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Discussion Starter #1
Sorry if this has been covered. Does the plug at the back of TH has charging ability for the deep cycle batteries of a camper while driving the car? Thanks

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Sorry if this has been covered. Does the plug at the back of TH has charging ability for the deep cycle batteries of a camper while driving the car? Thanks

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The outlets are rated at 13 Amps. How many batteries do you need to charge ? What is the size of the batteries ? Are you charging direct with 12V or are you supplying power to an inverter in the camper ? How discharged could the camper batteries be when you hook them up to the Jeep's power, meaning are you simply float charging or doing heavier bulk charging ?
 

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The outlets are rated at 13 Amps. How many batteries do you need to charge ? What is the size of the batteries ? Are you charging direct with 12V or are you supplying power to an inverter in the camper ? How discharged could the camper batteries be when you hook them up to the Jeep's power, meaning are you simply float charging or doing heavier bulk charging ?


Hey mark, the OP is referring to the trailer hitch plug. Here in the US that plug provides a charge line for the trailer batteries.

To the OP, that plug can/will provide up to the fuse limit of 30amps. Unless you have a HUGE battery bank on the trailer which I feel is unlikely you shouldn't have a problem. This is of course only if you have the factory installed tow package.


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Hey mark, the OP is referring to the trailer hitch plug. Here in the US that plug provides a charge line for the trailer batteries.

To the OP, that plug can/will provide up to the fuse limit of 30amps. Unless you have a HUGE battery bank on the trailer which I feel is unlikely you shouldn't have a problem. This is of course only if you have the factory installed tow package.


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Ah, right. Thanks for clarifying. I think Teo is in Canada but the trailer electricals are likely the same.
Not sure how much Teo knows as far as the basics go. Guess we'll find out soon ;)
 

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Discussion Starter #5
Do not have a camper yet. I am thinking a getting a teardrop in a year, If I find a good one in Ontario. I will be traveling in Canada. So I wanted to charge the camper battery, possible one, on the road. All I wanted know the charging amp going through the plug into the camper battery. That would give me an idea. Thanks for your reply!

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.... I wanted to charge the camper battery, possible one, on the road.
A few thoughts on this:

- Since your first post mentioned "deep cycle batteries", and your post quoted above mentions "possible one", it might be helpful to mention that often times deep cycle batteries are 6-volt. While there are 12-volt deep cycle batteries, the 6-volt are more plentiful (e.g. golf cart batteries). To be compatible with the car's 12 volt system, the 6-volt batteries are set up in pairs wired in series to produce 12 volts.

- The battery pin in the KL's 7-pin connector is at 11 o'clock and the ground pin is at 4 o'clock. The owner's manual diagram is misleading. But no problem because the schematic for the pins is stamped right on the connector's cover. The nice thing is the battery pin is switched; meaning it is live only when the ignition is on. Don't have to worry about the camper battery being drawn down into the vehicle's battery when the ignition is turned off. (FWIW, the 4-pin connectors do not include a 12V battery pin by standard.)

- The other nice thing about the battery pin for charging your camper batteries is the car's alternator and voltage regulation system ensures your camper batteries are getting an appropriate charge and not being overcharged.

- Choose the correct gauge wire when running a cable from the car's connector to the battery bank. For example, if the wire run is 7 feet long an appropriate gauge for carrying 30 amps is 14 AWG - http://www.offroaders.com/technical/12-volt-wiring-tech-gauge-to-amps/.

- While the KL's end is fused, it would be a good idea to have a 30 amp fuse at the camper's battery bank too (cheap insurance).
 
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A few thoughts on this:



- Since your first post mentioned "deep cycle batteries", and your post quoted above mentions "possible one", it might be helpful to mention that often times deep cycle batteries are 6-volt. While there are 12-volt deep cycle batteries, the 6-volt are more plentiful (e.g. golf cart batteries). To be compatible with the car's 12 volt system, the 6-volt batteries are set up in pairs wired in series to produce 12 volts.



- The battery pin in the KL's 7-pin connector is at 11 o'clock and the ground pin is at 4 o'clock. The owner's manual diagram is misleading. But no problem because the schematic for the pins is stamped right on the connector's cover. The nice thing is the battery pin is switched; meaning it is live only when the ignition is on. Don't have to worry about the camper battery being drawn down into the vehicle's battery when the ignition is turned off. (FWIW, the 4-pin connectors do not include a 12V battery pin by standard.)



- The other nice thing about the battery pin for charging your camper batteries is the car's alternator and voltage regulation system ensures your camper batteries are getting an appropriate charge and not being overcharged.



- Choose the correct gauge wire when running a cable from the car's connector to the battery bank. For example, if the wire run is 7 feet long an appropriate gauge for carrying 30 amps is 14 AWG - http://www.offroaders.com/technical/12-volt-wiring-tech-gauge-to-amps/.



- While the KL's end is fused, it would be a good idea to have a 30 amp fuse at the camper's battery bank too (cheap insurance).


Any group 24, 27 or 31 is going to be considered a deep cycle battery. The group 24 and 27 are what are used in id say 95% of all towable travel trailers. All are fused at the converter as the travel trailer should be wired so that the power from the plug goes to the converter and the battery. But the battery has a direct connection to the plug for legal reason due to the emergency brake away switch for the trailer brakes.

The trailer the OP is going to be looking at will come with everything he needs unless he upgrades the battery which is simply just drop right into place. For most applications it will do the OP just fine.

In my application I actually bypassed the charge line on the 7 way plug and I use the rear winch hookup for a large 4 gauge connection to the batteries in my trailer. But I have two group 31 100ah agm batteries and when they are dead the Cherokee can't charge them without blowing the fuse. The rear winch allows me to provide far more power to the trailer to charge the batteries or in an emergency (for search and rescue or storm chasing) I can back feed the power from the trailer batteries into the Cherokee.


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@Array ;

Having seen backup systems using large 6V batteries, I know where you're coming from. You're taking big power storage here. I did a *small* emergency power setup a few years ago for someone who needed 30 Amps @120V for 2 hours. I got them two 100lbs+ 6V wet deep cycle batteries. Though I'm sure Teo would love to have that power (lol), like Len said he's going for the recreational deep cycle stuff with the trailer, which is typically one 50-60lbs 12V deep cycle battery.

Len : we gotta set you up with a 10kW generator on the roof of that TH :grin:
 
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@Array ;

Having seen backup systems using large 6V batteries, I know where you're coming from. You're taking big power storage here. I did a *small* emergency power setup a few years ago for someone who needed 30 Amps @120V for 2 hours. I got them two 100lbs+ 6V wet deep cycle batteries. Though I'm sure Teo would love to have that power (lol), like Len said he's going for the recreational deep cycle stuff wiht the trailer, which is typically one 50-60lbs 12V deep cycle battery.

Len : we gotta set you up with a 10K Watt generator on the roof of that TH :grin:


Don't think I haven't considered mounting a 4-5k generator on the roof. Seriously.

My batteries each weigh in at nearly 100lbs a piece. But I can run my entire trailer on battery power for at least a week probably longer since the only big power draw I have is my furnace. Even my lights is led.




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Any group 24, 27 or 31 is going to be considered a deep cycle battery. The group 24 and 27 are what are used in id say 95% of all towable travel trailers.
Out of my wheelhouse with towable travel trailers. My motorhome had four 12-volt deep cycle house batteries. When it came time to replace them I was shocked at the cost for those suckers. Replaced them instead with four Costco 6-volt golf cart batteries at $80 each that had almost the same AH rating. Will say though they do not do well cranking the 10K diesel generator. Sometimes have to start the engine first to get the generator started. Not a big deal for all the bucks I saved though.
 

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Out of my wheelhouse with towable travel trailers. My motorhome had four 12-volt deep cycle house batteries. When it came time to replace them I was shocked at the cost for those suckers. Replaced them instead with four Costco 6-volt golf cart batteries at $80 each that had almost the same AH rating. Will say though they do not do well cranking the 10K diesel generator. Sometimes have to start the engine first to get the generator started. Not a big deal for all the bucks I saved though.


Yea, deep cycle batteries typically don't do well starting engines. Newer batteries like the yellow top optima or batteries like mine do really well as dual purpose batteries. But you pay a small fortune for them. If I had the room I likely would have gone 6v myself but due to weight restrictions I went this route.


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.... The nice thing is the battery pin is switched; meaning it is live only when the ignition is on. Don't have to worry about the camper battery being drawn down into the vehicle's battery when the ignition is turned off.
Dang, I'm wrong on this.

Saw another post where @Len1304 stated, "I can confirm the charge line is hot at all times." So I went out with a voltmeter to check and he is correct. This is on a 2015 North American factory installed Trailer Tow Group. The brake lights also work with the ignition off (e.g. the emergency flashers work through to the trailer lights when the ignition is off).
 
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