Charge Batteries by Idling Tow Vehicle?
This may be a dumb question, but since every tow vehicle has a generator which is connected to the batteries and they charge while driving, how about hooking up and charging at the campsite while idli...
Forum Discussion
j-d wrote:
charging the battery in a fiver through the Seven-Wire from a V10 pickup takes all day, even at road speed.
Yes. Because 7-pin wire is thin.
Won't the truck's alternator bring the truck's battery up to charge quickly and probably first? If so, won't it then throttle down and offer decreased voltage to the Seven-Wire therefore the trailer's battery?
With a HUGE empty battery of trailer connected in parallel to SMALL starter battery, the total bank voltage will average between the two and becomes close to the trailer voltage. So alternator will keep on pumping 14.5V until trailer battery is near full.
Motorhomes are a different breed, charging on the road makes more sense (though mid-size solar is still a plus). Wires in MH are thicker than in 7-pin plug and (I guess) there are devices limiting the charging of one bank when another one is already full.
