So I have a Cyberpower CP1500PFCLCD as my backup power source for my Enviro M55 Cast Iron Insert. Last winter I was fortunate in that we did not have any power failure...at least while using the stove. Also, we only run the stove when we are at home...we leave the house, we shut off the stove. When the house temp drops way down....the oil heat kicks in. But back to the UPS, say the power goes out and everything shuts off, EXCEPT the stove which would keep right on chugging because it is connected to the UPS and was not affected by the outsge. The UPS specs would indicate that it would only have enough backup power to run the stove in normal mode for maybe 2-3 minutes.......correct? HOWEVER...If the power went out, we would quickly go to the stove and basically hit the off button and allow the stove to go into the shutdown cycle and probably have enough power for about 10 minutes of venting! Does this seem about right? This is also why I installed an OAK...to make sure that I had no smoke filling the house in the event of a power failure. Bill