Camper Jeff & Kelli,
Is there a cooling fan in the Victron dc to DC unit?
The charging total from the numbers posted suggest about 56 amp-hours went into the 400 amp-hour battery bank.
Were you driving or was this just idling the engine?
Does anyone know the efficiency numbers for the Victron dc to DC charger? (appears to be 87%)
The unit puts out 25 amps at normal input voltage, according to the pdf. That seems a bit strange to me. Perhaps I'm reading the wrong pdf? The "sales" pages says 30 amps continuous to 40 amps, at nominal out put voltage.
From that 87% it appears the alternator had to produce about 65 amp-hours.
The Victron apparently boost charges for 2 hours on the Li settings.
I know my unit does 19.6 amps. It is the 20 amp renogy unit.
I'm glad to hear yours is doing what you need!