Is the house battery sufficiently charged? Or is it lacking?I have a house battery and relay installed by GTRV in my 2016 Metris camper. I can tell you that there is a lot of time when the engine is on but not sending a charge to the house battery. I'm not sure the reason this is so, but I can tell by the house battery's volt meter. So the video seems oversimplified.
The Metris charging system uses a smart alternator which only charges the battery when needed, preferring to reclaim excess power during braking and downhill coasting, sort of like the regen system in a hybrid... The alternator only engages in direct charging when the battery falls to an insufficient level.