Solar Storage Batteries

There is considerable research being undertaken into large scale liquid batteries that store excess solar and wind energy during dark or low wind periods.  MIT and a Fraunhofer consortium are among those investigating the issue.  This has been one of the challenges for effective green energy storage to create a stable supply.  Obviously under certain conditions solar and wind can not produce sufficient power, especially an issue if you are not connected to grid power for backup.

Liquid batteries are being touted as superior because they are cheaper to create, last longer, and their electrodes allow the liquid to absorb large quantities of energy quickly.

Small domestic installation use a bank of batteries, often in series, to provide backup, as this video shows.

The European aim is to build handball size storage facilities, to store sufficient power for up to 2000 households overnight.

For more information about giant batteries read here.