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Power station

EcoFlow DELTA Pro 3

The short answer

This is a 4,096Wh battery with 4,000W of output, which means it stores about 3,482 watt-hours you can actually use and can run anything drawing up to 4,000 watts at once.

It runs indoors and makes no fumes. Of the 15 household loads we track, it can handle 16. It would keep a refrigerator going for 5.0–34.8 hours.

Check you have the right model

EcoFlow sells other models that can be mistaken for this one:

  • EcoFlow DELTA 3 Plus — they differ by a single word: PLUS against PRO. peak output 3,600W instead of 8,000W.
  • EcoFlow DELTA 3 — one extra word: PRO. peak output 3,600W instead of 8,000W.
  • EcoFlow DELTA Pro — one extra word: 3. peak output 7,200W instead of 8,000W.

Read the full model name off the label on the unit itself, not off the box or the listing. The figures on this page apply only to the exact name in the heading above.

EcoFlow DELTA Pro 3

Specs from the maker, checked against 9,944 US safety recalls. Anything we could not confirm is marked.

Judged in: The best portable power stations for home backup; The home-backup class: DELTA Pro 3, SOLIX F3800, Explorer 5000 Plus and the rest; The best portable power stations for a gas furnace; Anker SOLIX F3800 vs F3800 Plus: the real differences (compared).

What it can run

LoadDrawRuntimeVerdict
Wi-Fi router and modem 15–40W 87.0–232.1h Will work
Phone charging and small USB devices 10–40W 87.0–348.2h Will work
A few LED lights 15–80W 43.5–232.1h Will work
Laptop and monitor 45–150W 23.2–77.4h Will work
CPAP 30–100W 34.8–116.1h Will work
Refrigerator/freezer 100–700W 5.0–34.8h Might work
Chest freezer 80–500W 7.0–43.5h Might work
Gas-furnace blower 400–1,200W 2.9–8.7h Might work
Sump pump 700–1,500W 2.3–5.0h Might work
Well pump 700–2,000W 1.7–5.0h Might work
Window air conditioner 500–3,250W 1.1–7.0h Might work
Microwave 800–1,800W 1.9–4.4h Will work
Coffee maker 700–1,500W 2.3–5.0h Will work
Television 40–250W 13.9–87.0h Will work
Garage door opener 300–800W 4.4–11.6h Will work
12 V compressor fridge (camping) 25–110W 31.7–139.3h Will work

The two numbers are how long it lasts if your appliances are efficient, and if they are not. Sized over a 24-hour outage.

Living with it

What the maker’s own pages and manual say about owning this unit, and what owners report in public. Each line links to where it was read. Nothing here is our own test.

Switchover when the grid drops
10 ms (maker-stated standby UPS transfer time); real-world testing found the transfer can still trip sensitive electronics despite this spececoflow.ie
Pass-through charging
Maker claims stable, uninterrupted 120/240V output up to 4000W continuous even while charging (pass-through/bypass mode). Note: the manual's own AC Input spec caps US Bypass Mode at 100-120V~15A (~1,800W) for 3 hours max, 12A (~1,440W) continuous after that — and owner testing corroborates a much lower real-world bypass ceiling.us.ecoflow.com
Wall recharge
0→80% in ~50 minutes (maker claim, likely reflecting max combined multi-charge combo up to 7,000W, not AC-only). Manual lists the standard AC Input Socket at just 15A (~1,800W at 120V), which is far slower than the headline figure. Independent testers measured a full AC-only recharge at roughly 2h54m to ~3 hours in practice.us.ecoflow.com
AC input
Standard AC Input Socket (wall outlet): 100-240V, 15A max (~1,800W at 120V US). Separate EcoFlow-proprietary AC POWER IN/OUT port charges at 100/200V-120/240V, 20A (up to ~4,800W at 240V), used in combination with solar/other inputs for the maker's faster multi-charge combos.ecoflow.ie
USB-C
100W max per USB-C port (PD3.0), 200W total across both USB-C portsecoflow.ie
Outlets and ports
US AC output: 4x NEMA 5-20R (120V/20A), 1x NEMA TT-30R (120V/30A), 1x NEMA L14-30R (120/240V/16.7A), 1x NEMA 6-20R (240V/16.7A). USB: 2x USB-A QC3.0 (18W each, 36W total), 2x USB-C PD3.0 (100W each, 200W total). 12V DC output 378W total via DC5521 (5A max) and Anderson (30A max) ports. Plus: 1x EcoFlow-proprietary AC POWER IN/OUT port, 1x High-PV XT60 solar input, 1x Low-PV/Car XT60i input, 1x REMOTE RJ45 port, 1x Extra Battery port. No dedicated 12V cigarette-lighter-style output port.ecoflow.ie
Noise
As low as ~30 dB (maker claim, presumably idle/low-fan-speed). Owner testing found it quiet enough under loads up to ~2,000W to run near CPAP machines at night, but fan noise becomes a noticeable high-pitched whine at higher loads.ecoflow.com
Charges between
0°C to 45°C (32°F to 113°F)ecoflow.ie
Runs between
-10°C to 45°C (14°F to 113°F)ecoflow.ie
Cycle life
80%+ State of Health retained after 4,000 cycles at 0.5C/0.5C charge/discharge rate at 25°C (77°F)ecoflow.ie
Low-load shutoff
AC output auto-shuts-off after an idle timeout (no meaningful load detected for a period), adjustable in the EcoFlow app and settable to "never" for critical continuous loads like refrigerators. This is an idle-timer behavior; the manual does not state an exact default timeout duration or a specific low-wattage threshold that triggers it.ecoflow.ie
App
EcoFlow app (iOS/Android) — companion app for device binding, monitoring, and firmware updates; no distinct branded app name is used beyond "EcoFlow app." EcoFlow PowerInsight is a separate, optional energy-management layer that can integrate with it.ecoflow.ie
Expansion
One proprietary "Extra Battery" port supports up to 2 EcoFlow DELTA Pro 3 Smart Extra Batteries for capacity expansion (4096Wh base, expandable well beyond via extra batteries/parallel units); the port is backwards-compatible with the older DELTA Pro Smart Extra Battery.ecoflow.ie
Size
16.16 x 13.43 x 27.28 in (W x D x H)ecoflow.ie
Weight
113.54 lb (51.5 kg)ecoflow.ie
Warranty
3-year standard warranty plus a 2-year extended warranty (5 years total) if the unit is registered in the EcoFlow app.us.ecoflow.com

What owners report, from public threads and long-term reviews; not our own testing.

  • Reviewers used the unit as their primary backup power source through multiple overnight outages, running a refrigerator, TV, and space heater simultaneously without failure.outdoorgearlab.com
  • In real-world testing a full AC recharge took roughly 3 hours, and the unit ran quietly enough under typical nighttime loads (CPAP machines, heaters) that fan noise went unnoticed, though it became noticeable near maximum output.outdoorgearlab.com
  • One long-term tester experienced repeated software-triggered false 'electrical short' warnings and shutdowns over about 5 weeks of use, each requiring a manual BMS reset (holding the power button for 10 seconds); a firmware update appeared to resolve the recurring error afterward.cleantechnica.com
  • At about 114 lb with a telescoping handle described as wobbly when extended, reviewers say the unit is 'movable' rather than truly portable, and recommend a loading ramp or a second person to get it into a vehicle.robbsutton.com
  • Getting the advertised 2,600W of combined solar input in practice requires two separate arrays wired to the two ports' different voltage specs; one reviewer advises most users should plan around roughly 1,600W of realistic solar input instead.robbsutton.com
  • When running on pass-through/bypass power (plugged into the grid while also powering loads), output is effectively capped around 1,800W in the US — consistent with the manual's own Bypass Mode spec of 100-120V~15A — and one tester found an AC compressor's startup surge (over 2,000W) tripped a shutdown even though the unit handles 4,000W+ fine when running off battery alone.cleantechnica.com
  • A tester reported the UPS/EPS switchover uses a 'floating ground' when running on battery power, which caused a desktop PC's power supply to click off during at least one transfer despite the advertised <10ms switchover time; the suggested workaround is placing a separate UPS between sensitive electronics and the unit.robbsutton.com
  • Despite the 4,000W rating, a 3-ton central AC unit fitted with a soft-start kit still triggered the unit's overload protection during one reviewer's test, raising doubts about its suitability as whole-home backup for large HVAC loads.robbsutton.com
  • The unit cannot output both 120V and 240V simultaneously, which one reviewer flagged as a limitation for some household wiring setups.thesolarlab.com
  • AC recharge in practice ran somewhat longer than advertised in one test (about 2 hours 54 minutes versus a claimed 2 hours 20 minutes), and the display's 'time remaining' estimate stayed inaccurate for an extended stretch near the end of the charge.thesolarlab.com

What independent testers measured

We do not test units ourselves. These are figures published by testers who did, with the maker’s claim beside them where the tester gave it.

MeasurementResultTester
Inverter efficiency, measuredAbout 89% efficiency sustaining a near-maximum (~3,650W) load for 60 minutesThe Solar Lab
Wall charge, empty to fullAbout 2 hours 54 minutes (174 min) full AC charge, tester-measured (maker: 2 hours 20 minutes (140 min) advertised)The Solar Lab
Also measuredSurge test: handled 5,100W for nearly a minute before shutting down as load approached 6,000WThe Solar Lab
Also measuredQualitative noise: quiet under a 2,000W load, more noticeable at higher loads (no dB figure given)The Solar Lab
Also measuredPass-through charging tested and worked correctlyThe Solar Lab
Weight, measured113 lb, noted by the tester as heavier than the original DELTA ProThe Solar Lab
Usable capacity, measured3,790 Wh usable out of the advertised 4,096 Wh rated capacity (>93% efficiency) (maker: 4,096 Wh advertised)OutdoorGearLab
Wall charge, empty to fullNever took more than 3 hours to fully charge in testing (~3.2 hr average)OutdoorGearLab
Weight, measured114.1 lb, listed by OutdoorGearLab as a measured spec in its comparison tableOutdoorGearLab
Solar input achievedAchieved upwards of 1,600W at the highest observed solar charge rate, though typically used under 600WOutdoorGearLab
Also measuredRan overnight with CPAP machines and heaters without testers ever noticing fan noiseOutdoorGearLab
Also measuredAverage measured charging speed of 1,293 Wh/hrOutdoorGearLab
  • Scored 81/100, ranked #2 of 14 power stations tested, and named Best for Home Backup for its power output and expansion capability despite its weight and price. (Best for Home Backup) OutdoorGearLab
  • A solid, worthy power station overall, but an incremental update that existing DELTA Pro owners have little compelling reason to upgrade to. The Solar Lab
  • In a head-to-head against the Anker SOLIX F3800, called the DELTA Pro 3 the better fit for moderate power needs and portability/cycle-life priorities, while the F3800 wins for the heaviest home-backup demands. The Solar Lab

Specifications

Capacity
4,096Wh nameplate · 3,482Wh assumed usable
Continuous output
4,000W
Surge output
8,000W
Output voltage
120/240V
Weight
51.5kg
Solar input
Officially documented · XT60/XT60i ecosystem connector
AC recharge
The US product page does not print an AC input wattage. Not inferred from other DELTA models.
Expansion battery
Up to two DELTA Pro 3 Smart Extra Batteries; backwards compatible with DELTA Pro Smart Extra Battery
Use the current regional manual and approved cable path.
Warranty
5 years
3-year standard warranty plus 2-year extended warranty available upon EcoFlow App registration
Generator recharge
Smart Generator adapter/path described in manual.

Source: EcoFlow product page — captured 2026-08-12

Manual: EcoFlow manual

Recall screen

No published recall names this exact model

The single EcoFlow recall (26010) names DELTA Max 2000, model EFD310. DELTA Pro 3 is not named.

This check cannot clear your own unit. Most recalls cover only certain serial numbers. Read the model and serial number off the label on the unit itself, then check the maker's recall page before you use it, sell it, or buy it.

Manufacturer recall lookup

How we know the screen was not simply blind

Finding nothing only means something if the search could have found something. So we searched the same records for this brand and got 1 recall. That proves the screen can see this brand, so finding nothing for this model is a real result.

[26010 2025-10-09] EcoFlow Technology Recalls Delta Max 2000 Power Stations Due to Risk of Serious Burn Injury and Fire Hazard

Buying the right one

Verified listing — the bare unit

EF ECOFLOW DELTA Pro 3 Portable Power Station, 4096Wh, 4000W AC Output

ASIN B0D14FMFZD · $3,699.00 when checked on 2026-08-13 · purchasable

Title states 4096Wh and 4000W, matching our record exactly. A price is not a product attribute: treat this as the figure at capture time, not today's price.

Check current price

Some links on this page are affiliate links. If you buy through one we may earn a commission, at no extra cost to you. It does not affect which products the planner recommends: rankings come from the sizing rules on our methodology page, and a product with unresolved safety identity is never ranked or linked regardless of commission.

Listings we rejected

Searching for this model returns bundles, sibling models and refurbished units alongside the bare product. These are the ones we checked and did not link, with the reason.

ListingPriceWhy it is not this product
EF ECOFLOW Power Station 4096Wh DELTA Pro 3 with 400W Portable Solar Panel $3,099 Listing is a bundle (solar panel or kit), not the bare base unit our specifications describe.
EF ECOFLOW Portable Power Station 3600Wh DELTA Pro, 120V 3600W AC Output $1,899 Listing title does not contain the model name 'DELTA Pro 3'.
EF ECOFLOW 8kWh Portable Power Station: DELTA Pro 3 with Extra Battery $4,459 Listing is a bundle (solar panel or kit), not the bare base unit our specifications describe.
EF ECOFLOW Delta 3 Portable Power Station, 1024Wh 1800W $629 Listing title does not contain the model name 'DELTA Pro 3'.
EF ECOFLOW 12kWh Portable Power Station: DELTA Pro 3 with 2 Extra Batteries $6,169 Listing title does not state a capacity, so base-unit identity cannot be confirmed.

Official accessories

These are the maker's own words. "Sold on the same page" is not the same claim as "works with this model".

Evidence coverage

What we know about this model, and what we do not. Anything marked as needing confirmation is a job still on our list, not something we are claiming.

manual revision
captured
quick start
captured
solar connector
captured
solar voltage current watt limits
captured
ac charge input
needs confirmation
generator charge policy
captured
expansion battery family and limit
captured
app firmware path
captured
warranty
captured
support
captured
recall adjudication
captured
official accessory edges
captured