Specifications checked against manufacturer pages on 2026-08-23.
The EcoFlow DELTA 2 (1,024 Wh, 1,800 W) and the Jackery Explorer 1000 v2 (1,070 Wh, 1,500 W), compared on the figures their makers publish. On the normalized ratios, the DELTA 2 recharges at a higher rate (12.8 Wh/min vs 11.3 Wh/min); the Explorer 1000 v2 carries more per pound (45.0 Wh/lb vs 37.9 Wh/lb).
In short. The Explorer 1000 v2 leads on watt-hours per pound (45.0 Wh/lb vs 37.9 Wh/lb) and surge headroom (2.00× vs 1.50×). The DELTA 2 leads on recharge rate (12.8 Wh/min vs 11.3 Wh/min). 3 of 6 measures tie or are not comparable. Note that the DELTA 2 has left the manufacturer’s catalog; see the catalog note below.
Check the current price
Links go to the exact base unit we compared, not a bundle. Amazon prices change daily.
We do not link the DELTA 2: we could not confirm a listing for the exact base unit, and we do not link a guess.
Catalog status, checked 2026-08-23. The EcoFlow DELTA 2’s store listing on the manufacturer’s site now redirects to a newer model, and the unit no longer appears in the manufacturer’s product-series catalog. It has been superseded by the EcoFlow DELTA 3. Its marketing page, with the spec tab we read the figures from, was still online when checked. Retailers may still sell remaining stock. That changes the question from “which is better” to “is a lower price worth buying a model the maker has moved on from” — see Buying a superseded model below.
Specifications, side by side
Numbered notes below the table give the source location or a caveat for figures that need one; check marks
mark the better figure where one can be judged; “Manufacturer does not state” means absent from that maker’s page as of
its check date listed under Sources. UPS switchover is how long the outlets go dark when grid power drops.
| Specification | EcoFlow DELTA 2 | Jackery Explorer 1000 v2 |
|---|---|---|
| Rated capacity | 1,024 Wh | 1,070 Wh ✓ |
| Usable capacity (calculated)* | 870–922 Wh | 910–963 Wh |
| Continuous AC output | 1,800 W ✓ | 1,500 W |
| Surge output | 2,700 W1 | 3,000 W ✓ |
| Full recharge from wall | 80 min2 ✓ | 95 min3 |
| Cell chemistry | LiFePO4 | LiFePO4 |
| Rated cycle life | 3,000+ cycles to 80%4 | 4,000 cycles to 70%+5 |
| UPS switchover | 30 ms | <20 ms6 |
| Expandable | Yes, up to 3,000 Wh7 | None listed8 |
| Max solar input | 500 W ✓ | 400 W |
| Max AC charging input | 1,200 W | Manufacturer does not state |
| AC outlets | 69 ✓ | 3 |
| Highest USB-C port | 100 W10 | 100 W |
| App control | Yes11 | Yes12 |
| Stated noise | <60 dB13 | 30 dB14 |
| Warranty | 5 years15 | 3 years16 |
| Weight | about 27 lb17 | about 23.8 lb ✓ |
| Manufacturer list price when checked | Manufacturer does not state | $54918 |
* Calculated: rated capacity × an assumed 85–90% conversion efficiency; no maker publishes a usable figure.
Notes on the figures
- DELTA 2, surge: From the Output section of EcoFlow’s spec tab.
- DELTA 2, full recharge: Stated as 0–100%.
- Explorer 1000 v2, full recharge: Jackery’s spec table gives 1.58 hours with the AC adapter; the ‘Emergency Charge 1 Hr’ headline is a faster mode.
- DELTA 2, cycle life: EcoFlow’s DELTA 2 page gives two different figures: ‘3000+’ cycles in the description and ‘4000 cycles to 80%+’ in the spec tab. We use the lower one.
- Explorer 1000 v2, cycle life: Jackery rates 4,000 cycles to 70%+ remaining capacity. Some competitors rate to 80%; the cycle counts are not directly comparable.
- Explorer 1000 v2, UPS switchover: Stated as under 20 milliseconds; an upper bound.
- DELTA 2, expandable: 3 kWh with two extra batteries; 2,048 Wh with one.
- Explorer 1000 v2, expandable: No expansion option appears on the product page; the manufacturer does not explicitly state that none exists.
- DELTA 2, AC outlets: Product page Specs tab, ‘Output’ section.
- DELTA 2, USB-C: Not stated as text on the product page (Specs tab only says ‘Number of USB-C Output 2’; the Specs-tab product image shows the printed port label ‘USB-C 100W’).
- DELTA 2, app: Product page FAQ (‘What connection methods do the APP support?’).
- Explorer 1000 v2, app: Feature heading ‘Smart App Control And LCD Display’.
- DELTA 2, noise: Product page Specs tab.
- Explorer 1000 v2, noise: Marketing feature block titled ‘Peace and Quiet’.
- DELTA 2, warranty: Product page Specs tab.
- Explorer 1000 v2, warranty: Jackery states 3 years standard plus a 2-year extended warranty; per our policy we count the base three years.
- DELTA 2, weight: Manufacturer states ‘approx.’
- Explorer 1000 v2, price: Manufacturer’s listed price when checked; may have been a sale price.
The same specs, normalized
Ratios, so the bigger unit does not win by default.
| Measure | DELTA 2 | Explorer 1000 v2 |
|---|---|---|
| Cost per watt-hour | Not comparable — EcoFlow does not state a price for the DELTA 2. | |
| Watt-hours per pound | 37.9 Wh/lb | 45.0 Wh/lb ✓ |
| Surge headroom | 1.50× | 2.00× ✓ |
| Recharge rate | 12.8 Wh/min ✓ | 11.3 Wh/min |
| Rated cycle life | Not comparable — rated to different remaining-capacity thresholds (80% vs 70%). | |
| Continuous watts per dollar | Not comparable — EcoFlow does not state a price for the DELTA 2. | |
Definitions and direction of each ratio: How we verify.
What each one runs, for how long
| Appliance | DELTA 2 | Explorer 1000 v2 |
|---|---|---|
| Full-size refrigerator 150 W, 900 W start, 35% duty · eff. 80%–87% |
16–17 hr | 16–18 hr |
| Mini fridge 70 W, 400 W start, 30% duty · eff. 70%–82% |
34–40 hr | 36–42 hr |
| CPAP without humidifier 40 W · eff. 70%–82% |
18–21 hr | 19–22 hr |
| CPAP with heated humidifier 95 W · eff. 80%–87% |
8.6–9.4 hr | 9.0–9.8 hr |
| Gas furnace blower 400 W, 1600 W start, 40% duty · eff. 85%–90% |
5.4–5.8 hr | 5.7–6.0 hr |
| 1/3 hp sump pump 500 W, 1800 W start, 15% duty · eff. 85%–90% |
about 12 hr | 12–13 hr |
| Router and modem 20 W · eff. 70%–82% |
36–42 hr | 37–44 hr |
| Laptop 60 W · eff. 70%–82% |
12–14 hr | 12–15 hr |
| 1500W space heater 1500 W · eff. 82%–88% |
about 0.6 hr | about 0.6 hr |
Calculated, not measured: hours = rated Wh × efficiency ÷ (appliance W × duty); assumptions on How we verify. “Unlikely to start”: start-up surge exceeds the stated surge rating.
What the differences mean
Weight for the capacity. The Explorer 1000 v2 carries 45.0 Wh/lb against 37.9 Wh/lb for the DELTA 2. Both are two-hands-and-a-flat-surface units; the difference matters if the unit moves between car, porch and basement.
Surge headroom. The Explorer 1000 v2’s stated 3,000 W surge is 2.00× its 1,500 W continuous rating, against 1.50× for the DELTA 2 (2,700 W over 1,800 W). Headroom is what starts a compressor or a pump; see the refrigerator and sump rows in the runtime table.
Recharge. The DELTA 2 completes a wall recharge in 80 minutes against 95 for the Explorer 1000 v2 — about 15 fewer minutes of generator run time per charge in a multi-day outage.
Which one, and for whom
On normalized measures the Explorer 1000 v2 leads on watt-hours per pound (45.0 Wh/lb vs 37.9 Wh/lb) and surge headroom (2.00× vs 1.50×). The DELTA 2 answers on recharge rate (12.8 Wh/min vs 11.3 Wh/min). The deciding figure is the one your own outage will test first:
- CPAP overnight. Switchover: DELTA 2 30 ms, Explorer 1000 v2 under 20 ms. A 40 W CPAP runs roughly 18–21 hr on the DELTA 2 and 19–22 hr on the Explorer 1000 v2. Both run the night; on published figures the Explorer 1000 v2 switches at least as fast (under 20 ms vs 30 ms).
- Keeping a refrigerator cold. The compressor has to start before hours matter. The DELTA 2 states a 2,700 W surge rating; the Explorer 1000 v2 states a 3,000 W surge rating. A full-size refrigerator needs about 900 W to start.
- A multi-day outage with a generator or solar to recharge from. Full recharge: DELTA 2 80 min, Explorer 1000 v2 95 min. The faster unit spends less generator fuel per charge.
Check the current price
Links go to the exact base unit we compared, not a bundle. Amazon prices change daily.
We do not link the DELTA 2: we could not confirm a listing for the exact base unit, and we do not link a guess.
Buying a superseded model: what actually changes
Nothing in the table above changes because a model leaves the catalog. The cells, the inverter and the cycle rating are what they were. Three things do change.
- Price, and therefore cost per watt-hour. A superseded unit is only a bargain if its lower price beats the successor on cost per watt-hour and the successor’s advantages are ones you will not use. Compare against the successor’s figures (see our Explorer 1000 v2 and successor comparisons on the Comparisons page). If the successor’s surge or UPS figure is the one your outage tests, the discount is buying you the wrong unit cheaply.
- Warranty and support. The manufacturer states a 5-year warranty for the DELTA 2. Check with the retailer that the term runs from your purchase date, not the model’s launch date. How long firmware and app support continue for a retired model is not something we could verify from the manufacturer’s pages; if the app matters to you, ask before buying.
- Expansion batteries. If you expect to add capacity later, confirm the matching expansion battery is still sold. Successor batteries are not always backward-compatible.
Our rule: compare the discounted price against the successor on cost per watt-hour first. If the superseded unit does not win there, the rest does not matter.
Related reading
A 1,024–1,070 Wh battery cannot do what a gasoline generator does — the runtime table shows a 1,500 W space heater emptying either unit in about 0.6 hr — but it also cannot poison a household. How often gasoline generators kill indoors — and how the official count keeps being revised — is documented in our CPSC revision matrix, and this page puts every verified unit on the same refrigerator scenario.
Other comparisons with these models
Sources and method
- EcoFlow DELTA 2: manufacturer product page, checked 2026-08-23.
- Jackery Explorer 1000 v2: manufacturer product page, checked 2026-08-23.
Published specifications only; no bench tests. Method: How we verify.
More: Comparisons.