time2roll wrote:
60 amps is probably higher than the designed add-on accessory load for the vehicle. Assuming it is a diesel the grid heater or glow plugs may also add significant 12v load. You could reduce the issue by not immediately turning on the A/C and running lights etc.
The opening statement is probably true. The good news is that the modern "smart charging" systems will increase the engine speed to get the most out of your alternator.
I don't know how DC-DC chargers control the current draw. As the input voltage goes down, the input current (amps) goes up. I am sure there is some smarts in the charger to prevent "bad things" from happening. The fuse in the charge line to your RV is the limiting factor. Typically 50A ?
Not running the A/C or turning on vehicle lights say for the first 10-15 minutes will help.
