EcoFlow Delta 3 Max Manual- EcoFlow DELTA 3 (hereinafter referred to as “DELTA 3”, or “the power station”) is a power station with a LiFePO₄ battery and a capacity of 1024Wh. It has multiple outputs, including standard AC ports, USB-A ports, USB-C ports, 12V DC ports and an Extra Battery port to support various appliances and devices.
The variety of charging options allows you to easily switch between different methods based on your actual needs.
About This EcoFlow Delta 3 Max Manual
- This manual contains an introduction to this power station and details on its operation, management, and maintenance. Please note that this manual may be updated without prior notice.
- The availability of certain accessories and features described in this manual may vary depending on your country or region.
- All images displayed in this manual are for demonstrative purposes only. Please refer to the actual product received. The following examples are based on the US version of EcoFlow DELTA 3.
- If you are reading this manual in PDF format, please note that you can access it online at EcoFlow Support for a better experience and the latest updates.
Appearance

| 1 | Main power button ¹ |
| Power on/off • Press the button once to turn on the power station. Long-press the button for 2 seconds to turn it off. Screen on/off • After the power station is turned on, press once to turn on or off the display screen. Reset IoT connections • While the power station is off, long-press the button until the screen displays the power-on animation twice to reset the Bluetooth and Wi-Fi connections. | |
| 2 | AC output control button ² |
| Press the button once to enable or disable AC power output. | |
| 3 | Display screen |
| Displays operating status. | |
| 4 | USB-C output ports |
| Supplies power to charge phones, laptops, game consoles, or other devices. | |
| 5 | AC output ports |
| Supplies power to AC loads (household appliances or other equipment). The appearance and specification of AC output and input ports vary according to your local standards. | |
| 6 | Heat vent |
| Dissipates the internal heat. | |
| 7 | USB output control button ² |
| Press once to enable or disable the USB-C and USB-A output ports. | |
| 8 | USB-A output ports |
| Supplies power to charge phones, laptops, game consoles, or other devices. |

| 9 | Solar/Car charging input port |
| Connects the power station to solar panels or a vehicle power source (cigarette lighter socket or on-board battery charger) for charging. | |
| 10 | Extra battery port |
| DC power supply • Connects the power station to an EcoFlow smart device to supply power.DC charging • Connects the power station to an EcoFlow alternator charger, smart generator, or microinverter for charging.Battery capacity expansion • Connects the power station to an EcoFlow Smart Extra Battery to expand the battery capacity. | |
| 11 | Protective cover |
| Protects against liquids and dust during long-term storage. | |
| 12 | AC charging input port |
| Connects the power station to an AC power source (wall outlet or generator) for charging. | |
| 13 | 12V DC output control button ² |
| Enables or disables the 12V DC output ports. | |
| 14 | 12V DC output port (cigarette lighter) |
| Supplies power to 12V DC loads (automotive refrigerators or other devices). | |
| 15 | 12V DC5521 output ports |
| Supplies power to 12V DC loads (routers, security cameras, effects pedals, or other devices). |
Main power button ¹
The indicator on the main power button will flash white when the power station is performing a firmware update.
AC / USB / 12V DC output control button ²
The indicator on the output control button will flash white when abnormal power output is detected. Please try the following steps to re-enable it.
- Press the button again.
- Remove and re-plug the power cord of the affected appliance(s);
- Upgrade the power station’s firmware via the EcoFlow app.
Display Screen
1. Function Bar

| 1 | Wi-Fi |
| On: Wi-Fi connection successful. Flashing: Wi-Fi connected to the power station is not available. Off: Wi-Fi disconnected. | |
| 2 | Bluetooth |
| On: Bluetooth connection successful. Flashing: Bluetooth pairing in progress. Off: ① Wi-Fi is connected and Bluetooth is disconnected. ② Bluetooth is disconnected because it is turned off on your phone. ※ Please refer to the “Control via EcoFlow App” chapter for more details. | |
| 3 | Self-powered |
| On: Self-powered work mode is enabled in the EcoFlow app. | |
| 4 | Backup Reserve |
| On: Backup Reserve level is set in the EcoFlow app. | |
| 5 | TOU Mode |
| On: TOU (Time of use) mode is enabled in the EcoFlow app. | |
| 6 | Scheduled Tasks |
| On: At least one scheduled task is configured in the EcoFlow app. | |
| 7 | Storm Guard |
| On: Storm Guard mode is enabled in the EcoFlow app. Ensure the Wi-Fi is connected, and the power station is connected to grid power to quickly top up. ※ Scheduled AC charging and solar/car charging tasks are disabled under these conditions. | |
| 8 | Output Port Memory |
| On: Output Port Memory is enabled. When the power station is turned off, undergoes a firmware upgrade, or reaches the discharging level, it stores the current output state before it powers down. Upon being turned on, completing the firmware upgrade, or exceeding the discharging level, it automatically restores all outputs. ※ The power station will not restore an output if that output port is automatically turned off due to its standby time or if it was manually turned off by pressing its corresponding control button. | |
| 9 | Disable Grid Bypass |
| On: AC bypass output is disabled in the EcoFlow app. Now, AC power will come from the power station instead of the grid, even when there is still AC input from the grid. | |
| 10 | UPS Indicator |
| On: The UPS function is available/active. | |
| 11 | Fan Status |
| On: The ventilation fan is running. Flashing: Abnormal fan status. | |
| 12 | Generator Auto On/Off |
| On: The automatic start/stop of the connected generator has been set up in the EcoFlow app. This feature is only applicable to an EcoFlow Smart Generator connected to this power station via the Extra Battery port. |
2. Power Input/Output Details

| 1 | Wi-Fi |
| On: Wi-Fi connection successful. Flashing: Wi-Fi connected to the power station is not available. Off: Wi-Fi disconnected. | |
| 2 | Bluetooth |
| On: Bluetooth connection successful. Flashing: Bluetooth pairing in progress. Off: ① Wi-Fi is connected and Bluetooth is disconnected. ② Bluetooth is disconnected because it is turned off on your phone. ※ Please refer to the “Control via EcoFlow App” chapter for more details. | |
| 3 | Self-powered |
| On: Self-powered work mode is enabled in the EcoFlow app. | |
| 4 | Backup Reserve |
| On: Backup Reserve level is set in the EcoFlow app. | |
| 5 | TOU Mode |
| On: TOU (Time of use) mode is enabled in the EcoFlow app. | |
| 6 | Scheduled Tasks |
| On: At least one scheduled task is configured in the EcoFlow app. | |
| 7 | Storm Guard |
| On: Storm Guard mode is enabled in the EcoFlow app. Ensure the Wi-Fi is connected, and the power station is connected to grid power to quickly top up. ※ Scheduled AC charging and solar/car charging tasks are disabled under these conditions. | |
| 8 | Output Port Memory |
| On: Output Port Memory is enabled. When the power station is turned off, undergoes a firmware upgrade, or reaches the discharging level, it stores the current output state before it powers down. Upon being turned on, completing the firmware upgrade, or exceeding the discharging level, it automatically restores all outputs. ※ The power station will not restore an output if that output port is automatically turned off due to its standby time or if it was manually turned off by pressing its corresponding control button. | |
| 9 | Disable Grid Bypass |
| On: AC bypass output is disabled in the EcoFlow app. Now, AC power will come from the power station instead of the grid, even when there is still AC input from the grid. | |
| 10 | UPS Indicator |
| On: The UPS function is available/active. | |
| 11 | Fan Status |
| On: The ventilation fan is running. Flashing: Abnormal fan status. | |
| 12 | Generator Auto On/Off |
| On: The automatic start/stop of the connected generator has been set up in the EcoFlow app. This feature is only applicable to an EcoFlow Smart Generator connected to this power station via the Extra Battery port. |
3. Power Input/Output Details

| 1 | Total Input Power |
| On: Displays total input power. | |
| 2 | AC Input |
| On: The port is physically connected and has power input. | |
| 3 | Solar Input / Car Input |
| On: The port is physically connected and has power input. Flashing: | |
| 4 | Extra Battery Input/Output |
| On: A compatible EcoFlow product (EcoFlow Smart Extra Battery, EcoFlow Smart Generator, etc) is connected via the Extra Battery port. | |
| 5 | Charging Status |
| On: The power station is charging. | |
| 6 | Total Output Power |
| On: Displays total output power. | |
| 7 | USB-C Output |
| On: The USB-C ports are enabled. | |
| 8 | USB-A Output |
| On: The USB-A ports are enabled. | |
| 9 | 12V DC Output |
| On: The Cigarette Lighter and DC5521 ports are enabled. | |
| 10 | AC Output |
| On: The AC output ports are enabled. | |
| 11 | Frequency |
| On: Displays operating AC power frequency (50/60 Hz). |
4. Battery Level Details

| 1 | Charging/Discharging Limit |
| On: The charging limit (green) or discharging limit (red) is set in the EcoFlow app. | |
| 2 | Remaining Charging/Discharging time |
| On: Displays the remaining charging or discharging time. | |
| 3 | Battery Level |
| On: Displays current battery level. |
5. Error Message
Error Icons

| 1 | High Temperature Warning |
| Flashing: High temperature protection is triggered. Stop the operation and place the power station in a location away from heat sources with good ventilation. The alarm will disappear once the power station temperature returns to normal operating levels. | |
| 2 | Battery Error |
| Flashing: An error has occurred. Check the EcoFlow in-app instructions for troubleshooting. | |
| 3 | Error Code |
| On: An error has occurred. Check the EcoFlow in-app instructions for troubleshooting. | |
| 4 | Low Temperature Warning |
| Flashing: Low temperature protection is triggered. Move the power station to a warmer location to ensure usage within the appropriate temperature range. The warning will disappear once the power station temperature returns to normal operating levels. | |
| 5 | Overload Warning |
| Flashing: Overload protection is triggered. Disconnect some devices from the power station to decrease the overall power output. The warning will disappear once the power output returns to its usual level. |
Buzzer
The power station’s buzzer continues to alarm (beep three times per second) when a severe port malfunction is detected.
Please stop using the power station immediately, remove all input or output connections, and contact EcoFlow Customer Service for troubleshooting.
Getting Started
1. Power On/Off
- Power On
Press the button once to turn on the power station. - Power Off
Long-press the button for 2 seconds to turn it off. - Screen On/Off
After the power station is turned on, press once to turn on or off the display screen.

- The power station can’t be turned off via the main power button when it has a charging input. Please unplug the charging cable first.
- If you still can’t turn off the power station, please disconnect the Bluetooth connection with other devices (e.g. generator) and try again.
2. Control via EcoFlow App
EcoFlow offers a companion app for device management. With this mobile application, you can:
- Enjoy all-in-one control of your EcoFlow devices from anywhere.
- Monitor power consumption details seamlessly with real-time updates.
- Personalise your energy scheme with an array of customizable options.
- Promptly receive in-app troubleshooting and firmware updates.
Download it at: https://download.ecoflow.com/app
For more details, please download the EcoFlow Delta 3 Max Manual from the link below:
| EcoFlow Delta 3 Max Manual Download | |||
|---|---|---|---|
| EcoFlow DELTA 3_User Manual | Download | EcoFlow DELTA 3_User Manual_fi | Download |
| EcoFlow DELTA 3_User Manual_cs | Download | EcoFlow DELTA 3_User Manual_hu | Download |
| EcoFlow DELTA 3_User Manual_da | Download | EcoFlow DELTA 3_User Manual_no | Download |
| EcoFlow DELTA 3_User Manual_el | Download | EcoFlow DELTA 3_User Manual_pl | Download |
| EcoFlow DELTA 3_User Manual_sv | Download | EcoFlow DELTA 3 Plus_User Manual | Download |
| DELTA 3 1500 Power Station-START GUIDE_V1.1 | Download | DELTA 3 Max Plus-User Manual | Download |
| DELTA 3 Max Power Station_User Manual | Download | DELTA 3 Classic_User Manual | Download |
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