EcoFlow DELTA 2
User Manual
V1.0
Disclaimer
Read this user manual carefully before using the product to ensure that you completely
understand the product and can correctly use it. After reading this user manual, keep it
properly for future reference. Improper use of this product may cause serious injury to yourself
or others, or cause product damage and property loss. Once you use this product, it is deemed
that you understand, approve and accept all the terms and content in this document. EcoFlow
is not liable for any loss caused by the user's failure to use this product in compliance with this
In compliance with laws and regulations, EcoFlow reserves the right to final interpretation of
this document and all documents related to this product. This document is subject to changes
(updates, revisions, or termination) without prior notice. Please visit EcoFlow's official website
to obtain the latest product information.
user manual.
Content
Specications
Safety Instructions
EcoFlow App
What's in the Box
Product Details
Overview
LCD screen
Power On/Off
Charge Your Devices
Charge DELTA 2
AC Charging
Solar Charging
Car Outlet Charging
Smart Extra Battery
Smart Generator
X-Boost and EPS
X-Boost
EPS
FAQ
Storage and Maintenance
Troubleshooting
FCC Warning & IC Warning
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Specications
General Info
Net Weight Approximately 12 kg (27 lbs)
Dimensions 400 × 211 × 281 mm (15.7 × 8.3 × 11.1 in)
Capacity 1,024Wh, 51.2V
Wi-Fi
Bluetooth
Output Ports
AC (×6)
AC (bypass mode) 100-120V~ 50/60Hz total 13A
Max X-Boost Output Power 2,200W
USB-A (×2) 5V 2.4A, 12W max. per port, total 24W
USB-A Fast Charging (×2)
USB-C (x2) 5/9/12/15/20V 5A, 100W max. per port, total 200W
Car Outlet 12.6V 10A, 126W max.
DC5521 Output (x2) 12.6V 3A, 38W max. per port
Input Ports
AC Charging X-Stream Fast Charging 1,200W max.
AC Input Voltage 100-120V~ 50Hz/60 Hz
Solar Charging 11-60V 15A Max, 500W Max
Car Outlet Supports 12V/24V Battery, default 8A
Battery Info
Cell Chemistry LFP
Cycle Life 3,000 cycles to 80% + capacity
Protection Type
Frequency Range: 2412-2462MHz/2422-2452MHz
Maximum Output Power: 0.071W (US); 0.177W (Ca)
Frequency Range: 2,402-2,480MHz
Maximum Output Power: 0.005W (US); 0.012W (Ca)
Pure Sine Wave, 1,800W total (surge 2,700W),
120V~ (50Hz/60Hz)
5V 2.4A, 9V 2A, 12V 1.5A, 18W max. per port,
total 36W
Over Voltage Protection, Overload Protection,
Over Temperature Protection, Short Circuit
Protection, Low Temperature Protection, Low
Voltage Protection, Overcurrent Protection
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Environmental Operating Temperatures
Optimal Operating Temperature 20°C - 30°C (68°F - 86°F)
Discharging Temperature -10°C - 45°C (14°F - 113°F)
Charging Temperature 0°C - 45°C (32°F - 113°F)
Storage Temperature
-10°C - 45°C (14°F - 113°F) (optimal: 20°C 30°C (68°F - 86°F))
Add-ons (sold separately)
Smart Extra Battery Supported (sold separately)
Smart Generator Supported (sold separately)
1. The car outlet 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.
Safety Instructions
Usage
1.
Do not use the product near a heat source, such as a re source or a heating furnace.
2.
Avoid contact with any liquid. Do not immerse the product in water or get it wet. Do not use
the product in the rain or humid environments.
3.
Do not use the product in an environment with strong static electricity/magnetic elds.
4.
Do not disassemble the product in any way or pierce the product with sharp objects.
5.
Avoid using wires or metal objects that may result in a short circuit.
6.
Do not use unofcial components or accessories. If you need to replace any components or
accessories, please visit ofcial EcoFlow channels to check relevant information.
7.
When using the product, please strictly follow the operating temperatures specified in
this user manual. If the temperature is too high, it may result in a re or explosion; if the
temperature is too low, the product performance may be severely reduced, or the product
may cease to work.
8.
Do not stack any heavy objects on the product.
9.
Do not forcibly lock the fan during use.
10.
Please avoid impact, falls, or severe vibrations when using the product. In case of a severe
external impact, turn off the power supply immediately and stop using the product. Ensure the
product is well fastened during transportation to avoid vibrations and impacts.
11.
If you accidentally drop the product into water during use, please place it in a safe open area,
and stay away from it until it is completely dry. The dried product should not be used again, and
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should be properly disposed of according to section "Disposal Guide". If the product catches re,
we recommend that you use the re extinguishers in the following order: water or water mist,
sand, re blanket, dry powder, and nally a carbon dioxide re extinguisher.
12.
Use a dry cloth to clean off dirt from the product ports.
13.
Put the product on a flat surface to avoid damages caused by the product falling over. If the
product is overturned and severely damaged, turn it off immediately, place the battery in an open
area, keep it away from combustible matter and people, and dispose of it in accordance with local
laws and regulations.
14.
Ensure that the product is kept out of reach of children and pets.
15.
Store the product in a dry and ventilated place.
16.
We recommended that you use moisture barrier bags in wet environments (for example, places
by the sea or waterways) to prevent the product from getting soaked. If water is found inside the
product, it must not be used or turned on again. Please take anti-electric shock measures before
touching the product. Following this, place the product in a safe, waterproof and open area. Once
complete contact EcoFlow Customer Service immediately.
17.
This product is not recommended for powering medical emergency equipment related to personal
safety, including but not limited to medical grade ventilators (hospital version CPAP: Continuous
Positive Airway Pressure), artificial lungs (ECMO, Extracorporeal Membrane Please follow
your doctor's instructions and consult with the manufacturer for restrictions on the use of the
equipment. If used for general medical equipment, please be sure to monitor the power status to
ensure that the power does not run out.
18.
When in use, power supply products will generate electromagnetic fields, which are likely
to affect the normal operation of medical implants or personal medical equipment such as
pacemakers, cochlear implants, hearing aids, debrillators etc. If these types of medical equipment
are being used, please contact the manufacturer to inquire about any restrictions on the use of
such equipment. These measures are fundamental to ensure a safe distance between the medical
implants (for example, pacemakers, cochlear implants, hearing aids, debrillators etc.) and this
product while in use.
19.
When the power supply is connected in normal mode to a refrigerator, power uctuations may
cause the power supply to automatically shut down. 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 efcent power consumption state.
Operation of this equipment in a residential environment could cause radio interference.
Disposal Guide
1. If conditions permit, make sure that the battery is fully discharged before disposing it in a
designated battery recycling bin. The product contains batteries with potentially dangerous
chemicals, so it is strictly prohibited to dispose of it in ordinary trash cans. For more details,
please follow the local laws and regulations on battery recycling and disposal.
2. If the battery cannot be fully discharged due to a product failure, please do not dispose of the
battery directly in the battery recycling box. In such case, you should contact a professional
battery recycling company for further processing.
3. Please dispose of over-discharged batteries that cannot be recharged.
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EcoFlow App
Control, monitor and customize your EcoFlow DELTA 2 from afar with the EcoFlow App.
Download here: https://download.ecoow.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 ofcial EcoFlow website at
https://www.ecoow.com/policy/terms-of-use
and
https://www.ecoow.com/policy/privacy-policy
What’s in the Box
AC Charging CableDELTA 2
DC5521 to DC5525 Cable User Manual & Warranty Card
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Car Charging Cable
Product Details
Overview
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❶
❷
❸
❹
❺
❾
❻
❿
❼
⓫
⓬
1.
LCD screen
2.
Bluetooth pairing
indicator
3.
USB-A output ports
4.
USB-C output ports
5.
Main power buutton
The type of AC socket varies in different countries or regions, the picture above is for
illustration only, please refer to the actual product.
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2
6.
USB-A fast charging output
ports
7.
USB power button
8.
Solar/car charging input port
9.
X-Stream charging input
port
10.
AC power button
11.
DC5521 output ports
12.
Car outlet
13.
Overload protection switch
14.
AC output sockets
15.
12V DC power button
⓭
⓮
⓯
1.
Ventilation Fan
2.
Extra Battery Port
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LCD Screen
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2
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6
1.
Remaining battery percentage
2.
Battery level indicator
3.
Remaining charging/discharging
time
4.
Extra battery indicator
5.
AC output
6.
USB-A output
7.
Battery failure warning
8.
High temperature warning
9.
Low temperature warning
10.
Fan indicator
11.
Input power
12.
Output power
13.
Overload warning
14.
State of charge
15.
Wi-Fi status
16.
12V DC output indicator
17.
USB-C output
Icon Name State
Remaining
battery
Wi-Fi
Charging: Rotating clockwise
Fully charged: 100%
Flat battery: Flashing
Solid: Internet connection succeeded
Off: Internet connection failed
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Refer to "Troubleshooting" for details.
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Power On/Off
Press the main power button once to turn on the product, then the LCD screen lights up and
the battery level indicator icon shows up; press and hold the main power button for at least 3
seconds to turn off the product.
1. After main power is 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 sleep mode with the LCD
screen shut 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.
Charging Your Devices
After the product has been 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.
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Short press AC power button Short press 12V DC power button
1.
Make sure that the total power of all loaded devices is lower than that of the rated
power.
2.
After the USB power button is turned on, the product will not shut off automatically.
3.
After the 12V DC output power button is turned on, the product will not shut off
automatically.
4.
After 12 hours without any load for the AC output ports, the AC power button will
shut down automatically.
Charging DELTA 2
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 conrming that there is no product failure, you can press the Overload Protection
Switch to resume charging.
Fully charged in 1.2hrs
≈
AC charging cable
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Solar Charging
You can also connect solar panels as shown in the diagram to recharge the product.
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 insufcient 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.
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Smart Extra Battery
A single DELTA 2 can connect up to 1 Smart Extra Battery for additional capacity. Refer to
the user manuals of the DELTA 2 Smart Extra Battery and Smart Generator for detailed
instructions.
1. Turn off both the Smart Extra Battery
and DELTA 2 before connecting or
disconnecting them.
2. Before using, make sure both DELTA 2
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 rst.
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.
Smart Generator
You can also recharge DELTA 2 with the Smart Generator. Please check the Smart Generator
manual for more information.
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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.
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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 conrm the power of the
appliances rst 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 rst, 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 (rstly 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.
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Troubleshooting
Indicator Problem
(Flashing)
(Flashing)
(Flashing)
(Flashing)
(Flashing)
(Flashing)
(Flashing)
(Flashing)
(Flashing)
(Flashing)
(Flashing)
(Flashing)
(Stays on)
USB-A Overload
Protection
USB-C Overload
Protection
High Temperature
Charging Protection
High Temperature
Discharging Protection
Low Temperature
Charging Protection
Low Temperature
Discharging Protection
AC Output
Overload Protection
AC High
Temperature Protection
AC Low
Temperature Protection
Fan Blockage
Car Charger
Overload Protection
Car Charger High
Temperature Protection
Battery Failure
Solution
Resume normal operation by removing
the electrical device connected to the
Resume normal operation by removing
the electrical device connected to the
Charging will resume automatically once
automatically once the battery cools down.
Charging will resume automatically once
battery temperature rises above 5°C (41°F).
automatically once the battery temperature
product. Electrical appliances should be
(Refer to X-Boost instructions to get more
Please confirm whether the fan inlet and
outlet are blocked, if not, normal operation
will be resumed automatically after the
automatically once the product is used at
optimum environmental temperatures.
Please check if the fan is blocked by
The product will resume normal operation
automatically after you remove the device
After the product cools down, it will resume
USB-A port.
USB-C port.
the battery cools down.
The power supply will resume
The power supply will resume
rises above -12°C (10°F).
Normal operation will resume
automatically once you remove the
overloaded device and restart the
used within rated power.
details about power limitations).
product temperature drops.
Normal operation will resume
foreign materials.
connected to the car charger.
normal operation automatically.
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.
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FCC Warning
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
Any changes or modications not expressly approved by the party responsible for compliance
could void the user's authority to operate the equipment.
Note:
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates
uses and can radiate radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning
the equipment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
- Consult the dealer or an experienced radio/TV technician for help.
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment.
This equipment should be installed and operated with minimum distance 20cm between the
radiator & your body.
IC Warning
This device complies with Industry Canada licence-exempt RSS standard(s).
Operation is subject to the following two conditions:
(1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause undesired
operation of the device.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio
exempts de licence. L'exploitation est autorisée aux deux conditions suivantes:
(1) l'appareil nedoit pas produire de brouillage, et
(2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le
brouillage est susceptible d'en compromettre le fonctionnement.
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du
Canada.
IC RF Statement:
When using the product, maintain a distance of 20cm from the body to ensure compliance with
RF exposure requirements.
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