Battery relocation

mr-ed_smt · August 19, 2015, 12:26

When moving the battery to the frunk, what gauge (thickness) wire have people used to run back to the engine bay?

Anonymous · August 19, 2015, 12:40

You need to be careful of voltage drop. I used a company on eBay called simply split charge who made them to my length and fitted terminals, I used 25mm2 cable with an inline fuse by the battery

mr-ed_smt · August 19, 2015, 12:44

Thanks Mark - so you've had no issue with 25mm2 cable then? I was worried it wouldn't be large enough. What size fuse have you got?

Anonymous · August 19, 2015, 13:14

No it's been great, and I use a very small battery with no problems starting or anything untoward. I bought a ctek battery conditioner because I thought I'd have issues with the battery but I haven't needed to use it yet. Not sure what fuse size but I'll check for you

jonty · August 19, 2015, 13:29

Have you got any photos of how you've joined the cables Mark? I'd be interested to see how it all attaches as I would quite like to do this as well, but want to keep it all neat and tidy, which I'm sure you'll have done!

Anonymous · August 19, 2015, 13:50

ill take some.

basically I have a short lead 6mm eye to 8mm eye which goes from battery to fuse holder. Then a long lead with 8mm eye on both ends, going from the fuse holder to a connection terminal in the engine bay where the battery used to be. I routed the cable down the passenger side.

the only complication I have is that I installed a battery master switch in my centre console.

Anonymous · August 21, 2015, 20:42

Here are a few pictures

Engine bay connector box screwed down to the engine mount where the old battery was

mr-ed_smt · August 22, 2015, 12:25

Very useful - thanks Mark. Any idea what size fuse you used?

Anonymous · August 22, 2015, 16:05

Size as in rating or physical dimensions?

mr-ed_smt · August 22, 2015, 16:08

Rating - I presume its a "mega" type?

Anonymous · August 22, 2015, 16:31

Yep it's a mega fuse, I'll go and check the rating, I can't remember sorry!

Anonymous · August 22, 2015, 19:09

Think it's a 175A looking at it

mr-ed_smt · August 22, 2015, 21:31

Cheers Mark - thought it might be around 170A.

Anonymous · August 22, 2015, 21:48

You're welcome

jonty · August 24, 2015, 11:58

Just seen your updates... thanks very much Mark, that's good to see!

Anonymous · August 26, 2015, 15:21

No problem - any more specific ones just ask

dan944 · February 28, 2018, 20:37

Quote from: Anonymous on August 19, 2015, 12:40
You need to be careful of voltage drop. I used a company on eBay called simply split charge who made them to my length and fitted terminals, I used 25mm2 cable with an inline fuse by the battery

What length did you buy out of curiosity? would save me getting a ball of string out.

Also roughly what route did you go? is there anything you would change if you did it again?

1979scotte · March 1, 2018, 08:48

You could do this instead

@dan944

dan944 · March 1, 2018, 09:23

@1979scotte that's interesting!

I was gonna do the usual and stick a varley red top(or similar) up front with a battery killswitch on the centre console so I don't have to disconnect the batteries every time I take the car off the road.

now Im torn $:-\$

1979scotte · March 1, 2018, 11:50

Quote from: dan944 on March 1, 2018, 09:23
@1979scotte that's interesting!

I was gonna do the usual and stick a varley red top(or similar) up front with a battery killswitch on the centre console so I don't have to disconnect the batteries every time I take the car off the road.

now Im torn $:-\$

May not be as easy as it looks tbh.
My V6 only uses the bottle as an overflow so wasn't to difficult to move.
Especially as I didn't have to do it myself.