Dual batteries

[secretagent]

I'm going to a dual battery set up and just bought the 'PERKO' marine type dua; battery switch that allows the batteries to be off, run one or both (it's the same switch that SOR sells) Do i need and isolatoer also if I'm running one of these switchs? If not will this switch allow both batteris to be charged at once even though I might only be using one? Long question but couldn't think of a more knowledgable group, Thanks.

 

[Landpimp]

no need for an isolator, and yes I am almost sure both will charge when in the 2 position as this is what I run in my boat.

 

[drohweder]

The perko swicth controls your output to the starter, winch, aux stuff...whatever. Unless you are running two batteries in parallel with one charge wire then you do need an isolator or solenoidd to control the charge to the battery from the alt. If you run it in "both" with one charge wire the regulator will read the voltage of your linked batteries. Once charged you could switch to "1" and save the other battery (now getting no charge) for an emergency.

I just got done with my set up and it seems there are a number of ways to set these up and its all pretty intuative once you understand how the parts work.

Here is my system.

Alt charge wire--> Isolator, splits charge wire to 2 batteries
Regulartor senseing wire to battery #1 (to compensate for the 0.75v drop across the isolator
Both - posts linked and grounded to frame.
Seperate + cable from each battery to pergo switch-->output to starter for now.

so constant controlled charge, and no drain on each battery. Can use 1,2 or both batteries to start truck. I eventually will use the output to a winch, am wiring an aux fuse box straight off #2 and will self jump by swapping cables if needed in the future.

This is a new system so if I fawked it all up someone tell me quick.