Description
EcoFlow DELTA 3 Ultra Plus – 3kWh Portable Power Station
The EcoFlow DELTA 3 Ultra Plus (3072Wh) delivers reliable, high-performance backup power for home use, extended outages, and off-grid applications. Built for stability, scalability, and long-term durability, it’s designed to power both sensitive electronics and demanding appliances with confidence.
3600W Output with 7200W Surge Power
With a 3600W rated output and 7200W surge capacity, the DELTA 3 Ultra Plus handles heavy loads with ease. X-Boost™ 3.0 supports devices up to 4600W, while a high-precision inverter samples voltage and current every 33 microseconds using a DSP chip to deliver a clean, pure sine wave—ideal for sensitive electronics.
Expandable 3–11kWh Capacity
Extend runtime from hours to multiple days by adding compatible EcoFlow Smart Extra Batteries. Depending on configuration, the system can support essential household loads during 4–10 hour outages, keeping refrigeration, heating systems, lighting, and communication devices running.*
*Requires specific battery configurations and the EcoFlow Smart Extra Battery Expansion Adapter (U.S. availability expected around January 2026).
Hybrid Backup with Smart Generator Support
When paired with an EcoFlow Smart Generator, the DELTA 3 Ultra Plus can automatically alternate between battery and fuel power, extending runtime during prolonged outages or off-grid use without manual intervention.
Flexible Home Integration
Supports two simple connection methods for partial-home or whole-home backup setups, allowing you to tailor the system to your power needs.
Six Charging Methods with Fast Recovery
Recharge the DELTA 3 Ultra Plus using multiple flexible input options:
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Wall AC
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Generator
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Solar
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Vehicle Alternator
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Solar + Generator
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Solar + Alternator
With up to 1800W AC input, the system can reach 0–80% in approximately 89 minutes. EcoFlow’s Storm Guard Mode monitors severe weather alerts and can automatically trigger remote AC charging so your power system is ready before outages occur.*
*Charging speed varies based on power source and conditions.
Built for Long-Term Reliability
Automotive-grade LiFePO₄ (LFP) cells and a rugged enclosure provide quiet operation and long service life, with dependable performance designed to last over 10 years. An advanced BMS powered by an ARM Cortex chipset monitors state of charge, health, and temperature in real time for enhanced protection.
Smart Monitoring & Control
A unified smart dashboard lets you monitor energy usage, solar input, battery status, estimated savings, and real-time electricity rates—making energy management simple and transparent.




What's in the Box

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0–80% charge in 48 minutes measured under optimal conditions using the EcoFlow Smart Generator 4000 (Dual Fuel) with Solar Panels; total input 3960W.
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DELTA 3 Ultra Plus (3072Wh) has an estimated lifespan of ~10 years under proper use; actual experience may vary.
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Backup time for multiple appliances is based on ideal conditions; results may differ.
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Requires connecting 1 × DELTA 3 Ultra Plus + 2 × DELTA 3 Max Plus Smart Extra Batteries using the EcoFlow Smart Extra Battery Expansion Adapter (adapter coming soon).
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Requires connecting 1 × DELTA 3 Ultra Plus + 2 × DELTA Pro 3 Smart Extra Batteries using the EcoFlow Smart Extra Battery Expansion Adapter (adapter coming soon).
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EcoFlow Smart Generators are sold separately.
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Manual Transfer Switch is sold separately.
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Some accessories must be purchased separately.
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Charging speeds are lab-tested by EcoFlow; actual results may vary depending on environment, device condition, and software version.
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Certain features require preset activation via the EcoFlow App.
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To enable specific features, connect DELTA 3 Ultra Plus (3072Wh) to the Smart Generator using the charging cable and activate via EcoFlow App (communication via Bluetooth/Wi-Fi).
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EcoFlow Solar Panels are sold separately.
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EcoFlow Alternator Charger Plus 1000 will be launched soon; sold separately.
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Compared with standard car cigarette port charging.
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EF Full-Tab LFP Cells have internal resistance of 1.5 mΩ, 25% lower than previous EF #C33 cells (2 mΩ).
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25% reduction in single-cell resistance leads to 25% less heat generation (Q = I²Rt).
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Unless noted, all data is from EcoFlow labs; actual results may vary with environment, device condition, or software version.
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Noise levels measured at 1m under 25°C: ≤25dB (600W) during charging/discharging.
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Product images, videos, and screen displays are for reference; actual appearance, color, size, and UI may differ.
Specifications
Net Weight: 33.7 ± 0.6 kg
Dimensions (H × W × D): 613.1 × 327.71 × 394.95 mm
Rated Capacity: 3072Wh, 51.2V, 60Ah
Cell Chemistry: LFP (LiFePO₄)
AC Output: 120V~60Hz, 3600W total (7200W surge); 20A ×4 max per port; 30A ×1 max per port
X-Boost: 4600W
USB-A Output: 5V-3A / 9V-2A / 12V-1.5A (18W max)
USB-C Output:
• 1 port: 5/9/12/15V-3A, 20V/28V-5A (140W max, HID)
• 2 ports: 5/9/12/15V-3A, 20V-2.25A (45W max each, total 45W)
12V DC Output: 12.6V-30A (378W total); Anderson port 30A max (shared with cigarette lighter)
Cigarette Lighter Port: 12.6V-10A (126W total); CAR port 10A max (shared with Anderson)
AC Input: 100–120V~15A, 50/60Hz
Max PV Input: 1600W
Optimal Operating Temperature: 20°C to 30°C (68°F to 86°F)
Charge Temperature: 0°C to 45°C (32°F to 113°F)
Discharge Temperature: −10°C to 45°C (14°F to 113°F)
Storage Temperature: −10°C to 45°C (14°F to 113°F)
Warranty: 5 years (3-year standard + 2-year extension via EcoFlow App registration)
Communication: Wi-Fi & Bluetooth
UPS Response Time: <10ms
Warrenty
Warranty Policy – King of Generators
At King of Generators, we are committed to ensuring you have a seamless experience with your purchase. Below is an overview of the EcoFlow warranty policy to help you understand coverage and how to make a warranty claim through King of Generators support.
Warranty Period Overview
EcoFlow provides a limited warranty on its products, starting from the date of purchase. The warranty period varies by product type:
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DELTA Series & RIVER Series: 1–5 years (depending on model)
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Solar Panels: 12 months to 10 years
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Accessories: 12 months
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Smart Generators: 1–3 years
For detailed coverage, refer to the product-specific warranty on EcoFlow’s official website or contact King of Generators support.
What’s Covered?
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Free repairs or replacements for defects in materials or workmanship
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Warranty extensions available for select products upon registration on EcoFlow’s website
What’s Not Covered?
The warranty does not cover:
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Damage due to misuse, unauthorized modifications, or external factors (e.g., water, weather)
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Products purchased from unauthorized sellers or without valid proof of purchase
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Products used outside the intended region or incompatible with local power standards
Note: EcoFlow products are designed for use in the U.S. Warranty claims for malfunctions due to use outside the country may not be covered.
How to Make a Warranty Claim
If you experience any issues, please contact King of Generators support to initiate a warranty claim.
📞 Phone: (855) 799-2943
📧 Email: info@kinggenerators.com
Our team will assist you with the claim process, including verifying your purchase, troubleshooting the issue, and coordinating with EcoFlow for repair or replacement.
Once approved, we will provide further instructions, including shipping details and estimated resolution time.
For any questions regarding warranty coverage, feel free to contact King of Generators support. We're here to help!


![6 Ways to Charge Up — Ready in Just 48 Mins <sup>[1]</sup>](https://us.ecoflow.com/cdn/shop/files/8-1-tuya.jpg?v=1758511749)