[sagher]

As per my knowledge the only way is to use alternate like solar panel sources and store it in dry batteries.

The EESI (environmental and Energy Study Institute) also release an article in 2019 on it. i share link here for detail study .

EESI

Now many of 3rd world countries now also step forward to reserve energy by using multiple sources like solar grid stations and from air. but i still not hear about storage of AC (alternate current) electricity storage plan. DC (direct Current) electricity storage is possible with different kind of batteries.