Head-to-head test
EcoFlow DELTA 3000 Gen4 vs EcoFlow DELTA Pro UltraHalf the Pro Ultra's Battery and Inverter. Is Half Enough?
It's exactly half a Pro Ultra, half the battery and half the inverter, in a box one person can lift. I'd take the DELTA 4 (3000) for outages that end by morning, unless the house runs something on 240 V or the power stays off for days.
Black Friday · 23 days out
Price to beat:DELTA Pro Ultra $3,989
The lowest we have recorded. A Black Friday price above it is a sale this unit has already had.
Full profiles: EcoFlow DELTA 3000 Gen4 → · EcoFlow DELTA Pro Ultra →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
Gunner’s take
Whole-Home Backup Tester
This is exactly half a Pro Ultra.
The DELTA 4 (3000) holds 3,072 Wh and runs 3,600 W. EcoFlow's DELTA Pro Ultra holds 6,144 Wh and runs 7,200 W. The DELTA 4 (3000) weighs 57.3 lb, and the Pro Ultra weighs 181.8 lb across its boxes, more than three times as much.
The half that matters most is the one you can't add to.
There's no battery port on the DELTA 4 (3000)A6, so 3,072 Wh is all it will ever hold. The bigger DELTA 4 takes extra batteries. This one is sealed, and what you buy on day one is the ceiling.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
So night two depends on the sky. With the grid down, its one 1,000 W solar input is the main way back inA5, and filling 3,072 Wh at that rate takes more than three hours of full sun, which a winter outage rarely hands you. The Pro Ultra ends the first night with 3,577 Wh, enough for two more before anyone looks up.
DELTA 4 (3000): 3,072 Wh, no battery portA68-Hour Blackout (1,645 Wh): the DELTA 4 (3000) ends with 966 Wh, 59% of a second night; the Pro Ultra ends with 3,577 WhDELTA 4 (3000): one solar input, up to 1,000 W at 11 to 60 VA5
Why it mattersIf your outages end by breakfast, the DELTA 4 (3000) is enough. If they run for days in winter, buy the Pro Ultra.
continuous output
They cost less for the same storage too, because each one costs less per watt-hour. But two boxes are two separate 3,600 W supplies on two sets of outlets. Neither has a 240 V outlet, so a well pump or central air that needs the Pro Ultra's inverter still won't run, however many sit beside the panel.
DELTA 4 (3000): 3,072 Wh and 3,600 W at 57.3 lbDELTA Pro Ultra: 6,144 Wh and 7,200 W at 181.8 lb, with one 240 V outletListed prices: $1,699 against $4,199
Why it mattersIf what you need later is more storage on ordinary outlets, a second DELTA 4 (3000) is a real upgrade path. If you need 240 V, it isn't one.
HID is the USB link a computer uses to hear from a UPS that the power has gone. The DELTA 4 (3000) doesn't have itA8, so a desktop on it gets no warning to save and shut down. It runs until the battery is empty and then stops. The Pro Ultra's online design removes the switchover altogetherB3.
DELTA 4 (3000): switches to backup within 10 ms, no HID communicationA8DELTA Pro Ultra: EcoFlow calls it an online UPS and classes its switchover as no-breakB3
Why it mattersIf the thing you're protecting is a computer with unsaved work or a home server, the Pro Ultra is the safer box. A fridge and a router won't notice the difference.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: The Pro Ultra takes the blackout, the workday and van life. The DELTA 4 (3000) takes the two trips that leave the house.
The scenarios split on whether the box leaves the house. The Pro Ultra wins the blackout, the remote workday and van life. The DELTA 4 (3000) wins camping and the tailgate, because 181.8 lb doesn't go to a tailgate. Van life needs 4,685 Wh, and the DELTA 4 (3000) runs 2,074 Wh short with no battery to add.
The blackout row is the one I'd look at hardest. Both finish the 1,645 Wh night. The DELTA 4 (3000) ends with 59% of a second night in hand, and the Pro Ultra ends with two more. If your power is back by morning, that gap never gets used.
Growth Path
Selected because: One of these is sealed at 3,072 Wh. The other starts at 6,144 Wh and takes extra batteries.
solar input
What you buy is the ceiling. The DELTA 4 (3000) has no battery portA6, so if 3,072 Wh turns out small, the fix is a second box, not a bigger one. That's the real catch on my pick. In a house where outages end overnight, it rarely bites.
The Pro Ultra starts at twice the size and keeps going. EcoFlow says a full system reaches 90 kWhB1, a whole-house project nobody weighing it against a 3,072 Wh box needs. The base battery is the real difference. If you already think you'll want more, the bigger DELTA 4 takes extra batteries and this one never will.
Portability & Form Factor
Selected because: 57.3 lb against 181.8 lb, for exactly half the battery.
weight
One of these I'd lift. The other I'd install. At 57.3 lb the DELTA 4 (3000) goes into a trunk by a handle at each end, and EcoFlow calls it the lightest station in its classA7. The Pro Ultra's 181.8 lb comes split across its boxes, and you set it up once by the panel and leave it.
The Pro Ultra's extra 124.5 lb is doing a job. It carries twice the battery and twice the inverter. But if the same box has to go camping in July and run the fridge in January, only one of these makes both trips.
What the Specs Don't Tell You
Selected because: The Pro Ultra surges to 10,800 W against 7,200 W, and EcoFlow classes its switchover as no-break.
rated cycles
For big motors, the Pro Ultra's surge is the number to check. It peaks at 10,800 W against 7,200 W, and only it has a 240 V outlet. A well pump pulls its hardest at switch-on. The DELTA 4 (3000)'s 3,600 W still starts a fridge or a sump pump with room left.
Only one of these is built never to blink. EcoFlow calls the Pro Ultra an online UPSB3, a design that runs the load from the battery all the time. The DELTA 4 (3000) switches over in no worse than 10 ms, and it has no HID linkA8, so a desktop PC on it never learns that the grid is down.
Every port, labelled
What plugs in where, and how much it takes
EcoFlow DELTA 3000 Gen4
Front panel
- 1USB-C · 140 WOutUp to 140 W (USB-PD up to 28 V at 5 A). The port for a laptop.
- 22× USB-C · 65 WOutUp to 65 W each. EcoFlow says these two and the USB-A share 16 W when two or more are in use at once.
- 3USB-A · 36 WOutUp to 36 W (5, 9 or 12 V at 3 A).
- 430 A twist-lockOutA three-slot twist-lock marked 30A MAX, rated 30 A at 120 V on the US unit.
- 54× 20 A outletsOutFour T-slot 120 V outlets rated 20 A each, sharing 3,600 W continuous and a 7,200 W surge.
Photo: EcoFlow · Product image, EcoFlow Japan store · numbers and labels are ours. Ratings from EcoFlow’s US spec table; outlet shapes read by us from EcoFlow’s picture, taken of the Japanese unit, which shares the US panel.
Input side
- 1Solar/DC in · 1,000 WIn11 to 60 V, up to 20 A, 1,000 W.
- 2AC in · 1,800 WIn100–120 V at 15 A. Charges at up to 1,800 W, which at 120 V is the whole of an ordinary 15 A circuit.
No battery port: the 3000 doesn’t take extra batteries.
Photo: EcoFlow · Product image, EcoFlow Japan store · numbers and labels are ours. Ratings from EcoFlow’s US spec table and the panel’s own printing.
EcoFlow DELTA Pro Ultra
Front panel
- 12× USB-C · 100 WOutTwo USB-C ports behind the flap printed USB-C: up to 100 W each, 200 W together.
- 22× USB-A · 12 WOutTwo USB-A ports behind the flap printed USB-A: 5 V at 2.4 A, 12 W each, 24 W together.
The four covers below the screen are printed 120V 20A - BACKUP UPS, 120V 20A - ONLINE UPS, 120V 30A - ONLINE UPS and 120V/240V 30A; the outlets behind them are mapped below. The door at the right end covers the side panel, also mapped below; EcoFlow’s manual puts a port for its 4G dongle behind the left one.
Photo: EcoFlow · Product image, EcoFlow US store · numbers and labels are ours. Port names printed on EcoFlow’s panel; ratings from EcoFlow’s US spec table.
Outlets and side panel
- 14× 20 A outletsOutFour NEMA 5-20 outlets, 120 V at 20 A each. The covers are printed 120V 20A - BACKUP UPS over the left pair and 120V 20A - ONLINE UPS over the right pair: EcoFlow rates online UPS at 0 ms and backup UPS under 20 ms. All the AC outlets share 7,200 W.
- 2TT-30 RV · 30 AOutA TT-30 RV outlet, 120 V at 30 A, printed 120V 30A - ONLINE UPS. A camper’s 30 A cord plugs straight in.
- 3L14-30 · 120/240 VOutA NEMA L14-30 twist-lock, 120/240 V at 30 A, printed 120V/240V 30A. On backup UPS (under 20 ms).
- 412 V DC out · 378 WOutA DC output, 12.6 V at 30 A, 378 W max. EcoFlow’s manual says it supports car-socket (cig lighter) appliances.
- 5Low-PV solar in · 1,600 WInThe low-voltage solar input: 30–150 V at 15 A, up to 1,600 W. EcoFlow includes a cable from MC4 panels to this port.
- 6AC inInThe AC charging inlet: 100–120 V at 15 A, or 200–240 V at 12.5 A. The small switch above it sets the charging speed.
- 7High-PV solar in · 4,000 WInThe high-voltage solar input, with the PV switch that turns solar charging on: 80–450 V at 15 A, up to 4,000 W. MC4 panel leads plug straight in. With the Low-PV input, 5,600 W of solar in all.
- 8Power In/Out · 30 AIn · OutEcoFlow’s Power In/Out port: 120 V or 240 V at 30 A. EcoFlow’s manual lists it for charging from a generator or an EV charger.
- 9Battery portIn · OutConnects the inverter to its battery (cable shown plugged in). One inverter takes up to five batteries, 30 kWh by EcoFlow’s store page.
Beside the AC inlet: a ground screw and the AC charging-speed switch. The DC output, the solar inputs and the AC inlet sit behind covers that are shown open.
Photo: EcoFlow · Product image, EcoFlow US store · numbers and labels are ours. Port names from EcoFlow’s manual; ratings from EcoFlow’s US spec table and manual; cover printing read from EcoFlow’s store picture.
Strengths & trade-offs
EcoFlow DELTA 3000 Gen4
Strengths
- +Costs $2,500 less
- +Lighter by 124.5 lb
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Weaker inverter (-3,600W) limits appliance compatibility.
- –Sealed capacity — the DELTA Pro Ultra can add batteries to grow past 3,072Wh; this one can't.
EcoFlow DELTA Pro Ultra
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$2,500) than the DELTA 3000 Gen4.
- –Significantly heavier (+124.5 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
- –Shorter-lived battery — rated for 3,500 charge cycles vs the DELTA 3000 Gen4's 6,000, so it wears out sooner.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
DELTA 3000 Gen4
The DELTA 4 (3000) covers the 2,100 Wh with 511 Wh left. The Pro Ultra has twice the battery and stays home at 181.8 lb.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
DELTA Pro Ultra
Both finish. The Pro Ultra ends with 3,577 Wh, about two more nights. The DELTA 4 (3000) ends with 966 Wh, a little over half of another.
Battery budget usedlower = more headroom
LOAD Fridge 150W×8h · Router + Modem 20W×8h · LED Lights (4 bulbs) 40W×6h · Phone Charger 15W×3h
SCN-03 · 8 hours · needs 320Wh
CPAP Overnight
Sleep therapy without interruption — the #1 medical use case
Either unit
Both cover a CPAP night several times over, since it uses 12% of the DELTA 4 (3000). Noise can't split them either: EcoFlow's DELTA 4 figure is a ceiling under heavy load, and neither published number describes a CPAP's small draw. Pick on everything else.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
DELTA Pro Ultra
The DELTA Pro Ultra clears the workday at 17% used, banking 4,312Wh — late work, extra calls, or a second laptop charge without arithmetic. The DELTA 3000 Gen4 at 35% also finishes, with 1,701Wh of slack for the unplanned.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
DELTA 3000 Gen4
The DELTA Pro Ultra at 181.8 lbs is not a take-along — it rolls off a truck bed if it travels at all, so this scenario belongs to the DELTA 3000 Gen4 by default — and it earns it, covering the 670Wh with 1,941Wh to spare. Capacity was never the DELTA Pro Ultra's problem here; getting to a tailgate was.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
DELTA Pro Ultra
The DELTA 4 (3000) runs 2,074 Wh short and has no battery port to close the gap. The Pro Ultra covers the 4,685 Wh with 537 Wh left, if the van can carry it.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: DELTA Pro Ultra runs 25.5h vs 12.7h.
$4,199 list · direct from EcoFlow
Planning for more than this? Describe your whole setup and get it sized →
Modeled from the spec record — same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.¹
Essentials
The basics you need runningscale 0–348.2hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–69.6hHigh-Draw Appliances
These reveal the real limitsscale 0–5.2h¹ Runtime = (capacity × 0.85) ÷ appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads — see methodology.
Conclusion
November 4, 2026
Verdict: the EcoFlow DELTA 3000 Gen4
For a house whose outages end by morning, I'd take the DELTA 4 (3000). It finishes the eight-hour blackout with 966 Wh left, runs 3,600 W from ordinary outlets, and costs less per watt-hour of battery than the Pro Ultra, at $1,699 against $4,199. The catch is that it never grows past 3,072 Wh, because it has no battery portA6. The Pro Ultra is the buy if anything in the house runs on 240 V, if your outages last days (it ends the same night with 3,577 Wh left), or if you need power before the DELTA 4 (3000) ships in early DecemberA10.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of November 4, 2026. The links below open EcoFlow's current price.
$1,699.00 · direct from EcoFlow
or check the DELTA Pro Ultra price$4,199.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated November 4, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): UPS, RV Living, Solar Generator, Tailgating, Apartment Balcony.
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, DELTA 3000 Gen4 rates 4.8/5 (86th percentile of 29 Large-class units), and DELTA Pro Ultra rates 4.9/5 (95th percentile of 22 Home Backup-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
More Than Three Times the Weight
The Pro Ultra's 181.8 lb comes split across its boxes and goes where it will stay. The DELTA 4 (3000) is 57.3 lb, one person and two handles into a trunk.
Sealed at 3,072 Wh
The DELTA 4 (3000) has no battery port, so 3,072 Wh is the ceiling for as long as you own it. Outgrow it and the answer is a second unit. The Pro Ultra starts at twice that and takes extra batteries.
Surge Power: Ratio and Ceiling Disagree
The DELTA 3000 Gen4 holds the higher surge-to-continuous ratio (2× vs 1.5×), but the DELTA Pro Ultra holds the higher absolute surge ceiling — 10,800W against 7,200W. These measure different things. The ratio says how much headroom an inverter keeps above its own rating; the ceiling says how big a startup spike it can actually swallow. A motor draws a number of watts at switch-on, not a multiple of someone else's rating, so on raw starting ability the DELTA Pro Ultra is the stronger unit here — while the DELTA 3000 Gen4 is the one running further below its own limit at steady state.
UPS Switchover: 0ms-rated vs ≤10ms
Both list a UPS mode, at different rated speeds. The DELTA Pro Ultra is rated 0ms — a no-break design on paper, which is the maker's classification rather than a stopwatch result. The DELTA 3000 Gen4 is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. If a computer with unsaved work is the thing being protected, the stated class is worth the attention; nothing here is a lab result.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. The DELTA 3000 Gen4's figure is a maximum rather than a guarantee — it depends on registering the unit in the EcoFlow app, which adds two years to a three-year standard term. Worth saying because the per-dollar framing can suggest otherwise: the DELTA 3000 Gen4 works out at 2.9 years of cover per $1,000 spent against the DELTA Pro Ultra's 1.2, but that spread is the price gap, not the terms.
Battery Lifespan in Real Years
The DELTA 3000 Gen4 is rated for 6,000 cycles vs 3,500. In real life: at daily use, that's 16.4 vs 9.6 years. At weekend use (twice a week), it's 58 vs 34 years. One caution reading years across different sizes: a cycle is 3,072Wh on the DELTA 3000 Gen4 and 6,144Wh on the DELTA Pro Ultra, so count lifetime energy — roughly 18,432 kWh against 21,504 kWh over the rated life. After hitting the cycle limit, the battery doesn't die — it drops to ~80% of original capacity, which is still very usable.
Full record above — the Test Desk pick is the DELTA 3000 Gen4.
Check DELTA 3000 Gen4 price →or check the DELTA Pro Ultra priceOwnership Analysis
What happens after you buy — true cost of ownership, brand trust, and growth potential.
Lifetime value
Service lifeyears at one full cycle per day
Lifetime energy delivered
Cost per delivered kWh
│ warranty ends · Reaching the cycle rating means ~80% capacity remains — degraded, not dead.
Analyst note
The DELTA 3000 Gen4 wins on both sticker price and long-term value. At $0.09/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner. One caution on the lifespan row: the DELTA 3000 Gen4 takes longer to reach its cycle rating, but a cycle moves a different amount of energy on each unit — the DELTA Pro Ultra still delivers more over its shorter horizon (21,504 vs 18,432 kWh). Years measure wear, not usefulness.
Delivers each lifetime kWh for $0.11 less — check the DELTA 3000 Gen4 price →
Growth path
DELTA 3000 Gen4
FIXED CAPACITYFixed at 3,072Wh — a sealed, complete system rather than a starting point. There's no expansion port, so that figure is the ceiling: check it against your longest unplugged stretch before you buy.
Accepts up to 1,000W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
DELTA Pro Ultra
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 6,144Wh.
Accepts up to 5,600W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
The DELTA 3000 Gen4 is sealed at 3,072Wh, which is fine if that covers you. The DELTA Pro Ultra starts at 6,144Wh and can grow beyond it with EcoFlow expansion batteries — real headroom the DELTA 3000 Gen4 doesn't have if your needs climb toward partial-home backup.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3000 Gen4
Nobody owns a DELTA 4 (3000) yet. It went on sale in the US on November 4 and EcoFlow says it ships in early DecemberA10, so everything here comes from EcoFlow's US store page and spec tableA1A2A3.
I'd want to put its twist-lock outlet on a transfer switch. EcoFlow rates that outlet at 30 AA3. If I had one here, I'd wire it to the fridge, furnace and router circuits, pull the main breaker at dinner, and see what the screen says at sunrise. EcoFlow claims it runs a fridge for up to 58 hoursA12, and that's the claim I'd most want to check.
“Capacity 3,072 Wh, LFP (LiFePO4) cells. EcoFlow sells it as the DELTA 3000 Gen4; buyers and the press call the pair the DELTA 4.”
Sources
us.ecoflow.co · jp.ecoflow.co
EcoFlow DELTA Pro Ultra
The field record we hold for the Pro Ultra is one retailer's reviews. Home Depot owners call it quick to set up, strong on solar and easy to watch in the app, and say it runs a 3-ton central ACB4. The rest is EcoFlow talkingB1B3.
EcoFlow's loudest claims are speed and silence. It says 8,800 W of charging tops up two batteries in about two hours, and that the unit runs silent under 2,000 WB3. Those are the maker's figures, not ours.
“6,144Wh per battery with 7,200W continuous output (10.8kW surge), expandable to 90kWh across a system for a household — over 30 days of essential backup.”
Sources
ecoflow.com · homedepot.com · autoboosting.com · ecogadgethub.com
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Launch-day ledger: every entry is EcoFlow's own US store and documentation, or our labelled arithmetic. No owner or reviewer evidence exists yet. [DELTA 3000 Gen4 · 12 entries]
- Whole-home scale (to 90kWh), 7,200W output, online UPS, silent operation under load, and industry-fast charging are the standout features. [DELTA Pro Ultra · 2 entries]
- A1
“Capacity 3,072 Wh, LFP (LiFePO4) cells. EcoFlow sells it as the DELTA 3000 Gen4; buyers and the press call the pair the DELTA 4.”
EcoFlow US store, us.ecoflow.com/products/delta-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A2
“US unit: 120 V AC, 60 Hz; rated 3,600 W continuous with a 7,200 W surge. It supports X-Boost (EcoFlow refers to the manual for the US X-Boost figure); X-Boost is unavailable while the unit charges from the wall or runs in bypass.”
EcoFlow US store, us.ecoflow.com/products/delta-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A3
“AC outlets: 5 total, four rated 20 A max and one rated 30 A max (on EcoFlow's product images, four T-slot outlets and a three-slot twist-lock). USB-A: one port, 36 W max. USB-C: one at 140 W max and two at 65 W max; the two 65 W ports share circuitry with the USB-A, limited to 16 W total when used together. No 12 V car socket.”
EcoFlow US store, us.ecoflow.com/products/delta-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A5
“Solar: one input, 11–60 V DC at up to 20 A, 1,000 W (XT60i; an XT60i-to-LP60 cable is in the box). EcoFlow lists six charging methods; its 800 W Alternator Charger is limited to 500 W through the Solar/DC port.”
EcoFlow US store, us.ecoflow.com/products/delta-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A6
“No extra-battery port. EcoFlow lists expansion only for the DELTA 3800 Gen4 (two extra batteries through its expansion adapter); the 3000 is sealed at 3,072 Wh.”
EcoFlow US store, us.ecoflow.com/products/delta-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A7
“Weight 57.3 lb (26 kg); 16.77 × 11.36 × 12.09 in without handles, 18.76 in long with them. A handle at each end; EcoFlow sells a folding transport cart separately ($109 at launch, listed at $199). EcoFlow calls it the smallest and lightest portable power station in its class (3 kWh and 3,600 W).”
EcoFlow US store, us.ecoflow.com/products/delta-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A8
“Switches to backup within 10 ms when the grid drops; EcoFlow's FAQ says it does not support HID communication. Noise by EcoFlow's figures: 40 dB or less at up to 1,800 W, 50 dB or less at the full 3,600 W. IP20.”
EcoFlow US store, us.ecoflow.com/products/delta-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A10
“On sale at us.ecoflow.com from November 4, 2026 at $1,699; EcoFlow says it ships in early December. Kit with two 160 W solar panels $2,299. EcoFlow also sells it in Japan, where it went on sale October 30 at ¥179,900.”
EcoFlow US store, us.ecoflow.com/products/delta-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- A12
“Powers a refrigerator for up to 58 hours, which EcoFlow says is 17 hours (41.5%) longer than the industry average for 3 kWh portable power stations. Both figures are EcoFlow's own claims, not our measurement.”
EcoFlow US store, us.ecoflow.com/products/delta-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [positive]
- B1
“6,144Wh per battery with 7,200W continuous output (10.8kW surge), expandable to 90kWh across a system for a household — over 30 days of essential backup.”
ecoflow.com / homedepot.com — DELTA Pro Ultra · 2026 · [positive]
- B3
“Industry-fast 8,800W charging tops up two batteries in about 2 hours; an online UPS protects sensitive electronics round the clock, and it runs at 0 dB (silent) for draws under 2,000W.”
ecoflow.com / ecogadgethub.com — DELTA Pro Ultra review · 2026 · [positive]
- B4
“Owners call it a powerful, easy-to-use whole-home backup with quick setup, strong solar input, and good app monitoring; its 7,200W inverter can power a 3-ton central AC.”
homedepot.com owner reviews — DELTA Pro Ultra · 2026 · [positive]
Research compiled November 4, 2026.
Who Should Buy Which
Buy the DELTA 3000 Gen4 if you…
- →Your outages end by morning. It finishes an eight-hour blackout with 966 Wh left.
- →It has to travel too. 57.3 lb with a handle at each endA7, against 181.8 lb you install once.
- →Everything you'd back up plugs into an ordinary outlet. A fridge, a sump pump, the router and the lights fit inside 3,600 W.
- →You can live with a fixed battery. It costs less per watt-hour than the Pro Ultra, and 3,072 Wh is all it will ever holdA6.
Buy the DELTA Pro Ultra if you…
- →Something in the house runs on 240 V, like central air, a deep well pump or an electric dryer.
- →Your outages run for days. It ends an eight-hour blackout with 3,577 Wh, two more nights' worth.
- →A computer on it can't blink. EcoFlow classes its switchover as no-break.
- →You can't wait for December. The Pro Ultra already has ownersB4, and the DELTA 4 (3000) ships in early DecemberA10.
If neither fits
If the job is a CPAP and a phone through the night, both are far more than you need. A CPAP night uses 12% of what the DELTA 4 (3000) delivers. A station around 1,000 Wh does it for much less.
The Bottom Line
If your outages last a night and the box might ever leave the house, I'd take the DELTA 4 (3000). It's half the battery and half the inverter for less per watt-hour, at under a third of the weight, and it finishes the blackout night with room to spare.
If the house needs 240 V, or the power stays off for days, buy the Pro Ultra. The DELTA 4 (3000) can't grow into either job, and the Pro Ultra starts there.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Can the DELTA 4 (3000) add extra batteries?
No. It has no battery port, so 3,072 Wh is the most it will ever hold. EcoFlow offers expansion on the bigger DELTA 4 instead, and the DELTA Pro Ultra starts at 6,144 Wh and takes extra batteries too.
Can the DELTA 4 (3000) run central air or a well pump?
Not one that runs on 240 V, because it has no 240 V outlet. It runs 3,600 W at 120 V from ordinary outlets. The DELTA Pro Ultra has a 240 V outlet and 7,200 W of output.
How much is the DELTA 4 (3000) in the US?
EcoFlow lists it at $1,699 on its US store, and it ships in early December. The DELTA Pro Ultra sells for $4,199. Per watt-hour of battery, the DELTA 4 (3000) is the cheaper of the two.
Is the DELTA 4 (3000) a real UPS for a computer?
Partly. It switches to battery in no worse than 10 ms, which desktop PCs and routers should ride through on paper, but it has no HID connection to tell a computer the power is out. EcoFlow classes the DELTA Pro Ultra's switchover as no-break.
Which one recharges faster from solar?
The DELTA Pro Ultra, by a wide margin. It accepts up to 5,600 W of solar against 1,000 W on the DELTA 4 (3000)'s single input. That input takes panels from 11 to 60 V.
Where to buy
EcoFlow DELTA 3000 Gen4Pick
$1,699.00
$1,699.00 · direct from EcoFlow
EcoFlow DELTA Pro Ultra
$4,199.00
$4,199.00 · direct from EcoFlow
Last checked 31 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.