EcoFlow DELTA Pro Ultra User Manual Disclaimer Please read this User Manual and ensure you understand it fully before using the product. Please keep this User Manual properly for future reference. In this manual and other related documents, EcoFlow DELTA Pro Ultra Inverter is referred to as the inverter, and EcoFlow DELTA Pro Ultra Battery is referred to as the battery.
unanticipated results. Safety Instructions WARNING SAVE THESE INSTRUCTIONS – This manual contains important instructions for model EFYJ751PCS-US and EFYJ751-BP that shall be followed during installation and maintenance. 1. Before installing, using and maintaining the product, please read carefully the safety instructions in this manual. EcoFlow is not responsible for any problems caused by improper handling of the product in installation and maintenance procedures. 2.
9. Handle this product with care to prevent it from being damaged due to overturning. If the product is badly damaged after overturning, please turn off the power immediately, place the battery in an open area away from combustible materials or people, and properly dispose of it according to the requirements of local laws and regulations. 10.
1. Do not stand, lean or sit on the device. 2. If the product will not be used for a long period of time, make sure that it is unplugged from the outlet and turned off. 3. Do not connect this device with damaged cables. Use of damaged cables may affect the normal operation of the device or lead to potential risks. 4. Do not put your hands or foreign objects into the device ports or vents.
Wi-Fi Bluetooth Output Information AC Output (Discharging) AC Output (Bypass) USB-A(×2) USB-C (×2) DC Output (×1) Input Specifications AC Input (Charging) AC Input (Bypass) Power Input/Output Port High Voltage PV Input Low Voltage PV Input Ambient Temperature Discharging Temperature Charging Temperature Storage Temperature Other Information Altitude IP Rating Noise Level UPS Communication Method Frequency range: 2,412-2,462 MHz/2,422-2,452 MHz Maximum output power: 0.
1. Press and hold the AC output switch for 10 seconds to switch the AC output frequency. 2. The IP rating is IP54 when the product is not in use. 3. For most scenarios, noise level of the product is less than 30 dB. 4. When the ambient temperature exceeds 40°C (104°F), the charging and discharging power are recommended to be equal to or less than 5,000W when charging and discharging the product at the same time.
1. Whether the product can be charged or discharged depends on the actual temperature of the battery. 2. The battery will automatically start self-heating if the temperature is lower than 0 °C (32 °F). To disable this, please set it in the app. What's in the Box 1. After unpacking, ensure that all components are intact. Contact EcoFlow customer service if there is any missing or damaged component. 2. For components not included in the box, please purchase them on the official website.
EcoFlow DELTA Pro Ultra Battery EcoFlow Battery Connection Cable Optional Components (not in the box) EcoFlow Trolley EcoFlow EV X-Stream Adapter EcoFlow AC Generator Charging Adapter EcoFlow 50 Amp Hub EcoFlow Fixing Metal Tab EcoFlow Solar Panels Product Introduction 1. The illustrations provided in this document are for demonstration purposes only. Product details may appear slightly different depending on the product version and market region. 2.
Please ensure that the product is installed in a well-ventilated place and do not block the ventilation fans during operation. Insufficient ventilation may damage the equipment. 1. 4G dongle port 2. AC output socket (120V 20A max. per port) - Backup UPS 3. AC output socket (120V 20A max. per port) - Online UPS 4. AC output socket (120V 30A max.) - Online UPS 5. AC output socket (120V/240V 30A max.) - Backup UPS 6. Ground screw 7. AC charging input port 8. AC charging speed switch 9.
21. Vent EcoFlow DELTA Pro Ultra Battery 1. Battery port 2. Main power button 3.
Open the side covers (remember to insert them into grooves) EcoFlow DELTA Pro Ultra Battery Open the side covers (remember to insert them into grooves) Battery Capacity Description The rated capacity of the battery is 6,144Wh. To expand capacity, the inverter can connect to up to 5 batteries. EcoFlow Fixing Metal Tabs need to be installed when connecting one inverter to more than three batteries.
Data in the following illustration is for reference purpose, please refer to the actual product. LCD Screen 1. Total input power 11. Error report 21.
2. Input indicator 3. 4G connection 4. Wi-Fi connection 5. Bluetooth connection 6. Backup mode 7. Low-temp warning 8. High-temp warning 9. Self-consumption mode 10. Battery failure warning Numbe r 12. Error code 13. Ventilation fan 14. Charging limit 15. Timer 16. Charging/discharging level 17. AC output 18. Output indicator 19. Total output power 20. Power output 22. USB-A output 23. USB-C output 24. Remaining battery percentage 25. Remaining charging/discharging time 26.
10 11+12 15 16 17 18+19 24 25 26 Battery not heated Battery failure Solid When there is an error, 12 shows up solid; you can check the error code checklist for details or ask aftersales service When there is an error, 11 shows up blinking Ventilation fan failure Blinking Blinking 13 14 Off Blinking Solid Off Solid Off Solid Blinking Solid Blinking Solid Slow charging (max.
3. All the icons under "INPUT" will only show up when input ports of the product are connected; these icons start to blink when there is a product failure. 4. The rotating speed of the ventilation fan icon depends on the gear. 5. For more details about error codes, please visit the EcoFlow official website or contact EcoFlow customer service. Installation EcoFlow Portable Stand Installation 1.
Product Installation 1. As the product is very heavy, we recommend that two people carry it to avoid potential personal injury. 2. Ensure that the battery ports of both inverter and battery are on the same side when you install them, otherwise, you can't connect them with the battery cable. 1 Align the battery with grooves of the portable stand. 2 Repeat the action in step 1 to mount the inverter onto the battery.
1. To avoid accidental unplugging, we recommend that you lock the battery cable. After you mount the battery cable, you can lock the cable with a flathead screwdriver; when you need to remove the cable, remember to unlock it first. 2. One inverter supports up to 5 batteries. 3 Open the protective cover of the battery port, then connect the battery cable to the port. (For more installation options, you can also purchase the 1-meter long battery conntection cable from EcoFlow official website.
5 If you have 2 sets of products, you can put one set on top of the other set. Be noted that the top set should be installed with supporting legs instead of casters. 1. For long-time use, lock casters by flicking the brake down, so that the product can't be moved anymore. If you need to move the product, flick the brake up to unlock the casters. 2. Do not move the whole set of products if you connect the inverter to three or more batteries.
3. We suggest that you fix the whole set of products with fixing metal tabs if you connect 3 or more batteries to the inverter. The fixing metal tabs are installed on the battery directly under the inverter. For more details, please refer to the quick start guide of EcoFlow Fixing Metal Tab. 4. The recommended installation distance from the wall is 5cm for the purpose of heat dissipation.
• • • • • When the product is turned on, the LCD screen will light up; pressing the main power button again will turn off the LCD screen but will not turn off the product. If the inverter is connected to more than one battery, you can press & hold the main power button of any battery to turn on the product. The product will go into standby mode, with the LCD screen shut down, if it hasn't been used for 5 minutes. When you start to use the product again, the LCD screen will turn on automatically.
LED Indication Status Power on Power off Discharging Charging Description LED 1 to 5 sequentially lights up LED 5 to 1 sequentially shuts down 81%~100%:LED 1 to 5 solid 61%~80%:LED 1 to 4 solid 41%~60%:LED 1 to 3 solid 21%~40%:LED 1 to 2 solid 1%~20%:LED 1 solid 0%:LED 1 to LED 5 blinking 0~20%:LED 1 blinks 21~40%:LED 1 remains solid, LED 2 starts to blink 41~60%:LED 1 to 2 remain solid, LED 3 blinks 61~80%:LED 1~3 solid, LED 4 blinks 81~99%:LED 1~4 solid, LED 5 blinks 100%:LED 1 to L
BMS high-temp notice BMS low-temp notice Upgrade firmware status Heating abnormality during charging Heating abnormality during discharging LED 2 blinks LED 3 blinks LED 2 and LED 3 blink alternately LED 4 blinks for about 10 seconds LED 5 blinks for about 10 seconds Charge Your Appliances AC/DC Output Press the DC power button or AC power button to enable AC output ports and DC output ports, and press again to disable them.
Recharge the Product AC Charging Keep the AC power button off while recharging the product through a high-voltage wall outlet. You can recharge the product by connecting the supplied AC charging cable to the fast charging input port of the product and a wall outlet. To adjust the charging speed, you can either flick the AC charging speed switch or set it up in the EcoFlow app.
The charging speed can be adjusted via the AC charging speed switch. Turn the switch to the left, the charging speed will be at its peak; turn the switch to the right, and the charging speed will return to the default value. You can set the charging speed in the app.
1. Connect to solar panels Connect in series 1) Low-PV input voltage range: 30V < panel 1 + ... panel n < 150V 2) High-PV input voltage range: Voltage range: 80V < panel 1 + ... panel n < 450V 3) Low-PV input + high-PV input Voltage range for low-PV input: 30V < panel 1 + ... panel n < 150V Voltage range for high-PV input: 80V < panel 1 + ...
Connect in parallel Current range: panel 1 + ... panel n < 15A 2. Remove solar charging cables 1. Turn off the PV switch.
2. Align the d/a tool with solar connectors and detach them manually once they have dislodged off from the high-PV input ports. Charge via EV Charger Connect your EV charger to the product to enable charging via the EV charger. If you are unsure how to connect your EV charger to the product, refer to the user manual for EV charger or contact the manufacturer for details. 1 Connect one side of the EV adapter to the power input/output port and the other side to the EV charger.
To avoid accidental unplugging, lock the adapter and unlock it when you need to remove the adapter (for details, check "Installation> Product Installation"). Charge via the Generator Connect your generator to the product to enable charging via the generator. If you are unsure how to connect your generator to the product, refer to the user manual for generator or contact the manufacturer for details.
Solar Charging + AC Charging Connect the product to solar panels and a wall outlet at the same time. Solar Charging + EV Charger Connect the product to solar panels and an EV charger at the same time. Solar Charging + Generator Connect the product to solar panels and a generator at the same time. 1.
1. AC output sockets - Backup UPS support 20 ms switching. 2. AC output sockets - Online UPS support 0 ms switching. Whole Home Backup System 1. The installation should be performed by a licensed electrician. Improper installation may result in death or serious injury and property damage. 2. This section is for reference purpose ONLY and does not constitute legal advice.
How to Connect Scheme 1 EcoFlow DELTA Pro Ultra (×3 sets max) + EcoFlow Smart Home Panel 2 (sub panel) + main panel + meter + grid Scheme 2 EcoFlow DELTA Pro Ultra (×2 sets max) + EcoFlow 50 Amp Hub + 50 Amp transfer switch + main panel + meter + grid
Scheme 3 EcoFlow DELTA Pro Ultra (×1 set) + 30 amp transfer switch + main panel + meter + grid
Download EcoFlow App Control, monitor, and customize your EcoFlow DELTA Pro Ultra from afar with the EcoFlow App. Download here: https://download.ecoflow.com/app Privacy Policy By using EcoFlow Products, Applications, and Services, you consent to the EcoFlow Term of Use and Privacy Policy, which you can access via the “About” section of the “User” page on the EcoFlow App or on the official EcoFlow website at https://www.ecoflow.com/policy/terms-of-use and https://www.ecoflow.
Cable connection Ensure all cables are intact and securely connected. Every 3 months EcoFlow DELTA Pro Battery 1. The battery must remain at 45°C for at least 20 hours during two charge/discharge cycles. 2. If the charging/discharging level is not fully charged after one month or 30 cycles, it will automatically charge up to 100% for calibration (calibration). When calibration is complete, it automatically reverts to the user-set charge/discharge limit. 3.
1. When the temperature is below -10℃ (14°F) and the remaining battery percentage is above 80%, the discharging heating will automatically turn off. 2. When the temperature is below -5℃ (23°F) and the remaining battery percentage is below 80% and above 60%, the discharging heating feature will automatically turn off. 3. When the temperature is below 0℃ (32°F) and the remaining battery percentage is below 60% and above 30%, the discharging heating feature will automatically turn off. 4.
The remaining charging time is displayed on the inverter's LCD screen, which can be used to estimate the remaining charging time for most appliances with stable power consumption. 7. How do I know if the product is charging? When it is charging, the remaining charging time will be displayed on the inverter's LCD screen. 8. How do I clean the product? Please use a dry, soft and clean cloth or tissue to clean the product. 9. Can I take the product on a plane? No, you can't.