OK, I am looking for a level 2 charger for my volt. I live in Canada, so we don't get any incentives to install the 240V units yet. What exactly does the unit do beside ensure that I don't get electricuted? I thought the car did all the work such as time of use, etc. I know that some of the units will allow for more power in the future if I need it, the volt won't use it. Why would I pay $1000 for a unit over $500 for the Voltec (which I think is also overpriced for a fancy wall plug!) I am going to have to buy in the next month before it gets too cold here. I need the 240V for preheating, but I can't see spending more when I hope the price will come down before I get another electric car that needs more than 3.3 kw/hr. Thoughts?