Inverter quickly zapping 12 volt power

[DrSmart]

Originally Posted by Cavie

These #'s are not correct. Either they voltage or they are wrong #'s.

I can understand why you would question these numbers. The fridge should be drawing much higher wattage. The reason it seamed to look right was that the battery side of the inverter was supplying 13.2 volts and 10.9 amps. This should equate to 144 watts. With the inverter efficiency of about 89%, the AC side should be drawing about 128 watts. The display was showing 115. That started to drop down to about 100. The trailer battery was being maintained at 13.2 from the jumper cables to my truck. The inverter output voltage would be steady and not dropping.
When the weather cools down a bit, I'll head back out and repeat the test. I'll take photos of the inverter panel to confirm units indicated.