EcoFlow DELTA 2: the specifications, checked and calculated
The best pick if you expect your needs to grow. Below is every published figure for the EcoFlow DELTA 2, each one linked to its source, plus runtime calculated from those figures with the arithmetic shown.
Check availability before you buy this one
EcoFlow appears to have replaced the DELTA 2 with the DELTA 3 line. As of 29 July 2026 the base DELTA 2 no longer appears in Amazon search results, though the DELTA 2 Max and the DELTA 2 expansion battery still do. The DELTA 3 carries the same 1,024 Wh capacity and 1,800 W inverter with a faster stated recharge. If you are buying new, compare the DELTA 3 before committing to a DELTA 2 from remaining stock.
Specifications
| Battery capacity | 1,024 Wh (expandable to 3,040 Wh) |
| Chemistry | LFP (LiFePO4) |
| AC inverter | 1,800 W continuous, 2,700 W surge, 2,400 W boost mode (resistive loads only) |
| Cycle life | 4,000 cycles to 80%+ capacity (see note) |
| Recharge | 0–80% in ~50 min; full in ~80 min |
| Max solar input | 500 W |
| Weight | 27 lb (12 kg) |
| Dimensions | 15.7 × 8.3 × 11.1 in (400 × 211 × 281 mm) |
| Outlets | 6× AC (1800W total), 2× USB-C, 2× USB-A fast charge (18W), 2× USB-A, 2× DC5521, 1× car port — 15 total |
| Warranty | 5 years |
What 1,024 Wh actually runs
Rated capacity is not usable capacity — the inverter takes a cut converting DC to AC. We work from ~870 Wh usable and divide by the real draw:
| Load | Draw | Calculated runtime |
|---|---|---|
| Full-size refrigerator (modern, Energy Star) | 150 W × 33% duty | 13 h |
| CPAP, no humidifier or heated hose | 30 W | 19 h |
| CPAP with humidifier + heated hose | 90 W | 8.3 h |
| Wi-Fi router + cable modem | 20 W | 25 h |
| Laptop (charging) | 60 W | 12 h |
| Box fan | 75 W | 9.7 h |
| Space heater (high setting) | 1500 W | 34 min |
These are calculated, not measured. Real results vary with temperature, battery age, and how hard the inverter is working. Treat them as a planning baseline, not a guarantee.
Details the spec sheet buries
- X-Boost raises the supported device draw to 2400 W, not 2200 W. It works by reducing voltage to resistive loads — great for a heater or kettle, not usable for anything with a motor or compressor.
Where the manufacturer contradicts itself
EcoFlow's marketing copy advertises "3000+ full charge and drain cycles", while the spec table on the same page states "4000 cycles to 80%+ capacity". We quote the spec table and flag the gap — at a cycle a week the difference is roughly 19 years vs 25, so it does not change the buying decision, but you should know the number is not consistent.
How it compares to the others we cover
| Unit | Capacity | Output | Weight | Cycle life |
|---|---|---|---|---|
| EcoFlow DELTA 2 (this page) | 1,024 Wh | 1,800 W | 27 lb | 4,000 cycles to 80%+ capacity |
| Jackery Explorer 1000 v2 | 1,070 Wh | 1,500 W | 24 lb | 4,000 cycles to 70%+ capacity |
| BLUETTI AC180 | 1,152 Wh | 1,800 W | 37 lb | 3,500+ cycles |
Full side-by-side on the home backup comparison, and the complete load-by-load numbers on our runtime reference.
Where to buy
We do not track prices — they move too fast for a static page to be honest about. Check the current price directly:
Check today's price on Amazon → Affiliate link — we may earn a commission at no extra cost to you. As an Amazon Associate I earn from qualifying purchases.Questions people actually ask
Will it run a full-size refrigerator?
Yes. A modern full-size fridge draws about 150 W while the compressor is running, and the compressor runs roughly a third of the time. Against ~870 Wh of usable capacity that calculates to about 13 h. Starting surge is the other half of the question: the 2,700 W surge rating covers a standard domestic fridge comfortably.
Can I recharge it from solar during an outage?
Yes — it accepts up to 500 W of solar input. In good sun that is roughly 2.7 hours to refill from empty, allowing for real-world panel losses. Note that "good sun" is doing a lot of work in that sentence: panel output falls sharply with cloud, angle and heat.
Will it run a space heater or an air conditioner?
A 1,500 W space heater is right at the edge of the 1,800 W inverter, and it would flatten the battery in well under an hour. Resistive heating is the worst possible use of stored battery capacity. A window air conditioner is more realistic on paper, but the compressor surge is the deciding factor.
How current are these figures?
Every specification on this page was checked against the manufacturer's own documentation on 2026-07-29, and the sources are linked at the foot of the page so you can confirm them yourself. Manufacturers revise specs quietly and retailers copy old figures for years, so if you spot a discrepancy between this page and the source we cited, tell us and we will correct and re-date it.
Sources
- EcoFlow — DELTA 2 official spec sheet — read 2026-07-29