Also, phase change hot water 'batteries' - https://sunamp.com/blog/new-video-on-how-phase-change-materials-heat-hot-water-in-homes/ https://sunamp.com/blog/new-

Also, phase change hot water 'batteries' - https://sunamp.com/blog/new-video-on-how-phase-change-materials-heat-hot-water-in-homes/ https://sunamp.com/blog/new-video-on-how-phase-change-materi...