Quick Verdict
The EcoFlow Delta 2 is the best mid-size portable power station for most people. Its killer feature is charging speed—0 to 80% in just 50 minutes from a wall outlet. That's 5x faster than competitors like Jackery and Bluetti.
At $799 (often on sale for $649), it's not cheap. But you get a 1,024Wh LFP battery rated for 3,000+ charge cycles (that's 10+ years of daily use), expandability up to 3,040Wh, and one of the best apps in the industry.
The main downsides: it's heavy at 27 lbs (not ideal for backpacking), and the fan gets loud during fast charging. But for home backup, car camping, or remote work, the Delta 2 is hard to beat.
✓ What We Like
- Fastest charging in class: 0-80% in 50 minutes (AC wall), 0-100% in 80 minutes
- Expandable: Add 1-2 extra batteries for up to 3,040Wh total capacity
- LFP battery chemistry: 3,000 cycles to 80% = 10+ years of lifespan
- Excellent app: Real-time monitoring, remote control, firmware updates
- High output: 1,800W continuous (3,400W surge) runs most appliances
- 6 AC outlets + 6 USB ports: Enough for an entire workstation
- 5-year warranty: Best-in-class coverage
✗ What We Don't Like
- Price: $799 is steep for 1,024Wh (competitors offer more capacity for less)
- Weight: 27 lbs is heavy for camping or travel
- Fan noise: Gets loud (45-50 dB) during fast charging
- No wireless charging pad: Some competitors include this
- Extra batteries are expensive: $849 each for 1,024Wh expansion
Full Specifications
| EcoFlow Delta 2 Specifications | |
|---|---|
| Capacity | 1,024Wh (expandable to 3,040Wh) |
| Battery Type | LFP (Lithium Iron Phosphate) |
| Cycle Life | 3,000 cycles to 80% capacity |
| AC Output | 1,800W (3,400W surge with X-Boost) |
| AC Outlets | 6× pure sine wave (120V/60Hz) |
| USB-A | 2× 12W, 2× 18W (QC 3.0) |
| USB-C | 2× 100W (PD 3.0) |
| DC Output | 1× car port (126W), 2× DC5521 (38W) |
| AC Charge Time | 0-80% in 50 min, 0-100% in 80 min |
| Solar Input | 500W max (11-60V, 15A) |
| Solar Charge Time | 3 hours (with 400W panels) |
| Car Charge Time | 9.5 hours (with included cable) |
| Weight | 27 lbs (12.2 kg) |
| Dimensions | 15.4 × 8.5 × 11 inches |
| Operating Temp | -4°F to 113°F (-20°C to 45°C) |
| Warranty | 5 years |
| Price | $799 (check for sales) |
Our Testing Process
We've been using the EcoFlow Delta 2 since September 2025—over 6 months of real-world testing. Here's what we put it through:
- 3 power outages (longest was 8 hours—the Delta 2 kept our fridge, router, and phones running)
- 5 camping trips (ranging from overnight to 4-day trips)
- Daily workstation use (laptop, monitor, phone charging)
- 150+ charge cycles (no measurable capacity degradation)
- Solar charging tests (with EcoFlow 220W bifacial panel)
We measured actual capacity, noise levels at various loads, charging speeds in different conditions, and app reliability. All numbers in this review are from our own testing, not manufacturer claims.
Charging Speed Test
This is where the Delta 2 crushes the competition. Using EcoFlow's X-Stream technology, it charges insanely fast from a wall outlet:
Our Charging Test Results (AC Wall)
- 0% → 50%: 28 minutes
- 0% → 80%: 50 minutes
- 0% → 100%: 78 minutes
For comparison, the Jackery 1000 Plus takes 1.7 hours for a full charge, and the Bluetti AC200MAX takes 2.5 hours.
Why does this matter? Fast charging means you can top up during a quick break. Heading out for a camping trip but forgot to charge? Plug it in while you pack, and you'll be at 80%+ in under an hour.
The tradeoff: The fan kicks into high gear during fast charging and gets loud—we measured 48 dB at 1 meter. If you need to charge overnight in a bedroom, use the "Quiet Mode" in the app, which limits input to 200W and keeps things whisper-quiet (though charging takes ~5 hours).
Real-World Capacity
EcoFlow rates the Delta 2 at 1,024Wh. In our testing, we got 960-980Wh of usable capacity—that's about 95% efficiency, which is excellent for an inverter-based system.
How Long Will It Run Your Stuff?
- Laptop (60W): 15-16 hours
- Mini fridge (50W avg): 18-20 hours
- Full-size fridge (150W avg): 6-7 hours
- CPAP machine (30-60W): 16-30+ hours
- 55" LED TV (80W): 11-12 hours
- Phone (10x charges): ~40 full charges
- Electric blanket (100W): 9-10 hours
- Portable heater (1500W): 35-40 minutes
Need more capacity? You can add EcoFlow's extra battery ($849) for 2,048Wh total, or two extra batteries for 3,040Wh. The batteries daisy-chain seamlessly and charge simultaneously.
Noise Levels
We tested fan noise at various loads, measured at 1 meter:
- Idle (no load): Silent (fan off)
- Light load (<200W): 30-35 dB (barely audible)
- Medium load (200-800W): 38-42 dB (quiet conversation)
- Heavy load (>1000W): 45-48 dB (noticeable)
- Fast charging: 48-52 dB (loud, like a desktop PC)
For camping: the Delta 2 is quiet enough for tent use at typical loads. Just avoid fast-charging it while trying to sleep.
EcoFlow App
The EcoFlow app is the best in the industry—and it's not close. It connects via Bluetooth or Wi-Fi and lets you:
- Monitor in real-time: Input/output wattage, battery %, time remaining
- Control remotely: Turn AC/DC/USB outputs on/off, set charge limits
- Customize: Adjust charge speed, set quiet hours, configure X-Boost
- Update firmware: New features and bug fixes over the air
- Track history: See usage patterns and total energy consumed
The app works reliably and updates quickly. We've had zero connection issues over 6 months. Jackery's app, by comparison, is basic and often laggy.
Solar Charging
The Delta 2 accepts up to 500W of solar input (11-60V, 15A). We tested it with EcoFlow's 220W bifacial panel:
Solar Charging Results (220W Panel)
- Peak input: 195W (ideal conditions, panel angled at sun)
- Average input: 140-160W (typical sunny day)
- Full charge: 6-7 hours of good sun
For faster solar charging, pair it with 2× 220W panels ($300 each) or a single 400W panel. With 400W input, you can achieve a full charge in 3-4 hours.
The built-in MPPT controller is efficient—we measured 97% conversion efficiency, matching EcoFlow's claims.
Should You Get the EcoFlow Solar Panel?
EcoFlow's 220W bifacial panel ($449) is high quality but expensive. Third-party panels (like Bluetti or BougeRV) work fine and cost 30-40% less. Just check the voltage/amperage specs before buying.
Alternatives to Consider
The Delta 2 isn't perfect for everyone. Here are the main alternatives:
Jackery 1000 Plus ($1,199): More capacity (1,264Wh) and expandable to 5,000Wh, but slower charging (1.7 hours). Better if you need massive capacity over charging speed.
Bluetti AC200MAX ($1,599): Higher capacity (2,048Wh), more ports, but slower charging (2.5 hours) and heavier (62 lbs). Better for home backup, overkill for camping.
Bluetti EB70S ($399): Less capacity (716Wh) but half the price. Good for occasional use or tight budgets.
EcoFlow Delta Pro ($2,299): The big brother—3,600Wh, expandable to 25kWh, home panel integration. For serious home backup only.
Frequently Asked Questions
Can the Delta 2 power a refrigerator?
Yes. A typical full-size refrigerator draws 100-200W running (1,200W surge on startup). The Delta 2's 1,800W output handles this easily. Expect 5-8 hours of runtime depending on your fridge's efficiency.
Is it safe to charge while using (pass-through)?
Yes. The Delta 2 supports UPS mode with a 30ms switchover time. It's fast enough for most electronics but not instant—critical medical equipment should have dedicated UPS backup.
How long will the battery last?
EcoFlow rates it for 3,000 cycles to 80% capacity. If you cycle it daily, that's 8+ years. Most users will see 10-15 years of useful life.
Can I use it while charging from solar?
Yes, solar pass-through works perfectly. The system prioritizes solar input and only pulls from the battery when solar can't keep up.
What's the difference between Delta 2 and Delta 2 Max?
The Delta 2 Max has 2,048Wh (double the capacity), 2,400W output, and costs $1,699. Get it if you need more capacity out of the box. The regular Delta 2 is better value if you might expand later.
Is it airplane-safe?
No. At 1,024Wh, it far exceeds the 100Wh limit for carry-on batteries. You'll need to ship it or drive.
Final Verdict
EcoFlow Delta 2
The best mid-size power station for most people. Unmatched charging speed, excellent app, and reliable performance. The price is steep, but you get what you pay for.
Buy on Amazon — $799Buy the EcoFlow Delta 2 if:
- You need fast charging (under 1 hour to 80%)
- You want the best app experience
- You might expand capacity later
- You value reliability and warranty coverage
Skip it if:
- You need maximum capacity per dollar (get the Bluetti AC200MAX)
- You're on a tight budget (get the EB70S)
- You need it for backpacking (27 lbs is too heavy)
For everything else—home backup, car camping, remote work, emergency preparedness—the Delta 2 is our top recommendation.