You can also tap into the 12V + feed in your trailer wiring harness junction box. It is the line that supplies charging voltage from the tow vehicle 7-pin connector. There should be a couple of places you can tap into that. I would put a switch in the supply to your repeater. If you are not going to use the Go-Power solar connector, then you could use that and just plug it in when you will be towing: no switch necessary that way.
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2020 Eagle HT 30.5 CKTS Modern Farmhouse (16" wheels, spring shackles set on lower hole of frame, SumoSprings TSS-107-40, standard kingpin, B&W Companion slider, TST-507 TPMS, Progressive Industries hardwired 50A EMS HW-50C)
2019 F250 SRW SuperCab 4X4 SB 6.2 (10,000# GVW) 3.73 Axle 18" wheels
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