[alex-g]

I wonder if this even needs to be something in the home. Wouldn't it also make sense to install these things, in bulk, in a place where they could service several homes? Say, at the block level. If it is part of power distribution infrastructure as opposed to a consumer product, then that simplifies some of the safety and maintenance issues; concerns like weight or volume are even less important if they are housed in a dedicated structure.

[phreeza]

This is being done. Power companies have shipping containers full of batteries hooked up to their grids. I have read better stories but the first thing I found googling just now is this http://www.abc.net.au/news/2015-01-07/ausnet-trialling-new-s...

[sehugg]

That's still a pilot program, though. The Wikipedia article has a good summary of various tech and installed systems: http://en.wikipedia.org/wiki/Grid_energy_storage#Batteries

[spydum]

See fairbanks alaska: http://www.telegraph.co.uk/technology/3312118/Worlds-biggest...