EcoFlow River Max EF4 Portable Power Station – 288Wh/576Wh, 600W Output

Overview:

• Model: EcoFlow River Max (EF4)
• Modular portable power station with 288Wh base capacity, expandable to 576Wh 
• Delivers 600W continuous / 1200W surge output
• Designed for outdoor, emergency, and mobile power applications

Key Features:

• Dual Battery Design: Detachable expansion battery doubles capacity for longer runtime
• Fast Charging: AC input up to 250W; recharges 0–80% in about 1 hour
• Multiple Outputs:
  • 3 × AC outlets (120V, 600W total)
  • 1 × USB-C (100W PD)
  • 2 × USB-A (12W each)
  • 1 × USB-A Fast Charge (up to 28W)
  • 1 × 12V DC car port (136W max)
• Solar Ready: Supports 10–25V input up to 200W for off-grid charging
• LCD Display: Shows input/output wattage, battery level, and estimated runtime
• Integrated LED Flashlight with on/off control
• Lightweight & Portable: Easy-carry handle with compact form factor
• Operating Range: Discharge −4°F to 140°F; Charge 32°F to 113°F
• Battery Chemistry: Lithium-ion (NCM) rated for hundreds of cycles

Condition:

• Good condition overall, fully functional, tested
• Minor surface wear from normal use and storage
• No cracks or structural damage; ports and display in working order
• Includes power cord and car charging cable as shown

Specifications:

• Capacity: 288Wh (576Wh with expansion)
• Output: 600W continuous, 1200W surge
• Weight: approx. 11 lbs (5 kg)
• Dimensions: approx. 11.3 × 7.3 × 7.7 inches