Head-to-head test
EcoFlow DELTA 3 Ultra Plus vs EcoFlow DELTA 3000 Gen417 lb Lighter, Same Battery. What Did EcoFlow Leave Out?
EcoFlow DELTA 3 Ultra Plus vs EcoFlow DELTA 3000 Gen4: the same 3,072 Wh battery and the same 3,600 W inverter. The Ultra Plus adds an expansion port, 600 W more solar input, RV and car outlets; the DELTA 4 (3000) is 17 lb lighter and rated for 6,000 cycles against 4,000. Buy the Ultra Plus unless you'll carry it often and never need more battery.
Black Friday · 23 days out
Price to beat:DELTA 3 Ultra Plus $1,499
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 Plus → · 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
Same battery, same inverter, 17 lb apart.
The DELTA 3 Ultra Plus and the DELTA 4 (3000) both hold 3,072 Wh and run 3,600 W continuously with a 7,200 W surgeB1B2. The Ultra Plus weighs 74.3 lb and the DELTA 4 weighs 57.3 lbB7. So the real question is what the heavier box gives you back.
It gives you the parts that let a battery stand on its own.
The Ultra Plus takes EcoFlow's extra batteries, and the DELTA 4 has no port for oneB6. It takes 1,600 W of solar against 1,000 W through the DELTA 4's single inputB5. It also has an RV-style 30 A outlet and a 12 V car socket. The DELTA 4's 30 A outlet is a twist-lock, and it has no car socketB3.
Price barely splits them.
The Ultra Plus sells for $1,599 and the DELTA 4 (3000) is listed at $1,699, a gap of $100, and EcoFlow says the DELTA 4 ships in early DecemberB10. What the new box brings is a lighter carry and a longer cycle rating: 6,000 cycles against 4,000.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
solar input
Through 1,000 W the DELTA 4 needs a little over three hours of perfect sun to fill from empty. Through 1,600 W the Ultra Plus needs under two. A December storm leaves you only a few strong hours a day, and the Ultra Plus is the one likely to finish refilling inside them.
Both hold 3,072 WhB1DELTA 3 Ultra Plus: 1,600 W of solar inputDELTA 4 (3000): one solar input, 11 to 60 V, up to 1,000 WB5
Why it mattersIf panels are how you'll refill during an outage, buy the Ultra Plus.
The Ultra Plus can close that 2,074 Wh gap with a battery added to the box you already own. The DELTA 4 can't close it at any price. Its answer to a bigger need is a second station, and that weighs a lot more than 17 lb.
DELTA 3 Ultra Plus: takes EcoFlow expansion batteriesDELTA 4 (3000): no extra-battery port, sealed at 3,072 WhB6Van Life Daily needs 4,685 Wh: both fall 2,074 Wh short
Why it mattersIf there's any chance you'll want more battery later, the Ultra Plus's extra weight is a fair price for the port.
rated cycles
A backup box that empties a few times a year will never see 4,000 cycles, let alone 6,000, and lifted once into a closet the 17 lb is a one-time cost. The DELTA 4 earns its keep in a cabin that cycles it every night, or with a camper who lifts it every weekend.
DELTA 4 (3000): rated for 6,000 cycles; DELTA 3 Ultra Plus: 4,000At one full cycle a day, that's 16.4 years against 11DELTA 4 (3000): 57.3 lb against 74.3 lb
Why it mattersIf that's your life, the DELTA 4 (3000) is the better box; if it's a closet and a storm, it isn't.
The specific dimensions that decide these two units — everything else is a tie.
Growth Path
Selected because: The same 3,072 Wh today, but only the Ultra Plus can add to it.
solar input
The port is most of what the Ultra Plus's extra weight carries. It takes EcoFlow's extra batteries. The DELTA 4 (3000) has no battery port at allB6, so 3,072 Wh is its ceiling for as long as you own it.
I'd skip the port only if I knew the job for good. A box that keeps a fridge and a router going through a one-night outage never needs one. A box that starts a home-backup plan should have somewhere to go. If you like the DELTA 4 and want room to grow, EcoFlow put the battery port on the bigger DELTA 4 insteadB6.
Portability & Form Factor
Selected because: 74.3 lb against 57.3 lb for the same battery and the same inverter.
weight
Seventeen pounds is the difference between one person and two. The DELTA 4 is 57.3 lb with a handle at each end, and EcoFlow sells a cart for it separatelyB7. One reviewer called the Ultra Plus's 74 pounds thunderousA9. That's about where I stop carrying things down basement stairs alone.
Weight only costs you when the box moves. Parked beside the fridge, you lift either one once. If it rides to a campsite every month, the DELTA 4 saves you 17 lb each way, every trip.
What the Specs Don't Tell You
Selected because: The DELTA 4 (3000) carries the longer cycle rating; the Ultra Plus carries the RV outlet and the car socket.
rated cycles
The DELTA 4's real spec win is its cycle rating. EcoFlow rates it for 6,000 cycles against the Ultra Plus's 4,000. Run flat every day, that's 16.4 years against 11. For a cabin on solar that's worth paying for. A unit that only comes out for storms will never reach either number.
The outlets favor the Ultra Plus if you camp in an RV. Its 30 A outlet is the RV kind, and it has a 12 V car socket. The DELTA 4's 30 A outlet is a twist-lock, and it has no car socketB3. One reviewer found the Ultra Plus shuts its 30 A outlet first when overloadedA3, which is worth knowing if your RV hangs off it.
Your Life, Your Pick
Selected because: Identical batteries give identical results: five scenarios on both, Van Life Daily on neither.
Same battery, same results, row for row. Both finish Weekend Camping at 80% used and the 8-hour blackout with 966 Wh left. Both switch to battery within 10 ms when the grid drops, so a router or a desktop rides through on either.
Van Life Daily asks for 4,685 Wh, and both come up 2,074 Wh short. Only the Ultra Plus can add a battery to close that. On the DELTA 4, the fix is a second station.
Every port, labelled
What plugs in where, and how much it takes
EcoFlow DELTA 3 Ultra Plus
Front panel
- 1USB-C · 140 WOutUp to 140 W (up to 28 V at 5 A), printed on the panel and in EcoFlow’s specs.
- 22× USB-C · 45 WOutTwo USB-C ports printed 45W. EcoFlow’s specs say 45 W per port and 45 W in total.
- 3USB-A · 18 WOutUp to 18 W, printed on the panel.
- 4AC 1 · 2× 20 AOutTwo T-slot 120 V outlets, 20 A each, printed AC 1 with their own AC 1 on/off button. All the AC outlets share 3,600 W continuous and a 7,200 W surge.
- 5AC 2 · 2× 20 AOutTwo more T-slot 120 V outlets, 20 A each, on the group printed AC 2, switched by the AC 2 button.
- 630 A RV outletOutAn RV outlet marked 30A MAX, joined to the AC 2 group on the panel. 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 and in the specs on EcoFlow’s US store page for the Plus.
Rear panel
- 1AC inInThe AC charging inlet: 100–120 V at 15 A, by EcoFlow’s specs.
- 2Charge-speed switchInSwitches AC charging between FAST and ADJUST, as printed beside it.
- 32× Solar in · 1,600 WInTwo XT60 inputs, each printed 11–60 V, 18 A max. EcoFlow puts the most solar the unit takes at 1,600 W.
- 4Battery portIn · OutTakes EcoFlow’s DELTA 3 Max Plus or DELTA Pro 3 Smart Extra Battery; EcoFlow puts the expanded range at 3 to 11 kWh.
- 5Anderson · 12 V 30 AOutA 12 V DC port rated 30 A (12.6 V, 378 W), shared with the car socket.
- 612 V car socket · 10 AOutA 12 V car socket rated 10 A (126 W), sharing power with the Anderson port. A button printed 12V ON/OFF sits beside it.
Photo: EcoFlow · Product image, EcoFlow US store · numbers and labels are ours. Port names and solar ratings printed on EcoFlow’s panel; the rest from the specs on EcoFlow’s US store page for the Plus.
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 Plus
Strengths
- +Costs $100 less
- +Faster solar charging
Trade-offs
- –Significantly heavier (+17 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 17 lb
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Sealed capacity — the DELTA 3 Ultra Plus can add batteries to grow past 3,072Wh; this one can't.
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
Same battery, same result: both finish the 2,100 Wh weekend at 80% used. The tiebreak is the carry, and the DELTA 4 (3000) is 17 lb lighter.
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
Both finish the night with 966 Wh left, and both switch over within 10 ms. A dead heat, so decide on the expansion port and the weight instead.
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
A CPAP is about 40W for eight hours, so both of these cover the night several times over — capacity isn't the question here. The only published difference is fan noise, and it can't settle this: the DELTA 3 Ultra Plus is rated 30dB and the DELTA 3000 Gen4 40dB, but the DELTA 3 Ultra Plus's is its maker's best case and the DELTA 3000 Gen4's is EcoFlow's maximum under heavy charge and discharge, so at a 40W draw the real gap can only be narrower than it looks, and may even run the other way. Neither settles which box is quieter at a bedside. Buy whichever is cheaper or easier to carry.
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 handle game day easily. Since capacity isn't the deciding factor, weight is: at 57.3 lbs the DELTA 3000 Gen4 is the one you'll be glad you brought. Fan noise under load is worth a listen too — it's audible in the lulls between songs.
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
Neither covers 4,685 Wh; both fall 2,074 Wh short. The Ultra Plus can add a battery to close the gap. The DELTA 4 (3000) has no port, so it can't.
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 Plus
I'd buy the DELTA 3 Ultra Plus. Both hold 3,072 Wh and run 3,600 W with a 7,200 W surgeB1B2, so every scenario we run comes out identical. For about the same money, $1,599 against $1,699, the Ultra Plus adds an expansion port, 1,600 W of solar input against 1,000 WB5, an RV outlet and a 12 V car socket. The DELTA 4 (3000) answers with 17 lb less weight and a 6,000-cycle rating against 4,000. If you'll carry it every month and cycle it every day, those two are worth more than the ports, and the call flips.
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.
$1,599.00 · direct from EcoFlow
Last checked 31 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 Plus rates 4.9/5 (93rd 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.
17 lb Heavier, and What It Carries
The DELTA 3 Ultra Plus weighs 74.3 lb and the DELTA 4 (3000) 57.3 lb, for the same 3,072 Wh and the same 3,600 W. What the Ultra Plus has in that extra weight: an expansion port, 600 W more solar input, an RV outlet and a car socket.
Same Battery Today, Different Ceiling
Both hold 3,072 Wh. The DELTA 4 (3000) has no expansion port, so that's all it will ever hold. The DELTA 3 Ultra Plus takes EcoFlow's extra batteries.
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.
Longer Life, If You Use It
The DELTA 4 (3000) is rated for 6,000 cycles and the DELTA 3 Ultra Plus for 4,000. At one cycle a day that's 16.4 years against 11. Used a few times a year for outages, neither gets close.
Full record above — the Test Desk pick is the DELTA 3 Ultra Plus.
Check DELTA 3 Ultra Plus 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 Plus is cheaper to buy, but the DELTA 3000 Gen4 is cheaper to own. At $0.09/kWh over its lifetime vs $0.13/kWh, the DELTA 3000 Gen4's higher cycle life and capacity make each dollar go further over the years.
Growth path
DELTA 3 Ultra Plus
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,072Wh.
Accepts up to 1,600W 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.
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
The DELTA 3000 Gen4 is sealed at 3,072Wh, which is fine if that covers you. The DELTA 3 Ultra Plus starts at 3,072Wh 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 3 Ultra Plus
What exists comes from reviewers, not long-term owners. Our research found no owner threads, only review sites that tested it for days or weeksA0. They agree it runs quiet: quieter than older DELTA models when pushedA1, and close to EcoFlow's DELTA Pro UltraA2A13.
The rest is mostly good news. One reviewer worked an eight-hour day off it and finished with 40% leftA5. Another saw no dip when pulling the wall plugA6, and the build feels substantial rather than fragileA8. The screen is hard to read in direct sunA7, and the weight draws the obvious complaintA9.
“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 · storagereview.com
EcoFlow DELTA 3000 Gen4
Nobody owns a DELTA 4 (3000) yet. It went on sale in the US on November 4 and ships in early DecemberB10, so everything here is EcoFlow's US store page and our own arithmeticB0B4.
I'd want to see it charge on a real garage circuit. At its full 1,800 W it pulls 15 A at 120 V, the entire rating of an ordinary 15 A circuitB4. If I had one, I'd plug it in on the same circuit as a running fridge to see whether the breaker holds, then turn the rate down in the app and time a full charge.
“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
- Professional reviewers consistently describe the fan noise as very quiet even under heavy load, comparable to EcoFlow's premium DELTA Pro Ultra line. [DELTA 3 Ultra Plus · 3 entries]
- Reviewers report solid UPS/pass-through charging performance with no noticeable switchover issues or output throttling tied to input wattage. [DELTA 3 Ultra Plus · 2 entries]
- The unit's high weight (~74 lbs) and premium MSRP are repeatedly flagged as drawbacks, though discounted street pricing is seen as making the value proposition much stronger. [DELTA 3 Ultra Plus · 3 entries]
- Build quality/durability is praised as substantial and non-fragile across multiple independent reviews. [DELTA 3 Ultra Plus · 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? · unknown · [positive]
- A2
“we'd probably say the noise it creates is similar to what you hear when you run the DELTA Pro Ultra, which is pretty amazing”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · unknown · [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? · unknown · [mixed]
- A5
“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]
- 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]
- A7
“while facing the sun, I had to employ the classic "cup hands cover" maneuver to get a clear look at the screen status”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11 · [mixed]
- A8
“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”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11 · [positive]
- A9
“Weighing in at a thunderous 74 pounds, the Ultra is not considered lightweight by any standards”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11 · [mixed]
- A13
“Each unit operates quietly at under 25dB, remaining unobtrusive even during sustained loads”
storagereview.com — EcoFlow DELTA 3 Max Plus & Ultra Plus Review · 2025-09-30 · [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]
- B5
“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]
- 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]
- 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 Plus if you…
- →You might grow it. It takes EcoFlow's extra batteries; the DELTA 4 (3000) has no port for oneB6.
- →Sun is your refill plan. 1,600 W of solar input against 1,000 W.
- →It lives in an RV. The 30 A outlet is the RV kind, and there's a 12 V car socket.
- →You need it before December. It's on sale now at $1,599, and the DELTA 4 ships in early DecemberB10.
Buy the DELTA 3000 Gen4 if you…
- →You'll carry it often. 57.3 lb against 74.3 lb for the same 3,072 Wh.
- →It cycles every day, on a cabin's solar or an off-grid shed: 6,000 cycles against 4,000.
- →3,072 Wh is the job and always will be: a cabin weekend, or a fridge and router through one night out.
If neither fits
If all you need is a CPAP and a phone through the night, this is far too much battery. The CPAP night uses 12% of either, so a station a fraction of the size and weight does the same job.
The Bottom Line
Same battery, same inverter, so I'd pay for the parts around them: buy the DELTA 3 Ultra Plus. It grows, takes 600 W more sun and plugs into an RV, for about the same money.
Buy the DELTA 4 (3000) if you'll carry it often and cycle it daily. Being 17 lb lighter with a longer cycle rating is a real case. It's just a narrower one.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Do the DELTA 3 Ultra Plus and DELTA 4 (3000) have the same battery?
Yes. Both hold 3,072 Wh, and both run 3,600 W with a 7,200 W surge. The DELTA 4 (3000) weighs 57.3 lb and the DELTA 3 Ultra Plus weighs 74.3 lb.
Can the DELTA 4 (3000) take an extra battery?
No. It has no extra-battery port, so 3,072 Wh is all it will ever hold. The DELTA 3 Ultra Plus takes EcoFlow's extra batteries.
How much does the DELTA 4 (3000) cost in the US?
EcoFlow lists it at $1,699 on its US store and says it ships in early December. The DELTA 3 Ultra Plus sells for $1,599.
Which one charges faster from solar?
The DELTA 3 Ultra Plus. It accepts 1,600 W of solar, against 1,000 W on the DELTA 4 (3000)'s single input.
Does the DELTA 4 (3000) last longer than the DELTA 3 Ultra Plus?
On paper, yes. EcoFlow rates it for 6,000 cycles against 4,000, which at one full cycle a day is 16.4 years against 11. A backup unit used a few times a year won't come close to either number.
Where to buy
EcoFlow DELTA 3 Ultra PlusPick
$1,599.00
$1,599.00 · direct from EcoFlow
Last checked 31 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.