitcoin is a battery was a popular metaphor among some of the more woo-woo bitcoiners some years ago.

My understanding of schnitzel's thing here is that you might expect residential solar and home Bitcoin mining to be a great fit: when the sun is shining and you aren't using much power, your miners could grab the extra watts. But I think the problem has been that in the residential solar case, miners would need to vary how much they were drawing based on how much energy people in the house were using. And it seems this was nontrivial.

He has some custom mining firmware that solves this problem and it seems pretty cool.