T6 camper wiring diagram

[sam9green1]

Hi new member, found this wiring diagram online and want to use this as a base for my vans electrics.
Is this diagram a good one to use if not what’s needs changing?
My other question is on cable sizing. I’m looking at 16mm from starter battery to dcdc then after that I’m a bit stuck. I’ve seen different options on different forums so some clarification would be great
All help appreciated
Thanks

 

[kcsun]

I could be wrong ( I usually am) but why do you need the dc-dc charger? I believe you connect the starter battery to the MPPT along with the solar??

kc

 

[ginkster]

I could be wrong ( I usually am) but why do you need the dc-dc charger? I believe you connect the starter battery to the MPPT along with the solar??

kc

DC-DC is to charge the leisure battery from the alternator (via the starter battery) when the engine is running. The MPPT is to charge the leisure battery from the solar panel. Two separate jobs but sometimes combined in one box.

 

[ginkster]

Hi new member, found this wiring diagram online and want to use this as a base for my vans electrics.
Is this diagram a good one to use if not what’s needs changing?
My other question is on cable sizing. I’m looking at 16mm from starter battery to dcdc then after that I’m a bit stuck. I’ve seen different options on different forums so some clarification would be great
All help appreciated
Thanks

View attachment 262598

Welcome. It’s broadly there but a few bits I’d do differently. Those breakers from the MPPT are unreliable (unless you use expensive Blue Sea ones), the 12v loads would be better off the busbar rather than the MPPT, the cable from leisure battery to shunt should be fused as should all the cables off the positive busbar. There are probably other things but not had a chance to look in detail. I’d recommend looking at Nohma.com and explorist.life for some great info.

First step is to do a power audit and work out exactly what you will be using and what you need in the van. That will drive battery size and power and types of charging source. Their placement and power will drive cable size and fuses. For example, no need for a mains charger if you are off grid or no need for an inverter if you don’t need 240v off grid. No inverter means a smaller battery, means smaller gauge cables etc, etc.