DC-DC Charging ?
When you add a DC-DC charger from the truck as in several threads about that, does that put the house batts in parallel with the engine batt? (as with normal "alternator charging" via 7-pin) Or is...
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I ran 2 x 6v golf car batteries and charged them through a diode isolator in our camper outfit in the 2000's. Dodge diesel with 160amp alternator. I connected with an Anderson plug and used big cables. "Charge wire" disconnected in the 7way camper cord.
Never did get around to doing a solar spend on that camper - we didn't sit for much more that 3 or 4 days, temps at just below freezing or above, no inverter/AC loads, outside doing stuff all the time, never ran out of DC power. If batteries got a bit low in cold weather I would start the 300hp Cummins generator. We weren't full time but trips lasted 7 to 30 days a couple times a year.
The DCDC charger is a more sophistimicated version of what I had before, adjustable for different batteries, controlled output. Near as I can figure.
I think it is important not to have a second connection between the house batteries and the truck via the 7 way plug.
When sizing wiring and connectors for the Renogy "40 amp" unit I have, I think the literature states input current is 1.3 times what output is so 40amp output will be running 60amp on the input side. I see Marinco trolling motor connectors rated at 70amp.
Never did get around to doing a solar spend on that camper - we didn't sit for much more that 3 or 4 days, temps at just below freezing or above, no inverter/AC loads, outside doing stuff all the time, never ran out of DC power. If batteries got a bit low in cold weather I would start the 300hp Cummins generator. We weren't full time but trips lasted 7 to 30 days a couple times a year.
The DCDC charger is a more sophistimicated version of what I had before, adjustable for different batteries, controlled output. Near as I can figure.
I think it is important not to have a second connection between the house batteries and the truck via the 7 way plug.
When sizing wiring and connectors for the Renogy "40 amp" unit I have, I think the literature states input current is 1.3 times what output is so 40amp output will be running 60amp on the input side. I see Marinco trolling motor connectors rated at 70amp.
