A few years back, I rewired my gas furnace to be able to run the blower motor off a generator during outages. I've had no problems with that, and I discovered I can also run it off an Ecoflow Delta 2 (albeit only for about 2-3 hours of total run time).
More recently, I installed a few solar panels with a 280ah Lifepo4 battery and 2000 watt HQST inverter. That setup can recharge my Ecoflow with a rapid charge draw of around 1200 watts, so I know the system has enough power to run the furnace blower motor, which peaks around 900 watts and runs steady around 450 watts.
However, the problem is that when I connect the furnace to the inverter, it only runs for about three minutes, and then it stops pulling power from the inverter. On the inverter, the fans run for about a half a minute and then stop (not sure if that's relevant but noted in case). Then the power draw dwindles down from the inverter display, and the blower motor just stops running. I did add a ground wire from the inverter to a copper rod in ground. When I use an outlet tester on the inverter outlets, it shows "hot/neutral reversed." But I am so confused because the inverter can continually power literally anything else besides the furnace blower.
Any insights or suggestions would be much appreciated!! Thank you!