Hi. I am using a 375w phoenix inverter and plan on plugging in a 250w heater. It works fine but as the unit is under load the fans come on and stay on as long as the heater I have plugged in is running. Is it going to be bad for the fan if I run the heater overnight so the fan will be run constantly for several hours at a time. With how fast and loud the fan is I feel that running it so hard for so long over a period of time will just kill it. Any advice welcome.