A group of interacting, interrelated, or interdependent elements forming a complex whole.
When adding accessories to the Rebel build a 2nd 12v system was priority. My goal was for this 2nd system to rely on the main 12v system as little as possible. Having “something” that was not the main starting battery was critical, I didnt have massive power requirements so a single deep cycle should provide plenty of power and reserve. The real goal is to prevent any accessory or luxury electrical item leaving me stranded.
Requirements:
Self sustaining system
Critical systems remain functional while in motion
Critical systems remain functional while parked for 2-3 days
Requires little to no monitoring
Requires no physical effort (no setting up solar panels, flipping switches, or plugging things in, etc.)
I don’t think I have ever gone more than 3 days without “moving” or starting my engine while out camping or exploring. That helped me define the requirements and what my overall “goal” was. As you think if your system and design overall capacity is a very important consideration.
6g welding wire (run from the main battery to the DC > DC Charger)
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The main components are tucked behind the fridge and out of the way, my wiring could use some clean up but it’s functional. I also wanted the ability to tap into the 2nd battery for charging devices and to have an extra 12v plug at the rear of the truck.
This simple box was my solution, it brings 12v power including 2 USB and has a battery voltage readout. This box really brings the 2nd battery into reach for powering devices and also allows me to use my air compressor w/o having to worry about the cable reaching.
Testing
I did plenty of testing – running fridge temps, and freezer temps while documenting battery voltages allowed me to monitor what I can expect for real work run times when not charging. If you are wondering, I was able to get 40 hours at safe battery voltages.
To meet my goals, I added 100w of solar power. This allowed me to do nothing, and have the battery topped off anytime there is sunlight. This is 100% hands off and requires nothing.
I have left the fridge on while the truck has sat parked and after 4-5 days. With good sun the battery is usually still floating around 90%.
