Glenn, good question but I have no idea what "they" are talking about. I'm rusty as an engineer being so long retired, but believe the laws of physics still apply. Any black box device which converts DC of X volts to DC of Y Volts IS NOT 100% EFFICIENT there are heat losses, same as for Inverters or Chargers etc. I don't understand "never charge battery while hooked up"
If I recall you are going to use a 24 or 48 volt system but need a DC to DC Converter to power up 12 VDC appliances. If so that's all well n good but as you know its NOT 100% efficient.
Perhaps ?? They mean when no load is applied to the devices output it doesn't draw any current from its input source ??? If so I like that !!
John T Sorry I just don't understand what they are talking about
To determine the most weight for the trailer, first look at the weight ratings for your tow truck. It will have a gross weight rating (GVWR) and a maximum towing weight. You need to know that actual weight of your truck as it will be when traveling and deduct that weight (from a truck scale) from the GVWR to determine the maximum hitch weight that can be added. If you deduct actual truck weight from the maximum towing weight that will give you the most your travel trailer can safely weigh when loaded for travel. Most of us on these forums agree that towing anything over 80% of the truck's maximum rated weight for long distances is very tiring and unpleasant. Truck tow weight and GVWR are not intended to be done constantly but are rather a safety rating.