One is that they deal badly with usage intermittency - one must be always charging or discharging them, you can't just store them.
The second is just, where do I buy one? Nobody seems to make them, no idea why. Maybe this one solves itself when solar gets widespread, or maybe there's some government hand in that and it won't be available when we need it.
One is that they deal badly with usage intermittency - one must be always charging or discharging them, you can't just store them.
That isn't really a problem in home use. You just run your power though them, and dump any excess to the grid.
The second is just, where do I buy one? Nobody seems to make them, no idea why. Maybe this one solves itself when solar gets widespread, or maybe there's some government hand in that and it won't be available when we need it.
For industrial use http://redflow.com/, and just starting to hit the residential market now
(Disclaimer: I work in the same building as a Redflow office)
One is that they deal badly with usage intermittency - one must be always charging or discharging them, you can't just store them.
The second is just, where do I buy one? Nobody seems to make them, no idea why. Maybe this one solves itself when solar gets widespread, or maybe there's some government hand in that and it won't be available when we need it.