DO NOT BUY AO SMITH!!
I have 2 of these. They're both AO Smith 50 gallon hybrid water heaters. The idea behind them is great, they really don't use much power, like 500 watts ish when running off the heat pump. My problem is AO Smith.
One of my heaters at about 1 year old the heat pump stopped working randomly and would only heat with the electric coils like a normal water heater. I called AO Smith and they sent a tech out. The tech said the problem was my tank was in too small of a space and that's why it wasn't working then proceeded to tell me since there's nothing "wrong" with my heater that I get charged the $170 for the service call and AO Smith won't pay. So, needless to say AO Smith can go to F!@king hell. NEVER BUY AO SMITH. They will tell you you have to have a minimum of 10ft clearance on all sides of the water heater or your warranty is void. To top all this off, about 3 weeks after we got stiffed with the service call bill, the heat pump randomly started working again and has been working fine for the last 3 weeks ish since then. I guess it decided it had room to breath? lol BS!!! I'll say again, NEVER BUY AO SMITH!!
NEVER EVER EVER UNDER ANY CIRCUMSTANCES BUT AO SMITH.