What an electric jack does and why RV owners use one

An electric jack is a motorized lifting device that raises and lowers your RV's front or rear end without you having to crank a manual handle. Instead of turning a hand crank for several minutes, you press a button or flip a switch, and the motor does the work. Most RV owners use them to level the coach side-to-side or front-to-back, which matters because an unlevel RV can cause your refrigerator to work poorly, your cabinets to swing open, and your water to drain unevenly.

Electric jacks come in two main types: leveling jacks that sit at the corners of your RV and lift it off the ground, and stabilizer jacks that lower down but do not lift the full weight. Leveling jacks are the heavier-duty option and are what most people mean when they talk about an electric jack system. They let you adjust your RV's height and angle so the living space is actually level, which takes the strain off your plumbing, appliances, and your own back.

Key Takeaways

  • Electric jacks use a motor and hydraulic or mechanical system to raise and lower your RV instead of requiring manual cranking.
  • Leveling jacks lift your RV off the ground at multiple points, while stabilizer jacks only lower partway and do not carry the full weight.
  • Most electric jack systems are controlled by a switch panel inside the RV, though some newer models use wireless remotes or smartphone apps.
  • Electric jacks require a dedicated 12-volt or 24-volt power supply and draw significant current, so your RV's battery or shore power must be adequate.
  • Manual backup cranks are a standard safety feature so you can lower the jacks if the electrical system fails.

How the motor and hydraulic system work together

When you press the button to raise a jack, electricity flows from your RV's battery or shore power to a small electric motor inside the jack. That motor turns a pump, which pushes hydraulic fluid through a sealed cylinder. The fluid pressure pushes a piston upward, and the piston is connected to the lifting arm or pad that makes contact with the ground. The whole process is sealed and self-contained, so you do not have to add fluid or maintain it the way you would with a manual jack.

To lower the jack, you press the button in the opposite direction. The motor reverses, the pump pulls the hydraulic fluid back out of the cylinder, and the piston retracts. A relief valve inside the jack prevents over-pressurization, which protects the system if you try to lift more weight than the jack is rated for. Most RV electric jacks are rated between 5,000 and 15,000 pounds per jack, depending on the model and manufacturer.

The control panel inside your RV usually has individual buttons for each jack, or a joystick that lets you raise and lower multiple jacks at once. Some newer systems have a level-sensing feature that automatically adjusts each jack to bring your RV to level without you having to watch and adjust manually.

Power requirements and electrical setup

Electric jacks draw a lot of current in a short time, which is why your RV's electrical system has to be sized correctly. Most systems run on either 12-volt DC power (from your house battery) or 24-volt DC power (common on larger Class A motorhomes). A single jack can draw 50 to 150 amps during operation, so if you have four jacks raising at the same time, you could be pulling 400 to 600 amps from your battery bank.

This is why many RV owners run their jacks only when plugged into shore power at a campground, or they upgrade their battery bank to handle the load. If you try to run all four jacks on battery power alone, you can drain your house batteries in minutes and leave yourself without power for lights, water pump, or other essentials. Some RVs have a dedicated isolator or relay that prevents the jacks from running if the battery voltage drops below a safe threshold.

If your RV is plugged into 30-amp or 50-amp shore power, the campground's electrical pedestal supplies the current directly, and your battery is not affected. This is the reason many RV owners wait until they arrive at a campground before leveling — it preserves battery power for the night.

Manual backup and safety features

Every electric jack system includes a manual crank handle as a backup. If your battery dies, your shore power fails, or the motor stops working, you can remove the crank handle from its storage location and fit it onto a socket on each jack. You then turn the handle by hand to lower the jacks so you can move the RV or get it level enough to live in temporarily. The manual crank is slower and harder work than the electric motor, but it means you are never stuck with the jacks up and no way to lower them.

Most jacks also have a pressure relief valve that prevents you from over-lifting. If you accidentally try to raise a jack past its maximum height, the valve opens and stops the pressure from building further, protecting the seals and cylinder from damage. Some systems also have limit switches that automatically stop the motor when a jack reaches its full extension or full retraction.

Common problems and maintenance

The most frequent issue with electric jacks is slow operation or failure to raise on one side. This usually means the hydraulic fluid level is low, air has entered the system, or the motor is weak. Checking the fluid level is straightforward on most jacks — there is a sight glass or dipstick on the cylinder. If the level is low, you top it up with the hydraulic fluid specified in your RV manual, usually ISO 32 or ISO 46 hydraulic oil.

Air in the system causes spongy or uneven lifting. If one jack raises faster than the others, or if the system feels soft when you press the button, you may need to bleed air out. This involves raising and lowering the jacks several times in a specific sequence while watching the fluid level. Some RV owners take this to a dealer, while others do it themselves by following the manual.

Corrosion on the jack pads or cylinders can prevent smooth operation. If a jack sticks or makes grinding sounds, inspect the rod and cylinder for rust or debris. Light surface rust can be cleaned with a wire brush and a light oil. Deep pitting or damage usually means the jack needs replacement.

Choosing between electric and manual jacks

If your RV did not come with electric jacks, you can retrofit them, though the cost and labor are significant. A full set of four electric leveling jacks plus installation typically runs between $3,000 and $8,000, depending on the brand and your RV's size. Manual jacks cost far less upfront but require physical effort every time you level, which adds up over hundreds of camping trips.

Electric jacks make sense if you camp frequently, have mobility limitations, or tow a large trailer where manual leveling is exhausting. They also level faster and more precisely, which reduces the time spent at each campground. Manual jacks are adequate if you camp occasionally, have a small RV, or prefer to keep your system straightforward and avoid electrical complexity.

Some RV owners use a hybrid approach: they keep manual jacks as their primary system and add electric jacks only at the corners that need the most adjustment. This spreads the cost and still saves significant effort.

Frequently Asked Questions

Can I run my electric jacks on battery power alone?

Technically yes, but it drains your house battery very quickly. A full set of four jacks can pull 400 to 600 amps and empty a typical RV battery bank in minutes. Most RV owners run jacks only when plugged into shore power, or they upgrade to a much larger battery bank if they camp off-grid regularly.

What should I do if one jack raises slower than the others?

Check the hydraulic fluid level first — low fluid is the most common cause. If the level is full, air may be trapped in the system. Raise and lower the jacks several times in sequence to bleed out air bubbles. If the problem persists, the motor or pump in that jack may be failing and need replacement.

Do I need to winterize my electric jacks?

If you store your RV in freezing temperatures, lower the jacks completely so they are not extended and exposed to ice and snow. The hydraulic fluid itself does not freeze in typical RV climates, but ice buildup on the rods can prevent smooth operation. Store the manual crank handle indoors so it does not get lost.

What happens if the motor burns out?

You can still lower the jacks using the manual crank handle. Once lowered, you can drive the RV to a service center for motor replacement. The motor is a replaceable part, and most dealers stock them. Repair cost varies but is usually between $500 and $1,500 per jack depending on the brand.

Can I add electric jacks to an RV that only has manual jacks?

Yes, but it requires drilling holes in your frame, running hydraulic lines, installing a control panel, and wiring the system to your battery or shore power. The work is labor-intensive and typically costs $3,000 to $8,000 for a full four-corner system. Many RV owners choose this upgrade when they plan to keep their RV long-term or have physical limitations that make manual leveling difficult.