EcoFlow DELTA 2 Max + DELTA 2 Max Smart Extra Battery - D2M-US-EB

EcoFlow DELTA 2 Max + DELTA 2 Max Smart Extra Battery - D2M-US-EB

Now Available With DELTA 2 Max Smart Extra Battery - Double Or Triple The Runtime Of Your DELTA 2 Max With This Smart Extra Battery!

Features

• Fume-free, Quiet, Zero Maintenance

• World's Fastest Recharging Methods

• Power up to 99% of Appliances

• Lightest 2400W LFP Solar Generator on the Market

• LFP Battery: 3000 cycles, 6× more than the industry average. Use every day for 10 years

• Large Expandable Capacity from 2048Wh to 6144Wh

• Plug and play home backup power

• Quiet Recharging

• Customized In-app Energy Management

• Ultra-Fast Home Backup Switchover Speed

• Multiple Levels of Protection for Safety and Reliability

• Compatible with EcoFlow Ecosystem Products

• Power Through Extended Blackouts

• 5-Year Warranty

EcoFlow DELTA 2 Max Smart Extra Battery Features:

• Convenient recharging DELTA 2 Max and its Extra Battery charge and discharge in unison. Whether you’re recharging DELTA 2 Max from solar panels, AC outlets, a vehicle, or our Smart Generator, the DELTA 2 Max Extra Battery will recharge alongside.

• Independent in emergencies The extra battery even recharges directly from EcoFlow’s Smart Generator without DELTA 2 Max. That’s more recharging options to fit any situation.

• LCD screen Get all the info on battery percent, time until full, time until empty, and more on the DELTA 2 Max Extra Battery LCD screen. Check the battery’s status anywhere on the EcoFlow app.

No fumes, No noise, No maintenance.

• Fume-free: since power stations don't burn fuel, they don't produce emissions or fumes, making them a clean and eco-friendly alternative to gas generators.

• Quiet: without internal noisy combustion engines, DELTA 2 Max is extremely quiet, even when charging.

• Maintenance-free: There's no fuel to refill, no filters or fluids to change or mechanical parts that need constant maintenance.

World’s Fastest Recharging Methods

• Industry's Fastest AC Recharging: Get an input of up to 1800W with X-Stream technology. Charge 0-80% in 68 min (1.1 hour)

• Industry's Fastest AC + Solar Recharging: Charge to 80% in 43 min. Fully charge in about 1 hour.

• Harness Clean Solar Energy For Fast Charging:

• Fully charge with up to 1000W solar input in only 2.3 hours.

Power 99% of Essentials Industry-leading X-Boost Technology

A 2400W output powers up to 15 devices at once. Run some appliances with up to 3400W using X-Boost mode. That means during a power outage or blackout, you can continue to run your fridge, microwave, dryer, and more. Ideal power generator for backup power.

LFP Battery: 3000 cycles, 6× more than the industry average, for up to 10 years of everyday use

• Premium LFP cells for long-lasting battery life. Using the same chemical makeup as Tesla batteries, DELTA 2 Max gives you 3000 complete cycles till it's down to 80% capacity. That's 6× more than the industry average of 500.

• 10 years of everyday use. If used once a day, it can be safely used for about 10 years.

• Advanced BMS protection. Self-regulates voltage, current, and temperature. Charge safely with comprehensive protection.

• Safe and stable for high performance even in warm temperatures.

Customized In-app Energy Management

• Save more on electricity bills: Prioritize the use of solar energy via the EcoFlow app when using AC + solar dual charging. Starts and ends at any time you want to save energy bills by avoiding peak rates.

• Experience peace of mind during power outages AC Always On Mode: power button stays on, even during a power outage or after the grid power is back, keeping appliances powered. Adjust energy sources to fit your needs: backup power reserve or energy savings.

• Lower battery power reminder: Get a notification via the app when the battery hits a low.

Ultra-fast home backup switchover - <30ms EPS auto-switch

When a blackout occurs, the power station automatically switches to the battery supply mode in less than 30ms. It ensures a constant power supply to your devices.

Multiple levels of protection for safe and reliable use

• Made from safe, robust materials and a sturdy one-piece design. It can withstand severe knocks and falls. Each port is reinforced to be resistant to wear and tear.

• The modular electronic components fit together seamlessly and can be easily removed from the unit for maintenance. All wires are copper-plated and polymer-wrapped for enhanced cooling, safety, and strength.

• Rubber anti-slip base.

• A shell of the highest fire-resistant rating, 5VA. Comes with a strengthened handle.

• The EcoFlow service team provides a 5 year warranty. Experience absolute peace of mind.

Compatible with EcoFlow ecosystem products

DELTA 2 Max is compatible with EcoFlow’s product ecosystem, providing a one-stop power solution for users. With the most comprehensive product ecosystem in the industry, power a new world using DELTA 2 Max, Extra Batteries, Portable Solar Panels, WAVE and WAVE 2 Portable Air Conditioners, Smart Generator and so much more…

SpecificationsAdditional Information

What's In The Box

• DELTA 2 Max

• AC Charging Cable

• Car Charging Cable

• DC5521 to DC5525 Cable

• User manual & warranty card

• DELTA 2 Max Smart Extra Battery

• DELTA 2 Max Smart Extra Battery Cable

Product Manuals 

✓EcoFlow DELTA 2 Max User Manual

Videos

What our Experts Think

• Balanced Capacity & Output
  Base unit offers 2,048 Wh LFP battery with 2,400 W continuous AC output (up to ~4,800 W surge). Adding the Smart Extra Battery increases runtime for critical loads.

• Expandable up to ~6 kWh
  One extra battery brings total capacity to ~4,096 Wh; two extras give ~6,144 Wh — ideal for extended backup or off-grid use.

• Fast Recharge & Solar Compatible
  Supports up to ~1,000 W solar input plus AC charging, enabling rapid recharge under optimal conditions.

• Durable LFP Battery
  Lithium Iron Phosphate cells rated for ~3,000 cycles to 80% capacity, ensuring long life and thermal stability.

• Smart Control & Monitoring
  App-based WiFi/Bluetooth monitoring allows live metrics, energy management, and output control.

• Versatile Applications
  Perfect for emergency home backup (fridge, lights, routers), outdoor/mobile use (RV, camping), and powering tools or appliances.

Q&A

Q: What is the EcoFlow DELTA 2 Max + Smart Extra Battery bundle?
A: A complete power solution combining the DELTA 2 Max portable power station with a Smart Extra Battery, providing extended runtime for home, work, and outdoor use.

Q: What is the total energy capacity?
A: Together, they offer up to 4 kWh of energy, doubling the DELTA 2 Max’s standard capacity for long-duration operation of appliances, electronics, and tools.

Q: What are the main benefits?
A: Extended runtime, modular expandability, fast AC/DC/USB outputs, solar compatibility, and safe battery management, ideal for off-grid, emergency, or high-demand scenarios.

Q: Is the extra battery compatible with other devices?
A: It is designed specifically for DELTA 2 Max units, integrating seamlessly for extended performance.

Q: Where is it best used?
A: Perfect for home backup, RVs, camping, outdoor events, and emergency preparedness, offering reliable, clean, and portable energy wherever needed.

Maintenance Tips

• Regular Charging: Keep both batteries between 20%–80% charged to maximize lifespan; avoid prolonged full discharges.

• Store in Safe Conditions: Store in a cool, dry, and ventilated area (15°C–25°C / 59°F–77°F), away from direct sunlight, heat, or moisture.

• Clean Connections: Inspect input/output ports and battery terminals regularly; wipe with a soft, dry cloth to remove dust or debris.

• Firmware Updates: Keep both units updated via the EcoFlow app to maintain optimal performance and safety features.

• Monitor Physical Condition: Check for swelling, leaks, or external damage; discontinue use if any issues are detected.

• Safe Handling: Follow manufacturer guidelines when connecting, transporting, or storing batteries and the inverter to prevent damage or short circuits.

• Protect from Environment: Avoid extreme temperatures, water exposure, and high humidity to ensure efficiency and battery longevity.