Cybertruck Underglow: App-Controlled RGBW Kits

A stock Cybertruck already stops traffic. Add Cybertruck underglow, with color chasing down both sides and pooling at the bumpers, and the question in the parking lot changes. People stop asking what that truck is and start asking what kit is on it.

XKGLOW built that kit for this truck. The XKmax Cybertruck underglow kit (SKU MX-CAR-CT) is an app-controlled RGBW kit made for the Cybertruck's 48V electrical system, and it ships with the voltage converter that system needs. You run it from the XKmax app or an RF key fob, and it lists at $1,299.99.

Cybertruck Underglow Starts With the 48V System

Tesla's owner's manual describes a 48V low-voltage system with two power feeds for accessories, one on the roof and one in the powered frunk. Each feed allows 400 watts at most and runs at 44 to 50 volts nominal.

Tesla calls the two feeds the only points where you can connect accessories directly to the low-voltage system. It warns that tapping any other low-voltage wiring can lead to unpredictable results, such as a total loss of power steering.

The kit's controller runs on 12V, so a 48V to 12V converter ships in the box. XKGLOW's instruction sheet rates the whole kit at 200 watts, half of what a power feed allows.

What the XKGLOW Cybertruck Underglow Kit Includes

XKGLOW unveiled its Cybertruck-specific lights, underbody lighting included, at the 2024 SEMA Show. The MX-CAR-CT listing and instruction sheet give you this:

The sheet's layout diagram labels 18-inch tubes at the front, 48-inch and 42-inch tubes down each side, and 12-inch and 24-inch tubes across the rear. A bracket slides into the channel on the underside of each tube and locks with a set screw, and joint brackets join tubes together. The side tubes bolt to the factory holes under the truck with M8 bolts, and solder seal connectors join the converter wires.

The controller has four channels: the kit uses two, one per side, and the sheet marks the other two optional.

Controlling the Glow: XKmax App and Key Fob

The XKmax app connects over Bluetooth and holds 28 or more chasing themes, each with editable colors, patterns, speed, and brightness. A DIY builder lets you design your own. Sync modes tie the effect to music, vehicle speed, or acceleration, and you can set a custom startup mode. The kit also supports firmware updates.

The RF key fob has four buttons you can program for quick access. A push button on the switch wire turns the controller on, and QR codes on the instruction sheet's last page cover the XKmax app and the MX-CAR-CT kit preset.

What It Does Not Do on a Cybertruck

XKGLOW's page flags one limit: the sensor wires for brake and turn signal control are not compatible with the Cybertruck. The wiring diagram agrees and says sensor wires cannot be used with 48V. On a Cybertruck you get themes, music sync, and speed sync, but no brake or turn signal sync.

Installing Cybertruck Underglow: What the 3 to 4 Hours Covers

XKGLOW's instruction sheet runs in this order:

1. Open the frunk and pull its trim and tray to reach the front power feed. The sheet names red as positive 48V and brown as negative, and tells you to check Tesla's owner's manual for the wire colors first.
2. Wire the converter between the power feed and the XKmax controller, then switch the feed on from the touchscreen under Outlets and Mods.
3. Test every tube before you mount any of them.
4. Mount the converter behind the frunk tray and the controller in the frunk, with the power feed switched off.
5. Bracket the tubes on: front under the bumper, sides on the factory holes, rear at the bumper. Keep the front tubes from overhanging, because they could hit the tires while turning.
6. Pull the fender flares to route the wires, unplug the cameras on the front flares, then reinstall everything and pair your phone to the controller.

Before you start, check your truck's wires against Tesla's manual. Tesla says the power feeds may look or operate differently depending on date of manufacture, vehicle configuration, or market region, and to schedule service if the wires do not match its description.

Warranty, Tesla's Rules, and Who Should Install It

Check the product page for the kit's warranty terms when you order. XKGLOW's warranty page says the term listed for an individual product takes precedence over its general policy. The same page offers free lifetime support after any warranty expires.

The instruction sheet recommends a licensed professional for the install. Its warranty text says installation must be performed by one, and that damage from improper installation voids the warranty.

XKGLOW describes the tubes as impact-resistant, but its warranty page excludes physical damage, including impacts or collisions, along with deep water submersion and high-speed debris impact.

Tesla's owner's manual says only knowledgeable and experienced individuals should tap the power feeds, and that damage from non-approved parts or modifications is not covered by Tesla's warranty. Treat this as a shop job, and start with XKGLOW's dealer locator, which the product page links under Find an Expert.

Cybertruck Kit or Universal XKmax Underglow?

XKGLOW's universal XKmax underglow kit uses a 12V controller, and its listing describes a universal fit without mentioning the Cybertruck. The two kits differ where it counts on this truck:

XKGLOW also sells a stand-alone 48V to 12V converter for $69.99 and lists Cybertrucks among its uses, but the universal underglow page does not name the Cybertruck. Ask XKGLOW support before you pair them.

On a 12V car or truck, that universal kit is the right pick. On a Cybertruck, buy the kit XKGLOW built for it.

What This Means for Your Cybertruck

Three things settle this order:

• Who installs it: the job touches a 48V system and XKGLOW's instruction sheet calls for a licensed professional, so budget for a shop.
• Where the light goes: MX-CAR-CT lights the ground. To trace the body lines instead, Cybertruck accent lighting is the other route.
• What you give up: brake and turn signal sync, which this kit does not support.

Either route is one layer in a complete Cybertruck lighting upgrade. Build yours today.

Frequently Asked Questions

Can you put underglow on a Cybertruck?

Yes. XKGLOW sells a Cybertruck-specific kit, MX-CAR-CT, with the 48V converter included. It connects to the frunk power feed that Tesla documents for accessories. Tesla also says damage from non-approved parts or modifications is not covered by its warranty, so have a professional install it.

Will underglow drain a Cybertruck's battery?

Only while it is powered. XKGLOW lists the kit at 200 watts maximum, or 0.2 kilowatt-hours for an hour at full draw. Tesla says power feeds shut off by default when you exit and close the doors, and that leaving an accessory powered depletes the high voltage battery.

Is installing underglow on a Cybertruck hard?

It is not a beginner job. XKGLOW lists 3 to 4 hours and recommends a licensed professional. The work includes pulling the frunk trim, wiring a 48V converter, and unplugging the front cameras to remove the fender flares. Tesla says only experienced people should tap the power feeds.

How much does Cybertruck underglow cost?

XKGLOW's Cybertruck kit lists at $1,299.99 with the converter and key fob included. Its universal XKmax Underbody Kit lists at $341.99 but runs a 12V controller and has no Cybertruck layout. A shop's install labor is extra, and XKGLOW lists the job at 3 to 4 hours.

Is Cybertruck underglow legal?

It depends on your state's lighting laws. Most states prohibit flashing lights on non-emergency vehicles, and off-color underbody lights generally are not allowed on public roads. A private car show is the safe place for color and chase effects. Check your state's rules before you drive with the lights on.