Battery charging from shore power?
Stock, do most trailers charge the batteries when they are hooked up to shore power? Or does that occur when the trailer is hooked up to the tow vehicle?
Forum Discussion
Vulcan Rider wrote:MEXICOWANDERER wrote:
The trailer batteries charge 10 times SLOWER when the truck is recharging them.
Maybe true if some configurations but not mine.
When the truck is running, the "trailer" batteries show about 14.3 volts. When the gen or shore power is active, they show in the mid 13's. I'd say the truck is charging them more.
You can guess at that, but you really need to see the amps to the battery for each method over some time.
The 7-pin can be a bit higher in voltage at first, but be really lame in amps due to long thin wire, and also by the action of the alternator reacting to heating and to the truck battery SOC rising quickly, so the alternator drops to 13.8 quickly too, reducing amps to the batt via 7-pin to a trickle.
