Head-to-head test
EcoFlow DELTA 3 Max vs EcoFlow DELTA 3000 Gen4Half Again the Battery and the Inverter. Worth the Price?
The DELTA 4 (3000) gives you exactly half again the battery and half again the inverter, at about a quarter more per watt-hour, and neither box will ever take an extra battery. I'd buy the DELTA 3 Max, unless your outages run into a second night or you need to run several big loads at once.
Black Friday · 23 days out
Price to beat:DELTA 3 Max $799
The lowest we have recorded. A Black Friday price above it is a sale this unit has already had.
Full profiles: EcoFlow DELTA 3 Max → · 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
Neither of these will ever hold more than it does on the day you buy it.
The DELTA 3 Max is sealed at 2,048 Wh and the DELTA 4 (3000) at 3,072 Wh, with no battery port on eitherB6. So this is a sizing decision, and you make it once.
The bigger box is the dearer watt-hour.
The DELTA 3 Max sells for $899, and EcoFlow lists the DELTA 4 (3000) at $1,699B10. That's $800 more for half again the battery and half again the inverter, or about a quarter more per watt-hour of storage.
I'd keep the money unless you know you need the headroom.
The DELTA 3 Max gets through a night-long outage, a CPAP night, a workday and a tailgate. It's also 12.5 lb lighter, it keeps the 12 V car socket the DELTA 4 droppedB3, and it isn't waiting on a ship date. The DELTA 4 (3000) ships in early DecemberB10.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
Storm outages don't end on cue. On the DELTA 3 Max a second evening starts with a recharge, and no port will ever change that. The DELTA 4 (3000) carries most of the second evening into the morning with it.
Neither takes an extra battery: 2,048 Wh and 3,072 Wh are the ceilingsB68-Hour Blackout needs 1,645 WhUsable at our 85% rule: 1,741 Wh against 2,611 Wh
Why it mattersIf your outages run past one night, that reserve is the strongest reason on this page to pay the gap.
continuous output
That matters when several heavy things run at once: a well pump while the microwave runs, a shop heater beside a chest freezer. Our six scenarios never come near either inverter's limit. For lights, a fridge, a router and a CPAP, the DELTA 3 Max's 2,400 W is more than you'll draw.
DELTA 4 (3000): 3,600 W continuous, 7,200 W surge, at 120 VB2One of its five outlets is a 30 A twist-lockB3DELTA 3 Max: 2,400 W continuous, 4,800 W surgeNo scenario on this page asks for more than 400 W at peak
Why it mattersPay for the bigger inverter only if you can name the big loads that would run together.
weight
A 12 V cooler plugs straight into that socket and skips the inverter, the part that turns battery power into household AC and loses some on the way. On a day out both boxes carry far more than the day needs, so the lighter one with the right socket is the better tool.
DELTA 3 Max: 44.8 lb, one 12 V car socketDELTA 4 (3000): 57.3 lb, no 12 V car socketB3Tailgate Party: 670 Wh, which both finish with more than 1,000 Wh left
Why it mattersIf this rides in the car most weekends, buy the DELTA 3 Max whatever you decide about outages.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: The DELTA 3 Max finishes four of the six scenarios but ends the 8-Hour Blackout with 96 Wh left.
The two split on the long jobs and agree on the short ones. A CPAP night, a remote workday and a tailgate fit either box with at least 831 Wh to spare. Weekend Camping asks for 2,100 Wh, and there the DELTA 3 Max runs 359 Wh short while the DELTA 4 (3000) has 511 Wh left over.
The blackout row is the one I'd stare at. The DELTA 3 Max ends the night at 94% used, which leaves a few phone charges of slack and not much else. Van Life Daily's 4,685 Wh beats both boxes, and with no battery port on either, it stays beaten.
Growth Path
Selected because: Neither box takes an extra battery, so 2,048 Wh and 3,072 Wh are the sizes for good.
solar input
There's no second act on either box. No expansion port on the DELTA 3 Max and none on the DELTA 4 (3000)B6, so you're buying the ceiling you'll live with. That isn't a flaw in a sealed box. It moves the whole decision to the checkout.
Size up only for a night you can picture. Buying too big costs you $800 and 12.5 lb, once. Buying too small costs you a second station later, because there's nothing to bolt on. If you can't name the evening that needs the extra kilowatt-hour, you probably don't have one.
Lifetime Value
Selected because: The DELTA 4 (3000) costs more per watt-hour up front and less per kilowatt-hour over its rated life.
cost / lifetime kWh
Here's the honest catch against my pick. Over its rated life the DELTA 4 (3000) is the cheaper energy, $0.09 per lifetime kWh against $0.11, because 6,000 cycles on a bigger battery add up to more than twice the DELTA 3 Max's lifetime energy.
That only pays if you actually cycle it. At one full cycle a day the DELTA 3 Max lasts 11 years on its 4,000-cycle rating, against 16.4 for the DELTA 4 (3000). A backup box that runs a handful of nights a year never gets near either, so you pay the up-front price, not the lifetime one, unless it runs an off-grid cabin every day.
Portability & Form Factor
Selected because: 44.8 lb against 57.3 lb, and only the lighter box has a 12 V car socket.
weight
The 12.5 lb shows up on every trip and never at home. At 44.8 lb the DELTA 3 Max goes from trunk to campsite without a plan. At 57.3 lb the DELTA 4 (3000) is a two-handed lift, which is why EcoFlow gave it a handle at each end and sells a folding cart separatelyB7.
The socket matters as much as the weight. The DELTA 4 has no 12 V car outletB3, so a 12 V cooler needs its AC adapter and a trip through the inverter. For a box that parks beside the fridge, none of this matters. For one that rides along, the DELTA 3 Max is the better travelling box.
Every port, labelled
What plugs in where, and how much it takes
EcoFlow DELTA 3 Max
Front panel
- 1USB-C · 100 WOutUp to 100 W (20 V at 5 A), printed on the panel and in EcoFlow’s specs.
- 22× USB-C · 30 WOutTwo USB-C ports printed 30W. EcoFlow’s specs say 30 W per port and 30 W in total, so the pair share 30 W.
- 3USB-A · 18 WOutUp to 18 W (5 V at 3 A, 9 V at 2 A or 12 V at 1.5 A), printed on the panel and in EcoFlow’s specs.
- 44× 20 A outletsOutFour T-slot 120 V outlets, 20 A max each, sharing 2,400 W in all. X-Boost runs heaters up to 3,400 W, by EcoFlow’s specs.
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 DELTA 3 Max.
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.
- 3Solar in · 500 WInOne XT60 input printed 11–60 V, 13 A max. EcoFlow puts the most solar the unit takes at 500 W.
- 412 V car socket · 10 AOutA 12 V car socket rated 12.6 V, 10 A, 126 W by EcoFlow’s specs, with a 12V ON/OFF button beside it.
No battery port: the base DELTA 3 Max has a single XT60 input and takes no extra battery. The Max Plus adds one.
Photo: EcoFlow · Product image, EcoFlow US store · numbers and labels are ours. Port names and the solar rating printed on EcoFlow’s panel; the rest from the specs on EcoFlow’s US store page for the DELTA 3 Max.
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 Max
Strengths
- +Costs $800 less
- +Lighter by 12.5 lb
Trade-offs
- –Weaker inverter (-1,200W) limits appliance compatibility.
- –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
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$800) than the DELTA 3 Max.
- –Significantly heavier (+12.5 lbs), making it harder to move.
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 weekend with 511 Wh spare. The DELTA 3 Max runs 359 Wh short, so Sunday afternoon starts with a recharge.
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 3000 Gen4
Both finish the 1,645 Wh night. The DELTA 3 Max has 96 Wh left by morning. The DELTA 4 (3000) has 966 Wh, more than half of a second evening.
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, so capacity doesn't decide this. Noise can't either: EcoFlow's DELTA 4 figure is a ceiling under heavy load, and neither published figure describes a CPAP's small draw. Break the tie on the carry and the price, where the DELTA 3 Max is the lighter and cheaper box.
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 3000 Gen4
The DELTA 3000 Gen4 clears the workday at 35% used, banking 1,701Wh — late work, extra calls, or a second laptop charge without arithmetic. The DELTA 3 Max at 52% also finishes, with 831Wh 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
Both cover the 670 Wh with plenty left, and the DELTA 4 (3000) keeps more in reserve. The DELTA 3 Max is the one that's 12.5 lb lighter and has a 12 V socket for the cooler.
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 unit covers this scenario's 4,685Wh: the DELTA 3 Max comes up 2,944Wh short (about 37% covered), the DELTA 3000 Gen4 2,074Wh (56%). Treat this as partial cover — enough for the essentials in it, not the whole list.
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 3000 Gen4 runs 12.7h vs 8.5h.
$1,699 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 0–174.1hComfort & 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 EcoFlow DELTA 3 Max
I'd buy the DELTA 3 Max, unless your outages run into a second night or you run several big loads at once. Neither box takes an extra batteryB6, so you're choosing a ceiling for good. The DELTA 4 (3000) raises both ceilings by exactly half, to 3,072 Wh and a 3,600 W inverter, but at $1,699 against $899 it costs about a quarter more per watt-hour, weighs 12.5 lb more and ships in early DecemberB10. The DELTA 3 Max finishes the 8-Hour Blackout with 96 Wh left, which is enough for one night and not for two. If a second dark evening is a real prospect where you live, the $800 buys exactly that reserve, 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.
$879.00 · 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): CPAP, Camping.
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 Max rates 4.0/5 (43rd 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.
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. Worth saying because the per-dollar framing can suggest otherwise: the DELTA 3 Max works out at 5.6 years of cover per $1,000 spent against the DELTA 3000 Gen4's 2.9, 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 4,000. In real life: at daily use, that's 16.4 vs 11 years. At weekend use (twice a week), it's 58 vs 38 years. One caution reading years across different sizes: a cycle is 3,072Wh on the DELTA 3000 Gen4 and 2,048Wh on the DELTA 3 Max, so count lifetime energy — roughly 18,432 kWh against 8,192 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 3 Max.
Check DELTA 3 Max 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 Max 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 Max
FIXED CAPACITYFixed at 2,048Wh — 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 500W 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. Buy the capacity that covers your needs now (the DELTA 3000 Gen4 gives you the larger ceiling); you can't add to either later.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Max
The reviewers who've lived with it like it. They describe it as near silent at moderate load, with an app quiet mode and a charge-speed limit for when the fans riseA1A2. One hands-on reviewer saw capacity hold steady from the one-month test to the three-month test after a truck-bed ride, a 105°F garage and a run near 34°FA3, and scored it 8.5 out of 10A4.
It's review evidence, not long owner threads. Some coverage blurs the DELTA 3 Max with the DELTA 3 Max Plus, so I'd trust the noise and app reports over any single figureA0.
“Whisper-quiet under moderate load — essentially silent at conversational distance; the app adds a low-power quiet mode and a custom charge-speed limit if fan noise bothers you. Fans rise under heavy load but stay quieter than most competitors in the 2kWh class.”
Sources
backuppowerhub.com · thesolarlab.com · androidguys.com
EcoFlow DELTA 3000 Gen4
Nobody owns a DELTA 4 (3000) yet. It went on sale on November 4 and ships in early DecemberB10, so everything here is EcoFlow's US spec table plus our own arithmeticB0B2.
If I had one on my bench, I'd load the twist-lock to the full 3,600 W and leave it there for an hour. EcoFlow rates it for that continuously at 120 VB2B3. I'd want to see whether it holds without throttling once the fans have been at it a while, and what EcoFlow's 50 dB ceiling at full output sounds like in a garageB8.
“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 practical quietness (with app-based quiet/charge-limit modes) and the EcoFlow app/ecosystem as differentiators. [DELTA 3 Max · 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
“Whisper-quiet under moderate load — essentially silent at conversational distance; the app adds a low-power quiet mode and a custom charge-speed limit if fan noise bothers you. Fans rise under heavy load but stay quieter than most competitors in the 2kWh class.”
backuppowerhub.com — EcoFlow DELTA 3 Max Review; thesolarlab.com — DELTA 3 Max Review · 2026 · [positive]
- A2
“The EcoFlow app is one of the main reasons people migrate to the ecosystem: deep control including a custom charge-speed limit and quiet mode, well beyond the on-device interface.”
androidguys.com / thesolarlab.com — EcoFlow DELTA 3 Max line · 2026 · [positive]
- A3
“Capacity stayed consistent between 1-month and 3-month tests (within measurement error). The unit survived truck-bed transport, storage in a ~105°F garage, and operation near freezing (~34°F) without issue.”
backuppowerhub.com — EcoFlow DELTA 3 Max Review (hands-on) · 2026 · [positive]
- A4
“Rated 8.5/10 overall — strong across nearly every metric in the 2kWh class, with fast recharge and LFP longevity called one of the best value propositions in the segment.”
backuppowerhub.com — EcoFlow DELTA 3 Max Review · 2026 · [positive]
- 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 Max if you…
- →It rides in the car. 44.8 lb, with a 12 V socket for the cooler.
- →Your outages last a night, not a week. It gets through the 8-Hour Blackout with a little to spare.
- →You need it before December. The DELTA 4 (3000) ships in early DecemberB10.
- →2,048 Wh covers your list. A CPAP night uses 18% of it.
Buy the DELTA 3000 Gen4 if you…
- →Outages here run into a second night. It ends the 8-Hour Blackout with 966 Wh still in it.
- →You'll run big loads together. A 3,600 W inverter, and a 30 A twist-lock that can carry all of itB3.
- →You'd rather buy the ceiling once. Neither expands, and this one stops at 3,072 Wh.
- →You'll cycle it daily. 6,000 cycles make it the cheaper energy over its life.
If neither fits
If you want to start small and add batteries over the years, skip both. Neither has a battery port. Look at an expandable unit instead, such as the bigger DELTA 4 or the DELTA Pro 3.
The Bottom Line
Buy the DELTA 3 Max if one night is the longest outage you plan for. It's the cheaper watt-hour, it's 12.5 lb easier to carry, and it covers the everyday jobs. Its weak spot is a thin morning after a long night.
Pay for the DELTA 4 (3000) if a second dark evening is real where you live. Neither box will ever grow, so the reserve you buy is the reserve you keep.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
How much does the EcoFlow DELTA 4 (3000) cost in the US?
EcoFlow lists it at $1,699 on its US store, where it went on sale on November 4, 2026, and says it ships in early December. The DELTA 3 Max sells for $899.
Can the DELTA 3 Max or the DELTA 4 (3000) take an extra battery?
No. Neither has a battery port. The DELTA 3 Max stays at 2,048 Wh and the DELTA 4 (3000) at 3,072 Wh, so buy the size you'll need.
Will the DELTA 3 Max get through a night without power?
Yes, with little to spare. Our 8-hour blackout uses 1,645 Wh, and the DELTA 3 Max finishes with 96 Wh left. The DELTA 4 (3000) finishes the same night with 966 Wh.
Is the DELTA 4 (3000)'s bigger inverter worth paying for?
Only if you run several heavy loads at once. It's rated 3,600 W continuous and 7,200 W surge, against 2,400 W and 4,800 W for the DELTA 3 Max. None of the six scenarios we model asks for more than 400 W at peak.
How fast does the DELTA 4 (3000) charge from the wall?
Up to 1,800 W, by EcoFlow's figure. At 120 V that's 15 A, the full rating of an ordinary 15 A circuit, so on a circuit shared with other appliances you'd set a lower rate in the EcoFlow app.
Where to buy
EcoFlow DELTA 3 MaxPick
$879.00
$879.00 · 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.