Parts Needed For Running A High Capacity Charge Line To Trailer

Question:

I understand the limitations of the 12V chargefoot line thru the 7way plug and want to significantly improve on that. Im installing a lithium battery maybe 2 in the trailer along with an MPPT charge controller that will take a feed from the vehicle. I understand I need to run a 6 gauge wire from the the front of the vehicle back to the trailer with a high capacity plug and jack like the Pollak 1 or 2 pole units as I expect to be pushing over 25 amps. Here are my questions. 1 Do I need to run a separate ground negative connection thru between the vehicle and the trailer? Or is the physical contact with the hitch sufficient? Im concerned that will not be reliable for this. If separate connection I would use the 2 pole connectors and run short lead to chassis ground on both sides I presume. 2 Do you recommend welding cable or battery cable for these runs? Not sure what the real difference is between them. Or something else? Thanks.

asked by: Mark C

Expert Reply:

Yes, you will need to run a separate ground wire with the main power wire. So it would be best to use the Pollak 2-Pole Socket Connector # PK12801 with their 2-Pole Trailer Wiring Connector # PK12800 for your power wires. The physical connection from the ball mount will not work as an acceptable ground connection.

I recommend using battery cable as a suitable cable for the power wires. If you need help determining the correct gauge for your length let me know how far the cable will be ran be sure to include any changes in direction to your meausrement. Be sure that you use Wire Loom # 7509-10 to protect the wiring from chaffing and any heat shielding if you run near the exhaust or engine components.

This will allow you to use a MPPT type charger like the Redarc In-Vehicle BCDC Battery Charger # 331-BCDC1225D.

expert reply by: Bud M