EcoFlow DELTA 2 Max User Manual V1.
Disclaimer Before using this product, please read and fully understand this document and all related documents of this product. After reading this document, please keep it well for future reference. Failure to properly operate this product could cause serious injury to yourself or others, or damage to this product and other property. By using this product, you are deemed to have understood, acknowledged and accepted all terms and contents of this document.
Content Specifications 1 Safety Instructions 2 EcoFlow App 4 What's in the Box 4 Product Details 6 Overview 6 LCD screen 7 Power On/Off 8 Charge Your Devices 8 Charge DELTA 2 Max 9 AC Charging 9 Solar Charging 10 Car Outlet Charging 11 Smart Extra Battery 11 X-Boost and EPS 12 X-Boost 12 EPS 12 FAQ 13 Storage and Maintenance 13 Troubleshooting 14
Specifications General Info Model EFD350 Weight Approximately 23 kg (50 lbs) Dimension 497 × 242 × 305 mm (19.6 × 9.5 × 12 in) Capacity 2,048Wh Bluetooth Frequency range: 2,402-2,480 MHz Maximum output power: (US) 0.005W; (CA) 0.012W Wi-Fi Frequency range: 2,412-2,462 MHz/2,422-2,452 MHz Maximum output power: (US) 0.071W; (CA) 0.177W Output Ports AC (×6) Pure sine wave, 2,400W total (surge 4,800W) US: 120V~ 50/60Hz; AC (bypass mode) 100-120V~ max.
Operating Temperature Optimal operating temperature 20°C to 30°C (68°F to 86°F) Discharging temperature -10°C to 45°C (14°F to 113°F) Charging temperature 0°C to 45°C (32°F to 113°F) Storage temperature -10°C to 45°C (14°F to 113°F) (optimal: 20°C to 30°C (68°F to 86°F)) Add-ons Smart extra battery Up to 2 units (sold separately) Smart generator Supported (sold separately) 1. A car charger shares power with the DC5521 output port, offering a maximum output of 126W. 2.
14. Do not use unofficial components or accessories to avoid the risk of fire, electric shock or injury to persons. If you need to replace any components or accessories, please visit official EcoFlow channels for relevant information. 15. When using the product, please strictly follow the operating environment temperature specified in this user manual.
29. When the power supply is connected in normal mode to a refrigerator, power fluctuations may cause the power supply to shut down automatically. When connecting the power supply to a refrigerator that stores medicine, vaccines or other valuable items, it is recommended to set the AC output to "Always on" in the app. This helps support a continuous power supply and ensures a safe and efficient power consumption state. 30. SAVE THESE INSTRUCTIONS Disposal Guide 1.
What's in the Box DELTA 2 Max AC charging cable DC5521 to DC5525 Cable User manual & warranty card 5 Car charging cable
Product Details Overview ❶ ❷ ❸ ❹ ❻ ❼ ❽ ❺ 1. LCD screen 2. Bluetooth pairing indicator 3. USB-A output port 4. USB-C output port 5. Main power button ❶ ❷ ❾ ❿ ⓫ ⓬ ⓭ 6. USB-A fast charging output port 7. USB power button 8. Main power indicator 9. Solar/car charging input port 10. X-Stream charging input port 11. AC power button 12. DC5521 output port ⓮ ⓯ ⓰ ⓱ 13. Car outlet port 14. AC charging speed switch 15. Overload protection switch 16. AC output sockets 17. 12V DC power button 1 ❸ 1.
LCD Screen 1. Remaining battery percentage 2. Battery level 3. Remaining charging/ discharging time 4. Extra battery Icon 5. AC output 6. USB-A Output 7. Battery failure warning 8. High temperature warning 9. Low temperature warning 10. Fan Name Remaining battery percentage Wi-Fi Refer to "Troubleshooting" for details. 7 11. Input power 12. Output power 13. Overload warning 14. State of charge 15. Wi-Fi status 16. 12V DC output 17.
Power On/Off Press the main power button once to turn on the product, then the LCD screen lights up and the main power indicator becomes breathing white; press and hold the main power button for at least 3 seconds to turn off the product, meanwhile, the LCD screen goes off. 1. After main power turned on, press the main power button once to turn off the LCD screen 2. If the product is not used for 5 minutes, it will enter hibernation state with the LCD screen gone off.
AC power button 12V DC power button 1. After the USB or DC power button is turned on, the product will not shut off automatically. 2. Make sure that the total power of all loaded devices is lower than that of the rated power. 3. After 12 hours without any load for the AC output ports, the AC power button will shut down automatically. Charge DELTA 2 Max AC Charging EcoFlow’s X-Stream fast charging technology is specifically designed for AC charging.
The charging power can be adjusted through the AC Charging Speed Switch. You can set the charging power range in the EcoFlow App. Maximum X-Stream charging Customized charging power: 200~ 1,800W 1. Please use the AC Charging Cable included in the package for fast charging. Do not use other cables to charge. 2. Plug directly into an AC wall outlet and make sure that the wall output current is more than 15A. Otherwise, reduce the unit charging speed with the AC Charge Speed Switch.
Car Charging To avoid failure to start due to insufficient car battery, use the car charger after the vehicle is started. In addition, please make sure that the cigarette lighter of the Car Outlet and the Car Charger Input Cable are in good condition. EcoFlow takes no responsibilities for any losses or damages caused by failures to follow instructions Car charging cable Smart Extra Battery A single DELTA 2 Max can connect up to 2 Smart Extra Battery for additional capacity.
X-Boost and EPS X-Boost To avoid operation failure due to overload protection, the X-Boost feature will be automatically enabled when the total output exceeds the rated output power, which enables the product to power high wattage appliances at the rated output power. 1. X-Boost is not available when the AC output is turned on in a recharging state (in bypass mode). 2. X-Boost is enabled by default, you can adjust it in the EcoFlow App. 3.
FAQ 1. What battery does the product use? High-quality LFP battery. 2. What devices can the product’s AC output port power? With high rated power and peak power, the product’s AC output port can power most household appliances. Before you use it, we recommend that you confirm the power of the appliances first and ensure the power sum of all loaded appliances is lower than the rated power. 3.
Troubleshooting Indicator Problem Solution (Flashing) USB-A Overload Protection Resume normal operation by removing the electrical device connected to the USB-A port. (Flashing) USB-C Overload Protection Resume normal operation by removing the electrical device connected to the USB-C port. (Flashing) High Temperature Charging Protection Charging will resume automatically once the battery cools down.
