Tripac problems

Having problems with our Tripac apu. If we run the microwave it kicks in instantly. Sometimes the microwave will countdown normally, other times it will count down 10 seconds on the display in a 2 second period. It will not evenly cook food, and takes a lot longer than it should. Once the microwave has been used, the apu will kick on and off every twenty minutes until the truck is started once again. We do unplug the refrigerator while we use the microwave. Besides the microwave issue, the next problem is that if the Espar is turned on, the apu also kicks on about once an hour. Every time that it comes on, it kicks off the Espar, and you have to restart it. It does not take the time to cool down as it normally would when turning it off. On the plus side, if we are just sitting the apu doesn't kick in for over 24 hours, maintaining power to the refrigerator. We have had the batteries tested, and they show as being good, and we aren't sure what to look at next. Any advice would be greatly appreciated.

 

Thanks y'all. Definitely found the microwave to be an issue, and will be replacing it.

So, the next step will be when we are somewhere that isnt hot and humid, to test out things with the espar and new microwave.

 

Soory, I was viewing on my phone, and missed all of the previous posts.

The apu was on the truck, but was installed last October, we got in it in February.
It also has a xantrax (sp) inverter.
The batteries were tested separately, and tested good.

Again, thank you everyone for the help!!