Single to dual battery guide.

[Elsaetka]

I have searched the forum for a guide on this with no joy, however I suspect I have missed what must be a common enquiry.
Can someone give me a definitive guide to adding a second battery to a single battery model 2.2 Mk7.
Is the van essentially set up ready from the factory given that many are dual battery anyway.
Thanks in advance

[DanMK7uk]

Following… out if interest.

And Tbh I wonder what the advantage of 2 actually is ??

Often one battery failing causes the other to want replacement.

Twice the cost to maintain that area of the van.

Interested to hear

Both my mk7s have single fitted

Cheers

[knobby1]

I have searched the forum for a guide on this with no joy, however I suspect I have missed what must be a common enquiry.
Can someone give me a definitive guide to adding a second battery to a single battery model 2.2 Mk7.
Is the van essentially set up ready from the factory given that many are dual battery anyway.
Thanks in advance

Only the RWD Mk7's had twin batteries from the factory, it was a factory option on the FWD's with specific options. You'll need all the relevant wiring and relays to run the second battery etc...

They aren't just connected in parallel though, the run a "connection relay" to join them together when the ignition is turned on...and disconnected when the ignition is off.

Battery.JPG

Battery1.JPG

Lord Knobrot

[DanMK7uk]

I have searched the forum for a guide on this with no joy, however I suspect I have missed what must be a common enquiry.
Can someone give me a definitive guide to adding a second battery to a single battery model 2.2 Mk7.
Is the van essentially set up ready from the factory given that many are dual battery anyway.
Thanks in advance

Only the RWD Mk7's had twin batteries from the factory, it was a factory option on the FWD's with specific options. You'll need all the relevant wiring and relays to run the second battery etc...

They aren't just connected in parallel though, the run a "connection relay" to join them together when the ignition is turned on...and disconnected when the ignition is off.

Battery.JPG

Battery1.JPG

Lord Knobrot

Whats the advantage or purpose of two batterys me lord ?

[knobby1]

Whats the advantage or purpose of two batterys me lord ?

Some vans are used as work vehicles and the owner/user is in and out of the vehicle often, charging tools, leaving lights on, radio etc....and this can drain the battery to the point where it will fail to start the engine, if fitted, the second battery is a dedicated start battery and is only connected when the ignition is turned on....so even if the front battery is not well, the engine will still start to get you home.

Especially handy if you have a motorhome and tend to use the internal electrics, lights, radio etc when the engine isn't running. The front battery runs everything when the engine isn't running, lights, clock, alarm, radio, central locking etc...this is why the front battery usually fails first. It's not a bad idea to swap them around every 6 months or so to help share the load.

Lord Knobrot

[DanMK7uk]

Well explained

Cheers