The power center battery room
One of the gritty realities of solar power is that it drops to zero when the
sun sets or is hidden by clouds. The traditional means of storing solar
energy is in large battery banks. If you are close to the electric power
grid, a better solution is to sell your excess electricity back to the utility
Someday, there will a better alternative, such as hydrogen storage. Until then
we have to rely on banks of 900-pound lead-acid batteries. They are inefficient,
expensive and crude but, for now, indispensable.