What is the Recommended Breakaway Battery Size for a Single Axle Trailer

Question

Question:

I have a single axle trailer max weight 3600 lbs. How big of a battery will I need just for the breakaway switch?

asked by: Tim

1

Helpful Expert Reply:

The standard battery size for a breakaway system is 5 amp hours. I recommend the Hopkins Engager Push-To-Test Trailer Breakaway Kit with Built-In Battery Charger part # 20400 which is a complete kit that has everything you need. It also have a cool feature where you can simply press a button to see if your battery is charged and ready to go. It comes with the battery, switch, and mounting box.

expert reply by: Conner L

1

Answer 1

Yes, I contacted our representative at Hopkins and he informed me that the replacement box that you will need is the Engager Trailer Breakaway Kit part #HM20120. Part #HM20120 also includes a lid, but is interchangeable with the LED lid that you…

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Answer 2

I spoke with Hopkins about the yellow light on the Hopkins Engager Push-To-Test Trailer Breakaway Kit part #20400 staying on while the trailer is disconnected and they stated this was likely due to an on-board battery on the trailer sending power to…

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Answer 3

There is two possible causes making the light on your Hopkins Engager Push-To-Test Trailer Breakaway Kit w/ Built-In Charger - Side Load - 7" Wire #20099 to stay on even when the trailer is disconnected. The first is if you have the #20099 wired…

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Answer 4

If you pulled the pin on a breakaway kit, like the Hopkins Engager Push-To-Test Trailer Breakaway Kit #20099, you should be able to just insert the pin back into place and your breakaway battery will stop applying the brakes on your trailer. If you…

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Answer 5

If you found a broken solder joint and disconnected wire inside your trailer breakaway battery box like #20099 and you are sure of where the loose wire connects, then yes, you should be fine soldering the wire back into place on the circuit board.…

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Answer 6

The TAP breakaway system is actually the same as the Hopkins Engager Push-To-Test Trailer Breakaway Kit with Built-In Battery Charger part #20400. You can use the Replacement Switch for Curt Soft Trac I and II Trailer Breakaway Kits part #C52010 with…

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Answer 7

We have numerous battery boxes, see link below, some are smaller than the battery size you have and some are larger. The box you end up with will most likely have at least one physical dimension that is much larger than the same dimension on the…

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Answer 8

If you are using a breakaway kit like the Hopkins Engager Trailer BreakAway Kit #20099 or #20400 that features a sealed battery in an enclosure then you can mount it sideways if that is a better mounting solution on your trailer. We often see…

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Answer 9

Yes, both Hopkins trailer breakaway kits you referenced, parts #20099 and #20400, are complete and equivalent breakaway kits that differ only in the manner that they mount to the trailer. Part #20099 mounts on the side of the trailer frame while part…

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Answer 10

If you already have a breakaway switch and trying to find its power source, It is possible that someone could have wired the breakaway switch directly to the main battery on the trailer but it does not come like that from the factory. The breakaway…

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Answer 11

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 12

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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