How Much Power Should I Make Available To Charge My Trailer Battery

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Question:

I have installed this kit onto my trailer. Now Im installing a seven pin connector to the RV that will be pulling it. The RV doesnt have any wiring in place yet. For the black power supply 12 volt wire, how much capacity should I give it to charge the battery? I will be wiring directly from the RV engine battery and will be putting a circuit breaker or fuse close to the batteries. What size breaker or fuse should I ? I would like to use 12 gauge wire or smaller for the run.

asked by: JD

0

Expert Reply:

You will have to use 10 gauge wiring, part # 10-2-1, because the wiring run you need will be longer than 25'. You will also need to install a 4-way connnector on your motorhome before you are able to install the 7-way connector. The Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness with Installation Kit, part # C59496, will work for your motorhome. Once you get this installed, you can install the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires, part # ETBC7, you will get a 20 amp, 30 amp, and 40 amp circuit breaker with the kit. The 40 amp circuit breaker will go between your RV battery and the 12V hot lead of your 7-way connector. You will use either the 20 amp or 30 amp to go between the battery and your brake controller, if you install one. Your setup will not provide amperage to charge your RV battery.

I have included product description links, a weblink to wiring your vehicle with a 7-way connector, and video review links below.

expert reply by: Mark Smith

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Recommended Wire Gauge For Length Of Run
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Answer 1

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Answer 2

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Answer 3

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Answer 4

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Answer 5

Hey Brad, the Tekonsha 4-way kit part #118648 is the correct fit and best option for your 2015 Toyota Sienna LE. Then for a 7-way adapter the part #C57672 that you referenced would be exactly what you'd want as well. Does the trailer have brakes?…

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Answer 6

Hey Yussel, congrats on the new hobby. To replace the bearings on your 2020 Apex Nano 213RDS you'll need the inner bearing item #L68149 and the outer bearing item #L44649. The inner one is bigger so it will be closest to the trailer on the inside…

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Answer 7

Hey Skip, for a new 7-way and 4-way at the rear of your 1999 Ford F-350 you would want the Hopkins part #HM40975 and then for a kit to install a 7-way in the bed of your truck you'd want the part #41157. This part number comes with the harness…

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How Much Power Should I Make Available To Charge My Trailer Battery

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