1. Sarrera eta Overview
The EF ECOFLOW DELTA Pro 3 is a robust portable power station designed to provide reliable power for various applications, including home backup, camping, emergencies, RVs, and outdoor use. It features a 4096Wh LFP battery capacity, expandable up to 48kWh with additional batteries or smart generators. The unit supports 120V/240V voltage and offers a 4000W AC output, which can be boosted to 6000W with X-Boost technology, allowing it to power a wide range of essential appliances.
Key features include ultra-fast 10ms switch-over capability for uninterrupted power supply, X-Quiet technology for quiet operation (as low as 30 dB), and comprehensive control via the EcoFlow app. Its portable design with integrated handles and wheels ensures ease of transport and setup.

Image 1.1: The EF ECOFLOW DELTA Pro 3 Portable Power Station with an attached extra battery unit.
2. Zer dago kutxan
Upon unboxing your EF ECOFLOW DELTA Pro 3, please verify that all the following items are included:
- EcoFlow DELTA Pro 3 Unit x1
- Korronte alternoko kargatzeko kablea x1
- Grip Protector x2
- Product Document Bundle (User Manual, Warranty Card, etc.)
Video 2.1: An official EcoFlow video demonstrating the unboxing and quick onboarding process for the DELTA Pro 3, including its components.
3. Produktua amaitu daview
The DELTA Pro 3 is designed with user convenience and versatility in mind. It features a clear display and multiple ports for various power needs.
Aurrealdeko panela
The front panel provides essential information and common output ports:
- Bistaratzeko pantaila: Bateriaren maila, sarrera/irteerako potentzia erakusten ditutage, remaining runtime, and other operational statuses.
- USB-C Output Ports (100W): Two ports for fast charging compatible devices like laptops and smartphones.
- USB-A Fast Charge Output Ports: Two ports for quick charging of USB-A devices.
- 120V AC Outlets: Four standard AC outlets for powering household appliances.
- 240 V AC irteera: One high-power AC outlet for demanding appliances.
- 120V/240V 30A Outlet: One NEMA L14-30R outlet for RVs or heavy-duty equipment.

Image 3.1: The front panel of the DELTA Pro 3, highlighting its various output ports and digital display.
Atzeko panela
The rear panel houses charging input ports and extra battery connections:
- AC Input Socket: For charging the unit directly from a wall outlet using the provided AC charging cable.
- High-PV Input Port: For connecting high-voltage solar panels (up to 150V).
- Low-PV / Car Input Port: For connecting low-voltage solar panels (up to 60V) or car cigarette lighter chargers.
- Extra Battery Ports: Two ports for connecting additional DELTA Pro 3 Extra Batteries to expand capacity.
- AC Power IN/OUT Port: A versatile port for connecting to the EcoFlow Smart Home Panel 2 or for EV charging.
Alboko Panelak
The side panels offer additional connectivity and mobility features:
- 12V DC Output Ports: 12V-ko korronte zuzeneko gailuak elikatzeko.
- Andersonen irteera: A high-current DC output port.
- Ethernet ataka: For remote control and monitoring with compatible accessories.
- Wheels and Telescopic Handle: Unitatearen eramangarritasun erraza lortzeko.

3.2 irudia: Albokoa view of the DELTA Pro 3, showing its dimensions and integrated wheels for portability.
4. Konfigurazioa
The DELTA Pro 3 is designed for easy, plug-and-play setup. No complex installation or maintenance is required.
Hasierako konfigurazioa
- Unpack the DELTA Pro 3 unit and all accessories.
- Jarri unitatea gainazal lau eta egonkor batean.
- Ensure all port covers are securely closed when not in use to protect against dust and moisture.

Image 4.1: Visual guide demonstrating the simple plug-and-play setup of the DELTA Pro 3.
Connecting Extra Batteries
To expand the capacity of your DELTA Pro 3, connect additional DELTA Pro 3 Extra Batteries to the dedicated ports on the rear panel. Ensure the main unit is powered off before connecting or disconnecting extra batteries. Stacking should be done against a wall for stability.
Video 4.2: Official EcoFlow video demonstrating the connection of extra batteries to the DELTA Pro 3.
5. Funtzionamendu-argibideak
The DELTA Pro 3 offers flexible charging and discharging options to suit your power needs.
Charging the DELTA Pro 3
The DELTA Pro 3 can be charged using multiple methods:
- AC hormako entxufea: Use the provided AC charging cable to plug the unit into a standard wall outlet. The unit can charge from 0% to 80% in just 50 minutes using X-Stream technology.
- Eguzki panelak: Connect compatible solar panels to the High-PV or Low-PV/Car input ports. The unit supports dual-PV fast charging up to 2600W.
- Gas-sorgailua: Connect to a third-party gas generator or an EcoFlow Smart Generator 4000 (Dual Fuel) for industry-leading 3200W DC charging.
- EV Charging Piles: Utilize public EV charging piles for quick and efficient charging.
- Car Cigarette Lighter: Use your vehicle's built-in cigarette lighter port to charge on the go.
- EcoFlow Alternator Charger: Charge using a van's EcoFlow Alternator Charger.
- EcoFlow Smart Home Panel 2: Integrate with the Smart Home Panel 2 for automatic power management and charging up to 4kW.

Image 5.1: The DELTA Pro 3 demonstrating X-Stream fast charging from an AC wall outlet.
Discharging (Powering Devices)
Connect your devices to the appropriate output ports on the DELTA Pro 3. The unit can power almost everything with its 4000W AC output (6000W with X-Boost).
- X-Boost Mode: Automatically enables when connected devices exceed the rated output, allowing the unit to power appliances up to 6000W.
- X-Quiet Technology: Operates at a low noise level (as low as 30 dB), ensuring a peaceful environment.
- Eten gabeko elikadura-hornidura (UPS): Provides instant backup power with a 10ms switch-over time, protecting sensitive electronics from power disruptions.

Image 5.2: The DELTA Pro 3 powering kitchen appliances using its X-Boost feature.

Image 5.3: The DELTA Pro 3 operating silently in a bedroom environment.
EcoFlow App Control
Download the EcoFlow app to monitor, control, and customize your DELTA Pro 3 remotely.
- Monitorea: Get real-time energy insights on the go.
- Kontrola: Manage your power even from afar.
- Pertsonalizatu: Enhance battery lifespan and safety settings.
- Eguneratzea: Receive constant updates for an optimal user experience.
- Time of Use (TOU) Mode: Optimize energy usage by storing solar power during the day and low-cost grid energy at night, potentially saving over $1,800 a year.

Image 5.4: The EcoFlow app interface showing real-time monitoring and control features for the DELTA Pro 3.
6. Edukiera zabalgarria
The DELTA Pro 3's 4096Wh LFP battery capacity is highly expandable. You can increase its storage up to 48kWh by connecting additional DELTA Pro 3 Extra Batteries or EcoFlow Smart Generators. This modular design allows you to tailor your power solution to your specific needs, from short-term backup to extended whole-home power for 2-4 days.

Image 6.1: Visual representation of the DELTA Pro 3's expandable capacity, ranging from 4kWh to 48kWh with additional units.
7. Mantentzea
The EF ECOFLOW DELTA Pro 3 is built with automotive-grade LFP cells and IP65-rated CTC battery pack technology, designed to safeguard battery health and extend its lifespan. Regular maintenance is minimal, but it is recommended to:
- Mantendu unitatea garbi eta hautsik eta hondakinik gabe.
- Gorde leku fresko eta lehor batean, eguzki-argitik eta muturreko tenperaturatik urrun.
- Charge the unit to 80% every 3-6 months if not in regular use to maintain battery health.
- Ziurtatu aireztapen egokia funtzionatzerakoan, gehiegi berotzea saihesteko.
8. Arazoak
If you encounter any issues with your DELTA Pro 3, please refer to the following general troubleshooting steps:
- Unitatea ez da pizten: Ensure the battery is charged. Press and hold the main power button for a few seconds.
- Ez dago irteerarik AC/DC ataketatik: Ensure the specific AC/DC output button is pressed to activate the ports. Check the display for any error messages.
- Karga motela: Verify that the charging cable is securely connected. Check the EcoFlow app for charging speed settings (Fast/Adjust). Ensure solar panels are receiving adequate sunlight and are correctly connected.
- Gainkarga babesa: If an overload occurs, the unit will automatically shut down. Disconnect some appliances and restart the unit. Utilize X-Boost mode for higher wattagetxetresna elektrikoak.
- Aplikazioen konexio-arazoak: Ensure Bluetooth or Wi-Fi is enabled on your device and the DELTA Pro 3. Restart the app and the unit if necessary.
For more detailed troubleshooting or persistent issues, please consult the full user manual included in your product document bundle or contact EF ECOFLOW customer support.
9. Zehaztapenak
| Zehaztapena | Balioa |
|---|---|
| Marka | EF EKOFLOW |
| Ereduaren izena | EFD521+EB (DELTA Pro 3 + Extra Battery) |
| Wattage (Battery Capacity) | 4096 Watt-hours (4kWh) |
| AC Irteera | 4000W (6000W with X-Boost) |
| liburukiatage | 120V / 240V (AC) |
| Elementuaren pisua | 188 kilo |
| Elementuaren neurriak (L x W x H) | 16.16"L x 13.43"Z x 27.38"A |
| Erregai Mota | Non-gasoline (Battery) |
| Energia iturria | Solar Powered, AC, DC, EV Charging |
| Guztizko elektrizitate-hartuneak | 14 (mota desberdinak) |
| Switch-over Time | 10 ms (UPS function) |
| Zarata Maila | 30 dB bezain baxua |
10. Bermea eta Laguntza
The EF ECOFLOW DELTA Pro 3 comes with a 5 urteko fabrikatzailearen bermea, ensuring peace of mind and reliable performance. For any issues, technical support, or warranty claims, please refer to the contact information provided in your product document bundle or visit the official EF ECOFLOW webgunea.





