The T2160 is a 12V Unit, no inverters.
I don't know what wiring is in your van (It is a bit different from the normal Autotrail/Sargent combination I think?) so you may have suitable wiring in place but typically you would either have to run decent (4mm2 or 6mm2) cabling from the
battery to the Fridge (bypassing the box that disconnects the 12v Hab electrics when the engine starts) or use the 12V cabling that is in place from the 12V-when -driving supply and redirect that supply to the Leisure
Battery (whichever is easier).
What I liked about the T2160 is how you can turn the freezer off while leaving the Fridge when you don't need it and want to save power.
Jacksons is actually one of the best prices for these Thetford units as well - most outlets seem to be hundreds more!