EcoFlow Our score 8.2/10 #4 of 17 mid-size for real capacity
EcoFlow DELTA 3
Updated
EcoFlow's mainstream 1 kWh unit: six AC outlets, fast charging and a port for extra batteries up to about 5 kWh.
Independent tests put this portable power station's usable capacity at 885 Wh, 86% of the rated 1,024 Wh (the median of 2 tests).
Real capacity
885of 1,024 Wh
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OutdoorGearLab
85%
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Outdoor Life
88%
AC output
1,800 W
More than 5 of the 16 other mid-size models we review. 3,600 W surge.
Cost per usable Wh
$0.71
#24 of 33 models we've priced.
Fair priceWeight
27.6 lb
32 usable Wh per lb
Battery
LiFePO4
Long-life chemistry
Warranty
5 years
Wall charge
56 min
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.
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OutdoorGearLab 870 Wh · 85%
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Outdoor Life 900 Wh · 88%
At light loads it delivers much less
At about 34 W, Outdoor Life measured 530 Wh, 52% of rated. The unit's own running costs take a bigger share when the load is small. Bear this in mind for a CPAP, a fridge overnight or a few lights.
How long will it run your devices?
Add what you want to power and see how long the EcoFlow DELTA 3 lasts on its tested 885 Wh, counting the power it uses on itself and any solar panels you add.
Our score: 8.2 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.
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Capacity and power 35% of the score 7.8
What goes into capacity and power Measure This model Score Tested usable capacity 60% 885 Wh 7.8 Continuous AC output 25% 1,800 W 7.5 AC surge 15% 3,600 W 8.5 Compared with the 17 mid-size models we track. Scores run from 5 to 10; 7.5 is the middle of the group.
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Charging 25% of the score 8.2
What goes into charging Measure This model Score Wall charge to full 40% 56 min 8.8 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.
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Battery and build 25% of the score 8.7
What goes into battery and build Measure This model Score Battery type 30% LiFePO4 10.0 Cycle life to 80% 25% 4,000 cycles 8.6 Warranty 25% 5 years 8.5 Usable Wh per lb 20% 32 Wh/lb 7.2 Compared with all 37 models we track. Scores run from 5 to 10; 7.5 is the middle of the group.
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Features 15% of the score 8.2
What goes into features Measure This model Score Expandable battery 25% Yes 10.0 AC + USB-C outlets 20% 8 9.3 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
- Expandable to about 5 kWh with EcoFlow's extra batteries.
- Six AC outlets and 1,800 W continuous output.
- Full wall charge in 56 minutes, according to EcoFlow.
- Battery backup (UPS) mode with a 10 ms switchover.
- 5-year warranty out of the box.
Cons
- At a 34 W load it delivered only 52% of rated capacity in Outdoor Life's test. Outdoor Life measured its idle draw at 16 W.
- OutdoorGearLab found half of the AC outlets are 2-prong (ungrounded).
- One solar input, 500 W maximum. The DELTA 3 Plus takes 1,000 W.
- At 27.6 lb it's heavier than most 1 kWh rivals.
Who it's for
Home backup buyers who want a 1 kWh unit now and the option to add capacity later.
Who should skip it
Skip it if you mainly run small loads overnight, like a CPAP, where its idle draw costs you. Skip it too if you'll never expand: the DELTA 3 Classic costs less.
Features
- Battery backup (UPS) mode : yes
- Takes extra batteries : yes
- 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 1,024 Wh rated | 885 Wh | 86% | $629 | Fair price |
| 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 Classic 1,024 Wh rated | 947 Wh | 93% | $499 | Good value |
| 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 have?
About 885 Wh at normal loads. OutdoorGearLab measured 870 Wh and Outdoor Life 900 Wh at about 380 W, against a rated 1,024 Wh. At a 34 W load, Outdoor Life measured 530 Wh.
DELTA 3 or DELTA 3 Plus?
The Plus adds a second solar input (1,000 W in total versus 500 W). Both take EcoFlow's extra batteries up to about 5 kWh and have 1,800 W output.
How far can the DELTA 3 expand?
EcoFlow says up to 5 kWh, reached with one DELTA Pro 3 Extra Battery.
Full specs
From the maker's US manual or product page unless noted. Each value links to where we found it.
Capacity and battery
- Rated capacity
- 1,024 Wh
- ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com (source for Rated capacity)
- Battery type
- LiFePO4 (LFP)
- ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com (source for Battery type)
- Cycle life (to 80% capacity)
- 4,000 cycles
- ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com (source for Cycle life (to 80% capacity))
- Takes extra batteries
- Yes
- ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com (source for Takes extra batteries)
Output and ports
- AC output (continuous)
- 1,800 W
- ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com (source for AC output (continuous))
- Boost mode (heating loads only)
- 2,600 W From the US manual. EcoFlow's product page spec table says 2,200 W.
- ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com (source for Boost mode (heating loads only))
- AC outlets
- 6 OutdoorGearLab reports half are 2-prong (ungrounded).
- us.ecoflow.com (source for AC outlets)
Charging
- Solar input (maximum)
- 500 W
- ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com (source for Solar input (maximum))
- Solar voltage range
- 11-60 V
- ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com (source for Solar voltage range)
- Car charging input
- 96 W
- ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com (source for Car charging input)
- Battery backup (UPS) mode
- Yes
- ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com (source for Battery backup (UPS) mode)
- UPS switchover time
- 10 ms
- ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com (source for UPS switchover time)
Size and build
- Dimensions
- 15.7 × 8.0 × 11.2 in
- ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com (source for Dimensions)
Warranty and certification
- 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.
- ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com (source for Certifications)
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.