Did the test on start up with me on meter at the starting batt and DW on ignition key. Voltage went:
12.71, turn key
10.64, then ignition
14.81, then
14.60 etc. All very quickly.
I didn't have a second assistant to watch the amps to house battery, but I am assuming the 37 amps seen briefly yesterday "went with" the brief moment it hit 14.81 volts in today's test.
Certainly amps to the house battery reflect voltage at the engine battery as it changes--see OP results over time for that.
From the replies it seems "it is what it is" --IE, not going to get much better for amps without an extraordinary bunch of (expensive and PITA) modifications.
I will learn from more experience with the Class C in various scenarios whether it would be worth trying to improve the alternator charging to the house battery bank.
