Lithium battery charging in FW of truck
Can someone please explain. 2015 F350 alternator 200-220A, wire to rear of truck not clear on gage but about 20’, wire from plug to FW batteries 15’ or more supposedly protected by 30A fuse. I se peop...
Forum Discussion
One thing to realize here is that almost all modern (as in > 2010 or so) alternators are 'smart'. They have a small microcontroller in them and communicate with the vehicles ECU, which can command the voltage output of the alternator and query the status of the alternator. As part of this system there is thermal monitoring of the alternator - it is gets too hot, it will sense this and drop the output voltage and thus the current to reduce the load on the alternator. In this case it is actually worse for the alternator to be connected to a DC-DC charger as opposed to directly to a battery. A DC-DC charger will actually draw MORE current as the alternator output voltage drops.
