Recommendation for Using a 7-Way Trailer Connector to Charge a Trailer Battery
Question:
I am wanting to put an auxiliary battery on a fuel trailer to run a fuel pump. I would like to be able to maintain the battery by using my current 7 way RV plug on my pickup truck. Also if needed a small 110 tickle charger to charge the battery when the trailer is sitting still. Is it possible to charge the battery from a 7 way RV plug and what components would I need.
asked by: Matt
Expert Reply:
The 12 Volt auxiliary terminal on your 7-way connector can be used to keep the battery on your trailer charged.
You will need to run a 10 gauge power wire like # 10-1-1 from the 12 volt auxiliary terminal on the 7-Way trailer connector on the trailer to the positive terminal on the trailer battery and ground the negative terminal of the trailer battery to the trailer frame. This will allow you to maintain a charge on your trailer battery, it will not charge the battery from a discharged state.
To be able to fully charge the trailer battery from a discharged state you would have to use the CTEK Multi US 7002 12-Volt Universal Battery Charger, part # CTEK56353. This charger can be used to fully charge the battery and then you can maintain that charge with the vehicles charging system.
I am attaching a link to the instructions on the CTEK battery charger.
Products Referenced in This Question
CTEK MULTI US 7002 12-Volt Universal Battery Charger w/ Pulse Maintenance and Backup Power
- Battery Charger
- Battery Charger
- Car/Truck/SUV
- Motorcycle
- Trailer
- Lawn Mower
- Jet Ski
- 150 Ah
- Charges/Maintains
- 12V
- Wall Outlet to Vehicle Battery
- CTEK Power Inc
more information >
Product Page this Question was Asked From
Adapter 4-Pole to 7-Pole and 4-Pole
- Trailer Wiring
- Wiring Adapters
- Multi-Function Adapter
- 4 Flat
- Plug and Lead
- 4 Flat
- 7 Round - Blade
- Hopkins
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: AxleTek Brake Assembly Recommendation for 8k Axles with 4 Bolt Mounting Pattern
- Article: Trailer Wiring Diagrams
- Q&A: Installing a Brake Controller and a 7-Way Trailer Connector on a 2005 Ford F-150 With Factory 4-Way
- Q&A: How to Add Tension to Solera Slide-Topper
- Q&A: Slide Topper Recommendation for Box Width of 90.5 Inches on Gulf Stream Vintage 23BHS
- Q&A: Replacement 7-Way Wiring Harness for 2005 Ford F-150 with Factory Tow Package
- Article: How to Choose the Right Trailer Hitch Class
- Article: Trailer Tire Sizing
- Q&A: What is the Fuse Rating and Power Wire Gauge Used for Trailer Wiring Harness # 118571
- Q&A: Which Bolt Locking Hitch Pin Can be Keyed to a 2014 GMC Sierra 1500
- Article: Brake Controller Installation: Starting from Scratch
- Article: Best Bike Racks for Electric Bikes
- Article: RV Propane Troubleshooting | Common Propane Issues and How to Solve Them