EcoFlow Our score 7.8/10 #1 of 17 mid-size for real capacity
EcoFlow DELTA 3 Classic
Updated
EcoFlow's stripped-back 1 kWh unit. It gives up battery expansion, the 12 V car outlet and some ports, but in CNET's test it delivered more of its rated capacity than any other 1 kWh unit.
Independent tests put this portable power station's usable capacity at 947 Wh, 93% of the rated 1,024 Wh (one test so far).
Real capacity
947of 1,024 Wh
-
CNET
93%
AC output
1,800 W
More than 5 of the 16 other mid-size models we review. 3,000 W surge.
Cost per usable Wh
$0.53
#12 of 33 models we've priced.
Good valueWeight
26.6 lb
36 usable Wh per lb
Battery
LiFePO4
Long-life chemistry
Warranty
3 years
Wall charge
1 h
To full, maker’s figure
How much of the 1,024 Wh do you get?
Each bar is the full rated capacity. Blue is what the tester measured coming out of the AC outlets; the striped end is what was lost.
-
CNET 947 Wh · 93%
How long will it run your devices?
Add what you want to power and see how long the EcoFlow DELTA 3 Classic lasts on its tested 947 Wh, counting the power it uses on itself and any solar panels you add.
Our score: 7.8 out of 10
Worked out from the tested capacity and the specs on this page, compared with the other models we track. Capacity, power and charging are compared with the 17 mid-size models; battery, build and features with all 37. Price isn't part of it. How we score.
-
Capacity and power 35% of the score 8.2
What goes into capacity and power Measure This model Score Tested usable capacity 60% 947 Wh 8.7 Continuous AC output 25% 1,800 W 7.5 AC surge 15% 3,000 W 7.3 Compared with the 17 mid-size models we track. Scores run from 5 to 10; 7.5 is the middle of the group.
-
Charging 25% of the score 7.6
What goes into charging Measure This model Score Wall charge to full 40% 1 h 7.3 Max solar input 35% 500 W 7.0 UPS switchover 25% 10 ms 9.0 Compared with the 17 mid-size models we track. Scores run from 5 to 10; 7.5 is the middle of the group.
-
Battery and build 25% of the score 8.4
What goes into battery and build Measure This model Score Battery type 30% LiFePO4 10.0 Cycle life to 80% 25% Not known Left out Warranty 25% 3 years 6.5 Usable Wh per lb 20% 36 Wh/lb 8.4 Compared with all 37 models we track. Scores run from 5 to 10; 7.5 is the middle of the group. Measures we have no figure for are left out.
-
Features 15% of the score 6.4
What goes into features Measure This model Score Expandable battery 25% No 5.0 AC + USB-C outlets 20% 5 6.5 USB-C max output 15% 100 W 7.0 240 V output 15% No 5.0 App control 15% Yes 10.0 Wheels 10% No 5.0 Compared with all 37 models we track. Scores run from 5 to 10; 7.5 is the middle of the group.
Pros and cons
Pros
- CNET measured 947 Wh, the highest share of rated capacity of any 1 kWh unit in its tests.
- Among the lowest costs per usable watt-hour of any 1 kWh unit at the prices we checked.
- 1,800 W continuous AC output.
- Full wall charge in about an hour, according to EcoFlow.
- Battery backup (UPS) mode with a 10 ms switchover.
Cons
- Only three AC outlets, and one of them is a 2-prong (ungrounded) outlet.
- No 12 V car-style outlet, and only one USB-A port.
- Not expandable.
- The 5-year warranty needs registration in the EcoFlow app (3 years otherwise).
- Only one test so far.
Who it's for
Budget buyers who want the most usable energy for their money in a 1 kWh unit, for outages or camping.
Who should skip it
Skip it if you want to add batteries later or need lots of outlets. The DELTA 3 has six AC outlets and an extra-battery port.
Features
- Battery backup (UPS) mode : yes
- Takes extra batteries : no
- LiFePO4 battery : yes
- Solar input, 500 W : yes
- Car charging : yes
- 240 V output : no
- RV outlet (TT-30) : no
- App control : yes
- Wheels : no
How it compares with other mid-size models
| Model | Usable | Delivered | Price | Value |
|---|---|---|---|---|
| EcoFlow DELTA 3 Classic 1,024 Wh rated | 947 Wh | 93% | $499 | Good value |
| UDPower C600 596 Wh rated | 497 Wh | 83% | – | No price checked yet |
| Duracell G800 620 Wh rated | 503 Wh | 81% | $699 | Pricey |
| Goal Zero Yeti 700 677 Wh rated | 560 Wh | 83% | $699.95 | Pricey |
| Dabbsson 600L 768 Wh rated | 653 Wh | 85% | $299 | Great value |
| Anker SOLIX C1000 Gen 2 1,024 Wh rated | 880 Wh | 86% | $499.99 | Good value |
| BLUETTI Elite 100 V2 1,024 Wh rated | 890 Wh | 87% | $489 | Good value |
| DJI Power 1000 V2 1,024 Wh rated | 840 Wh | 82% | – | No price checked yet |
| EcoFlow DELTA 3 1,024 Wh rated | 885 Wh | 86% | $629 | Fair price |
| EcoFlow DELTA 3 Plus 1,024 Wh rated | 875 Wh | 85% | $719 | Pricey |
| OUPES Mega 1 1,024 Wh rated | 809 Wh | 79% | $699 | Pricey |
| OUPES Mega 1 Lite 1,024 Wh rated | 855 Wh | 84% | $599 | Fair price |
| Anker SOLIX C1000 (first gen) 1,056 Wh rated | 950 Wh | 90% | $469.99 | Great value |
| Jackery Explorer 1000 v2 1,070 Wh rated | 923 Wh | 86% | $499 | Good value |
| ALLPOWERS R1500 1,152 Wh rated | 956 Wh | 83% | $539 | Good value |
| BLUETTI AC180 1,152 Wh rated | 991 Wh | 86% | $499 | Good value |
| Jackery Explorer 1000 Plus 1,264 Wh rated | 1,090 Wh | 86% | $619 | Good value |
Questions
How much usable power does the EcoFlow DELTA 3 Classic have?
CNET measured 947 Wh at its standard 480 W load, against a rated 1,024 Wh. It's one test so far, so treat it as a good sign rather than settled.
What's the difference between the DELTA 3 Classic and the DELTA 3?
The Classic has no extra-battery port, three AC outlets instead of six, no 12 V car outlet and fewer USB ports. Both have 1,024 Wh rated capacity and 1,800 W output.
Is the DELTA 3 Classic's surge 3,000 W or 3,600 W?
EcoFlow's US manual says 3,000 W; its product page says 3,600 W. We use the manual's figure.
Full specs
From the maker's US manual or product page unless noted. Each value links to where we found it.
Capacity and battery
- Cycle life (to 80% capacity)
- Not published
- Maximum with extra batteries
- Not expandable
Output and ports
- AC surge
- 3,000 W From the US manual. EcoFlow's product page says 3,600 W.
- images.thdstatic.com (source for AC surge)
- Boost mode (heating loads only)
- 2,600 W
- images.thdstatic.com (source for Boost mode (heating loads only))
- AC outlets
- 3 Two grounded outlets and one 2-prong outlet, counted from the manual's diagram.
- images.thdstatic.com (source for AC outlets)
Charging
Size and build
Warranty and certification
- Warranty
- 3 years 5 years if you register it in the EcoFlow app.
- us.ecoflow.com (source for Warranty)
- Certifications
- FCC Part 15 Class A, ISED ICES-003(A) FCC Class A is the class meant for commercial settings. Most home products declare Class B.
- images.thdstatic.com (source for Certifications)
- Released
- Not published
Where this data comes from
Capacity figures come from the independent testers linked above. We record their numbers, the date and the load, and link to their reports; the testing is theirs. Specs come from EcoFlow's own US documents, and we note where they disagree with each other or with test results. Prices are checked by hand on the brand's US store.