EcoFlow DELTA 3 review

The EcoFlow DELTA 3 is the 1kWh pick for buyers who want room to grow. EcoFlow lists 1,024Wh of LFP capacity, 1,800W across six AC outlets with a 3,600W surge, and X-Boost for devices up to 2,200W. A 1,500W AC input fills it from empty in 56 minutes, and it also charges from 500W of solar, EcoFlow's 800W Alternator Charger or a Smart Generator. The main reason to choose it over the Anker SOLIX C1000 Gen 2 is expansion: it accepts DELTA 3, DELTA Pro 3, DELTA 2 and DELTA 2 Max extra batteries for up to 5kWh. EcoFlow also lists a 5-year warranty, 4,000 cycles to 80% capacity, an IP65 battery pack and a UPS switchover under 10 ms. At $579 on sale it costs about $0.57 per Wh and weighs 27.6 lbs, so it is a little pricier and heavier than the Anker. We compared documented features and published prices only.

Who it is for

Households that may add battery capacity later

Price

$579 on the EcoFlow US store (sale; regular $699).

DELTA 3 USD $579.00 $699.00 -$120.00
Quoted from the vendor pricing page on November 12, 2026.

Key features

• 1,024Wh capacity, 1,800W AC output across 6 outlets, 3,600W surge
• X-Boost runs devices up to 2,200W
• 1,500W AC input, 0 to 100% in 56 minutes
• Expandable up to 5kWh with DELTA 3, DELTA Pro 3, DELTA 2 or DELTA 2 Max extra batteries
• Under 10 ms UPS, 13 output ports and an IP65 battery pack

Strengths and weaknesses

• Strength: Only 1kWh-class unit here that expands to 5kWh
• Strength: 5-year warranty and 4,000 cycles to 80% capacity
• Strength: Runs under 30 dB below 600W, per EcoFlow
• Weakness: $579 is about $0.57 per Wh, more than the Anker SOLIX C1000 Gen 2 and BLUETTI AC180
• Weakness: 1,800W continuous output is lower than Anker's 2,000W
• Weakness: Solar input is 500W max, below Anker's 600W

Key facts

• Price: $579 (regular $699)
• Capacity: 1,024Wh
• AC output: 1,800W (3,600W surge)
• AC recharge: 0 to 100% in 56 min
• Solar input: 500W max
• Weight: 27.6 lbs
• Warranty: 5 years

Where it ranks

EcoFlow DELTA 3 is No. 3 in our Best Portable Power Stations verdict.