Quote Originally Posted by gemoc1 View Post
Gday, the maverick i just bought has a dual battery setup with two batteries in parallel.
Hence, when its running both batteries are charging and both batteries voltage is used entirely when starting the car.
What would be the best way of rigging up my own switch (at a small budget), so i can select which battery i want being used and when??
ie: one battery for accessories and one for just starting and lights etc.

Cheers
As Drewboy says, a smart solenoid ((Voltage Sensitive Relay-VSR) is the way to go. It allows the 2nd battery to be charged but prevents the starter battery being discharged. Unfortunately you just missed someone selling one here - I think it went (used) for $40 or $50. There are other ways, but this is the best fit & forget budget option.

http://www.ebay.com.au/itm/REDARC-SB...item460a769ead

You can get one a bit cheaper on from other sellers on Ebay, but if you buy from a non authorised Redarc reseller you will have no warranty. This seller is an authorised reseller.