I think I'll let go with the one Truecharge until I get a another 25+ amp charger.
As I have the other Trucharge wired into my jeep to charge it's main AGM battery and another Group 31 I stick into the Jeep for off-road use. I use a 200+ amp isolator to bring the aux. battery online when travling and/or off-road.
I tried using a laptop and a few other electronics with one main starting battery but it just didn't work unless the engine was running most of the time. The aux. electronics kept draining the starter battery.
So when I'm at home I plug in the other Truecharge designed for two batteries into the jeep, where I've installed aux dc breaker panels.
Trying to mix auxiliary electronics with OEM isn't imo a great idea especially with newer vehicles that use computers, sensors, low voltage wiring connected to sophisticated electronics. many of the aftermarket electronics for vehicles have instructions for people to start splicing and tapping into the OEM wiring which potentially may work, however down the road mixing aux. with oem often causes problems. Which can potentially cause problems with sensitive electronics. Most modern vehicles rely on 5 VDC and millivolt data wiring. Where corrosion and grounds becomes a problem as a vehicle ages.
With road vehicles what I normally do is separate the aux. wiring from the OEM using separate cables and fuse panels.
