Can You Use the Hopkins Engager Breakaway Kit to Charge Two Batteries

Question

Question:

Can I charge a second battery with of the trailer break battery? Want a dedicated battery for interior trailer lights.

asked by: Tom L

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Expert Reply:

Yes you can use the Hopkins Engager Push-To-Test Trailer Breakaway Kit w/ Built-In Charger # 20099 to charge your second battery but you're going to need to add a diode # RM-690 so you don't drain both batteries since they'd be on the same circuit.

expert reply by: Bryce D

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Diode Wiring Diagram
(click to enlarge)

Answer 1

For a diode I recommend #RM-790 which is rated for 85 amps. However, trailer wiring, both on the trailer and on the vehicle side, is too small to charge up a regular battery. And most vehicle alternators are unable to push back the amperage required…

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Answer 2

You do not need to have a diode between the two 12 volt batteries on your trailer and tow vehicle but it is not a bad idea either. The Roadmaster Single Park Light Diode part #RM-690 will work perfectly for this. The factory 12 volt pin on most 7-way…

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Answer 3

Battery chargers do get hot, especially if plugged in for long periods of time. If it is so hot that you can't even touch it then that would be a problem, a short somewhere either with the wiring or internal on the charger. On the wiring make…

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Answer 4

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 5

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 6

Hey Andrew! Yes, Furrion does have a Chill Cube model with a heat pump. This was actually just released for aftermarket sale. You will need a complete system to make the switch, new R32 units aren't backwards compatible with old R410A systems.…

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Answer 7

Hey Bryan, that's a good question. The pricing can definitely be misleading, but I wouldn't use it to judge the quality of the tire. A lot of that comes down to promotions, inventory, and whether you're looking at a tire by itself or…

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Answer 8

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 9

That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…

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Answer 10

Hey Kelvin, welcome back. To flat tow a 2026 Ford Maverick with your Demco Commander II Tow Bar item #DM9511012, I recommend the following parts: Baseplate Kit - Demco Tabless Base Plate Kit item #DM38CV Wiring Harness - Roadmaster Diode 7-Wire to…

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Answer 11

Hey Jairo. So we do not offer a direct replacement for the Norcold N611, but we do have a good replacement option for you. It really comes down to what will fit in your cutout space. Take a look at the Norcold RV Refrigerator w/ Freezer - 8.2 cu ft -…

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Answer 12

Hello Bruce, Thanks for writing in! Using butyl tape between the trailer body and the Single Axle Jeep Style Trailer Fender - Diamond Plate Aluminum - 13" to 15" #HP96VR is exactly the route I would go. It stays flexible, creates an…

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Can You Use the Hopkins Engager Breakaway Kit to Charge Two Batteries

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