What Does This Error Mean?

Pass-through charging (charging the station and powering devices at the same time) requires both the AC/DC input and the output ports to be switched on. Press the output button (AC, USB, or DC) on the power station even while it is charging — many models require this step.

Affected Models

Jackery Explorer 1000 Pro
EcoFlow Delta 2
Bluetti AC200P
Goal Zero Yeti 1000X
All portable power stations that support pass-through

Common Causes

Output ports not switched on while charging — you must manually enable output even during recharge
Model does not support pass-through — some entry-level models disable output when AC input is connected
High temperature during fast charging — BMS disables output to manage heat when charging at high wattage
AC output requires a separate power button press even when DC/USB outputs are active
Simultaneous charge and discharge exceeding the BMS protection limits

How to Fix It

Press the output button while charging.

Connect the power station to its AC adapter or solar panels to start charging. Then press the output button (AC, USB, or DC) to enable power delivery to connected devices. Many power stations do not automatically enable outputs when plugged in — the output buttons must be pressed separately from the charging connection.
Verify your model supports pass-through charging.

Not all portable power stations support simultaneous input and output. Check your model's specification sheet or user manual for 'pass-through charging' or 'simultaneous charge and discharge' in the features list. Entry-level power stations (under 300Wh) often disable output during fast charging to protect the BMS.
Reduce the charging input wattage.

Charging at maximum wattage (e.g., 1200W AC input) generates significant heat, which can trigger the BMS to disable output ports. Reduce the charge rate — for EcoFlow units, use the EcoFlow app to set a lower AC input limit (e.g., 400W instead of 1200W). At a lower charge rate, the internal temperature stays lower and pass-through is more reliable.
Check the total power budget.

During pass-through, the connected output devices receive power first from the input, with the remainder going to battery charging. If the output devices draw more power than the input supplies (e.g., 200W of devices on a 150W solar input), the battery supplies the difference and may discharge rather than charge. Reduce the connected load or increase the input source to maintain a net positive charge rate.
Test with the AC output only.

Try enabling only the AC output (not USB or DC) while charging — AC output sometimes works when other ports do not, due to firmware priority handling. Also try with all output ports disabled except one to rule out a total load issue. If no output works during AC input on a model that claims to support pass-through, try a firmware update from the manufacturer's app.

When to Call a Professional

If your power station model is listed as supporting pass-through in its specifications but consistently refuses to output power while charging, contact the manufacturer — the BMS firmware may need an update.