I agree the price is high, but it might come down.
Also it's the ultimate back up power for your reef!
I wonder how much power it can store. I could see it, if there was a black out I would be running around the house unplugging everything but the tank.
That would be sweet. But $10,000 for the home based version? That would take forever to recoup costs. Obviously they are geared exclusively towards commercial users. Sweet concept though.
SHiet!!! Youd be better off getting a photvoltaic array on your roof and watch your meter go backwards. Plenty of tax breaks and benefits as well as subsidies from the goverment. And all that does not even cost 20% of what thie gridthingy costs. Its crap if you ask me. There are better ways to save....