Author claims "This setup is proven to work well". Where is the data to substantiate this claim? Schematic uses a battery isolator from an unknown company instead of a proper DC-DC charger from a reputable vendor. My concern is that someone might burn up their alternator if they follow this schematic.
This is a very simple circuit. Not much to go wrong. I am a degreed Mechanical/Electrical engineer. Yes, both. 40+ years of experience. If its good enough for me, it might be good enough for you. If you want to verify it, assemble it and check it out yourself. If you can improve on it, let me know and I may update the drawing. No rocket science here. I looked for an existing wiring diagram and found nothing, which is pretty crazy considering how common this should be. What kind of data would you recognize as being substantial?
This setup is literally in my car, running my refrigerator right now.
If you don't like that isolator, buy a different one. The Victron Argofet units look ok, but they aren't intelligent.
Note that this circuit is tied to the existing car start battery. If you are not comfortable working with 12 volt power, don't do this.
If you short out your car battery very bad things can happen. If you short out the Lifepo4 battery bad things can happen. Don't do that!
Also, if you disconnect your car start battery while the engine is running, you will blow your alternator. But you don't need this circuit to do that.
