There are many other solutions than traditional pumped hydro when it comes to electrical storage : new pump hydro on isolated reservoirs (eg gordon butte), batt

There are many other solutions than traditional pumped hydro when it comes to electrical storage : new pump hydro on isolated reservoirs (eg gordon butte), battries (eg flow batteries), compressed air, liquid air, stacked bloks, heat to energy come in mind And you can store energy as heat or cold, which is easier and cheaper, with a bigger potential And you can have an impact on the demand side, with energy efficiency and demand-response