To make solar power viable, we need a solution for overnight energy storage.
Batteries are complicated.
Do you know what isn't? Water go up. 
To make solar power viable, we need a solution for overnight energy storage.
Batteries are complicated.
Do you know what isn't? Water go up.
Increasingly becoming widespread at larger scales. China spent $2 billion on a 3.6 GW installation with 40 GWh of storage a couple years ago for example