EcoFlow DELTA 2 Max - Portable Power Station Manual

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) 120V~ 50/60Hz
AC (bypass mode)	100-120V~ max. 15A 50Hz/60Hz (Duration time <3 hours when current exceeds total 12 A)
Max X-Boost Output Power	3,400 W
USB-A (×2)	5V 2.4A, max. 12W per port, total 24W
USB-A Fast Charging (×2)	5V 2.4A, 9V 2A, 12V 1.5A, max. 18W per port, total 36W
USB-C (×2)	5/9/12/15/20V 5A, max. 100W per port, total 200W
Car Outlet	12.6V 10A, max. max. 126W
DC5521 Output (×2)	12.6V 3A, max. 38W per port
Input Ports
AC input power	X-Stream max. 1,800W 15A
AC input voltage	100-120V~ max. 15A 50Hz/60Hz
Solar charging input (×2)	11-60V 15A, single port 500W; dual port 1,000W
Car charger	Supports 12V/24V battery, default 8A
Battery Info
Battery type	LFP
Cycle life	3,000 cycles to 80% + capacity
Protection type	Over Voltage Protection, Overload Protection, Over Temperature Protection, Short Circuit Protection, Low Temperature Protection, Low Voltage Protection, Overcurrent Protection
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. Whether the product can be charged or discharged depends on the actual temperature of the battery pack.

EcoFlow App

Control, monitor and customize your EcoFlow DELTA 2 Max from afar with the EcoFlow App. Download at: 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.com/policy/privacy-policy

What's in the Box

Product Details

Overview

1. LCD screen
2. Bluetooth pairing indicator
3. USB-A output port
4. USB-C output port
5. Main power button
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
13. Car outlet port
14. AC charging speed switch
15. Overload protection switch
16. AC output sockets
17. 12V DC power button

1. Ventilator
2. Extra Battery Port 1
3. Extra Battery Port 2

LCD Screen

1. Remaining battery percentage
2. Battery level
3. Remaining charging/ discharging time
4. Extra battery
5. AC output
6. USB-A Output
7. Battery failure warning
8. High temperature warning
9. Low temperature warning
10. Fan
11. Input power
12. Output power
13. Overload warning
14. State of charge
15. Wi-Fi status
16. 12V DC output
17. USB-C output

Icon		Name		State
		Remaining battery percentage		Rotating clockwise: charging 100%: fully charged Flashing: flat battery
		Wi-Fi		Solid: Internet connection succeeded Off: Internet connection failed

Refer to "Troubleshooting" for details.

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. When you start to use the product again, the LCD screen will turn on automatically.
3. The product defaults to 2 hours of standby time. With the output power buttons turned off and no other load for 2 hours, the product will shut off automatically. You can set the standby duration in the app.

Charge Your Devices

After the product is turned on, press "USB power button", "12V DC power button" or "AC power button" once to turn on their corresponding USB/DC/AC ports or sockets; press again to turn them off.

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 AC charging speed can be adjusted via the EcoFlow app. In case of unusual situations where the AC input current remains higher than 20A, the X-Stream charging input port will initiate a self-protection function, and the Overload Protection Switch on the product will automatically pop up. After confirming that there is no product failure, you can press the Overload Protection Switch to resume charging.

The charging power can be adjusted through the AC Charging Speed Switch. You can set the charging power range in the EcoFlow App.

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. EcoFlow takes no responsibilities for any consequences caused by failures to follow instructions, including but not limited to charging with other AC charging cables.

Solar Charging

1. Solar charging cable (MC4-XT60 adapter cable) and the solar panel are supplied separately.
2. When using an EcoFlow solar panel to charge the product, please follow the instructions that come with the solar panel.
3. Before connecting the solar panel, please ensure that the solar panel's output voltage is within 60V to avoid product damages.

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

Smart Extra Battery

A single DELTA 2 Max can connect up to 2 Smart Extra Battery for additional capacity. Please check the user manual of DELTA 2 Max Smart Extra Battery for more information.

1. Turn off both the Smart Extra Battery and DELTA 2 Max before connecting or disconnecting them.
2. Before using, make sure both DELTA 2 Max and Smart Extra Battery display the extra battery icon on their screens.
3. Do not directly connect or remove the Smart Extra Battery during charging and discharging processes. If you need to connect or remove it midway, please turn off the product first.
4. Do not touch the metal terminals of the Smart Extra Battery connector. If the metal terminals need to be cleaned, gently wipe them with a dry cloth.

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. X-Boost is not available for all electrical appliances; it's incompatible with appliances with strict voltage requirements. Appliances with voltage protection (such as precise instruments) are not supported. X-Boost mode is more suitable for heating devices. Please conduct your own tests with your devices with X-Boost enabled.

Bypass mode: When the product is plugged into the power socket for recharging and connected to other devices at the same time, it cannot provide power to the devices if the AC power button is turned on, instead, the devices are powered by the grid.

EPS (Emergency Power Supply)

The product supports EPS. When you connect the grid power to the AC Input Port of the product through an AC cable, you can power electrical devices through the AC Output Port (AC power will come from the grid and not the power station in this situation). In case of a sudden blackout, the product can automatically switch to the battery powered supply mode within 30ms.

As a basic UPS function, this function does not support 0ms switching. Please do not connect the product to any device that requires 0ms UPS, such as data servers and workstations. Please test and confirm the compatibility before using the product. We recommend that you only charge one device at a time and avoid using multiple ones at the same time to avoid overload protection. EcoFlow takes no responsibilities for any device failures or data losses caused by failures to follow instructions.

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. 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.
4. How do 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.
5. How do I clean the product?
   Gently wipe it with a dry, soft, clean cloth or paper towel.
6. How do I store the product?
   Before storing, please turn off the product first, and then store it in a dry and ventilated place at room temperature. Do not place it near water sources. For long-term storage, please discharge and recharge the product every three months to extend its battery life.
7. Can I bring the product on a plane?
   No.

Storage and Maintenance

1. Ideally, use and store the product in a place of between 20°C ~ 30°C (68°F ~ 86°F), and always keep it away from water, intense heat, and sharp objects. For an extended product lifespan, do not store it in places above 45°C (113°F) or below -10°C (14°F).
2. For long-term storage, please discharge the product every three months (firstly discharge it to 0%, then fully recharge it, and lastly discharge it to 60%); the product will not be covered by the warranty if it is not charged or discharged for more than 6 months.

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.
	(Flashing)	High Temperature Discharging Protection	The power supply will resume automatically once the battery cools down.
	(Flashing)	Low Temperature Charging Protection	Charging will resume automatically once battery temperature rises above 5°C (41°F).
	(Flashing)	Low Temperature Discharging Protection	The power supply will resume automatically once the battery temperature rises above -12°C (10°F).
	(Flashing)	AC Output Overload Protection	Normal operation will resume automatically once you remove the overloaded device and restart the product. Electrical appliances should be used within rated power. (Refer to X-Boost instructions to get more details about power limitations).
	(Flashing)	AC High Temperature Protection	Please confirm whether the fan inlet and outlet are blocked, if not, normal operation will be resumed automatically after the product temperature drops.
	(Flashing)	AC Low Temperature Protection	Normal operation will resume automatically once the product is used at optimum environmental temperatures.
	(Flashing)	Fan Blockage	Please check if the fan is blocked by foreign materials.
	(Flashing)	Car Charger Overload Protection	The product will resume normal operation automatically after you remove the device connected to the car charger.
	(Flashing)	Car Charger High Temperature Protection	After the product cools down, it will resume normal operation automatically.
	(Stays on)	Battery Failure	Contact EcoFlow customer service.

If the Alarm Prompt shows on the product LCD screen during use and does not disappear after a restart, please stop using it immediately (do not try to charge or discharge). If you require any other assitance, please contact EcoFlow Customer Service.