I'm having the same issue. I have found that the lack of information on electric tankless only proves that they save you nothing. I can't find any energy guide on ELECTRIC tankless units. Also the only energy calculator I found actually showed my electric bill would be higher by $28 a year. Huh. Right now my bill is $22 a month with my 50 gallon tank electric water heater. Would a tankless be less? I don't think so. Seeing how the manufacturer gives you no information I did the math and it appears my bill would actually more than double! What a savings. The people who love them are using the gas tankless. And I know this because in Michigan I have a separate meter just for my tank water heater. It gives me lower kWh rates. Any thoughts.