Battery tender hookup to 7pin hitch plug

[In3briatedPanda]

I stumbled across this post on reddit last night and ive never seen or heard about this.



This user plugs a battery tender into his hitch plug. maybe it would benefit some members here if it works.

Can someone explain this to me? Ive thought about it a few times and i cant make it make sense. Im unsure how a charge current goes though the hitch plug to charge a battery. i would not expect the wiring to be able to handle that load.

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[ChrisNLA]

I stumbled across this post on reddit last night and ive never seen or heard about this.



This user plugs a battery tender into his hitch plug. maybe it would benefit some members here if it works.

Can someone explain this to me? Ive thought about it a few times and i cant make it make sense. Im unsure how a charge current goes though the hitch plug to charge a battery. i would not expect the wiring to be able to handle that load.

It does work. A few people here do that.

It's just a wire from the 7 pin connector to battery hot with a 30A fuse I believe.

You don't get crazy and fast charge 30 amps through it, lol. Folks are using trickle chargers / low amp chargers through that plug.

 

[Larry-D]

Using this on the Gladiator since 2021 and a Grand Cherokee diesel from 2018. No problems. Don't have the GC anymore (HPFP failure and rear main seal leak) and the Gladiator is still on the original batteries. If its in the garage, its plugged in.

Bonus is that the 7-pin outlet gives you a 12vdc power port at the rear bumper which is always powered.

 

[daveola210]

Been doing this for a while on the Jeep and my truck. If its going to sit for a few days I plug in the trickle charger and put in the plug. Keeps them fully charged. 2021 Mojave, still on both original batteries.

Plug - Amazon.com: WOFTD 7 Pin Trailer Plug with Waterproof Seal 7 Point Trailer Wiring Replacement Plug Adapter 7 Way Round RV-Style Trailer Side Connector : Automotive

Extension - Amazon.com: ELFCULB 16AWG 20FT SAE Extension Cable 3/6/10/20/35/50FT Quick Disconnect Wire Harness with SAE Connector for Automotive RV Battery Solar Panel : Patio, Lawn & Garden

 

[JTdiRtyD]

Related but unrelated, is there a simple way to make the +12 in the trailer plug ACC switched? Like a simple fuse swap? ( I know some vehicles have that).

I'd like to use it as an ACC trigger for a DC-DC charger on my trailer. If theres no factory way to make it switched I'll run it through a switched relay.

 

[MaximusTX]

I stumbled across this post on reddit last night and ive never seen or heard about this.



This user plugs a battery tender into his hitch plug. maybe it would benefit some members here if it works.

Can someone explain this to me? Ive thought about it a few times and i cant make it make sense. Im unsure how a charge current goes though the hitch plug to charge a battery. i would not expect the wiring to be able to handle that load.

There is a whole thread on this.

Battery Tender hookup

 

[AOGAudiman]

I stumbled across this post on reddit last night and ive never seen or heard about this.



This user plugs a battery tender into his hitch plug. maybe it would benefit some members here if it works.

Can someone explain this to me? Ive thought about it a few times and i cant make it make sense. Im unsure how a charge current goes though the hitch plug to charge a battery. i would not expect the wiring to be able to handle that load.

I travel a lot for work, often gone for long durations. I have been using these with great success:

https://www.amazon.com/dp/B002UC8U7G?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1
https://www.amazon.com/dp/B07W46BX31?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_13&th=1

https://www.amazon.com/dp/B004LWWNI0?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_13

 

[Chaos Theory]

It does work. A few people here do that.

It's just a wire from the 7 pin connector to battery hot with a 30A fuse I believe.

You don't get crazy and fast charge 30 amps through it, lol. Folks are using trickle chargers / low amp chargers through that plug.

I do it and it works great. My Jeep sits for sometimes weeks as I use a better MPG vehicle as my DD. Keeps the battery topped.

 

[danimal2000]

Got these delivered 11 days ago. Works well for my situation. Been too cold last few days but garage will be heated next year (charger says don't use below -4F, i don't want to risk it)

ELFCULB 7 Way Trailer Plug to SAE... https://www.amazon.com/dp/B0D1R1CQF1?ref=ppx_pop_mob_ap_share

NOCO GENIUS2: 2A 6V/12V Smart... https://www.amazon.com/dp/B07W6B987F?ref=ppx_pop_mob_ap_share

NOCO GC009 X-Connect SAE Adapter... https://www.amazon.com/dp/B005DUMADC?ref=ppx_pop_mob_ap_share


Be certain the polarity is correct!

 

[In3briatedPanda]

There is a whole thread on this.

Battery Tender hookup

I travel a lot for work, often gone for long durations. I have been using these with great success:

https://www.amazon.com/dp/B002UC8U7G?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1
https://www.amazon.com/dp/B07W46BX31?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_13&th=1

https://www.amazon.com/dp/B004LWWNI0?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_13

i use the the same one. my dumbass is thinking the truck is under load, im just stupid. the search bar is not my friend today for this site either. i thought i scavenged enough until maximus posted the 4 page battery tender thread.

 

[Lunentucker]

I considered do it, but I always enter the truck from the front and back out of the garage, so the likelihood of forgetting it's plugged in and tearing something up is relatively high.

 

[AOGAudiman]

I considered do it, but I always enter the truck from the front and back out of the garage, so the likelihood of forgetting it's plugged in and tearing something up is relatively high.

Heard that! I made a little laminated sign that I put on the front of the instrument cluster for when I plug in my block heater. It's worked so far....LOL

 

[Jbodine]

Found the idea here on the forum and using these with an old Optimate? charger. Helped my old batteries limp along a little longer and now hopefully extending life on the newer ones. 2022 Rubicon.

https://www.amazon.com/dp/B0CMDJRBDB?psc=1

https://www.amazon.com/dp/B091T3CSHC?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1

 

[NotSo Bright White]

I considered do it, but I always enter the truck from the front and back out of the garage, so the likelihood of forgetting it's plugged in and tearing something up is relatively high.

I have my cord dangling over my front tire and yes, I have driven off more than once with it plugged in. It will not damage anything until you are one month pass the warranty on the battery tender. Then you will need to purchase a new one like I did this week.

 

[TARHEELKIDD]

Been doing this for a while on the Jeep and my truck. If its going to sit for a few days I plug in the trickle charger and put in the plug. Keeps them fully charged. 2021 Mojave, still on both original batteries.

Which charger/maintainer are you using?

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