Relay Wiring for Arrid Twincharge

Gidday all,

when wiring up an Arrid Twincharge is it really necessary to wire in the relay for a compressor fridge? I would have thought that my Engel, drawing say 2.5 amps at most, would not make a huge difference to the charging times whilst travelling (seems, to me anyway, that it is a lot of rigmarole for minimal gain). I'll also be using a Redarc Smart Start for the isolation between main and auxillary.

Any and all expert advice appreciated.