Originally Posted by steve dunham
Since the trailer is 12 VDC (nominal ) and the vehicle is 12 VDC
(nominal ) and DC does not have a sine wave so you can't be out of phase , I don't see an issue assuming there are no other electrical
issues or problems.
my vehicle outputs 14.4V when its first been started... now if there's significant current at the trailer jack, the wiring resistance drops the voltage. meanwhile, the Parallax DC converter is(was) trying to output 13.6V or so to charge the battery
... depending on the design of the Parallax's output stage, this *could* back bias its output transistors and dump a bunch of current into them.
Its also quite possible the parallax just picked that dry camping
weekend trip to die. I'll never know, its in the ejunk bin at the local recyclers.