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Trailer Breakaway Kit Battery Charger

Hopkins Accessories and Parts

ratingratingratingratingrating (12 reviews)


Code:   20011

Retail:$8.95

Price:$6.99


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Shipping Weight: 1 pounds

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Hopkins Accessories and Parts - 20011

Replacement Battery Charger for Trailer Breakaway Kits

  • Black wire is connected to the vehicle battery to get the charge
  • Red wire is connected to battery in the breakaway kit on the trailer
  • Blue wire is connected to the breakaway switch




Video of Trailer Breakaway Kit Battery Charger


Videos are provided as a guide only. Refer to manufacturer
installation instructions and specs for complete information.

Video install hopkins trailer breakaway kit battery charger 20011
Hopkins Trailer Breakaway Kit Battery Charger Installation

Video Transcript for Hopkins Trailer Breakaway Kit Battery Charger Installation

Today on this enclosed trailer were going to install part number 20011 from Hopkins. This is their trailer breakaway kit battery charger. Right now, looking at our trailer the way its hooked up is that it does not have a battery charger. It has a 12 volt power lead coming off the towing vehicle going straight to the battery that will charge the battery, but over time that could overcharge the battery, especially on a long trip. Were going to install our battery charger. The first step is we will go ahead and locate the wiring that comes off the battery charge from the towing vehicle and we will hook that up to the black wire.

Next we will go ahead and take the red wire and we will hook that up to the battery on the trailer, that way the battery will be getting a charge. Now the blue wire coming off the charger will go out to our breakaway switch. You can use a variety of different connections. In this case we will be using wire nuts. Once our connections are made we can take our charger and tuck it in next to the battery.

With that, that will finish it for our install of part number 20011 from Hopkins on this enclosed trailer.


Customer Reviews

Trailer Breakaway Kit Battery Charger - 20011

Average Customer Rating:  ratingratingratingratingrating4.9 out of 5 stars   (12 Customer Reviews)




- 20011

ratingratingratingratingrating by: A. Gale06/18/2011

Is this review helpful?


It gives me peace of mind knowing that my trailer battery is being charged while I'm driving down the road on a trip since the trailer/battery sits most of the year. This item was easy to install. The harder part was the van wiring, connecting a wire to the van's trailer connection so that the charger thing could work.17241



- 20011

ratingratingratingratingrating by: Derek12/23/2013

Is this review helpful?


I bought TR20048, and after about 2 years the charging circuit started malfunctioning. There are no replacement parts for TR20048. So I removed the original circuitry from the TR20048 and replaced it with 20011. 20011 does not have LED indicator lights, but it charges the battery without overcharging and is very inexpensive.110988



- 20011

ratingratingratingratingrating by: Arthur03/14/2013

Is this review helpful?


A simple low cost solution that is easy to install. Installation took about 20min. In my opinion every trailer from the factory should have these pre- installed but many don't and without one the small breakaway battery will charge at too high a rate and probably overcharge, both of which can shorten the life of the battery.70657



- 20011

ratingratingratingratingrating by: Bob P09/13/2013

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I have installed the battery charger, and it seems to be working fine. I was impressed with the quick delivery and good packing.99838



- 20011

ratingratingratingratingrating by: Dave09/07/2013

Is this review helpful?


Good product at a good price. Excellent shipping price with fast delivery.98808



- 20011

ratingratingratingratingrating by: Bob Owen07/08/2013

Is this review helpful?


Ad advertised...Easy install...quick sh ip 88399



- 20011

ratingratingratingratingrating by: Robert S06/25/2013

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exactly what i need and at a great price 86105



- 20011

ratingratingratingratingrating by: Jim S.05/22/2013

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This charger is well worth the money. 81478



- 20011

ratingratingratingratingrating by: John04/15/2013

Is this review helpful?


Product was as advertised.....Easy to hook up.76221



- 20011

ratingratingratingratingrating by: Brandon04/04/2013

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exactly as described 74145



- 20011

ratingratingratingratingrating by: gene05/10/2011

Is this review helpful?


recieved in good shape and what i wanted thks13175



- 20011

ratingratingratingratingrating by: Dan06/20/2011

Is this review helpful?


speedy shipping and works GREAT, until next time thank you!!!!!!!!!!!!!!17484



Ask the Experts about this Hopkins Accessories and Parts
Expert Answers about Trailer Breakaway Kit Battery Charger - 20011                                             Do you have a question about this Accessories and Parts?


  • Trailer Breakaway Kit Battery Charger Wire Functions
  • Each of the wires on the Trailer Breakaway Kit Battery Charger, part # 20011, have a specific function, but none of them are grounding. The black wire goes to your vehicle battery, the red wire goes to your trailer breakaway battery, and the blue wire goes to your break-away switch.
    view full answer...

  • Trailer Breakaway Kit Battery Charger 20011 Operating Temps, Current Draw, Type of Charging
  • I spoke with a technical adviser at Hopkins, the maker of this charger and he said the safe operating temperatures for this Trailer Breakaway Kit Battery Charger, part # 20011, is between -20 degrees and 140 degrees Fahrenheit. The max current draw is 5 amps and uses a trickle charger, yet shuts down when the charger is full.
    view full answer...

  • How Large Of Battery Can Hopkins Trailer Breakaway Kit Battery Charger # 20011 Trickle Charge
  • I contacted our representative at Hopkins and he informed me that the Trailer Breakaway Kit Battery Charger, part # 20011 can charge batteries of different sizes, even large batteries, it will just take a bit longer. He informed me that part # 20011 will trickle charge your regular 12 volt battery just fine. If you do have the vehicle battery connected directly to the battery on trailer it will keep sending power to the battery even after the battery is charged, which could be bad for the ba
    view full answer...

  • How to Charge Two 12 Volt Batteries on an RV Towed by a Ford F-150
  • The 12 volt circuit on a 7-Way trailer connector can provide a maintenance charge to a 12 volt battery but it will not be able to fully charge it because the wiring for a 7-Way is too small to carry the current required. What you can do to charge the batteries on the RV is to first install a battery isolator, # TR118665, in the truck. You will need to attach one terminal to the positive on the truck battery and then connect the center terminal to a 12 volt ignition source (something that is o
    view full answer...

  • How Does a Break Away Battery Charger Wire Into a Trailer Break Away System
  • A break away switch, like # HM20010, has a pin it that when pulled out completes a circuit from the battery mounted on the trailer to the trailer brakes. This allows the battery to apply voltage to the trailer brakes to stop the trailer should it become disconnected from the tow vehicle. The charger, # 20011, receives 12 volt power from the tow vehicle on the black wire. It sends this power to the break away battery on the trailer to provide a maintenance charge along the red wire. The blue w
    view full answer...

  • Do Trailer Breakaway Batteries Apply Enough Power for a Dual Axle Trailer with 4 Brake Assemblies
  • Any battery that is used in a breakaway system on a trailer needs to be able to sustain full braking power to the trailer brakes for at least 15 minutes to be in compliance with various laws in regions that require breakaway kits. The batteries we sell meet the requirements and where designed for that purpose for 2 axles. Always make sure that brake away batteries are fully charged before using them. The Engager Trailer BreakAway Kit, # 20099, is our most popular option. It comes with a charg
    view full answer...

  • Trailer Brake Controller Only Works with Pin Pulled on Trailer Breakaway Kit
  • This does sound like a short or a ground issue. It could also be corrosion inside or on the trailer connectors. You can test the charger by applying 12 volts of power to the power wire on the charger and then testing the output side to the breakaway battery on the trailer using a circuit tester like # 3808 to see if it is applying power to the system. Make sure that all ground from the main trailer connector, to the breakaway system, and on to the brake magnets are all grounded to clean and
    view full answer...

  • Will the Hopkins Trailer Breakaway Battery Charger Work for an Auxiliary Battery on a Trailer
  • Yes, you can use the Hopkins Trailer Breakaway Kit Battery Charger, # 20011, with the motorcycle battery on your motorcycle trailer. Like you said, you would simply tie-off the blue wire since it will not be used. This charger will maintain the charge on your battery and even provide a small charge when you are connected to the tow vehicle. The benefit of adding this charger to your battery is that the charger will stop sending power to the battery once the battery is fully charged. Overchar
    view full answer...

  • Installation Direction For Trailer Breakaway Kit Battery Charger, part # 20011 on a 2013 GMC Sierra
  • When installing the Hopkins Trailer Breakaway Kit # 20011, the black, red and blue wire are attached with the following procedure. The black wire is connected to the black wire in the battery box on the trailer. The red wire is hooked to the positive post (by itself) of the battery on the trailer and the blue wire is spliced to the blue wire from the breakaway switch. I have attached a FAQ article covering breakaway kit installations as well as a brief installation video. I can help yo
    view full answer...

  • Trailer Breakaway Kit Operation and Installation Information
  • There are several components to a breakaway system. The pin should be attached to a metal cable that is plugged into a small switch usually located on the frame near the coupler. I attached an FAQ article that details everything about these systems for you to check out. Typically the battery is enclosed in a case that will have a tester that will tell you the condition of the battery. Check out the Engager Trailer BreakAway Kit # 20099 to see one like this. This one also has a built in charge
    view full answer...


Info for this part was:


Installed by:
Joe V

Photos by:
Jackie C

Video by:
Andrew K

Expert Research:
DeAnne T

Expert Research:
Michael H

Expert Research:
Reno H

Expert Research:
Jameson C

Expert Research:
John H

Video Edited:
Dustin K

Photos by:
Jim W

Expert Research:
Lori W

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