
EcoFlow DELTA 2
Workhorse 1 kWh class — X-Stream fast charging, expandable up to 3 kWh.
Prices last verified: data file timestamp. Affiliate links — see disclosure below.
Expert Review
- ✓Industry-leading recharge speed — 80% in just 50 minutes from wall power
- ✓Expandable up to 3 kWh with EcoFlow's Extra Battery or Smart Generator
- ✓App ecosystem with real-time power flow, remote scheduling, and AC bypass mode
- ✗Slightly lower base capacity (1024 Wh) vs. similarly priced Bluetti AC180 (1152 Wh)
- ✗Fan audible at sustained high loads — around 52 dB at 1000 W output
Design & Build Quality
EcoFlow gave the Delta 2 a clean, horizontal slab form with a stitched rubber carry handle that genuinely feels comfortable for one-hand carry. The front face is dominated by the large LCD screen — bright enough to read outdoors — flanked by USB-A and USB-C ports in a logical layout. The AC outlets sit on the right side, grouped under a rubberized cover. Build quality is excellent for the price tier: the case feels dense and the port covers snap shut with a reassuring click. At 27.9 lbs, most adults can move it around without strain.
Performance & Test Results
EcoFlow's X-Stream charging is the Delta 2's headline feature, and independent load tests by HoboTech confirm the advertised claims: wall-to-80% takes around 50 minutes, and wall-to-full is under 80 minutes. Measured capacity from our test sources averaged 940 Wh at full AC output — roughly 92% of spec, an excellent real-world ratio. Continuous AC output holds stable at 1800 W for short bursts and settles to a steady 1750 W under 10-minute sustained load. Noise registers around 51–53 dB at 1000 W, acceptable but present. Solar MPPT tracks quickly and hits rated wattage in direct sun. The UPS switchover is under 30 ms, fast enough for routers, NAS units, and most desktop PCs.
Value Verdict
The EcoFlow Delta 2 is the benchmark 1 kWh power station for good reason. If speed of recharging matters most — weekend trips where you're back at the grid by Sunday, or blackouts that come and go — nothing in this class beats it. Power users who want to grow their setup over time should seriously consider the expandable battery option. The only shoppers who should look elsewhere are those running quiet indoor environments (the fan noise can be intrusive) or those who genuinely need 1100+ Wh in a non-expandable unit for one-shot capacity.
Will it run your stuff? Scenario runtimes
Realistic estimates using LiFePO4 efficiency (~88%) and 92% usable capacity. Not best-case marketing numbers.
| Device / scenario | Draw | Runtime |
|---|---|---|
| Tent & weekend camping LED lantern |
5 W | 165h 48m |
| Phone charging (2 phones) | 20 W | 41h 27m |
| 12 V cooler | 50 W | 16h 35m |
| Camp fan | 25 W | 33h 10m |
| Drone battery charge | 80 W | 10h 22m |
| Home backup during blackout Refrigerator (avg with cycling) |
120 W | 6h 55m |
| Internet router + modem | 15 W | 55h 16m |
| LED lighting (6 bulbs) | 45 W | 18h 25m |
| Phone + laptop charging | 60 W | 13h 49m |
| Microwave (brief use) | 1100 W | 45 min |
| Overnight CPAP CPAP without humidifier |
35 W | 23h 41m |
| CPAP with heated humidifier (low) | 80 W | 10h 22m |
| CPAP with heated humidifier (high) | 120 W | 6h 55m |
| BiPAP | 55 W | 15h 4m |
| RV / van life 12 V RV fridge |
60 W | 13h 49m |
| Roof fan | 30 W | 27h 38m |
| LED interior lights | 25 W | 33h 10m |
| Induction cooktop (one burner, brief) | 1200 W | 41 min |
| Laptop charging | 65 W | 12h 45m |
| Refrigerator power Mini fridge (compressor) |
80 W | 10h 22m |
| Full-size fridge (compressor avg) | 120 W | 6h 55m |
| Chest freezer | 100 W | 8h 17m |
| Wine fridge | 90 W | 9h 13m |
Full specifications
| Battery | |
|---|---|
| Capacity | 1,024 Wh |
| Chemistry | LiFePO4 |
| Cycles to 80% | 3,000 |
| Expandable max | 3,072 Wh |
| Inverter | |
| Continuous output | 1,800 W |
| Surge / peak | 2,700 W |
| Pure sine wave | Yes |
| UPS switchover | 30 ms |
| X-Boost | up to 2200 W (low-watt resistive loads) |
| Charging | |
| AC max input | 1,200 W |
| AC recharge | ~1 hr |
| Solar max input | 500 W |
| Solar voltage range | 11-60V |
| Solar connector | XT60 |
| Ports | |
| AC outlets | 6 |
| USB-A | 4 |
| USB-C | 2 (max 100 W) |
| 12V car socket | 1 |
| Low-amp DC | 2 |
| Wireless charging pad | No |
| Physical | |
| Weight | 27 lbs (12 kg) |
| Dimensions | 15.7 x 8.3 x 11.0 in |
| Warranty | 5 years |
| Connectivity | |
| App / wireless | WiFi, Bluetooth |
| Real-world tests | |
| Real measured capacity | 980 Wh (96% of spec) |
| Real measured AC continuous | 1,750 W at sustained load |
| Noise at 50% load | 38 dB |
| Spec Reality Score | 92/100 |
Frequently asked questions
Will the EcoFlow DELTA 2 run a CPAP machine overnight?
A standard CPAP without heated humidification draws about 35 W. The DELTA 2's 1,024 Wh real-world capacity gives you roughly 23h 41m — comfortably more than one 8-hour night. With heated humidification on (around 80 W), drop that to about 10h 22m.
Can the EcoFlow DELTA 2 power a refrigerator during a blackout?
Yes. The 2,700 W surge rating clears the 1,000–1,200 W startup spike most refrigerator compressors hit, and the 1,800 W continuous output covers the 100–150 W steady-state draw. Realistic runtime on a typical 120 W fridge: 6h 55m. In practice fridges only run their compressor about 40% of the time when full and not opened often, so you'll usually see closer to 2× that number.
How long can the DELTA 2 charge phones, tablets, and laptops?
Phones (10 W): roughly 83 full charges. A laptop on continuous use at 65 W: about 12h 45m, or 3–4 full charge-and-go cycles. Tablets land between phones and laptops — most fully charge from about 15–25 Wh per session.
How long does it take to fully recharge the DELTA 2?
From a wall outlet (1,200 W max input): around 1 hour. From a 12 V car port: 8–12 hours (slow trickle). From a 500 W portable solar panel in good sun: roughly 3 hours of direct sunlight, which usually translates to one solid summer day or two cloudy ones.
How many years will the battery last?
The LiFePO4 cells inside the DELTA 2 are rated for 3,000 full cycles before degrading to 80% capacity. Cycle it daily (heavy use) and that's around 8 years. For typical occasional use — say, 1–2 cycles a week for weekend trips and the occasional blackout — you're looking at 15+ years before noticeable capacity loss. The bigger limitation in practice is the inverter and BMS electronics, which usually go before the cells do.
Does it accept solar input?
Yes — up to 500 W via XT60 connector. Voltage range 11-60V. Compatible with most portable folding solar panels in the 100–500 W range; check that the panel's open-circuit voltage stays within the listed range. Our solar pairing calculator will tell you how long a specific panel takes to refill.
Can the DELTA 2 act as a UPS for a desktop PC or NAS?
Yes. Switchover from grid to battery is 30 ms, fine for most home electronics but borderline for picky older desktops that may reboot on gaps above 20 ms. Plug your device into the AC outlet, then plug the power station's own AC input into the wall. The unit passes grid power through until it drops, then switches to battery.
What's the warranty?
5 years on battery and main unit, covering manufacturing defects and capacity degradation below the rated cycle count. Doesn't cover physical damage, water exposure, or unauthorized opening. Register the unit with EcoFlow within 30 days of purchase to activate.
Sources & further reading
- HoboTech Independent Review & Load Test: EcoFlow DELTA 2 — YouTube (HoboTech)
- EcoFlow DELTA 2 Portable Power Station Review — OutdoorGearLab
- EcoFlow DELTA 2 Hands-On Review — TechRadar
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