EF ECOFLOW

EF ECOFLOW 4096Wh Delta Pro 3 Power Station With 3200W Dual Fuel Generator GE305 Portable Backup Generator for

173+ bought in the past month

$3399.00$5498.00

About this item

  • [Important Notice] Due to local regulations, this product is NOT CARB-approved. Cannot be shipped to California.
  • [Forget Refueling] Featuring a 4000Wh LFP battery capacity, expandable to 48kWh with extra batteries or smart generators, providing 2-4 days of whole-home backup power. With 7 unique and 18 combo charging methods like AC wall outlets, solar panels, gas generators, EV charging piles, or the EcoFlow Smart Home Panel 2, you can forget fuel worries.
  • [Dual Fuel, Double Assurance] With LPG and gasoline, this dual fuel generator ensures quick access to backup power, alleviating concerns about fuel shortages during emergencies. Easily connect a 20 lb propane tank for up to 24kWh of power. The smart engine produces 8kWh from a single gasoline tank, providing 8 hours of power for home appliances at 25% load.
  • [Reliability Lasts Longer] Utilize the EcoFlow app for real-time alerts, including CO concentration, high & low-temperature warnings, engine oil alerts, and overload alerts. All features trigger automatic shutdowns for enhanced safety (excluding fuel alerts). Enjoy a longer 3-year warranty period for peace of mind in both use and purchase.
  • To ensure prompt delivery, please note that the DELTA Pro 3 Solar Generator and the Dual Fuel Generator will be shipped separately. If you receive one item before the other, kindly await the arrival of the remaining item.
$3399.00
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Product details

BrandEF ECOFLOW
Wattage4096 Watt-hours
Fuel TypeElectric
Power SourceAC
Recommended Uses For ProductCamping, Residential
Item Weight115 Pounds
Voltage240 Volts (AC)
Output Wattage4000
Special FeaturePortable
Included ComponentsDELTA Pro 3, Dual Fuel Generator

Technical specifications

brandEF ECOFLOW
wattage4096 Watt-hours
fuel_typeElectric
power_sourceAC
recommended_uses_for_productCamping, Residential
item_weight115 pounds
voltage240 Volts (AC)
output_wattage4000
special_featurePortable
included_componentsDELTA Pro 3, Dual Fuel Generator
colorGrey
product_dimensions16.16"L x 13.43"W x 27.38"H
materialSteel, Aluminum, Cast Iron
model_nameportable generator
engine_type2 Stroke
ignition_system_typeElectric start
tank_volume4 Liters
total_power_outlets6
engine_power_maximum1900 Watts
starting_wattage1900 Watts
upc842783153258
manufacturerEcoFlow
item_model_numberEFD521-GE305
best_sellers_rank#134,399 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #38 in Power Take Off Generators #450 in Outdoor Generators

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Customer reviews

4.263 ratings

Customers say

Customers find the generator's dual fuel option genius and appreciate its power output, with one mentioning it can power all home appliances.

★★★★★

My New Best Friend During Blackouts: The EcoFlow Smart Generator 4000 (Dual Fuel)

EmanonJanuary 5, 2026

Let me start by saying: I never thought I’d be the type to get excited about a generator. I mean, generators are supposed to be loud, smelly, pull-start nightmares that make you feel like you’re wrestling a lawnmower on steroids. But this EcoFlow 3200W DC Fast Charging Dual Fuel Smart Generator? It’s like the Tesla of generators – smart, efficient, and it doesn’t make me hate my life when I use it. I bought this to pair with my DELTA Pro 3 for home backup after a brutal storm last year left us in the dark for three days. My freezer turned into a swamp, and I lost a month’s worth of meal-prep chicken. Never again. First off, the dual fuel option is genius. Gasoline or LPG (propane)? Yes, please. I hooked it up to a 20lb propane tank (the kind you already have for your grill), and it runs cleaner, quieter, and way longer. EcoFlow claims up to 40% better fuel efficiency when charging the DELTA Pro 3, and honestly, it delivers. I charged my fully depleted DELTA Pro 3 way faster than I expected, with way less fuel burned than my old clunky gas generator ever managed. Plus, in a real emergency, if gas stations are down, propane is easier to stockpile without it going bad. The smart features are where this thing shines and earns its “smart” name. App control via Bluetooth/WiFi – I can start it, stop it, monitor fuel levels, and get alerts from my phone while sipping coffee inside. No more running out in the rain to check if it’s still chugging. It auto-starts when the battery hits your set low threshold and shuts off when full. During a recent outage, it kicked on seamlessly, kept the fridge, lights, WiFi (priorities!), and even my CPAP running without me lifting a finger. And the electric start? One button – no yanking a cord like a caveman. It’s not whisper-quiet (around 70dB at full load, like a vacuum cleaner from 7 meters away), but way quieter than traditional generators, and the auto-shutoff means it doesn’t drone on forever. Safety features are top-notch: CO detector, overload protection, low oil shutdown – all with app alerts. Peace of mind in a box. Downsides? It’s heavy (about 83 lbs), so not “portable” for everyone, but the handles help. And no CARB approval, so sorry California folks. Pricey upfront, but compared to losing a freezer full of food or hotel bills during outages, it’s a bargain. If you’re building an EcoFlow ecosystem with DELTA Pro 3 or Pro, this is the perfect sidekick. Reliable, efficient, and honestly fun to use (who says that about a generator?). 5 stars – highly recommend. My freezer thanks you, EcoFlow. Read more

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★★★★★

Works great and easy to set up. Fantastic tech support!

CBurdenDecember 26, 2025

Arrived within 3 days of ordering during the holidays. Excellent packaging shipped well considering its weight. Unfortunately I had to use it just three days or receiving it and their technical support was great and helped me easily set it up. I love the dual fuel option! The quality of the product is very sturdy and runs much quieter than I expected. Read more

★★★★★

Ecoflow Honored Warranty

TimmyJuly 7, 2025

The generator stopped working after about a month and roughly 5 hours of testing using propane. I tried several troubleshooting steps, including changing the oil, cleaning the filter, checking for updates, inspecting the battery and terminals, replacing the spark plug, and switching to gas to rule out issues with my propane line. Despite these efforts, nothing resolved the problem. I contacted EcoFlow, and they asked me to send videos and describe what I had already tried. After I provided the information, they requested that I return the unit. I’ve sent it back and am now waiting for a replacement. EcoFlow has provided excellent service by standing behind their product. The new unit was dispatched today, and I hope it continues to work smoothly. 🤞🏾 Read more

Review image 1
★☆☆☆☆

Dead in less than a year. No support available

EARDecember 22, 2025

Overall the unit is well built. When it works, it's great. Mine has been around for about a year now. The issues start small. At first it will not accurately read the fuel level. It produces random numbers from zero to 90 even when the tank is full. Sometimes it takes some retries to get it start with or without the app. Right now, to gen is reading low bus voltage and won't provide any power. Getting support from Ecoflow feels impossible. I've tried several means to get support and nothing. So if you plan to buy this unit, think hard and long before committing to a non-responsive customer service. Other than that, enjoy the generator few few months before it turns into an expensive brick Read more

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