Ecoflow DELTA 3 Max Plus Portable Power Station + DELTA 3 Max Plus Extra Battery
Estimated Delivery Between
and .
Order within to get it by the earliest date.
Free Shipping In The USA | Call Us: 877-556-3347
Free Shipping In The USA | Call Us: 877-556-3347
Share it with us now and we will beat it. Get the best deal online, guaranteed!
and .
Order within to get it by the earliest date.
Build Your Perfect Off-Grid Rig With Our System Calculator
Visit CalculatorThe EcoFlow DELTA 3 Max Plus Portable Power Station + DELTA 3 Max Plus Extra Battery bundle delivers unmatched portable power capacity for home backup, off-grid living, and outdoor adventures. With a massive 4096Wh expandable capacity, 3000W AC output (3800W X-Boost), and ultra-fast recharging options, this setup ensures that you never run out of power when you need it most.
Paired with the DELTA 3 Max Plus Extra Battery, you can double your runtime, charge multiple heavy-duty appliances simultaneously, and enjoy true energy independence—all controllable through the EcoFlow App with real-time monitoring and smart power management.

Expandable Power Capacity – Combine the DELTA 3 Max Plus with the Extra Battery for a total capacity of 4096Wh, ideal for long-term power backup and extended trips.
Massive AC Output – 3000W continuous power with 3800W X-Boost lets you run 99% of essential home or outdoor devices.
Fast Dual Charging – Recharge via AC, solar (up to 1000W), or car input, cutting charge time dramatically.
Durable LiFePO₄ Battery – 3,000+ cycles to 80% capacity ensure long-lasting, safe, and stable energy storage.
Smart Control & Monitoring – Use the EcoFlow App via Wi-Fi or Bluetooth for complete real-time system management.
Seamless UPS Function – Provides <10ms switchover, keeping your home or work devices protected from interruptions.
Quiet, Safe, and Eco-Friendly – Zero emissions, low noise, and designed for both indoor and outdoor use.



Everything you need is included with your product.




| Specification | Details |
| Net Weight | 22.1+0.4kg |
| Dimensions (HWD) | 494mm×242mm×305mm |
| Rated Capacity | 2048Wh (51.2V 40Ah) |
| Battery Type | LiFePO₄ (LFP) |
| AC Output | 120V~60Hz, 3000W total (Surge 6000W), 20A×4 Max per port |
| X-Boost | 3800W |
| USB-A Output | USB-A(x1): 5V-3A/9V-2A/12V-1.5A, 18W Max |
| USB-C Output | USB-C(x1): 5/9/12/15V-3A, 20V/28V--5A, 140W Max(HID) | USB-C(x2): 5/9V/12V/15V-3A 20V-2.25A, 45W Max per port, total 45W |
| 12V DC Output Port | 12.6V-30A, 378W Total Anderson: 30A Max (Shared power with car cigarette lighter) |
| Cigarette Lighter Output Port | 12.6V-10A, 126W Total CAR:10A Max (Shared power with Anderson port) |
| AC Input (Charge Only) | 100-120V~15A 50/60Hz |
| Maximum PV Input Power(W) | 1000W |
| Optimal operating temperature | 20°C to 30°C (68°F to 86°F) |
| Charge Temperature | 0°C-45°C(32°F-113°F) |
| Discharge Temperature | -10 to 45°C(14°F-113°F) |
| Storage Temperature | -10 to 45°C(14°F-113°F) |
| Warranty | 5-Year Warranty | *Includes 3-year standard warranty and 2-year extended warranty available upon EcoFlow App registration. |
| Communication Method | Wi-Fi & Bluetooth |
| EMC | Class B |
| UPS | <10ms |
| Specification | Details |
| Battery Capacity | 2048Wh (51.2V 40Ah) |
| Net. Weight | Approx. 16 kg (35.3 lb) |
| Dimensions (H×W×D) | Approx. 494 × 239 × 196 mm (19.4 × 9.4× 7.7in.) |
| Extra Battery Port (Output) | 43.2V-57.6V⎓100A Max |
| Extra Battery Port (Input) | 43.2V-57.6V⎓48A Max |
| Rated Capacity | 2048Wh (51.2V⎓40Ah) |
| Cell Chemistry | LFP (LiFePO₄) |
| Protection Type | Over Voltage Protection, Overload Protection, Over Temperature Protection, Short Circuit Protection, Low Temperature Protection, Low Voltage Protection, Overcurrent Protection |
| Optimal Operating Temperature | 20°C-30°C (68°F-86°F) |
| Charge Temperature | 0°C-45°C (32°F-113°F) |
| Discharge Temperature | −10°C to 45°C (14°F-113°F) |
| Storage Temperature | −10°C to 45°C (14°F-113°F) |




Can I use both units together at the same time?
Yes, the DELTA 3 Max Plus and Extra Battery connect seamlessly, doubling your total capacity to 4096Wh for extended runtime.
How long does it take to recharge both units?
When connected, you can fully recharge both batteries using AC or solar input in just 2–3 hours, depending on conditions.
Can I expand even further?
Yes — the DELTA 3 Max Plus supports additional EcoFlow Smart Extra Batteries for even larger setups.
Does it support UPS functionality when paired with the extra battery?
Yes — the UPS feature remains active across both batteries, providing uninterrupted power (<10ms switch).
Can I monitor both units in the EcoFlow App?
Absolutely. The EcoFlow App displays real-time data for each connected unit, including input/output, temperature, and remaining runtime.
Shipping is FAST & FREE across the US. Read our full Shipping Policy here.
We offer market leading Easy 30 Day Returns. Read more about our Returns Policy here.
We get it. You've got a lot of choices when it comes to online retailers. Here's why we think you should shop with us at Off-Grid Source.
Trusted By 10,000+ Customers. See All Reviews.
I was a DIY solar power wannabe... that is 'til I connected with Manny... The man's a prince! He not only knows his stuff; he walked me through all things electrical. To make sure I had all I needed... he gave me his cell phone # to text him anytime I got confused... nights and weekends included. The prices were very competitive... definitely go with Manny -- you won't go wrong!
Bruce D.
I am always hesitant to buy things at places I have never shopped... I want to give a shout out to Manny who with great patience and knowledge helped me get my orders... I felt valued as a customer and I will definitely be back in the future. I highly recommend them, they make you feel like family.
Jennene A.
I'm about to go off grid. I called Manny, he walked me through everything so I could truly understand what I needed and never tried to upsell me. He was honest and made a customer for life.
Ray B.
I would personally like to thank Manny... I purchased the inverter and decided I needed to return it... Manny was very understanding and went out of his way to help me return the product and not even have to pay for shipping return. He gives this company reputation, honor and quality customer service!
Roger V.
I have been talking with Manny the owner... He has not only helped me design a system but he's been assisting with the install and components. I am super pleased so far with the assistance.
Jeff S.
We added 2 more batteries to our current set up. Pleased with the customer service from Off-Grid Source! Will be back!
Jason
Very fast response times. Very professional. I highly recommend!
Ray W.
Sign up for emails and get exclusive offers, new product drops, and expert advice to help you build the right solar setup with confidence.