Err 11
EcoFlow Portable Power Station
Severity: ModerateWhat it means
EcoFlow Err 11 means the DC output circuit has detected an overcurrent — typically a single device pulling more amps than the port can deliver, or several DC devices added together pushing past the limit.
The unit shuts the DC output off to protect the wiring and the battery.
Err 11 clears the moment the offending load is removed and the unit is power-cycled.
Affected Models
- EcoFlow DELTA / DELTA 2
- EcoFlow DELTA Mini
- EcoFlow DELTA Pro
- EcoFlow RIVER 2 / RIVER 2 Max / RIVER 2 Pro
Common Causes
- 12V car-socket port loaded with a high-draw fridge or compressor that spiked past the port's 10 A limit at startup
- USB-C PD port pulling 100 W into a laptop while another USB device also draws full power
- Short-circuit in the DC cable or accessory (chewed-through 12V plug)
- Cheap 12V splitter combining several loads onto one port
How to Fix It
-
Disconnect every DC accessory.
Pull the 12V plug, both car-socket adapters, and every USB cable.
Press the DC output button on the front to switch the output off if it's still active.
Leave the AC side alone for now — Err 11 is a DC-side issue. -
Power-cycle the unit.
Hold the main power button for around 8 seconds until the screen goes dark.
Wait 30 seconds.
Power back on.
The error indicator should clear with no DC load attached. -
Reconnect one device at a time.
Plug in the lowest-draw device first (a phone charger).
If everything stays clear, add the next one.
Continue until Err 11 trips again — the last device added is your overload.
Check that device's rated current draw against the port's limit, which is printed on the unit and in the manual. -
Inspect the cable that triggered it.
If a single device caused Err 11 and you'd expect it not to, look closely at the cable for damaged insulation or a melted connector.
A short between the conductors looks exactly like a high-draw device to the EcoFlow.
Replace the cable before retesting.
Frequently Asked Questions
Why does Err 11 happen on a 12V fridge that worked fine yesterday?
Compressor fridges draw a high startup surge — much more than their running watts — and on a cold day the surge climbs even higher.
If the fridge is right at the EcoFlow's 12V port limit on a warm day, a colder ambient temperature is enough to push it over.
The fix is usually to run the fridge from the EcoFlow's AC port with its 12V mains adapter instead, where the inverter handles the surge differently.