Controlling for state of charge, temperature and less deep cycles, it is likely that we can achieve your figures given current tech. The question is the price.

Controlling for state of charge, temperature and less deep cycles, it is likely that we can achieve your figures given current tech. The question is the price. If you are not fully using them, then you need more batteries. At which point it becomes economical requires some guesses and heavy number crunching. I agree with you on hydro, gravitational storage is relatively simple to do. But it takes space. Batteries could make more sense for microgrids.