Your Inverter is working as designed and as installed by Thor.
So this has been discussed dozens of time..... especially recently with all the newbies joining the RV world.
The stock battery setup on most these coaches could not support running an A/C unit or even just running a microwave very long without draining the batteries completely.
Also depending on the rating of your microwave and other appliances, 2000W may not be enough to handle the surge at startup of some microwaves.
Thor only wires specific outlets to the Inverter. Here is the typial setup but you need to register on the Thor Owners Resource Site (
https://www.thormotorcoach.com/owners/) and download the schematics for your model. It will show which outlets are powered by the Inverter and which ones aren't.
Thor typically wires the folllowing into the Inverter Circuit:
- Residential Fridge (not an absorption fridge)
- Outdoor Fridge (if applicable)
- Outdoor TV
- Indoor TV (if there are two indoor TV's it could be only one or both)
- Outlet in Bedroom for CPAP Machine
- Entertainment System (DVD Player, if applicable)
Circuits not part of the Inverter:
- GFCI Outlets
- A/C Units
- Microwave
- Induction Cooktop
- Absorption Fridge
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