battery help please!

[RODAT]

Think I asked a similar Q on here a while back, cant find it, so....
Im not used to these newer transits, only had mk2/mk3....please excuse the stupid Q's!
My diesel mk5 bus has 2 batteries , one left , one right of engine bay.....
Why 2 ? Is one for cranking and the other for everything else? If so, are they both the same ah etc,or is one more powerful?
How are they both kept charged? Split relay?Im assuming there is only one alternator?
I want to fit a split charge relay for a leisure battery to run led lighting and sink and shower pumps which battery do I connect it to n/s or o/s?
Thanks for your time
Rod

[RODAT]

Oops, sorry just found the original thread, cant delete this one, sorry guys!

[matt86_wd2]

drivers side is your cranking battery other is an aux for taillift etc .

matt

[Altransit]

drivers side is your cranking battery other is an aux for taillift etc .

matt

Not necessarily, twin batts was an option on the Mk5 and I think may have been standard on the autos. These are simply wired in parallel to double the battery power
On these, both battery positives will go to the starter motor

[john kyte]

Are the batteries [two under bonnet] in parallel on the 89 Mk 3?

[Altransit]

Are the batteries [two under bonnet] in parallel on the 89 Mk 3?

Quite possibly John, but you need to look and see where the positive leads go, to confirm this

[matt86_wd2]

Not always twin batts for starting. On bros van one is a aux Batt for a tail lift..

Matt