1. Introdución
The EF ECOFLOW DELTA 3 Classic is a portable power station designed to provide reliable power for various applications, including home backup, outdoor activities, and emergency situations. It features a 1024Wh LiFePO4 battery, 1800W AC output (expandable to 2600W with X-Boost), and multiple charging options. This manual provides essential information for the safe and efficient operation of your device.
2. Instrucións de seguridade
Please read and understand all safety instructions before using the DELTA 3 Classic. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Non desmonte, repare nin modifique a unidade.
- Manteña a unidade lonxe de fontes de calor, luz solar directa e materiais inflamables.
- Evite a exposición á auga ou a outros líquidos.
- Asegúrese de que haxa unha ventilación axeitada durante o uso e a carga.
- Do not use the unit if it is damaged or appears to be malfunctioning.
- Manter fóra do alcance dos nenos e animais.
3. Produto rematadoview
Familiarize yourself with the components of your DELTA 3 Classic portable power station.

Figura 3.1: Fronte view of the DELTA 3 Classic Portable Power Station.
Portos e controis
The DELTA 3 Classic features multiple input and output ports for versatile connectivity.

Figura 3.2: Máisview of the 6 versatile output ports, including USB-C, USB-A, and AC outlets.
- Portos de saída de CA: 3 x AC outlets, providing up to 1800W total.
- Portos USB-C: 1 x 100W Max USB-C, 1 x 30W Max USB-C.
- Porto USB-A: 1 x 18W Max USB-A.
- Pantalla de visualización: Shows battery level, input/output power, and other status indicators.
- Botón de encendido: Para acender e apagar a unidade.
4. Configuración
Carga inicial
Before first use, fully charge the DELTA 3 Classic. The X-Stream AC charging technology allows for rapid charging.
- Connect the AC charging cable to the unit's AC input port and then to a wall outlet.
- The display will indicate charging status. The unit can charge from 0% to 80% in approximately 45 minutes.
Conectando Dispositivos
Once charged, you can connect your devices to the appropriate output ports.
- For AC appliances, plug them into the AC output ports.
- For USB devices, use the USB-A or USB-C ports.
5. Instrucións de funcionamento
Activando/Desactivando
Press and hold the main power button to turn the unit on or off. The display screen will illuminate upon activation.
AC Output Usage
The DELTA 3 Classic provides 1800W AC output, with an X-Boost feature that can support devices up to 2600W. This allows it to power a wide range of appliances, including refrigerators, microwaves, and laptops.

Figure 5.1: The DELTA 3 Classic providing power for various scenarios, highlighting its 1800W AC output and X-Boost capability up to 2600W.
Opcións de carga
The DELTA 3 Classic offers multiple ways to recharge its battery.

Figure 5.2: The four versatile charging options for the DELTA 3 Classic: AC recharging (45 min to 80%), Solar Charging (1.8 hr to 80% with 500W solar input), Generator Charging (45 min to 80%), and Alternator Charger (1.8 hr to 80% with EcoFlow 500W Alternator Charger).
- Carga de CA: Connect to a standard wall outlet for fast charging.
- Carga solar: Connect compatible solar panels (optional) for renewable energy charging. With 500W solar input, it can charge in approximately 2.5 hours.
- Carga do coche: Usa o cable do cargador do coche para cargalo desde a toma de 12 V do teu vehículo.
- Carga do xerador: Can be recharged using a generator.
Función de alimentación ininterrumpida (UPS).
The DELTA 3 Classic features an Uninterruptible Power Supply (UPS) function to protect sensitive electronics. In the event of a power outage, it automatically switches to battery power in less than 10 milliseconds, preventing data loss and interruptions for devices like PCs, servers, and medical equipment.

Figure 5.3: The DELTA 3 Classic providing seamless power with its 10ms auto-switch UPS function, ensuring zero interruptions for critical devices.
EcoFlow App Control
Manage and monitor your DELTA 3 Classic remotely using the EcoFlow app. The app allows you to monitor energy usage, set charging schedules, and activate backup modes like storm alerts or self-power mode.

Figure 5.4: The EcoFlow app providing deeper insights and easier control, allowing users to monitor energy usage, set scheduled tasks, and manage backup modes.
6. Mantemento
Coidado da batería
The DELTA 3 Classic uses LiFePO4 battery cells, designed for over 10 years of daily use. To maximize battery lifespan:
- Evite descargar completamente a batería con frecuencia.
- Almacene a unidade nun lugar fresco e seco cando non estea en uso.
- Recharge the unit to 80% every 3-6 months if stored for extended periods.
Limpeza
Usa un pano seco e suave para limpar o exterior da unidade. Non empregues produtos químicos agresivos nin materiais abrasivos.
7 Solución de problemas
If you encounter issues with your DELTA 3 Classic, refer to the following common problems and solutions.
- A unidade non se acende: Asegúrate de que a batería estea cargada. Mantén premido o botón de acendido/apagado durante uns segundos.
- Sen saída dos portos: Check if the specific output (AC/DC/USB) is enabled. Verify the device connected is within the power station's output limits.
- Carga lenta: Ensure the charging cable is securely connected. Check the power source for adequate output. For solar charging, ensure panels are in direct sunlight and clean.
- Aviso de sobrecarga: Disconnect some devices to reduce the load. The unit will automatically recover once the overload is removed.
For further assistance, contact EF ECOFLOW customer support.
8. Especificacións
| Característica | Especificación |
|---|---|
| Marca | EF ECOFLOW |
| Nome do modelo | DELTA 3 Clásico |
| Número de modelo do produto | EF-DL3-C |
| Tipo de batería | LiFePO4 |
| Capacidade | 1024 Wh |
| Saída AC | 1800W (3600W Surge), X-Boost up to 2600W |
| Saída USB-C | 1 x 100W Max, 1 x 30W Max |
| Saída USB-A | 1 x 18 W máx |
| Tempo de carga (AC) | 0-80 % en 45 minutos |
| Entrada de carga solar | Up to 500W (charges in approx. 2.5 hours) |
| Función UPS | Cambio automático de <10 ms |
| Dimensións | 20.07 x 28.19 x 39.88 cm |
| Peso | 15 kg (33 lb) |
| Material | Metal (frame/housing), Plastic/Rubber (insulation), LiFePO4 (battery) |
| Usos recomendados | Camping, Home, Commercial |
9. Garantía e soporte
The EF ECOFLOW DELTA 3 Classic comes with a manufacturer's warranty. For detailed warranty information, please refer to the warranty card included with your product or visit the official EF ECOFLOW websitio.
For technical support, troubleshooting assistance, or spare parts, please contact EF ECOFLOW customer service through their official channels. Ensure you have your product model number (EF-DL3-C) and purchase details ready when contacting support.