Have I missed anything?!?!?! Will this end in flames?!??!?!

[JD01]

Hi folks,

This is highly cheeky asking this question on T6 forum but the forum has been a gold mine of knowledge so perhaps some kind soul might be able to help me out!

Hoping to get some eyes over my wiring diagram for my transit minibus conversion. It's a 2015 Transit (Login • Instagram) and i'm about to start running some cables. Electrics are new to me and i've spent a fair while trying to learn over the past few months. I would really appreciate it if someone with more knowledge than me could take a quick look at the diagram.

The plan is to have a 220ah AGM battery under the passenger seat (the starter batteries are under the drivers seat) with the plan to run cables to the rear wheel arch where the electrical cupboard will be.

Any advice would be much appreciated!

Many thanks,

 

[JD01]

Here's a better resolution of the image!

Image Link

 

[Skyliner33]

Couple of comments no fuse needed in solar +ve.
Is that a BMV 712? Where is the +ve lead?

 

[Skyliner33]

Here's a better resolution of the image!

Image Link

I cant see that

 

[JD01]

Cheers!

Yes still need to add that!

According to the Ctek manual the Solar + needs fused

 

[JD01]

Hopefully this link works!

Main Electric Diagram.jpg

drive.google.com

 

[T6Jay]

If it was mine, I'd upgrade the EHU charger to one that could supply all the 12V devices, 7A seems too little.

Also, it's impossible to isolate the 12V devices from the battery while charging, is that your intention?

 

[JD01]

If it was mine, I'd upgrade the EHU charger to one that could supply all the 12V devices, 7A seems too little.

Also, it's impossible to isolate the 12V devices from the battery while charging, is that your intention?

Hey man,

Cheers for your comment! I'm not sure what you mean by this... does this represent an issue?

Cheers!

 

[T6Jay]

Hey man,

Cheers for your comment! I'm not sure what you mean by this... does this represent an issue?

Cheers!

CHARGER SIZE

If you plug in to the campsite Hook-Up (EHU), the charger in your diagram will supply a maximum of 7A. If your fridge and heater run at the same time, it's likely to require more than 7A, even if the battery is not charging. So, if you need to run the DC circuits from the battery charger (when the battery is flat/low), you probably need a bigger charger. If you also want to charge the battery at the same time, you need an even bigger one.

Also, a 7A charger will take about 18 hours to charge your 220ah battery from a 50% charged state, longer if the DC loads (fridge?) are on.

I have a similar setup to you, except with only a 100ah leisure battery, and I chose a 15A battery charger. This will run all of my DC equipment, and still have some capacity to charge the leisure battery at the same time.

I think for you, 15A is the minimum charger size you need, just my opinion tho!

ISOLATOR

You show an isolator between the STORAGE battery and the 250A bus bar. I'm not saying it wrong, but just pointing out that when the isolator is off, the EHU can't charge the battery. What is your intended purpose for this isolator?

 

[JD01]

Ah I get you now cheers! Thanks for the advice i'll swap out a bigger charger.

The purpose of the isolator switch there was really just if I was doing work to the system or when the van isnt in use for a while as I read the battery charger can sometimes draw some amps from the battery

Thanks again!