I'm no expert, but I've been told these have been around for 3+ years now... and are really hard to get hold of !
(tho this might be changing now?)
from what I was told, the problem was the people making them didn't want to sell them without the backing of a utility company.... the idea being if they could team up with a utility company they could pump out millions of units very quickly
(tho this might be changing now?)
from what I was told, the problem was the people making them didn't want to sell them without the backing of a utility company.... the idea being if they could team up with a utility company they could pump out millions of units very quickly