Member Since: 26 Oct 2012
Location: Bristol
Posts: 2021
Overland Trailer Electrics Help (wiring diagram help please)
When I get home I will be adding the second battery to my set up and I have finally gathered all the components that I will need
So..... I was wondering if someone more knowledgable than me could check over my wiring diagram for the Sankey?
As I see it there are three main parts:
1. Normal supply from both batteries to my distribution board through a Durite selector switch (allowing off, #1 battery, #2 batter or both).
2. Mains charging using the Ctek MX25
3. Charging using a DC source via a Ctek D250s Dual Charger (solar panel and anderson connector from car leisure battery/ alternator)
So the diagram below hopefully brings all three elements together.
Click image to enlarge
One of my main questions is does the diagram work? But also can I place the chargers (both DC and AC) on the main feed out of the selector switch? Obviously both will not be on at the same time, ever, but I have put in a isolator switch to disconnect the DC system when the AC system is powered. Then when the DC is powered the AC 240v will obviously be unplugged (its isolator switch).
My resoning behind using the main out feed form the selector swtich is that when I want to charge each indiviual battery I just use the sleector switch in 'reverse' and select the battery I want to charge. I assume it would work like this?
If there are any corrections would people mind amending please, I really need a diagram to follow I know the diagram could probably be cleaned up but hopefully you get the idea of what I am trying to achieve
Also both my batteries are the same 110 Ah leisure batteries.
Many thanks as always in advance 07 Java Black TD V6 D3, EGRs Blanked, Tow bar, Full dog guard & divider, LED Spots , DRLs, GG ATs, RLD Sump guard, RLD Spare Wheel Protector, D4 LED Rear Lights, Limo tints on boot and Midnight tint on rear windows, Kenwood screen with Garmin nav, Rear cameras, D4 Steering wheel with flappy paddles, T-max split charge system, Tree sliders, Prospeed roof rack & Ladder, Alisport fast road inter cooler,
Massey Ferguson 35x
Sankey Narrow Track Camping Trailer (Gone but to a great home)
25th Jul 2015 12:43 am
chopcat
Member Since: 08 Apr 2013
Location: Pembrokeshire
Posts: 478
to simplify what is going on you can connect all the various charging methods to the two trailer batteeries and then conect those to the car battery when you need to, oresumably when trailing.
You will only have the car amd trailer connected when charging one way or the other and effectively the batteries will balance each other out and you will be charging three. Although I never keep the trailer connected to the car other than nwhen the car is running and on short trips do not bother connecting them at all. I do not use a charger to do this so you can use the solar charger just for that separate from the anderson coneector.
I dont know why you would want to select one battery or the other. You can loose the selector switch and treat as one big battery on the trailer. Switching adds complication which will probably mean at some point one battery will drain into the other and leave you with none.
You want to add an isolator to the 12v out so that when stored the fridge can run direct from the 240supply and everyhing else will be off.
Hope that helps
CCmay the odds be ever in your favor
25th Jul 2015 7:24 am
LandRoverAnorak
Member Since: 06 Mar 2014
Location: Surrey
Posts: 1152
The first thing that strikes me is that the battery selector switch means you can only charge one battery at a time, regardless of which charging source. To be honest, for this application I'd have both batteries wired together in parallel as you don't need to keep one isolated for something mission critical like engine starting. That's the way my old Desert Wolf trailer was configured and it worked well.
You could, if you wanted to, use the selector switch in the supplies from the various charging sources - put the solar on one and both the car and mains charger on the other, as it's highly unlikely that you'd have it plugged into the mains whilst driving Darren
"You came in that thing? You're braver than I thought!" - Princess Leia
Member Since: 26 Oct 2012
Location: Bristol
Posts: 2021
Thanks guys,
CC - the fridge is connected to the 240v system (obviously completely separate) and to the 12v system. So when the main isolator switch is off and the 240v system switched on then the fridge will still run with the 12v system off
LRA - the idea was both batteries would be charged when the selector switch was set to both.
I think you are right I need to parallel them up and treat it as a large 12v battery through a simple on/ off isolator not necessarily a selector switch. I like the idea of using the selector switch though to isolate the two charging systems from each other. As you said I won't be driving with it plugged I to the mains. I will also only be using the anderson connector to the car on long journeys and when the engine is running
I will rework the diagram and get back to you
Thanks07 Java Black TD V6 D3, EGRs Blanked, Tow bar, Full dog guard & divider, LED Spots , DRLs, GG ATs, RLD Sump guard, RLD Spare Wheel Protector, D4 LED Rear Lights, Limo tints on boot and Midnight tint on rear windows, Kenwood screen with Garmin nav, Rear cameras, D4 Steering wheel with flappy paddles, T-max split charge system, Tree sliders, Prospeed roof rack & Ladder, Alisport fast road inter cooler,
Massey Ferguson 35x
Sankey Narrow Track Camping Trailer (Gone but to a great home)
25th Jul 2015 12:23 pm
sailorboi
Member Since: 26 Oct 2012
Location: Bristol
Posts: 2021
Something more like this:
Click image to enlarge
Using the selector switch for the charging circuits as suggested and just one main isolator for the batteries on/ off.
Only thing I am not sure of is have I put the positive out of the selector switch joining the batteries in the correct place?
07 Java Black TD V6 D3, EGRs Blanked, Tow bar, Full dog guard & divider, LED Spots , DRLs, GG ATs, RLD Sump guard, RLD Spare Wheel Protector, D4 LED Rear Lights, Limo tints on boot and Midnight tint on rear windows, Kenwood screen with Garmin nav, Rear cameras, D4 Steering wheel with flappy paddles, T-max split charge system, Tree sliders, Prospeed roof rack & Ladder, Alisport fast road inter cooler,
Massey Ferguson 35x
Sankey Narrow Track Camping Trailer (Gone but to a great home)
25th Jul 2015 1:00 pm
chopcat
Member Since: 08 Apr 2013
Location: Pembrokeshire
Posts: 478
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