Question for Paul on Dual Batteries

[Blackx]

Hey Paul, I'm thinking of eventually doing dual batteries.  I found the discussion on thenewx but don't know what you ended up doing.  So, what did you do?  http://www.thenewx.org/forum/showthread.php?t=4538&highlight=inverter&page=2

[Paul]

I went with an Optima inside of a $9 plastic tool box, a $30 car stereo relay, and $30 worth of connectors and cable.

I ran a set of heavy gauge wires back from my battery fuse box to a location under the seat. The spare battery plugs into that. There's a high power relay that allows me to disconnect it, or connect it manually, or connect it automatically every time the truck charges. In I leave it in the mode where when the truck is running the relay drops and starts charging the aux battery once the truck starts. If I have to winch for a long period the winch will actually drain the battery faster than the alternator can power it. So I'll split (isolate) the two batteries, drain the one under the hood and then stop winching, connect the second battery to charge into the first one. After about 10 minutes I'll split the two and start with the under the hood battery. I can also split them and let the aux battery run my ham radio and freezer.

I can also lift the battery out and power my ham radio at a remote location as part of my RACES duty. We standardize on Anderson PowerPoles to allow us to connect to each other's gear.

Question for Paul on Dual Batteries

The little switch lights those LEDs to give me a bit of never ending light. Inside the two compartments I keep spare fuses and assorted connection wires.

Question for Paul on Dual Batteries

The big cables.

Question for Paul on Dual Batteries

The schematic diagram.

Question for Paul on Dual Batteries

[Blackx]

Very innovative I like that setup.  I'm not at the point where I need two batteries yet but will keep this in mind.  I think I need a schooling in electrical first

[XterracerX]

Cool setup Paul! I, too, need some serious schooling...

[xperienced]

Nice mod!  I was thinking about running two batteries with a unit from automotive customizers.  Have you had any issues with the LED switch heating up?  I ran a low watt ground through a very similar switch for some roof lights and once the switch heated up I couldn't turn it off.  The isssue was the LED being on for 30 min

[Paul]

No LED heat issues - sounds like you're was being over driven producing more light but too much heat. That's a sure way to shorten the life of the LED.