Quick answer
The EcoFlow Delta 3 carries the exact same 1,024Wh LiFePO4 capacity and 1,800W continuous AC output as the two-year-old Delta 2, so the “3” in the name isn’t a capacity bump. What actually improved: EcoFlow rates the Delta 3’s cells for about 4,000 cycles to 80% capacity, up from the Delta 2’s roughly 3,000, and lists a 3,600W surge rating for motor-driven loads versus the Delta 2’s 2,700W X-Boost ceiling, per EcoFlow’s own published specs. It typically sells for $629 (list $699) — the same or less than the Delta 2’s usual price for a longer-lived, higher-surge unit.
We’ve referenced the Delta 2 across dozens of comparisons on this site as one of the strongest 1kWh-class units available. The Delta 3 replaces it in EcoFlow’s current lineup, but the spec sheet tells a narrower story than the name suggests — this review breaks down exactly what changed, what didn’t, and whether upgrading (or buying fresh) makes sense.
At a glance
| Spec | EcoFlow Delta 3 | EcoFlow Delta 2 |
|---|---|---|
| Capacity | 1,024Wh LiFePO4 | 1,024Wh LiFePO4 |
| AC output | 1,800W continuous, 3,600W surge | 1,800W continuous, 2,700W X-Boost |
| Recharge (wall) | ~56 min, 0-100% | ~50 min, 0-80% only |
| Cycle life | ~4,000 cycles to 80% capacity | ~3,000 cycles to 80% capacity |
| Warranty | 5 years | 5 years |
| Weight | ~27.6 lb | ~27 lb |
| Price | ~$629 (list $699) | ~$699 |
What we like
- Longer rated cycle life. About 4,000 cycles to 80% capacity versus the Delta 2’s roughly 3,000 works out to noticeably more years of daily-driver use before the battery meaningfully fades — see our full breakdown of what cycle ratings actually mean for the math.
- A real surge number, not just X-Boost. The 3,600W surge rating gives more headroom for motor-driven loads — well pumps, power tools, mini fridges — that spike hard on startup, per our continuous-vs-surge breakdown. Resistive loads like space heaters still lean on X-Boost the way they did on the Delta 2.
- The recharge number is honest. EcoFlow’s 56-minute figure for the Delta 3 is a genuine 0-100% charge, while the Delta 2’s headline 50-minute number stops at 80% — the real-world gap between the two is smaller than the raw minutes suggest, and arguably favors the newer unit.
- Same or lower price. At roughly $629, the Delta 3 typically undercuts the Delta 2’s usual $699 street price for a unit with a longer-rated battery and more surge headroom.
Where it falls short
- No capacity increase. If you were hoping “Delta 3” meant more watt-hours than the Delta 2, it doesn’t — both hold exactly 1,024Wh. The name trap continues one tier up, too: the Delta 3 Plus is also 1,024Wh — the real jump needs the Delta 3 Max Plus (2,048Wh) or Delta 3 Ultra Plus (3,072Wh), different products entirely.
- Single 500W solar MPPT input on the base unit. The Delta 3 Plus doubles this to two 500W ports for faster solar charging; the base Delta 3 keeps the single-port limit the Delta 2 also had.
- The upgrades are real but incremental. Existing Delta 2 owners have little reason to replace a working unit — the gains (cycle life, surge, honest recharge math) matter most to first-time buyers choosing between the two, not to people already holding a Delta 2.
Who should buy it
The Delta 3 is the better buy for anyone shopping fresh in the 1kWh class: same capacity as the Delta 2 for the same or less money, plus a longer-rated battery and more surge headroom for motor-driven appliances. If you already own a working Delta 2, there’s no capacity-based reason to upgrade — put that money toward an add-on battery or a second unit instead. If you need more than 1,024Wh from the same product line, look at the Delta 3 Plus rather than expecting the base Delta 3 to stretch further. For a wider view of how it stacks up against Anker SOLIX, Jackery, and Bluetti’s 1kWh-class units, see our EcoFlow vs Anker SOLIX and EcoFlow vs Bluetti comparisons. If faster solar charging or a higher expansion ceiling matters more to you than price, see our Delta 3 Plus review for exactly what the extra money buys.
EcoFlow Delta 3 (1,024Wh)
- 1,800W continuous AC output with a 3,600W surge rating for motor-driven loads.
- True 0-100% wall recharge in about 56 minutes — no asterisk to an 80% cutoff.
- ~4,000-cycle LiFePO4 pack to 80% capacity; 5-year warranty.
Solar panels, extra battery packs, and spare cables shipped free in two days — try Amazon Prime free for 30 days.
The bottom line
The EcoFlow Delta 3 is a genuine, if narrow, upgrade over the Delta 2 — not through more watt-hours, but through a longer-rated battery, a real surge number, and an honest full-charge time, all at the same or a lower price. It’s the right pick for anyone buying a 1kWh-class EcoFlow fresh in 2026; existing Delta 2 owners can safely sit this generation out. See our full portable power station rankings for how it compares against every class of unit, or our EcoFlow Delta Pro review if you need to step up beyond 1kWh entirely.