How to Power Aftermarket Lights on a Cybertruck's 48V System

Every light you add to a Cybertruck draws from one of two places. Tesla builds a 48V power feed into the roof and another into the frunk, and each one tops out at 400 watts. Plan your Cybertruck 48V accessories around those two numbers and the rest of the build falls into place.

XKGLOW builds its Cybertruck line for that system. The roof light bar takes 48V directly, the underglow kit ships with its own converter, and the XKcommand panel switches 12V gear from the frunk feed.

Why the Cybertruck Needs Its Own Power Plan

Many conventional vehicles carry a 12V lead-acid battery. Tesla's manual says the Cybertruck uses a 48V lithium-ion low voltage battery instead. That battery also serves as a redundant power source for critical systems, power steering among them.

Tesla names exactly two points for connecting accessories directly to that low voltage system: its two power feeds. It colors 48V connectors blue and marks 48V wires with blue tape, so you can see what you are working near. Our guide to common Cybertruck headlight mistakes answers the 12V versus 48V question in short.

Step 1: Learn What Each 48V Feed Delivers

Tesla's specs fit on a sticky note. Per feed, the ceiling is 400 watts, at a nominal 44 to 50 volts. The full range stretches from a 28V minimum to a 58V maximum, so treat 48V as the nominal figure.

Each feed carries three wires:

• Red with a blue stripe: positive, 48V.
• Black with a blue stripe (roof) or brown with a blue stripe (frunk): ground.
• Green: access to Tesla's Local Interconnect Network (LIN). XKGLOW's instruction sheets connect only the positive and ground wires.

Two cautions come with the feeds. Tesla warns against connecting a power source, such as a solar panel or an external battery, to a feed. And each feed stops providing power when current exceeds its rating.

Step 2: Sort Your Lights by Input Voltage

Every light falls into one of three groups, and the input voltage on its spec line tells you which:

1. Native 48V. XKGLOW's roof light bar lists a 48V input with no converter required, and its manual connects it to the roof feed.
2. Converter in the box. The Cybertruck underglow kit ships with a 48V-to-12V converter, and its instruction sheet rates the whole kit at 200 watts.
3. 12V or 24V gear on its own. Anything with a 12V or 24V input needs a step-down converter between it and the feed.

For that third group, XKGLOW sells the stand-alone 48V to 12/24V Voltage Converter. It comes as a 12V 30A model (MX-VOLT-CVT12) or a 24V 15A model (MX-VOLT-CVT24), each listed at $69.99 at the time of writing. XKGLOW rates it at up to 95% efficiency, inside an IP67 waterproof, shockproof aluminum shell. The box holds the converter alone, and the page links no wiring sheet, so plan the connections with your installer.

Step 3: Budget Watts One Feed at a Time

Watts decide whether a feed keeps running. Add up the listed maximum of everything on a feed and keep the total under 400.

The converter math takes ten seconds. The 12V model at 30A delivers 360 watts, and the 24V model at 15A lands on the same 360. At up to 95% efficiency, a fully loaded converter pulls roughly 380 watts or more from the feed. Run one near its rating and it needs most of a feed to itself.

Now map your XKGLOW kits to the feed each manual uses:

The frunk row is the one to watch. XKGLOW's underglow and XKcommand sheets both start at the frunk's power port. Run both and they share one 400-watt feed, so size the panel's lights to fit what the underglow leaves.

Step 4: Switch and Protect 12V Lights With XKcommand

A converter hands you 12V and nothing else. Switching, protection, and per-light control come from the XKcommand Switch Panel for Cybertruck (SKU XK-CMD-KIT-CT), listed at $527.99 at the time of writing. XKGLOW tailors it to the truck's 48V system and includes a 48V-to-12V converter.

The kit pairs a hub with a button controller. XKGLOW's manual puts the hub on or near the power source, which on this truck means the frunk feed. Here is what it adds over a bare converter:

• Eight 15A channels. The manual caps each channel at 15A. For a light bar that needs 30A, run wires from two channels to the bar and check both channels for that button in the app.
• A resettable fuse per channel. In the XKcommand app, you set each channel's max output current close to its load. Reach that value and the channel cuts off, and its button shows a warning color.
• Programmable buttons. Give each one an icon, an image, or text. One button can also drive several channels, such as every rear-facing light you add.
• Dual control. The panel and the Bluetooth XKcommand app work in sync. Per the manual, XKcommand pairs only with the XKcommand app, so leave XKGLOW's other apps out of this one.
• Waterproof build. It carries an IP67 rating, and XKGLOW lists the install at under an hour.

XKGLOW's page pitches the panel for light bars and cube lights. Keep Step 3 in mind as you pick them. Eight 15A channels at 12V add up to far more than one 400-watt feed can supply, so the power budget is your real limit.

One more Cybertruck rule: the wiring diagram marks the panel's sensor and ignition wires for 12V only and tells you to leave them unused.

Step 5: Wire It, Switch the Feed On, and Test

Start with the truck powered off. Tesla says to assume the low voltage components are always energized. Because 48V runs higher than a typical low voltage system, Tesla warns that improper handling raises the risk of injury, arcing, or component damage.

At the frunk, the feed sits behind the frunk lining, which has to come out first. Tesla's steps include unplugging the emergency interior release connector and torquing the bolts back to 12 Nm. XKGLOW's sheets tell you to confirm the wire colors against Tesla's owner's manual before you connect anything.

The XKcommand manual adds two rules of its own:

1. Connect the hub's red power wire last, after every output channel is wired.
2. Match power and ground exactly. The manual warns that reversed wires will short the hub.

Then switch it on. Touch Controls (on some trucks, Controls > Outlets & Mods) and touch the feed you used. XKGLOW's roof bar and underglow manuals both say to test the lights before you mount them. If a feed cuts out later, Tesla's reset sits under Controls > Outlets & Mods > Reset, or Controls > Reset on trucks without power outlets.

Two behaviors are worth knowing. Out of the box, the feeds cut power once you leave and shut the doors, unless you touch Keep Outlets On. A feed also shuts off when the high voltage battery's capacity runs very low.

Decide who does the work before you start. Tesla says only knowledgeable and experienced individuals should tap the feeds. XKGLOW's XKcommand manual says installation must be performed by a licensed professional, and its product page links XKGLOW's dealer locator under Get Install Help.

Build the Power Plan Before the Light Plan

Two feeds at 400 watts each make the whole map. The 48V roof bar takes the roof feed. The underglow and the XKcommand panel share the frunk feed, sized to fit together. The stand-alone converter handles 12V or 24V gear that arrives without one, on a feed with room to carry it. For the full lineup, see the Cybertruck lighting upgrade guide. Build yours today.

Frequently Asked Questions

Does a Cybertruck have a 12 volt battery?

No. Tesla's manual says the Cybertruck uses a 48V lithium-ion low voltage battery instead of the 12V lead-acid battery found in many conventional vehicles. It also backs up critical systems such as power steering. Tesla marks the truck's 48V wires with blue tape and colors its 48V connectors blue.

Is there a 12V outlet in a Cybertruck?

Not one that Tesla's outlet pages list. Its outlet pages cover USB ports in the cabin and, on equipped trucks, 120V outlets in the cabin plus 120V and 240V outlets in the bed. Hardwired 12V lights take another route: a 48V power feed through a step-down converter, such as XKGLOW's 12V 30A model.

How do you hook up a Cybertruck light bar?

Through one of Tesla's two 48V power feeds. XKGLOW's manual connects its roof light bar to the roof feed with no converter, because the bar takes 48V natively. You then switch the roof feed on from the touchscreen. Trucks built after about April 2025 lack a harness on that feed, so check yours first.