No, I've got a separate battery that's currently not tied into the truck's electrical system at all. It's a box I built myself from a 24V 50Ah battery and a Front Runner Wolf Pack Pro box (which is convenient because it is the exact height to just slide under the canister for my retractable tonneau cover). Then I've got a 24V to 13.8V regulated converter, to power my 12V devices, which honestly, is everything other than my fridge, which can operator on 12V or 24V (In retrospect, a 12V battery with a 13.8V regulator would have worked just as well, and been a somewhat simpler setup).
I built my own because the commercial offerings focus mainly on AC outlets, which just low amperage DC outlets. They seem to be in an arms race of one-upping each other in number of AC outlets and AC wattage. I don't need AC, and if I do, I could either add a small inverter, or I do have a small Bluetti EB7A with up to 400W AC (or use the 400W inverter in the back seat). Plus, I've got the advantage that this fits under the tonneau canister (I actually re-did the box once, because the first box I put it in didn't fit under there).
On top of the tent, I have 350W of flexible solar panels. When we took a trip to the Rockies this past summer, they performed like a champ, easily topping off the battery each day. Around where I live (Georgia), we have a lot more trees and clouds, but for a weekend trip, this should do fine.
We are planning a fall trip up the East coast, and for that, I'm thinking about adding a DC-DC charger to help keep the battery charged, as I'm less confident the solar will be sufficient on that trip.
I've consider—and to some extent, still am considering—other setups, like a dual purpose (starter/deep cycle) battery from Antigravity and others, or relocating the aux battery to either under or behind the rear seats, but my current setup works well enough. Having the batteries inside the cab would be beneficial in hot and cold weather. LiFePO4 batteries can't be charged below 32º, but the Victron system I've got will shut off solar charging (and DC-DC, if I add that) in low temps. So my current setup is more than sufficient. I just can't stop my brain from thinking about other approaches.
In this photo, you'll see the solar charge controller (blue box, mounted to the bed), and some wires: from the tent-mounted solar panels to the charge controller, from the charge controller to a Anderson port on the side of the box, and from an Anderson port out through the front stake pocket hole to the junction box you saw on my previous photo. That last pair of wires feeds power to the tent, as well as some pod lights I added to the rack.
On the front of the battery box are two more Anderson SB50 ports. The blue on left is 24V, and I mostly use it to charge the battery with an AC-DC charger to top it off before leaving on a trip. Grey on the left is 13.8V, and before I made the changes in my last post, is where I would have connected my air compressor. Below each of the SB50 ports are Anderson Powerpole connectors; I use the 24V connectors for my fridge, and the 12V connectors are there just for the heck of it.
The LED light strip above the battery box is on the underside of the canister, and it's tied into the factory bed lights (there are also strips on each side of the bed). They are not tied to the battery box in anyway.
Long story short, I might have done things a little differently, but this works well. It was also a fun project. Systems from Jackery, Bluetti, EcoFlow, etc. would be more turn-key, but none of them offer exactly what I'm looking for.
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