Dc-dc charger ex rac

[Pwood811]

So I have a ex rac t6 with the auxiliary battery already installed. I’m looking to change the vsr. I have been looking at the 50a renogy dc-dc charger. I’ve been reading a few threads on this, is the standard cable size from the starter battery big enough and is it just a case of cutting the ends off and adding fuses on and so forth?
I’ll be looking at upgrading the battery in the future.

 

[JoshB_]

It’s 50A, so you’ll need at least a 6sqmm cable. Is it the factory VW cable? Which I think is 10mm from memory…
I put 16sqmm in from my starter batt to the 50A charger, but only because I had some left…

 

[Pwood811]

Yes it’s the factory Vw cable. So should be all good then

 

[Salty Spuds]

So I have a ex rac t6 with the auxiliary battery already installed. I’m looking to change the vsr. I have been looking at the 50a renogy dc-dc charger. I’ve been reading a few threads on this, is the standard cable size from the starter battery big enough and is it just a case of cutting the ends off and adding fuses on and so forth?
I’ll be looking at upgrading the battery in the future.

When I upgraded my T5 factory 2nd battery split charge system to a B2B, I left the factory electrics exactly as they were, left the split charge relay & associated fuses in place. I simply removed the output from the split charge relay from the battery & used it as the input to the B2B. The output from the B2B then went to the battery. So in a nutshell, I placed the B2B in series with the SCR & battery, job done. The factory SCR wiring & fuses were 90A iirc. The B2B was a 30A, so all good to go. The advantage of doing it this way, is that the SCR acts as an ignition controlled isolating relay.