How to Prevent Trailer Dump Battery Overcharging From Truck Battery
Question:
dump trailer battery charging from tow vehicle-what can be in line of 12 volt line from truck to trailer charging line to prevent over draw from truck and blowing fuse.
asked by: Todd S
Expert Reply:
The 12-volt accessory power circuit from your 7-way trailer connector is limited in how much power it can deliver to your dump trailer's battery by the alternator's output and the small gauge wire that's typically used to power the circuit as well as the distance that the power must travel.
The accessory circuit can be used to maintain a charged battery, but it does not have enough grunt to charge the battery once it's been discharged. Using shore power and a battery charger like the CTEK # CTEK56353 is the best method of recharging the battery.
The 12 volt accessory circuit on some vehicles is active even when the truck ignition is shut off. In that situation, a power draw from the trailer could conceivably drain the battery on the truck to the point where it can't start the truck. To prevent this, a battery isolation solenoid like part # PK5231201 can be installed. I've linked you to a video showing the solenoid being installed.
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
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Product Page this Question was Asked From
Starter Solenoid - SPST - 12 Volt - 100 Amp - Continuous Duty - Grounded
- Accessories and Parts
- Battery Boxes
- Switches and Solenoids
- 100 Amp
- Pollak
more information >
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