I wonder how these hook into the home electrical system? I am all for anything that adds additional capacity to the grid, is simple to install/maintain, and most importantly is cost effective. There are 77 million single family homes in the USA, and I would bet every single one of them has enough room for 2kw of solar on the roof. I am not a math wiz, but if we could milk 1kwh a day out of each of these systems, it would be 77 million kwh of power added to the grid every day, which is 28 billion kwh a year? Probably a drop in the bucket compared to actual usage, but I would think it would allow a reduction in capacity from fossil fuel plants. And hopefully a 2kw system could generate more than 1 kwh per day.