How much battery charging from alternator?
Having spent a few years here I often read about the concept that while a typical trailer wiring connection from the vehicle to the camper will supply 12V, it is of low amperage and as such the camper...
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The trailer brakes, while underway, use the hauling vehicle's battery through the brake controller. The emergency brake-away power through the break-away switch is delivered by a battery on the trailer.
