Highest data score
80 / 100
EcoFlow DELTA Pro Ultra X →Source: https://batteryrank.com/methodology · 2026-07-16
Power stationsSections
← EcoFlow lineup
Family comparison
EcoFlow DELTA models compared
A size-by-size comparison of every EcoFlow DELTA, Max, Ultra, and Pro power station we track.
By the BatteryRank Engineering Team
01
What separates the EcoFlow DELTA line
DELTA is EcoFlow’s mains-replacement line — the units meant to sit in a house or an RV and carry real appliance loads, rather than travel.
What the manufacturer claims
Manufacturer claims are attributed below. Our analysis follows alongside.
EcoFlow positions the DELTA series around household backup, higher continuous output, and expansion into whole-home capacity.
ecoflow.com — DELTA series →The DELTA Pro 3 is a portable main unit with optional extra batteries. DELTA Pro Ultra and Ultra X listings describe separate inverter and battery modules, so the included components are part of the specification we compare.
EcoFlow US — DELTA Pro 3 configurations; checked October 3, 2026 →DELTA Pro Ultra bundles list the inverter and battery modules included in the kit.
EcoFlow US — DELTA Pro Ultra configurations; checked October 3, 2026 →DELTA Pro Ultra X bundles also list inverter and battery components separately.
EcoFlow US — DELTA Pro Ultra X configurations; checked October 3, 2026 →
What the DELTA units we track show
Computed from the sourced specifications of the models in our catalogue — a deliberately selected slice of what this brand sells, never the full lineup.
The eleven DELTA units in this published family comparison run 1,024 Wh to 12,288 Wh and 1,800 W to 12,000 W continuous, and ten of the eleven carry a sourced expansion capability. The generation jump is where the sourced data is most useful: DELTA 2 and DELTA 3 are both 1,024 Wh with the same 1,800 W inverter, but the DELTA 3 adds 900 W of surge headroom, moves from 3,000 to 4,000 rated cycles, and cuts full AC charging from 72 to 56 minutes. Same nominal size, materially different unit. The DELTA 3 Classic is the exception that proves the naming is not a ladder: it matches the DELTA 3 on capacity, inverter and surge, and it is the only unit in the family with no sourced expansion capability at all.
02
Lineup at a glance
This page owns family and generation-chart intent. It goes deeper than the brand hub but sends exact two-model decisions to head-to-head pages and deal queries to price history.
Choose two EcoFlow DELTA models
Narrow by capacity class, then compare the sourced readings that change between the two units.
What changes
Change is Model B minus Model A. Open a reading to inspect its source and date.
| Specification | DELTA 3 | DELTA 3 Plus | Change |
|---|---|---|---|
| Rated capacity | 1024 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station | 1024 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station | Same sourced figure Model A source · us.ecoflow.com · 2026-07-04Model B source · us.ecoflow.com · 2026-07-04 |
| Usable capacity | 1024 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station | 1024 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station | Same sourced figure Model A source · us.ecoflow.com · 2026-07-04Model B source · us.ecoflow.com · 2026-07-04 |
| Continuous AC output | 1800 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station | 1800 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station | Same sourced figure Model A source · us.ecoflow.com · 2026-07-04Model B source · us.ecoflow.com · 2026-07-04 |
| Surge output | 3600 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station | 3600 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station | Same sourced figure Model A source · us.ecoflow.com · 2026-07-04Model B source · us.ecoflow.com · 2026-07-04 |
| Weight | 12.5 kg. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station | 12.5 kg. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station | Same sourced figure Model A source · us.ecoflow.com · 2026-07-04Model B source · us.ecoflow.com · 2026-07-04 |
| Full wall charge | 56 min. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station | 56 min. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station | Same sourced figure Model A source · us.ecoflow.com · 2026-07-04Model B source · us.ecoflow.com · 2026-07-04 |
| Maximum solar input | 500 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station | 1000 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station | +500 WModel B minus Model A Model A source · us.ecoflow.com · 2026-07-04Model B source · us.ecoflow.com · 2026-07-04 |
| Maximum expanded capacity | 5000 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station | 5000 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station | Same sourced figure Model A source · us.ecoflow.com · 2026-07-04Model B source · us.ecoflow.com · 2026-07-04 |
| Rated cycle life | 4000 cycles. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station | 4000 cycles. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station | Same sourced figure Model A source · us.ecoflow.com · 2026-07-04Model B source · us.ecoflow.com · 2026-07-04 |
| UPS switchover | 10 ms. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station | 10 ms. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station | Same sourced figure Model A source · us.ecoflow.com · 2026-07-04Model B source · us.ecoflow.com · 2026-07-04 |
Manufacturer-claimed unless marked verified. A missing reading means the source set does not establish that specification for the selected model.
| Model | Score | Rated capacity | AC output | Weight | Solar input | Max expanded capacity | Where to buy |
|---|---|---|---|---|---|---|---|
| EcoFlow DELTA 2 | 57 / 100 | 1024 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-10https://us.ecoflow.com/products/delta-2-portable-power-station | 1800 W. Show sourceclaimed sourceus.ecoflow.com2026-07-10https://us.ecoflow.com/products/delta-2-portable-power-station | 12 kg. Show sourceclaimed sourceecoflow-service-us-prod.oss-us-west-1.aliyuncs.com2026-07-10https://ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com/cms/manual/1726036585595/DELTA%202%20USER%20MANUAL.pdf | 500 W. Show sourceclaimed sourceus.ecoflow.com2026-07-10https://us.ecoflow.com/products/delta-2-portable-power-station | 2048 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-10https://us.ecoflow.com/products/delta-2-portable-power-station |  |
| EcoFlow DELTA 3 | 68 / 100 | 1024 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station | 1800 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station | 12.5 kg. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station | 500 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station | 5000 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station |  |
| EcoFlow DELTA 3 Classic (1024Wh) | 50 / 100 | 1024 Wh. Show sourceclaimed sourcemanuals.ecoflow.com2026-07-27https://manuals.ecoflow.com/eu/product/delta-3-classic?lang=en_US | 1800 W. Show sourceclaimed sourcemanuals.ecoflow.com2026-07-27https://manuals.ecoflow.com/eu/product/delta-3-classic?lang=en_US | 12.1 kg. Show sourceclaimed sourcemanuals.ecoflow.com2026-07-27https://manuals.ecoflow.com/eu/product/delta-3-classic?lang=en_US | 500 W. Show sourceclaimed sourcemanuals.ecoflow.com2026-07-27https://manuals.ecoflow.com/eu/product/delta-3-classic?lang=en_US | N/A |  |
| EcoFlow DELTA 3 Plus | 72 / 100 | 1024 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station | 1800 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station | 12.5 kg. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station | 1000 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station | 5000 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station |  |
| EcoFlow DELTA 2 Max | 65 / 100 | 2048 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-2-max-portable-power-station | 2400 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-2-max-portable-power-station | 23 kg. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-2-max-portable-power-station | 1000 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-2-max-portable-power-station | 6144 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-2-max-portable-power-station |  |
| EcoFlow DELTA 3 Max | 65 / 100 | 2048 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-max-series-portable-power-station?view=d3m | 2400 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-max-series-portable-power-station?view=d3m | 20.3 kg. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-max-series-portable-power-station?view=d3m | 500 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-max-series-portable-power-station?view=d3m | N/A |  |
| EcoFlow DELTA 3 Max Plus (2048Wh) | 68 / 100 | 2048 Wh. Show sourceclaimed sourceecoflow.com2026-07-27https://www.ecoflow.com/us/delta-3-max-plus-portable-power-station/specs | 3000 W. Show sourceclaimed sourceecoflow.com2026-07-27https://www.ecoflow.com/us/delta-3-max-plus-portable-power-station/specs | 22.1 kg. Show sourceclaimed sourceecoflow.com2026-07-27https://www.ecoflow.com/us/delta-3-max-plus-portable-power-station/specs | 1000 W. Show sourceclaimed sourceecoflow.com2026-07-27https://www.ecoflow.com/us/delta-3-max-plus-portable-power-station/specs | 10240 Wh. Show sourceclaimed sourceecoflow.com2026-07-27https://www.ecoflow.com/us/delta-3-max-plus-portable-power-station/specs |  |
| EcoFlow DELTA 3 Ultra | 61 / 100 | 3072 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/ecoflow-delta-3-ultra-portable-power-station-3072wh | 3600 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/ecoflow-delta-3-ultra-portable-power-station-3072wh | 32.7 kg. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/ecoflow-delta-3-ultra-portable-power-station-3072wh | 800 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/ecoflow-delta-3-ultra-portable-power-station-3072wh | N/A |  |
| EcoFlow DELTA Pro 3 | 76 / 100 | 4096 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-3-portable-power-station | 4000 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-3-portable-power-station | 51.5 kg. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-3-portable-power-station | 2600 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-3-portable-power-station | 48000 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-3-portable-power-station |  |
| EcoFlow DELTA Pro Ultra | 57 / 100 | 6144 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-ultra | 7200 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-ultra | 82.4 kg. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-ultra | 5600 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-ultra | 30000 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-ultra |  |
| EcoFlow DELTA Pro Ultra X | 80 / 100 | 12288 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-ultra-x | 12000 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-ultra-x | 135.5 kg. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-ultra-x | 10000 W. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-ultra-x | 61440 Wh. Show sourceclaimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-ultra-x |  |
Manufacturer-claimed unless marked verified. Select a dotted reading to inspect its source and date. Max expanded capacity includes the station and supported expansion batteries; check the model review for the required configuration. N/A means no sourced maximum. Score methodology is published separately.
03
What changes the decision
These callouts use only the complete, sourced readings available for every candidate. Open the full model page before buying for all specifications and source notes.
Start with these measurable differences
Lightest sourced weight
12 kg
EcoFlow DELTA 2 →Source: https://ecoflow-service-us-prod.oss-us-west-1.aliyuncs.com/cms/manual/1726036585595/DELTA%202%20USER%20MANUAL.pdf · 2026-07-10
Highest sourced AC output
12000 W
EcoFlow DELTA Pro Ultra X →Source: https://us.ecoflow.com/products/delta-pro-ultra-x · 2026-07-04
04
Explore the model reviews
Open a model review for our verdict, runtime estimates, complete specifications and source notes. Check current availability at the retailer before buying.
EcoFlow
DELTA 2- Usable AC energy
895 Whverified. Show source
verified source~890-900Wh usable AC (~86-90% conversion) vs 1024Wh rated (Portable Power Lab, 6-month test)2026-07-04- Continuous AC output
1800 W. Show source
claimed sourceus.ecoflow.com2026-07-10https://us.ecoflow.com/products/delta-2-portable-power-station
EcoFlow
DELTA 3- Usable AC energy (est.)
870 Whest.. Show source
estimated sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station- Continuous AC output
1800 W. Show source
claimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-portable-power-station
EcoFlow
DELTA 3 Classic (1024Wh)- Usable AC energy (est.)
870 Whest.. Show source
estimated sourcemanuals.ecoflow.com2026-07-27https://manuals.ecoflow.com/eu/product/delta-3-classic?lang=en_US- Continuous AC output
1800 W. Show source
claimed sourcemanuals.ecoflow.com2026-07-27https://manuals.ecoflow.com/eu/product/delta-3-classic?lang=en_US
EcoFlow
DELTA 3 Plus- Usable AC energy (est.)
870 Whest.. Show source
estimated sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station- Continuous AC output
1800 W. Show source
claimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-plus-portable-power-station
EcoFlow
DELTA 2 Max- Usable AC energy (est.)
1741 Whest.. Show source
estimated sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-2-max-portable-power-station- Continuous AC output
2400 W. Show source
claimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-2-max-portable-power-station
EcoFlow
DELTA 3 Max- Usable AC energy (est.)
1741 Whest.. Show source
estimated sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-max-series-portable-power-station?view=d3m- Continuous AC output
2400 W. Show source
claimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-3-max-series-portable-power-station?view=d3m
EcoFlow
DELTA 3 Max Plus (2048Wh)- Usable AC energy (est.)
1741 Whest.. Show source
estimated sourceecoflow.com2026-07-27https://www.ecoflow.com/us/delta-3-max-plus-portable-power-station/specs- Continuous AC output
3000 W. Show source
claimed sourceecoflow.com2026-07-27https://www.ecoflow.com/us/delta-3-max-plus-portable-power-station/specs
EcoFlow
DELTA 3 Ultra- Usable AC energy (est.)
2611 Whest.. Show source
estimated sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/ecoflow-delta-3-ultra-portable-power-station-3072wh- Continuous AC output
3600 W. Show source
claimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/ecoflow-delta-3-ultra-portable-power-station-3072wh
EcoFlow
DELTA Pro 3- Usable AC energy
3790 Whverified. Show source
verified source3790Wh usable at >93% efficiency (OutdoorGearLab) vs 4096 rated2026-07-04- Continuous AC output
4000 W. Show source
claimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-3-portable-power-station
EcoFlow
DELTA Pro Ultra- Usable AC energy (est.)
5222 Whest.. Show source
estimated sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-ultra- Continuous AC output
7200 W. Show source
claimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-ultra
EcoFlow
DELTA Pro Ultra X- Usable AC energy (est.)
10445 Whest.. Show source
estimated sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-ultra-x- Continuous AC output
12000 W. Show source
claimed sourceus.ecoflow.com2026-07-04https://us.ecoflow.com/products/delta-pro-ultra-x
Frequently asked
- Is the newer DELTA generation always the better buy?
- On sourced specification the newer generation in our data is consistently better on surge, rated cycles, and charge time at the same capacity — with the DELTA 3 Classic as the reminder that a newer name can also be a stripped variant. Our score is deliberately price-independent, so it answers which unit is better, not which is the better buy on the day you look.
- How large a DELTA do I need for home backup?
- That is a load question, not a family question, and guessing it by model name is how people overbuy. Size against the devices you actually intend to run and for how long, then check the surge rating against anything with a motor or compressor.
- Which DELTA Pro specifications should I compare: Pro 3, Ultra, or Ultra X?
- Start with the complete model name and the exact bundle. DELTA Pro 3 is a portable main unit with optional extra batteries; Ultra and Ultra X use separate inverter and battery modules. Check the included battery count, AC output and usable energy for that configuration. An inverter-only listing and a complete battery kit are different purchases, even when the product name looks similar.
- Can I reuse a DELTA Pro extra battery with another DELTA model?
- Check the exact main unit and battery combination in EcoFlow’s compatibility guidance. The US DELTA Pro 3 FAQ supports the original DELTA Pro Smart Extra Battery with current firmware, but does not support the reverse pairing of a Pro 3 Extra Battery with the original DELTA Pro. It also lists Pro 3 and Pro Ultra as incompatible. Shared DELTA branding is not enough to establish a working connection.
- How do I size a station for my own load?
- Size against the devices and duration you actually need, then leave margin for conversion losses and startup surge. Calculate your size →
- Can I compare two exact models?
- Yes — exact model-vs-model pages own head-to-head decisions and keep those queries separate from this family overview. Open model comparison →
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