EcoFlow DELTA 3 Ultra
- AC delivered · est.
2,611 Wh. Show source
estimated sourceus.ecoflow.com ↗2026-07-04- output
3,600 W. Show source
claimed sourceus.ecoflow.com ↗- surge
7,200 W. Show source
claimed sourceus.ecoflow.com ↗- weight
32.7 kg. Show source
claimed sourceus.ecoflow.com ↗- recharge
89 min. Show source
claimed sourceus.ecoflow.com ↗
Balanced
#7 of 13
in the XL / home-backup class
Lifted by Output & versatility and Durability & longevity; held back by capacity & expansion.
Check current availability and pricing at the retailer.
Check price on AmazonSee alternatives to the EcoFlow DELTA 3 Ultra →At a glance
EcoFlow DELTA 3 Ultra is a xl / home-backup model best suited to cpap traveler. It supplies 3,600 W of continuous AC output. BatteryRank scores it 60 out of 100 within its size class.
Our verdict on the EcoFlow DELTA 3 Ultra
The DELTA 3 Ultra is built around recharge speed rather than storage. 3,072 Wh is unremarkable at this size, but refilling it from a wall socket takes 89 minutes, which is faster than several units holding a third as much. Add split-phase 240 V and a 10 ms switchover and the design intent is clear: a unit that spends its life plugged in, absorbing outages and recovering before the next one. The 800 W solar ceiling is the number that does not fit.
- Your grid is unreliable in bursts rather than out for daysAn 89-minute full recharge means a single restored hour and a half returns the whole 3,072 Wh, which is the behaviour that matters when power flickers repeatedly.
- You have equipment that cannot tolerate a gap in supplyThe 10 ms switchover is fast enough for desktop computers and networking gear, which typically ride through anything under about 20 ms without restarting.
- You need 240 V but not 60 kg of hardwareSplit-phase output at 32.7 kg is unusual — most units offering it in our catalog are substantially heavier.
- You intend to run it off-grid on solarThe 800 W solar ceiling is the weak point of this design — lower than the 1,000 W the half-size DELTA 3 Max Plus accepts, and it takes most of a clear day to move 3,072 Wh. The DELTA Pro Ultra holds 6,144 Wh and takes 5,600 W of solar rather than 800 W.
- The unit needs to move with you regularly32.7 kg with split-phase hardware inside is a stationary-appliance weight, and the fast recharge that justifies it only helps where there is a socket. The DELTA 3 Max Plus is 22.1 kg while keeping a 3,000 W inverter.
The honest limit: EcoFlow leads with charging speed and the 89-minute figure holds up, but fast AC charging is not free. Pushing that much power into a pack quickly generates heat, which is why fan behaviour during a rapid refill is a common owner complaint across this product family. We hold no noise figure for this unit, so we cannot tell you how loud that gets in a room you occupy.
What our data can’t tell you: The 4,000-cycle rating here is quoted to 80 percent of original capacity while several Jackery units in the same class quote to 70 percent — a looser threshold that makes their numbers look better than a like-for-like comparison would. We also hold no noise reading, no dimensions and no maximum expansion figure for this model.
BatteryRank Engineering Team · Last reviewed · Method
Capacity truth
The watt-hour number on the box isn't what reaches your devices. Rated on the label vs what actually leaves an outlet.
3,072 Wh. Show source
claimed sourceus.ecoflow.com ↗2026-07-04The marketing number — total cell capacity.
2,611 Wh. Show source
estimated sourceestimate = battery-side usable capacity × 85% inverter efficiencyWhat reaches an AC outlet — about 15% is lost turning battery power into household AC. How we estimate.
Also independently measured
- AC charge time
89 min. Show source
verified source~89 min AC (OEM 1.48h)2026-07-04
~89 min AC (OEM 1.48h)
What it can run
Same sourced device assumptions used by our calculators, applied to this model's usable AC energy. Actual runtime varies with load, temperature, and standby draw.
| Device | Estimated runtime | Sourced assumption |
|---|---|---|
| CPAP (humidifier off) | about 36.3 nights | 9 W · |
| CPAP (heated humidifier on) | about 5.8 nights | 56 W · |
| Refrigerator (full-size) | about 41 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 145 hours | 18 W · |
| Laptop (65W charger) | about 80 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 130 full charges | 20 W · |
Who it fits
Mechanical matches against this model's own sourced specs — never invented sentiment, never a guess on a spec we don't have.
2611 Wh AC-delivered (est.) → multiple CPAP nights per charge
3600 W inverter, 2611 Wh AC-delivered (est.) → runs a fridge through an outage
3072 Wh, expandable, 12V DC out → long off-grid stays
How it scores
Four buyer pillars over seven sub-scores — computed from sourced data with a published formula, price-independent by design.
Power
Battery-side usable capacity and how much you can run at once.
Usable watt-hours and how far you can grow it with add-on batteries, versus its size class.
Continuous and surge wattage, outlet count, and USB-C fast-charging.
Trust
Owner reputation, safety record, warranty, and build durability.
Owner ratings, brand reputation, recall record, and warranty backing.
Rated cycle life, warranty length, cell chemistry, and weather sealing.
Charging
est.Wall and solar recharge speed.
Wall recharge speed, solar input, and multi-source charging.
Livability
62% dataLightweight, portable, and quiet enough to live with.
Weight, footprint, handle, and wheels, versus its size class.
Fan noise under load — quieter is better for bedrooms and CPAP use.
How this score is computed
The BatteryRank score is computed from sourced data with a published formula — ranked by data, not lab testing. Seven sub-scores blend into a 0–100 composite, grouped into four buyer pillars. Price is deliberately not a scoring input: prices move daily, so value intelligence lives in the price section above, judged against this model's own history.
| Pillar | Built from |
|---|---|
| Power | Capacity & expansion + Output & versatility |
| Trust | Trust & reliability + Durability & longevity |
| Charging | Charging & solar |
| Livability | Portability + Quiet / livability |
Scores are cohort-relative — each model is ranked against others in its size class. Missing inputs renormalize out rather than scoring zero (a model is never penalized for a spec nobody in its class publishes), and any figure resting on a documented estimate is tagged est. A full methodology page is coming.
Full specifications
Manufacturer-claimed unless marked verified (FCC/UL/DOE/lab). Tap or focus a figure to view its source.
Capacity & battery
- Battery-side usable capacity
3,072 Wh. Show source
claimed sourceus.ecoflow.com ↗- Rated cycle life
4,000 cycles. Show source
claimed sourceus.ecoflow.com ↗- Battery chemistry
LiFePO4. Show source
claimed sourceus.ecoflow.com ↗- Rated capacity
3,072 Wh. Show source
claimed sourceus.ecoflow.com ↗- Cycle-life threshold
80 %. Show source
claimed sourceus.ecoflow.com ↗
Energy available from the battery before output-conversion losses. AC-delivered capacity is shown separately in Capacity Truth.
How many full charge-and-drain cycles before the battery drops to its rated threshold (shown alongside — brands rate to different thresholds, so never compare bare cycle counts).
The type of battery cell. LiFePO4 (LFP) cells last far more cycles and are more thermally stable than older lithium-ion (NMC) cells.
The battery's nameplate energy capacity — the headline number on the box. Battery-side usable and AC-delivered capacity are shown separately.
The remaining-capacity level the cycle rating is measured to. 3,000 cycles to 80% is a stronger battery than 3,000 cycles to 70% — always read the two numbers together.
Power output
- Continuous power output
3,600 W. Show source
claimed sourceus.ecoflow.com ↗- Surge power output
7,200 W. Show source
claimed sourceus.ecoflow.com ↗- AC outlets
5 outlets. Show source
claimed sourceus.ecoflow.com ↗- USB-A ports
1 ports. Show source
claimed sourceus.ecoflow.com ↗- USB-C ports
3 ports. Show source
claimed sourceus.ecoflow.com ↗- USB-C max output
140 W. Show source
claimed sourceus.ecoflow.com ↗- 12V car ports
1 ports. Show source
claimed sourceus.ecoflow.com ↗- DC barrel ports
0 ports. Show source
claimed sourceus.ecoflow.com ↗- Max combined output
3,600 W. Show source
claimed sourceus.ecoflow.com ↗
The most power you can draw at once, sustained — this has to be higher than the running wattage of whatever you're plugging in.
A brief power spike the unit can absorb when a device first switches on — matters for things with motors or compressors, like fridges.
How many standard wall-style outlets are built in.
How many USB-A ports are built in, for charging older phones, lights, and accessories.
How many USB-C ports are built in — check the per-port wattage below if you need fast charging for a laptop.
The fastest a single USB-C port can charge a device — relevant for laptops and fast-charging phones.
How many car-socket (cigarette-lighter) style 12V outputs are built in — what CPAPs and car fridges plug into for the most efficient overnight running.
How many round barrel-style DC outputs are built in, used by routers, some lights, and older electronics.
The most power the unit can deliver across ALL ports at the same time — can be lower than the AC rating plus every USB port added up.
Charging & solar
- AC charge time (0–100%)
89 min. Show source
claimed sourceus.ecoflow.com ↗- Max solar input
800 W. Show source
claimed sourceus.ecoflow.com ↗
How long a full recharge takes from a wall outlet, start to finish.
The most solar panel wattage the unit can accept — undersized panels just mean slower charging, not damage, but oversizing this is wasted money.
Reliability & durability
- UPS switchover time
10 ms. Show source
claimed sourceus.ecoflow.com ↗
How fast the unit takes over when grid power cuts out. Under ~20ms is fast enough that most electronics — including many CPAP machines — won't even blip.
Size & portability
- Weight
32.7 kg. Show source
claimed sourceus.ecoflow.com ↗
How much the unit weighs on its own, without accessories — relevant for portability and carrying it up stairs during an outage.
What reviewers & owners report
Named outlets and marketplaces, each rating credited where it was published.
- 3kWh LFP with 3600W/7200W surge — Across reviewers ·
- 240V whole-home capable (dual-unit + Smart Home Panel 2) — Across reviewers ·
- fast ~1.5h charge — Across reviewers ·
- expandable — Across reviewers ·
- quiet (<=25dB) — Across reviewers ·
- 140W USB-C — Across reviewers ·
- 5-yr (3+2) — Across reviewers ·
- heavy (~32.7kg) — Across reviewers ·
- premium price — Across reviewers ·
- only 1 USB-A — Across reviewers ·
- solar capped 800W — Across reviewers ·
- whole-home needs extra panel + install — Across reviewers ·
- Wirecutter: none
- Popular Mechanics: none
- covered as EcoFlow whole-home/240V-capable 3kWh — YouTube reviewers ·
- no single measured consensus captured — YouTube reviewers ·
Brand reputation: 2025 flagship-ish home unit; Amazon 4.5/127. DELTA 3 family well-regarded. Brand-level: EcoFlow DELTA Max 2000 (EFD310) fire recall 2025-10 (older separate product)
Sources: us.ecoflow.com/products/ecoflow-delta-3-ultra-portable-power-station-3072wh (on-page Specs) accessed 2026-07-04; amazon.com/dp/B0FQVBFLHL accessed 2026-07-04; saferproducts.gov (EcoFlow) checked 2026-07-04
What else to consider instead of the EcoFlow DELTA 3 Ultra
Same or adjacent size class, ordered by the price-independent composite. Every alternative is better than the EcoFlow DELTA 3 Ultra at something and worse at something else, so each row states both halves — each one arithmetic on two sourced readings, with a dimension skipped rather than guessed when either side is missing a figure.
- EcoFlow DELTA Pro 3score 76 · same size class
- Why you would switch
- The EcoFlow DELTA Pro 3 delivers 45% more usable AC energy (3,790 Wh vs 2,611 Wh).
- What you give up
- The EcoFlow DELTA 3 Ultra is 37% lighter (32.7 kg vs 51.5 kg).
- Bluetti Apex 300score 71 · same size class
- Why you would switch
- The Bluetti Apex 300 takes 200% more rated solar input (2,400 W vs 800 W) for off-grid recharging.
- What you give up
- The EcoFlow DELTA 3 Ultra is 14% lighter (32.7 kg vs 38 kg).
- Jackery HomePower 3600 Plusscore 66 · same size class
- Why you would switch
- The Jackery HomePower 3600 Plus delivers 17% more usable AC energy (3,046 Wh vs 2,611 Wh).
- What you give up
- The EcoFlow DELTA 3 Ultra reaches a full AC charge in 89 minutes against 150.
- Anker SOLIX F3800 Plusscore 65 · same size class
- Why you would switch
- The Anker SOLIX F3800 Plus delivers 25% more usable AC energy (3,264 Wh vs 2,611 Wh).
- What you give up
- The EcoFlow DELTA 3 Ultra is 47% lighter (32.7 kg vs 62 kg).
- Anker SOLIX F3800score 62 · same size class
- Why you would switch
- The Anker SOLIX F3800 delivers 25% more usable AC energy (3,264 Wh vs 2,611 Wh).
- What you give up
- The EcoFlow DELTA 3 Ultra is 45% lighter (32.7 kg vs 60 kg).
Quick answers
Each answer restates a sourced figure from elsewhere on this page — nothing new, nothing guessed.
- How much does the EcoFlow DELTA 3 Ultra weigh?
- 32.7 kg (72.1 lb), manufacturer-claimed, without accessories.
- What are the dimensions of the EcoFlow DELTA 3 Ultra?
- 626 × 328 × 395 mm (24.6 × 12.9 × 15.6 in), length × width × height, manufacturer-claimed.
- How much capacity does the EcoFlow DELTA 3 Ultra deliver through an AC outlet?
- About 2,611 Wh of the rated 3,072 Wh reaches an AC outlet from a full charge — an estimate after our published 15% inverter-loss constant (marked est. on this page).
- How long does the EcoFlow DELTA 3 Ultra take to charge?
- 1 h 29 min from a wall outlet, 0 to 100%, manufacturer-claimed. Fast-charge modes and solar input differ — see the charging specs on this page.
- How many watts can the EcoFlow DELTA 3 Ultra output?
- 3,600 W continuous AC output and 7,200 W surge output, manufacturer-claimed. Appliance startup demand must stay within the relevant limit.
- How much solar input can the EcoFlow DELTA 3 Ultra accept?
- 800 W maximum solar input, manufacturer-claimed. Actual harvest depends on panel compatibility, sun, orientation, temperature, and conversion losses.
- What is the cycle-life rating of the EcoFlow DELTA 3 Ultra?
- 4,000 cycles to 80% remaining capacity, manufacturer-claimed. A cycle rating is not a calendar-life guarantee.
- Can the EcoFlow DELTA 3 Ultra work as a UPS?
- Its manufacturer-claimed transfer time is 10 ms. Confirm that your connected equipment tolerates that transfer time; this is not the same as a zero-transfer online UPS.
Keep exploring
- Refrigerator runtime guide
- CPAP nights-per-charge calculator
- How Many Watts Does a Chest Freezer Use?
- How Many Watts Does a 12V Camping Fridge Use?
- How Many Watts Does an RV Refrigerator Use?
- How Many Watts Does an Electric Cooler Use?
- Portable Power for a 12-Hour Outage
- Portable Power for a One-Day Outage
- Power a Refrigerator, Wi-Fi, and Lights
- Complete CPAP Overnight Power Kit
- Complete Refrigerator Outage Kit