What Does This Error Mean?

The DC output (12V car port) on a portable power station often needs to be manually enabled — many models keep DC outputs off by default to save standby power. Find the DC ON/OFF button on the unit (sometimes labeled CAR) and press it to activate the 12V output.

Affected Models

Jackery Explorer series
EcoFlow Delta series
Bluetti AC series
Goal Zero Yeti series
All portable power station brands

Common Causes

DC output not switched on — most power stations have independent DC/AC/USB power buttons
Device connected requires more current than the DC port can supply — typically 10A max
Car port fuse blown from a previous overload or short circuit
Car port connector not fully inserted — 12V car connectors require a firm push to make contact
DC output disabled by BMS due to over-temperature or overload protection

How to Fix It

Press the DC power button to enable the output.

Locate the DC output button on the power station — it is usually labeled DC, CAR, or has a car symbol. Press it once and look for an indicator light confirming the DC output is active. Most power stations do not automatically enable DC output — you must press the button each time the unit is powered on.
Check the device connected to the DC port.

The 12V car port is rated for a maximum current — typically 10A (120W) on most portable power stations. If the connected device (compressor, cooler, CPAP) draws more than the rated current, the BMS will shut the DC output off automatically. Check the device's power draw and compare it to the DC output spec on your power station's label.
Inspect the car port connector for a blown fuse.

Some portable power stations have an internal fuse inside the 12V car port barrel — unscrew the tip of the car port connector (the part that goes into the socket) to access it. Replace a blown fuse with one of the correct amperage — typically 10A or 15A, as printed on the fuse body. A blown fuse is the most common cause of a completely dead 12V output after an overload event.
Ensure a firm connection.

12V car connectors require firm insertion — a loose fit results in no contact and no power. Push the connector fully into the port until you feel or hear a light click. Also try a different 12V accessory cable to rule out a faulty plug on the device side.
Check the power station battery level.

Some portable power stations disable DC output when the battery drops below 5–10% to protect the battery from deep discharge. Charge the unit to at least 20% and try the DC output again. If the battery level shows high but DC still does not work, try a full power cycle — turn the unit completely off, wait 30 seconds, and turn it back on.

When to Call a Professional

If the DC output is switched on but shows 0V when measured with a multimeter, the internal DC converter or the port's fuse has likely failed. Contact the manufacturer for warranty service.