Summary | "The issue with existing batteries is that they
suck.Both can be connected with solar or grid and both can
provide backup power, Musk said.They will go on sale later this
year in the United States, to be followed by foreign sales.But
It remains to be seen whether Powerwall and other Tesla
products will find a market.Tesla Energy is a critical step in ...
en.ce.cn | 01 May 2015