Just to be clear, I'll say 2.5% is what already comes off the house. We're suggesting that you scale it up to 3.5%, 4%, or what have you.
More importantly, say you were to look at a net-zero electrical home and the cost of what it is today to install that, at roughly between $8 and $10 a watt, plus what it takes to get a home that is R-2000 standard. That's a minimum platform to make it a smart decision to install on-site generation, because you have to have an energy efficient house, a proper building envelope, before you do this. If you make those two choices, you're looking at about a $15,000 premium on the home.