What you can expect from the EcoFlow DELTA Pro 3 at home
Warranty5 years
Our score2.9
Ratings5.0 6 reviews
EcoFlow DELTA Pro 3
Not sold at any store we monitor today, so not in our ranking.
Which robot is right for your home? Find out in 7 questions →
Who it suits
Good for
- No panels: charges from the grid at up to 2,900 W
- Keep power during a cut: keeps chosen circuits running during a cut
- I plug it in myself: plugs into a wall socket
- In a shed or garage: charges down to 32 °F
Not for
- Outdoors: for indoors only
From the facts the maker states, by the rules of our advisor.
Before you buy, compare it with 2 recommended alternatives ?
Green is the best of these 3, also when they share the lead.
| This model EcoFlow DELTA Pro 3 Best on 1 fact | Cheapest of the top 10 Bluetti Apex 300 Best on 2 facts | Highest score here Anker SOLIX E10 Best on 4 facts | |
|---|---|---|---|
| Most important facts | |||
| The lowest price today at a store that ships to you, shipping included. A price with an asterisk comes from a store abroad, and its shipping cost is our own estimate. Lowest price | – | $1,499Bluetti (brand store) best | $4,299Anker SOLIX (brand store) |
| Our own score out of 10: 70% the maker’s facts and 30% store ratings. Price does not count. Score | best | ||
| The average of the stars buyers give at the stores, with the number of reviews behind it. We only compare it from 20 reviews. Customer rating | – | – | – |
| The cells’ full capacity, before the reserve the battery keeps. The usable capacity is the figure to compare. In this comparisonSource
| 4.1 kWh | 2.8 kWh | 6.1 kWh best |
| How far the system grows with extra batteries, in usable capacity. In this comparisonSource
| 36 kWh best | – | 30 kWh |
| The most power the battery ships to your home without a break, as the maker states it. In this comparisonSource
| 4,000 W | 3,840 W | 7,600 W best |
| The most solar power the battery takes in directly from panels. In this comparisonSource
| 2,600 W | 2,400 W | 9,000 W best |
| How many full charge cycles the maker rates the cells for. In this comparisonSource
| 4,000 | 6,000 best | 4,000 |
| How many years the maker’s warranty on the battery runs. In this comparisonWhen it matters
When it matters less
Source
| 5 years | 5 years | 5 years |
| What the battery powers during a power cut: nothing, a device at its own socket, chosen circuits, or the whole home. Source
| Selected circuits | Selected circuits | Selected circuits |
EcoFlow DELTA Pro 3 specifications ?
Product on the market since August 2024
Kind of system 1 fact
- Kind of system
How the battery connects to your home: to a socket, to a balcony solar system, through a hybrid inverter, on the AC side of an installed system, as a module for an inverter, or as a portable power station.
Source: derived, no source of its own · checked on Nov 2
- Power station
Capacity 4 facts
- Nominal capacity
The cells’ full capacity, before the reserve the battery keeps. The usable capacity is the figure to compare.
Among the models we track
4.1 kWh on this model
Lowest
1 kWh Highest
12.3 kWh Middle
2.5 kWhHigher than 28 of the 41 models we track.
Source: de.ecoflow.com · checked on Nov 2
- 4.1 kWh
- Largest configuration
How far the system grows with extra batteries, in usable capacity.
Among the models we track
36 kWh on this model
Lowest
6.7 kWh Highest
61.4 kWh Middle
15 kWhHigher than 35 of the 40 models we track.
Source: us.ecoflow.com · checked on Nov 13
- 36 kWh
- Batteries per system, at most
How many battery units one system takes.
Among the models we track
6 on this model
Lowest
1 Highest
6 Middle
5Higher than 29 of the 40 models we track.
Source: us.ecoflow.com · checked on Nov 13
- 6
- Expansion battery
The extra battery the maker sells to add capacity.
Source: de.ecoflow.com · checked on Nov 2
- DELTA Pro 3 Intelligente Zusatzbatterie
Power 4 facts
- AC output
The most power the battery ships to your home without a break, as the maker states it.
Among the models we track
4,000 W on this model
Lowest
800 W Highest
12,000 W Middle
2,400 WHigher than 35 of the 43 models we track.
Source: de.ecoflow.com · checked on Nov 2
- 4,000 W
- Peak output
The power it delivers for a short time, such as when a device starts up.
Among the models we track
8,000 W on this model
Lowest
1,200 W Highest
14,400 W Middle
6,360 WHigher than 10 of the 12 models we track.
Source: de.ecoflow.com · checked on Nov 2
- 8,000 W
- AC charging power
How fast the battery charges from the grid.
Among the models we track
2,900 W on this model
Lowest
800 W Highest
4,000 W Middle
2,050 WHigher than 23 of the 30 models we track.
Source: de.ecoflow.com · checked on Nov 2
- 2,900 W
- Phases
Whether the battery connects to one phase or to all three.
Source: us.ecoflow.com · checked on Nov 13
- Split phase
Solar input 3 facts
- Coupling
Where the battery connects to the solar system: on the DC side, between the panels and the inverter, or on the AC side, behind the inverter.
Source: derived, no source of its own · checked on Nov 2
- AC and DC
- Solar input
The most solar power the battery takes in directly from panels.
Among the models we track
2,600 W on this model
Lowest
0 W Highest
10,000 W Middle
2,200 WHigher than 21 of the 34 models we track.
Source: de.ecoflow.com · checked on Nov 2
- 2,600 W
- Highest solar voltage
The highest voltage the solar input takes. A string of panels must stay below it, on a cold day too.
Among the models we track
150 V on this model
Lowest
55 V Highest
600 V Middle
60 VHigher than 16 of the 20 models we track.
Source: de.ecoflow.com · checked on Nov 2
- 150 V
Battery life and warranty 4 facts
- Cell chemistry
The cells’ chemistry. LFP cells last many cycles and are less prone to overheating than NMC cells.
Source: de.ecoflow.com · checked on Nov 2
- Lithium iron phosphate (LFP)
- Rated cycles
How many full charge cycles the maker rates the cells for.
Among the models we track
4,000 on this model
Lowest
3,000 Highest
10,000 Middle
6,000Lower than 32 of the 39 models we track.
Source: de.ecoflow.com · checked on Nov 2
- 4,000
- Capacity after the rated cycles
The share of capacity the maker says is left after the rated cycles.
Among the models we track
80 % on this model
Lowest
60 % Highest
80 % Middle
70 %Higher than 16 of the 21 models we track.
Source: de.ecoflow.com · checked on Nov 2
- 80 %
- Warranty
How many years the maker’s warranty on the battery runs.
Among the models we track
5 years on this model
Lowest
5 years Highest
12 years Middle
10 yearsLower than 36 of the 45 models we track.
When it matters
- A battery you buy to keep for ten years or more.
- A large and expensive system, where a failed cell costs a lot to replace.
When it matters less
- A small portable station you are likely to replace sooner hardly needs the extra years.
Source: de.ecoflow.com · checked on Nov 2
- 5 years
Backup power 4 facts
- Backup power
What the battery powers during a power cut: nothing, a device at its own socket, chosen circuits, or the whole home.
Source: de.ecoflow.com · checked on Nov 2
- Selected circuits
- Switchover time
How long the power is off before the backup takes over. The shorter, the more devices keep running.
Among the models we track
10 ms on this model
Lowest
0 ms Highest
20 ms Middle
15 msLower than 10 of the 19 models we track.
Source: de.ecoflow.com · checked on Nov 2
- 10 ms
- Off-grid use
Whether the system runs without any grid connection.
13 of the 16 models we track have this.
Source: de.ecoflow.com · checked on Nov 2
- yes
- Backup hardware
The extra box or switch the maker needs for backup power, where it is sold separately.
Source: de.ecoflow.com · checked on Nov 2
- EcoFlow Manueller Umschalter (Manual Transfer Switch), installed by a certified electrician
Smart features 1 fact
- Connectivity
How the battery connects to your network or the app.
Source: de.ecoflow.com · checked on Nov 2
- Wi-Fi, Bluetooth
Build and placement 7 facts
- Placement
Where the maker allows the battery to stand.
Source: de.ecoflow.com · checked on Nov 2
- Indoors
- Protection rating (IP)
How well the case keeps out dust and water. A battery that stands outdoors needs a higher rating.
Source: de.ecoflow.com · checked on Nov 2
- IP20
- Lowest operating temperature
The coldest temperature at which the battery works.
Among the models we track
-10 °C on this model
Lowest
-20 °C Highest
-10 °C Middle
-20 °CHigher than 30 of the 31 models we track.
Source: de.ecoflow.com · checked on Nov 2
- -10 °C
- Highest operating temperature
The warmest temperature at which the battery works.
Among the models we track
45 °C on this model
Lowest
45 °C Highest
60 °C Middle
55 °CLower than 29 of the 31 models we track.
Source: de.ecoflow.com · checked on Nov 2
- 45 °C
- Lowest charging temperature
The coldest temperature at which the battery still charges. Many cells may not charge below 0 °C without heating.
Among the models we track
0 °C on this model
Lowest
-20 °C Highest
0 °C Middle
0 °CHigher than 7 of the 19 models we track.
Source: de.ecoflow.com · checked on Nov 2
- 0 °C
- Weight
The weight of the battery, or of one unit for a battery built from several.
Among the models we track
113.5 lb (51.5 kg) on this model
Lowest
10.4 lb (4.7 kg) Highest
180.8 lb (82 kg) Middle
57.9 lb (26.25 kg)Higher than 33 of the 40 models we track.
When it matters
- Carrying a portable station to the garden, the car or the campsite.
- A wall or a balcony railing that has to bear the battery.
When it matters less
- A floor-standing system that is installed once and stays put.
Source: de.ecoflow.com · checked on Nov 2
- 113.5 lb (51.5 kg)
- Noise
How loud the battery is while it runs, as the maker states it.
Among the models we track
30 dB on this model
Lowest
30 dB Highest
43 dB Middle
30 dBLower than 3 of the 14 models we track.
When it matters
- A battery in a hallway, a living room or next to a bedroom.
- A model with a fan that runs while it charges at full power.
When it matters less
- In a garage or a cellar nobody hears it.
Source: de.ecoflow.com · checked on Nov 2
- 30 dB
Installation 1 fact
- Installation
Whether you set the battery up yourself or an electrician has to connect it.
Source: de.ecoflow.com · checked on Nov 2
- Plug and play
Certificates and grid codes 1 fact
- Certificates and grid codes
The safety standards and grid codes the maker states the battery meets.
Source: us.ecoflow.com · checked on Nov 13
- UL 9540
Sources: de.ecoflow.com · us.ecoflow.com
Our score
Confidence: medium. Fewer than 300 owners’ ratings at the stores. The highest score today is 4.5.
-
Owners’ ratings 30%–
Owners’ ratings, 30%: none yet at the stores that ship to the United States, so this part is left out and the score is the features part alone.
-
Features 70%2.9
26.195714285714285 of 90 points for the maker’s facts, the other 10 counted at the market’s average share of 32%.
- Price never countsA sale can’t lift a model. Today’s lowest price sits beside the score, checked every morning.
- Too few facts, no rankOnly home batteries whose kind and key facts are known are ranked. The rest get a provisional score.
- Reviewers beside, not insideReviewers’ picks are shown next to the score and do not count in it.
Ratings at the stores
Buyers rate the EcoFlow DELTA Pro 3 5.0 out of 5, from 6 reviews at 2 stores (Kaufland.de DE, Solar Power Supply DE). We read the ratings on November 14, 2026.
5.0 out of 5. 6 reviews from 2 stores in 1 country
By country
- Germany, 2 stores 5.0 (5.0 out of 5) · 6 reviews
The bar is the country's share of the reviews.
| Store | Rating | Reviews | Read |
|---|---|---|---|
| Kaufland.de DE | 5.0 (5.0 out of 5) | 4 | Nov 14 |
| Solar Power Supply DE | 5.0 (5.0 out of 5) | 2 | Nov 14 |
How we combine them. Each store counts once, with its biggest listing of this model, and its rating weighs by its number of reviews.
Not counted: Amazon (its terms do not allow us to show its ratings).
The maker
EcoFlow
- Reviews on Trustpilot
- Founded in 2017
EcoFlow makes portable power stations, solar equipment and home energy storage, and was started in 2017 by a group of battery engineers. The company says it has regional headquarters in the USA, Germany and Japan. Its home batteries include the STREAM Ultra and the STREAM Ultra X, alongside the DELTA Pro 3 power station.
