EcoFlow DELTA2 Max Frequently Asked Questions

Can I use the product when it is wet?

It is strictly forbidden to expose this product to any liquid. Do not immerse or wet this product in water. Do not use the product in rain or wet environment.

Can I take the product on an airplane?


What if the product cannot be turned on?

1. Try to charge the device and then turn on the power. If charging fails, troubleshoot the problem as the power cannot be charged. 2. If there is no response after you short or long press (for 3 seconds) the main power button, contact the after-sales service team for help.

What if the product cannot be charged?

1. The charging temperature is too high. If you use high power appliances for a long time, stop using the product until the temperature drops. 2. The charging temperature is too low. Place DELTA 2 Max in a warm environment. 3. Check whether the input meets the specifications. 4. Check whether a charging limit is set. 5. In case of charging failure, try to change the charging method or charging cable.

What are recommendations for storage if the device is not used for a long time?

1. Store the product away from water, heat sources, and metal objects. 2. To extend the battery life, it is recommended to use or store the product at ambient temperature from 20°C to 30°C. 3. For long-term storage, charge and discharge the product once every 3 months (firstly discharge it to 0%, then fully charge the device, and then discharge it to 60% for long-term storage); products not charged and discharged for more than 6 months will not be covered by warranty. 4. For safety reasons, do not store this product at ambient temperature higher than 45°C or lower than –10°C for a long time. 5. If the product is critically low on power and left unused for a long time, it will enter sleep mode and will need to be recharged before you need to use it again.

Is DELTA 2 Max Extra Battery compatible with DELTA Max and DELTA 2?

The DELTA 2 Max Extra Battery is compatible with DELTA Max (2000) and DELTA 2.

Can I switch the frequency? How to switch it?

It is not recommended to switch the frequency. If required, turn on the AC power supply, press and hold the AC output switch for 10 seconds to switch the frequency. (Do not switch the AC output frequency; otherwise, it may cause failure of some appliances.)

Is it also impossible to turn off the device while charging? Will it turn on automatically if it is off after powering up?

In the off state, the product will automatically turn on after powering up. The device cannot be switched off during charging.

How to calibrate the SOC?

Fully discharge and charge the battery for one time and then recalibrate it.

What is the battery type?

LFP battery. 80% capacity remaining after 3000 cycles.

What connection methods does the APP support?

Bluetooth and Wi-Fi.

How many solar panels can be installed, and what is the solar charging power?

DELTA 2 Max has 2 solar/car charging input ports, with voltage range of 11-60V for each port, and maximum solar charging power 500W for each port. Each port can be connected to one 400W solar panel, or two 220W solar panels in series.

Can it be used with other ecosystem products?

It supports WAVE and WAVE 2 portable air conditioners, GLACIER portable refrigerator,s and Smart Generators.

Can DELTA 2 Max be used with the Extra Battery?

Up to 2 Extra Batteries can be connected. It is compatible with DELTA Max Extra Battery. It can be expanded to 6144Wh at maximum.

What are the weight and noise level?

Net weight: 23 kg. Within a range of 50 cm, the noise level is 30 dB when the input or output power is below 500W.

What is the capacity of the product?


Does it support charging while using?

Yes, power station supports charging and discharging when charging in vehicles,portable solar panel, etc. However, when the battery of the machine is low or is about to run out, it is best not to output while connecting to DC charging (solar/vehicle charging); at this time, if the input of the power is less than or equal to the output power, the device will continue to consume power, which may result in power loss and eventually damage the battery.

How do I access EcoFlow's EU Declaration of Conformity documents?

A copy of the documents is available online at

How long can the product charge my devices?

The charging time is shown on the product’s LCD Screen, which can be used to estimate the charging time of most appliances with stable power usage.

How can I know if the product is charging?

When it’s charging, the remaining charging time will be shown on the LCD Screen. Meanwhile, the charging indicator icon begins to rotate with the remaining battery percentage and the input power shown on the right of the circle.

How to clean the product?

Please gently wipe it with a dry, soft, clean cloth or paper towel.

How does the Emergency Power Supply (EPS) work? And how fast is it?

When your portable power station is plugged into the wall, any electronics plugged into it are powered from the grid and not its battery. When power from the grid stops, as in a blackout, the power station automatically switches to battery power within 30ms.