From RV Business:
MIDDLEBURY, Ind. – Jayco has announced in a press release the launch of its new Overlander EXT Modular Power Management package, which sets the standard for factory installed systems. The original Overlander II package was launched by Jayco as an option for model year 2021 and the new Overlander EXT package is a considerable step up in power, components and flexibility, the release states.
This new system apparently uses the 12 volt a/c units used on vans and mini buses.
https://rvbusiness.com/jayco-now-off...-power-system/
The Overlander EXT package offers some additional features like:
Factory installed and backed by a 2 year warranty
Increased efficiency from a Turbo Air 2 12-Volt 13.5K BTU Air Conditioner
Internally heated batteries to allow for extreme cold weather operation
Generator option for an additional modular power source
Lower cost than aftermarket installation
Easily accessible components