How Does The Etrailer Hydraulic Jack Get 12v Power? From Truck Or Trailer?
Updated 11/18/2025 | Published 11/15/2025
Question:
What is this jack powered by? Is it powered by the tow vehicle/truck electric power or by a external power supply? My trailer is a 2022 BigTex 20foot 14TL equipment tilt trailer
asked by: Roland
Expert Reply:
Hey Roland, the Self-Contained Hydraulic Jack - Square Tube - Bolt On - 12,000 lbs # e33VV connects to a battery on your trailer. It wouldn't be good to run it to the 7 way on the back of truck but you could wire the 7 way to charge a battery mounted on the trailer, which is what I do on my car hauler trailer.
Do you already have a battery mounted on the trailer? If not, you can grab a standard 12v marine battery, nothing fancy.
Product Page this Question was Asked From
etrailer Self-Contained Hydraulic Trailer Jack - 24-1/4" Lift - 12,000 lbs - Bolt On
- Trailer Jack
- Car Hauler
- Dump Trailer
- Enclosed Trailer
- Side-Mount Jacks
- 10001 lbs or More
- Hydraulic Jack
- 24-1/4 Inch Lift
- Bolt-On
- With Rectangle Foot
- etrailer
more information >
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Roland
11/18/2025
Thanks for answering. That was the thought I had to power the etrailer jack. I was thinking it had a battery system contained in with the hydraulic system which would make it a really self contained powered torque jack. But it's still a great idea. Thank you.