I ended up getting another Inverter identical to the one I already have to keep on board as a backup since the inverter is a critical component to run the "comfort" appliances such as the Fridge, TV, Microwave, etc. when boondocking. I ended up returning the 600W inverter I bought for a fridge backup because it would occasionally trip when the fridge compressor came on. Apparently the fridge has a a very high surge and that inverter could not handle it consistently and tripped. I do not think it was working at its rated specifications in any case ... I know those fridges can have up to a 10X instantaneous surge for a second.. but that is crazy that a 600W inverter with 1000W surge could not handle it.
In any case, I bid on and got the same exact 1500W (3000W surge) Pure Sinewave inverter for only $40.00 more which I know works to run my Fridge and AC together. Because I can't help myself, I took the cover off to inspect the workmanship and quality since this is a Chinese made inverter (what isn't Chinese made these days). The Chinese have come a long way on some stuff. This inverter is running quality Japanese electrolytic capacitors rated for 250VAC and all the FETs are name brand and overrated for the circuits as far as I can tell. Another thing I noted was how large the current carrying circuit board traces are and the overall thickness of the Printed Circuit board in addition to the very heavy heatsinks with thermosat controlled fans. That, with what appears to be heavy Gage copper transformers, is impressive for the $$. The one I have has been working great so far. Hopefully I don't need the backup...
What I haven't done is tried these with my HF Radio and etc. operating nearby. I'd like to see if the inverter is throwing off much EMI (known for harmonics on the switching frequency). That check is for another day, but nothing a few snap on ferrite beads strategically placed couldn't handle, I hope, if that is the case?