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
MEXICOWANDERER wrote:
The trailer batteries charge 10 times SLOWER when the truck is recharging them. Something to keep in mind. Most trucks can do little more than TRICKLE CHARGE trailer batteries. Just trying to keep a little perspective here...
Mex, picky-picky, but we old guys still try to speak English and remember our Grade 3 ( 3rd Grade in USA-speak) Math usually. You of course, meant to say, "At one-tenth", and not, "Ten times SLOWER"-- I hope. :)
I find the 7-pin starts out at maybe 10 to 15 amps, but in a minute or three is down to 5 amps no matter how low the batts in the trailer are.
It has to do with the un-modified alternator in the truck acting as designed to reduce voltage quickly for the truck battery's sake after starting up, and is also due to the long thin wire back to the 7-pin.
