We have, pump storage hydropower: https://old.reddit.com/r/askscience/comments/chm70g/askscience_ama_series_were_from_the_pacific/

Basically they store water up high to act as a battery. Some combine this with a solar lens and turbine (can be sourced from old tvs, it'sa Fresnel lens for a solar death ray) and boil the water with the sun/ray to get it to evaporate and then condensate in the elevated position.