Eric,
I'm no sparkie, but the idea that a 17amp battery gets drained by a mount in one night seems starnge, no doubt someone else witrh the required nouse will pipe up here.
If you are near power, perhaps try what I use.
I have a pier in the ground, which I place the mount on. It is near the hanger, and in placing the pier into the ground I also laid a wire from the hanger to this pier. Inside I have an old computer power supply feeding 12 volts down this wire. At the pier end I have about 4 RCA plugs, facing down to avoid the weather, and I use these for dew heaters, etc. I have also one specifically for the mount. It seems to handle it all well. Of course, if you are not close to power, the idea falls apart.
Gary
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