Thanks for all the responses.
I think the discussion got settled on the tri-pak issue. Mine has an 1800 watt triplite inverter and the tripak is supposed to charge the batteries as needed. If by chance that does not work as planned (dead batteries) I can jump from the reefer unit if needed, then rethink the issue.
This is a company truck. The good news is that it is a small company and they are likely to be ok with removing the cabinet if asked first. I have already removed two bezels, to make room for the cooler and my radio, and stored them in the truck. I did not ask about those two and no one has said anything yet.
When I get back to the yard later today I will ask about removing the cabinet and where to store it. Gonna ask permission for removing the cabinet because it is a large item that cannot be stored easily on the truck.
Thanks for all the advice. The best answers are usually found here.
Thanks again,
Dan