Head-to-head test
EcoFlow DELTA 3 Ultra vs EcoFlow DELTA 3000 Gen4Same Battery, Same Inverter, 14.8 lb Lighter. Worth Paying More?
EcoFlow DELTA 3 Ultra vs EcoFlow DELTA 3000 Gen4: the same 3,072Wh battery and 3,600W inverter, and the newer one is 14.8 lb lighter and rated for 6,000 cycles against 4,000. Buy the DELTA 3 Ultra for home backup and its car socket. Pick the newer one only if you'll carry it often or drain it most days.
Black Friday · 22 days out
Price to beat:DELTA 3 Ultra $1,199
The lowest we have recorded. A Black Friday price above it is a sale this unit has already had.
Full profiles: EcoFlow DELTA 3 Ultra → · EcoFlow DELTA 3000 Gen4 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
Gunner’s take
Whole-Home Backup Tester
EcoFlow put one battery and one inverter in two different boxes.
The DELTA 3 Ultra and the DELTA 4 (3000) both hold 3,072 Wh, and both run 3,600 W with a 7,200 W surgeB2. The DELTA 4 (3000) weighs 57.3 lb against 72.1 lb. That's 14.8 lb less to lift for exactly the same job.
The newer box costs more, and you'll wait for it.
EcoFlow lists the DELTA 4 (3000) at $1,699 and says it ships in early DecemberB10. The Ultra sells for $1,399 today. The $300 difference buys three things: less weight, a 6,000-cycle rating against 4,000, and 1,000 W of solar against 800 W.
For a house, I'd buy the Ultra.
A home backup box comes out a few times a year, sits by the fridge and never gets near its 4,000th cycle. The Ultra also keeps a 12 V car socket and an RV-shaped 30 A outlet, where the DELTA 4 (3000) has no car socket and a twist-lockB3. If you carry it every weekend or drain it every day, the math turns, and the rest of this page shows where.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
weight
57.3 lb is a lift one adult manages from a car to a porch. 72.1 lb is where I start looking for a second pair of hands or a ramp. For a box that lives beside the fridge, you feel that difference once, on delivery day. For a box that goes to the campsite, you feel it every trip.
DELTA 3 Ultra: 3,072 Wh at 72.1 lbDELTA 4 (3000): 3,072 Wh at 57.3 lb, with a handle at each endB7EcoFlow sells a folding cart for the DELTA 4 (3000) separatelyB7
Why it mattersIf it travels, the DELTA 4 (3000) earns part of its premium. If it parks, it earns none.
rated cycles
That only pays if you spend the cycles. Eleven years of daily cycling is an off-grid cabin or a van that drains it every night. A house that loses power a handful of times a year will never get near either rating, so the higher one is a number you paid for and never use.
DELTA 3 Ultra: rated for 4,000 cycles, 12,288 kWh over its lifeDELTA 4 (3000): rated for 6,000 cycles, 18,432 kWh over its lifeAt one full cycle a day: 11 years against 16.4 years
Why it mattersIf you'll cycle it daily, the DELTA 4 (3000)'s rating is worth buying. If it's storm insurance, it isn't.
A 12 V fridge plugs straight into the Ultra, and a camper's 30 A shore cord fits its outlet. The twist-lock takes a different plug. On the DELTA 4 (3000), the full 1,800 W charge draws all 15 A a standard household circuit is rated forB4, so on a kitchen circuit shared with a toaster I'd turn it down in the app before something trips.
DELTA 3 Ultra: one 12 V car socket and a 30 A RV outletDELTA 4 (3000): no car socket, and its 30 A outlet is a three-slot twist-lockB3DELTA 4 (3000): up to 1,800 W from the wall, 15 A at 120 V by EcoFlow's rating and our arithmeticB4
Why it mattersFor a van or an RV, the Ultra. For fast top-ups from a dedicated circuit, the DELTA 4 (3000).
The specific dimensions that decide these two units — everything else is a tie.
Portability & Form Factor
Selected because: One battery, two weights: 72.1 lb against 57.3 lb for the same 3,072Wh.
weight
The Ultra is the one you plan a route for. At 72.1 lb, getting it up porch steps is a job for two people or a ramp. The DELTA 4 (3000) is 57.3 lb with a handle at each end, and EcoFlow sells a folding cart for it separatelyB7.
I'd lift the lighter one into a truck bed alone. I wire houses for a living, so I carry awkward things most days. The gap between these two is the difference between one trip and asking for help.
Lifetime Value
Selected because: Rated for 4,000 cycles against 6,000, which only matters if you spend them.
cost / lifetime kWh
This is where the DELTA 4 (3000) makes its best case. It's rated for 6,000 cycles against 4,000, a cycle being one full drain and refill. Spread over that life it costs $0.09 per kWh against the Ultra's $0.11, so the pricier box is the cheaper one to own if you work it hard.
Storm insurance never cashes that in. At one cycle a day, the Ultra's rating lasts 11 years. A box that comes out for a few outages a year won't get anywhere near it, and then the sticker is the number that counts.
What the Specs Don't Tell You
Selected because: The Ultra keeps a 12 V car socket and an RV outlet; both switch over within 10 ms.
rated cycles
The Ultra keeps the sockets a vehicle already uses. It has a 12 V car socket for a car fridge and a 30 A RV outlet for a camper's shore cord. The DELTA 4 (3000) has neither shape: no car socket, and a three-slot twist-lock for its 30 A outletB3.
Both switch over fast enough for a router. Each is rated to take over within 10 ms when the grid drops. A reviewer of the Ultra Plus, which shares the Ultra's inverter, pulled the wall plug mid-task and saw no dipsA6. EcoFlow's FAQ says the DELTA 4 (3000) doesn't support HID, the USB link a computer uses to shut itself down on batteryB8.
Your Life, Your Pick
Selected because: Identical batteries land every scenario identically, and Van Life Daily is short on both.
Same battery, same results. The eight-hour blackout leaves both with 966 Wh. Camping, a CPAP night, a remote workday and a tailgate all fit with room left on either.
Van Life Daily beats both, and neither can grow to meet it. It asks for 4,685 Wh and each comes up 2,074 Wh short. Neither takes an extra batteryB6, so that day needs a different kind of station.
Every port, labelled
What plugs in where, and how much it takes
EcoFlow DELTA 3 Ultra
Front panel
- 1USB-C · 140 WOutUp to 140 W, printed on the panel.
- 22× USB-C · 45 WOutUp to 45 W each, printed on the panel.
- 3USB-A · 18 WOutUp to 18 W, printed on the panel.
- 44× 20 A outletsOutFour T-slot 120 V outlets, sharing 3,600 W continuous and a 7,200 W surge.
- 530 A RV outletOutAn RV outlet marked 30A MAX. A camper’s shore-power cord plugs straight in.
Photo: EcoFlow · Product image, EcoFlow US store · numbers and labels are ours. Port ratings printed on EcoFlow’s panel; output totals from our catalogue.
Rear panel
- 1AC inInThe AC charging inlet.
- 2Charge-speed switchInSwitches the AC charging speed.
- 3Solar/DC in · 800 WInUp to 800 W of solar.
- 412 V car socketOutA 12 V car socket with its own on/off button, for a car fridge.
Photo: EcoFlow · Product image, EcoFlow US store · numbers and labels are ours. Port names printed on EcoFlow’s panel; the solar figure from our catalogue.
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.
Strengths & trade-offs
EcoFlow DELTA 3 Ultra
Strengths
- +Costs $300 less
Trade-offs
- –Significantly heavier (+14.8 lbs), making it harder to move.
- –Shorter-lived battery — rated for 4,000 charge cycles vs the DELTA 3000 Gen4's 6,000, so it wears out sooner.
EcoFlow DELTA 3000 Gen4
Strengths
- +Lighter by 14.8 lb
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –No major technical downsides compared to rival.
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
Either unit
Both handle two nights comfortably, each finishing at 80% used. With this little difference, pick based on weight and portability instead. The lighter unit wins for car camping.
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
Either unit
Identical batteries, identical night. Both finish with 966 Wh left, and both switch over within 10 ms.
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 40 W night many times over. Noise can't split them: EcoFlow's figure for the DELTA 4 (3000) is a ceiling under heavier load, and neither figure was taken at a CPAP's draw. Decide on price or weight.
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
Either unit
Both power your workstation all day without strain, and their USB-C output is a wash — pick on weight, ports, or price.
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
Either unit
Both cover it with 1,941 Wh to spare. The lighter DELTA 4 (3000) is the nicer one to haul across the lot, and that's the only difference.
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
Neither unit
Both come up 2,074 Wh short of 4,685 Wh, and neither takes an extra battery. This day needs a bigger station.
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
Dead heat — both run this 205W load for roughly 12.7h. Pick on price, weight, or ports.
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 0–174.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–34.8hHigh-Draw Appliances
These reveal the real limitsscale 0–2.6h¹ 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 DELTA 3 Ultra
I'd buy the DELTA 3 Ultra, unless you'll carry it often or drain it daily. It holds the same 3,072 Wh as the DELTA 4 (3000) and runs the same 3,600 W with the same 7,200 W surgeB2, for $300 less, and it's on sale now with a 12 V car socket the newer box doesn't haveB3. The DELTA 4 (3000) answers with 57.3 lb against 72.1 lb, 6,000 cycles against 4,000 and 1,000 W of solar against 800 W, and it ships in early DecemberB10. If a sale closes most of the gap between them, the lighter box becomes the easy pick.
Today the DELTA 3 Ultra is $1,299, $100 under its typical $1,399. The verdict weighs typical prices, not today's. Prices checked 32 days ago.
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.
$1,299.00 · direct from EcoFlow
down from $1,399 · 7% below usual
Last checked 32 days ago. Prices move — check before you buy.
or check the DELTA 3000 Gen4 price$1,699.00 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): 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 3 Ultra rates 4.6/5 (79th percentile of 29 Large-class units), and DELTA 3000 Gen4 rates 4.8/5 (86th percentile of 29 Large-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.
One Battery, Two Weights
The DELTA 3 Ultra weighs 72.1 lb and the DELTA 4 (3000) 57.3 lb, for exactly the same 3,072 Wh. Neither is a one-hand carry. The lighter one is the box one person lifts into a car.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. Both figures are maximums rather than guarantees — they depend on registering the unit in the EcoFlow app, which adds two years to a three-year standard term.
More Cycles Than a House Will Use
The DELTA 4 (3000) is rated for 6,000 cycles against 4,000. At one cycle a day that's 16.4 years against 11. A backup box that comes out a few times a year won't reach either rating.
Full record above — the Test Desk pick is the DELTA 3 Ultra.
Check DELTA 3 Ultra price →or check the DELTA 3000 Gen4 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 3 Ultra is cheaper to buy, but the DELTA 3000 Gen4 is cheaper to own. At $0.09/kWh over its lifetime vs $0.11/kWh, the DELTA 3000 Gen4's higher cycle life and capacity make each dollar go further over the years.
Growth path
DELTA 3 Ultra
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 800W of solar. Suitable for a 1-2 panel setup.
Adequate ports for most setups, but heavy users may want a power strip.
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.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Neither expands, and that's no knock on either — each is a complete unit at a fixed size. They hold the same 3,072Wh, so capacity can't break the tie: decide on price, weight, and the rest, and know that whichever you pick is the ceiling.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Ultra
Most of the hands-on coverage is of the Ultra Plus. Our research notes it shares the Ultra's battery, inverter and chassis but not its solar input, expansion or weightA0, so I take these as character, not specs. Reviewers found it quiet even at full outputA1A2 and built to take knocksA9.
One reviewer ran a full workday off it. Laptop, desktop workstation and monitors for eight hours, and it finished with 40% leftA8. Another review found the unit cuts its 30 A port first when overloadedA3, which is worth knowing if that's where your camper plugs in.
“Even when you're pushing it hard, the DELTA 3 Ultra Plus runs much quieter than older EcoFlow models, like the DELTA 2 Max.”
Sources
thesolarlab.com · postperspective.com · appleinsider.com · digitaltrends.com · popsci.com
EcoFlow DELTA 3000 Gen4
Nobody owns one yet. The DELTA 4 (3000) went on sale in the US on November 4 and ships in early DecemberB10, so everything here comes from EcoFlow's US store page and our arithmetic on itB1B4.
I'd want to test the wall charging on a real kitchen circuit. EcoFlow rates it at 1,800 W, which takes the whole 15 A a standard circuit is built forB4. I'd plug it in beside a running fridge and see whether the breaker or the app gives first.
“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
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Reviewers consistently praise the quiet fan operation of the Ultra-tier unit compared to older EcoFlow models, though this is described in professional test conditions rather than long-term ownership. [DELTA 3 Ultra · 2 entries]
- UPS/switchover performance is repeatedly called seamless with no observed dips or shutdowns during power interruption tests. [DELTA 3 Ultra · 3 entries]
- The unit's substantial 74 lb weight is flagged across multiple reviews as a portability drawback, mitigated somewhat by wheels and handle design. [DELTA 3 Ultra · 2 entries]
- Build quality/durability (casing, cable, port covers) is repeatedly highlighted as premium and well-engineered. [DELTA 3 Ultra · 2 entries]
- 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]
- A1
“Even when you're pushing it hard, the DELTA 3 Ultra Plus runs much quieter than older EcoFlow models, like the DELTA 2 Max.”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · 2025-09/10 (approx) · [positive]
- A2
“Even when you're pushing the inverter to its maximum output, the fans never become annoying or distracting.”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · 2025-09/10 (approx) · [positive]
- A3
“One weird thing we noticed was the fact that the unit always seems to shut down the 30A port first when you overload the unit.”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · 2025-09/10 (approx) · [mixed]
- A6
“I didn't experience any shut-offs or dips when I unplugged the EcoFlow from the wall.”
postperspective.com — Review: EcoFlow Delta 3 Ultra Plus Portable Power Station · 2026-04 · [positive]
- A8
“I was able to work remotely for an eight-hour day with 40% power left, which included running my laptop, desktop workstation and monitors.”
postperspective.com — Review: EcoFlow Delta 3 Ultra Plus Portable Power Station · 2026-04 · [positive]
- A9
“It does not feel cheap or fragile. Everything from the outer shell case to the plastic buttons and the AC cable feels substantial and durable enough to withstand day-to-day wear and tear.”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11-16 · [positive]
- B1
“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]
- B2
“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]
- B3
“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]
- B4
“AC input 100–120 V, 15 A, 50/60 Hz; X-Stream charging up to 1,800 W from a US wall outlet. Our arithmetic: 1,800 W at 120 V is 15 A, the full rating of an ordinary 15 A circuit, so on a shared circuit you would set the charge rate lower in the EcoFlow app.”
EcoFlow US store, us.ecoflow.com/products/delta-3000-gen4 (spec table, features and FAQ, read 2026-11-04) · 2026-11-04 · [mixed]
- B6
“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]
- B7
“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]
- B8
“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]
- B10
“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]
Research compiled November 4, 2026.
Who Should Buy Which
Buy the DELTA 3 Ultra if you…
- →It's for the house. The same 3,072 Wh and 3,600 W for $300 less.
- →You need it before December. It's on sale now at $1,399.
- →It rides in a van or an RV. A 12 V car socket and a 30 A RV outlet.
- →You'll use it a few times a year. Its 4,000 cycles last 11 years even at one a day.
Buy the DELTA 3000 Gen4 if you…
- →You'll carry it often. 57.3 lb against 72.1 lb.
- →You drain it every day, off-grid or at a cabin. Rated for 6,000 cycles against 4,000.
- →You charge from a dedicated circuit and want up to 1,800 W from the wallB4.
- →You run more panels. 1,000 W of solar against 800 W.
If neither fits
If your day looks like Van Life Daily, skip both. Each covers about 56% of its 4,685 Wh, and neither has a battery portB6. Look at a station that takes extra batteries.
The Bottom Line
For a house, I'd buy the DELTA 3 Ultra. The same battery and the same inverter for $300 less, and you can have it before the next storm.
Pay for the DELTA 4 (3000) if you'll carry it or cycle it hard. It's 14.8 lb lighter and rated to outlast the Ultra, and both of those are worth money only if you use them.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the DELTA 4 (3000) worth the extra money over the DELTA 3 Ultra?
For home backup, no. Both hold 3,072 Wh and run 3,600 W with a 7,200 W surge. The extra $300 buys a box that weighs 57.3 lb against 72.1 lb, a 6,000-cycle rating against 4,000, and 1,000 W of solar against 800 W. That's worth paying for if you carry it often or drain it daily.
How much does the DELTA 4 (3000) cost?
EcoFlow lists it at $1,699 in the US and says it ships in early December. The DELTA 3 Ultra sells for $1,399 and is on sale now.
Does the DELTA 4 (3000) have more power than the DELTA 3 Ultra?
No. Both run 3,600 W continuously and surge to 7,200 W. The DELTA 4 (3000) charges at up to 1,800 W from the wall.
Which one has a car socket or an RV outlet?
The DELTA 3 Ultra has both: a 12 V car socket and a 30 A RV outlet. The DELTA 4 (3000) has no car socket, and its 30 A outlet is a three-slot twist-lock.
Can either one add an extra battery?
No. Both are fixed at 3,072 Wh, and the DELTA 4 (3000) has no battery port. If you want to add batteries later, look at a station built for it.
Where to buy
EcoFlow DELTA 3 UltraPick
$1,299.00
$1,299.00 · direct from EcoFlow
down from $1,399 · 7% below usual
Last checked 32 days ago. Prices move — check before you buy.
EcoFlow DELTA 3000 Gen4
$1,699.00
$1,699.00 · direct from EcoFlow
Prices may vary by retailer and are subject to change.