Your future air conditioner might act like a battery, storing cooling power for when it’s needed most

https://www.technologyreview.com/2024/08/06/1095707/air-conditioner-battery/

"charging themselves when renewable electricity available/ demand low, still cooling when grid stressed...  Nostromo Energy’s IceBrick: cools water and glycol solution freezing 1,000s of capsules each holding half-gallon water... insulation keeps capsules frozen until used, dropping temperature of water-glycol mixture, cooling water in building’s existing chilling system... discharges cooling power between late afternoon and evening..., helps grid when systems linked together... freezing stores more energy with much less material"