Thread: Dual battery setup for 70 series cruiser

The Redarc systems are very straightforward to build yourself, if you're that way inclined. All about proper cable termination, proper crimps, solder, the right gauge cables. In my Hiluxes, I've got them installed in the tray, inside a Frontrunner Wolfpack box, with the batteries.

You should make sure your alternator is up to the job. When the aux battery(s) are discharged, and the Redarc charges in bulk mode, it will pull a lot of amps from the alternator. I see your Cruiser is getting on a bit, so I'd start with the alternator, easy to check and upgrade especially seeing as how you won't have any complicated electronic engine management to worry about. A strong cranking battery is also important, if you are running the accessories a lot and only running the truck for a short period, the cranking battery won't get a fair go and if its already tired, it might let you down.

The last thing is always follow the instructions, ha ha. We've helped a few blokes in Aus with their homegrown electrics, particularly in RVs and caravans, and when there's a problem its almost always because of poor installation. These systems can create a fire just like that, due to poor terminations, loose connections, incorrect wire gauge or stepping down the gauge from large to smaller on a high current connection (not uncommon!).

One of my systems had a hot moment not long ago due to a loose connection and it melted cable insulation and thankfully made a bad smell which was what told me I had a problem. Totally 100% my fault.