EcoFlow DELTA 3 Ultra Plus Review: A Spec-Based Look
As an Amazon Associate I earn from qualifying purchases. Read our affiliate disclosure.
At a glance
Best for 3600 W outputEcoFlow DELTA 3 Ultra PlusCheck price on Amazon
The EcoFlow DELTA 3 Ultra Plus is worth a look for home backup buyers who want about 3 kWh and 3,600 W, in one unit that can grow to 11 kWh. It gives 3,600 W of AC output and 1,600 W of solar input.
The maker’s published specs, current in November 2026, sit behind this review. PowerPicked Editorial did not run tests on the DELTA 3 Ultra Plus.
What does the DELTA 3 Ultra Plus offer?
About 3 kWh and 3,600 W in one unit that can grow to 11 kWh is what this station gives home backup buyers. It holds 3,072 Wh, gives 3,600 W of AC output, lists 1,600 W of solar input, and weighs 74.3 lb.
EcoFlow DELTA 3 Ultra Plus
- Capacity
- 3,072 Wh
- AC output
- 3,600 W
- Solar input
- 1,600 W
- Weight
- 74.3 lb
Who it's for: Home backup buyers who want about 3 kWh and 3,600 W in one unit that can grow to 11 kWh.
Strengths
- 3,600 W output with a 7,200 W surge rating
- 1,600 W solar input
- Listed at 25 dB or less at 600 W
Weaknesses
- Heavy at about 74.3 lb
- Full 5-year warranty needs app registration
It gives 3,600 W of output, with a 7,200 W surge rating. Solar input is 1,600 W. Noise is 25 dB or less at 600 W. At about 74.3 lb, it is heavy. App registration is needed for the full 5-year warranty.
Wh is short for watt-hour. It counts stored energy. W is short for watt. It counts power. AC output powers things that plug in. Solar input is the top power a station can take from panels.
Its battery is LFP, or LiFePO4, with 3,072 Wh at 51.2 V and 60 Ah. AC output is 120 V, with 3,600 W total and a 7,200 W surge. X-Boost runs resistive appliances up to 4,600 W. It gives four 20 A outlets and one 30 A outlet. Other outputs are a 140 W USB-C port, two 45 W USB-C ports, an 18 W USB-A port, a 126 W 12 V car port, and a 30 A Anderson port.
Solar input reaches up to 1,600 W. With solar plus generator dual charging, it reaches 0 to 80% in about 48 minutes. UPS switchover takes under 10 ms. It runs at 25 dB or less at 600 W. It expands from 3 to 11 kWh with extra batteries. It connects to a home through a manual transfer switch or an inlet box.
It charges from 32°F to 113°F and discharges from 14°F to 113°F. It measures 24.1 by 12.9 by 15.5 inches. The app connects through Wi-Fi and Bluetooth. The warranty is 3 years standard, plus 2 years extended after EcoFlow app registration, up to 5 years.
The figures in this part assume 85% of the listed capacity. Usable energy is about 2,611.2 Wh, from 3,072 Wh times 0.85. A 100 W load runs for about 26.1 hours on that amount. The DELTA 3 Ultra Plus holds about 41.3 Wh for each pound, from 3,072 Wh over 74.3 lb.
How does the DELTA 3 Ultra Plus compare?
| Spec | EcoFlow DELTA 3 Ultra Plus | BLUETTI Elite 300 | Anker SOLIX F3800 Plus |
|---|---|---|---|
| Capacity | 3,072 Wh | 3,014 Wh | 3,840 Wh |
| AC output | 3,600 W | 2,400 W | 6,000 W |
| Solar input | 1,600 W | 1,200 W | 3,200 W |
| Weight | 74.3 lb | 58 lb | 136.7 lb |
The DELTA 3 Ultra Plus holds more energy than the Elite 300, at 3,072 Wh against 3,014 Wh, and less than the F3800 Plus, at 3,840 Wh. It gives more AC output than the Elite 300, at 3,600 W against 2,400 W, and less than the F3800 Plus, at 6,000 W. Its solar input sits between the two, at 1,600 W against 1,200 W and 3,200 W. Its weight sits between the two, at 74.3 lb against 58 lb and 136.7 lb.
How to choose
First, weigh AC output. The DELTA 3 Ultra Plus gives 3,600 W, while the Elite 300 gives 2,400 W and the F3800 Plus gives 6,000 W. Pick the DELTA 3 Ultra Plus if a device needs more than 2,400 W and you want a lighter station than the F3800 Plus.
Second, weigh expansion. The DELTA 3 Ultra Plus expands from 3 to 11 kWh with extra batteries. The Elite 300 cannot add batteries. Pick the DELTA 3 Ultra Plus if you plan to add batteries later.
Third, weigh carry weight. The DELTA 3 Ultra Plus weighs 74.3 lb, while the Elite 300 weighs 58 lb and the F3800 Plus weighs 136.7 lb. Pick the Elite 300 if you will move the station by hand.
FAQ
How much AC output does the DELTA 3 Ultra Plus give?
It gives 3,600 W of AC output, with a 7,200 W surge rating. X-Boost lifts resistive appliances to 4,600 W.
How much solar input does the DELTA 3 Ultra Plus list?
It lists 1,600 W of solar input.
How much can the DELTA 3 Ultra Plus expand?
It can expand from 3 to 11 kWh with extra batteries.
How heavy is the DELTA 3 Ultra Plus?
It weighs 74.3 lb. That is heavier than the BLUETTI Elite 300 at 58 lb and lighter than the Anker SOLIX F3800 Plus at 136.7 lb.
