Undecided did a couple of videos on this technology. It seems quite useful for heat storage - as other commenters have noted, it isn't that efficient for pure e

Undecided did a couple of videos on this technology. It seems quite useful for heat storage - as other commenters have noted, it isn't that efficient for pure electric <-> electric storage. * How a Sand Battery Could Change the Energy Game - https://www.youtube.com/watch?v=G6ZrM-IZlTE https://www.youtube.com/watch?v=G6ZrM-IZlTE * Sand Batteries for Home Usage - https://www.youtube.com/watch?v=KVqHYNE2QwE https://www.youtube.com/watch?v=KVqHYNE2QwE