Head-to-head test
EcoFlow DELTA 3 Classic vs EcoFlow DELTA 3000 Gen4Three Times the Battery, Twice the Cycles. Do You Need It?
The Classic is the cheaper watt-hour on the shelf and the DELTA 4 (3000) is rated for twice the cycles, but neither box ever takes another battery. I'd buy the DELTA 4 (3000) if a blackout is why you're shopping, and the Classic if your longest night is a CPAP.
Black Friday · 23 days out
Price to beat:DELTA 3 Classic $449
The lowest we have recorded. A Black Friday price above it is a sale this unit has already had.
Full profiles: EcoFlow DELTA 3 Classic → · 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
The DELTA 4 (3000) is three DELTA 3 Classics of battery behind twice the inverter.
It's 3,072 Wh against 1,024 Wh, and 3,600 W continuous against 1,800 W, with a 7,200 W surge for motors that pull hard at switch-on. It weighs 57.3 lb to the Classic's 26.7 lb. Neither box takes an extra batteryB6, so whichever you buy is the size you keep.
The Classic is built for a night, not an outage.
A CPAP night uses 37% of its usable battery, and a tailgate leaves it 200 Wh spare. Our eight-hour blackout needs 1,645 Wh. The Classic gets a little past halfway, and the DELTA 4 (3000) finishes with 966 Wh still in it.
The bigger box is not the bargain per watt-hour.
At $1,699 against $499, the DELTA 4 (3000) costs more for each watt-hour on the shelf. The premium buys a battery rated for 6,000 cycles against the Classic's 3,000, a 30 A twist-lock outletB3, and a blackout runtime no single Classic reaches. EcoFlow put it on sale on November 4 and says it ships in early DecemberB10.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
On a box that takes extra batteries, falling short is only a first step, because you add a pack later. Neither of these allows that. A Classic bought for blackouts stays a box that goes dark partway through the night, and the fix is a second station, not an add-on.
DELTA 3 Classic: 1,024 Wh, 870 Wh usable after the flat 15% allowance8-Hour Blackout needs 1,645 Wh: the Classic is 775 Wh short, the DELTA 4 (3000) finishes with 966 Wh leftNeither has a battery port; the DELTA 4 (3000) is sealed at 3,072 WhB6
Why it mattersIf an outage is the reason you're shopping, size for it now, because neither box lets you size up later.
rated cycles
That rating only pays if you cycle it. Run both to their ratings and the DELTA 4 (3000) works out at $0.09 per lifetime kWh against $0.16 for the Classic. Charge either one from the sun every day and the Classic reaches its rating in about half the years. Park either one in a closet for storms and both ratings stretch over decades, which leaves the Classic's lower price per watt-hour as the number that counts.
Catalogue cost per watt-hour: lower for the DELTA 3 Classic than for the DELTA 4 (3000)Cycle ratings: 6,000 for the DELTA 4 (3000), 3,000 for the ClassicRated lifetime energy: 18,432 kWh against 3,072 kWh
Why it mattersIf it'll charge from the sun most days, count the cycles; if it waits for storms, count the watt-hours.
continuous output
The Classic's battery runs out long before its inverter doesA10. The DELTA 4 (3000) doubles the inverter and triples the battery, so the load that drains a Classic in a short stretch runs three times as long on the bigger box, with a 30 A outlet left over for a heavy cordB3.
DELTA 3 Classic: 1,800 W continuous, 3,600 W surge; one reviewer found it started a small window AC fine but ran it only brieflyA10DELTA 4 (3000): 3,600 W continuous, 7,200 W surge at 120 VB2DELTA 4 (3000): five outlets, one of them a 30 A twist-lockB3; the Classic has three
Why it mattersIf the reason you're shopping is a window AC or anything else with a motor, the Classic will start it and then disappoint you.
solar input
In an outage you'd be refilling from a generator or a kitchen circuit something else shares, and EcoFlow's own advice on a shared circuit is to turn the rate down in the appB4. Turned down, three times the battery takes longer to fill. The Classic refills over a dinner-length generator runA1. The DELTA 4 (3000) wants an afternoon of sun on its one input.
DELTA 3 Classic: one reviewer timed a full wall charge at just under 55 minutesA1DELTA 4 (3000): X-Stream wall charging up to 1,800 W, which is 15 A at 120 V, the full rating of an ordinary 15 A circuitB4DELTA 4 (3000): one solar input at up to 1,000 W, against the Classic's 500 W
Why it mattersIf your recharge plan is short generator runs, the Classic's quick refill counts; if it's a full day of sun, the bigger battery banks more of it.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: Five of our six days fit the DELTA 4 (3000); the Classic covers two and misses a third by 40 Wh.
The Classic wins the short days and loses the long ones. A CPAP night and a tailgate both fit with room to spare. The remote workday misses by just 40 Wh, which switching one small thing off would cover. The blackout and the camping weekend aren't close.
Van Life Daily is the one day the DELTA 4 (3000) can't finish. It needs 4,685 Wh, and this box has no battery port to grow into itB6. If your plans look like that, you want a station that takes extra batteries, and the bigger DELTA 4 is oneB6.
Growth Path
Selected because: Neither takes an extra battery, so 1,024 Wh and 3,072 Wh are the final sizes.
solar input
Neither box grows, and that changes what cheap means. The Classic is sealed at 1,024 Wh and the DELTA 4 (3000) at 3,072 WhB6. You can't buy the small one now and add a battery when money allows. The upgrade path from a Classic is a second Classic or a different station.
I'd size for the worst night, not the usual one. A box that covers an ordinary evening and goes dark in the bad one has failed at the job you bought it for. If you can't say how long your worst outage runs, the bigger box is the safer guess.
Lifetime Value
Selected because: The Classic is cheaper to buy per watt-hour; the DELTA 4 (3000) is rated for twice the cycles.
cost / lifetime kWh
The Classic is the cheaper battery to buy, and the DELTA 4 (3000) is the cheaper one to wear out. Per watt-hour on the shelf, the Classic costs less. Run each to its cycle rating and the DELTA 4 (3000) delivers energy at $0.09 per kWh against $0.16 for the Classic, because it's rated for twice the cycles (6,000 against 3,000) and each of its cycles is three times the energy.
That lifetime figure assumes you actually use the cycles. Charged daily from the sun, the Classic reaches its rating in 8.2 years and the DELTA 4 (3000) in 16.4 years. Kept in a closet for storms, neither gets anywhere near its rating, and the shelf price is the only cost you'll feel.
Portability & Form Factor
Selected because: 30.6 lb more to carry for 2,048 Wh more battery.
weight
The Classic goes in the car with one hand. It's 26.7 lb on one centered handleA11, against 57.3 lb for the DELTA 4 (3000) with a handle at each endB7. EcoFlow sells a folding cart for the bigger box separatelyB7, which says how often it expects you to carry it.
Those 30.6 lb buy 2,048 Wh. That's a good trade if the box lives by the fridge and a poor one if it rides to a campsite every weekend.
What the Specs Don't Tell You
Selected because: The same five years of cover on both, and noise figures that aren't measured the same way.
rated cycles
The warranty is a draw. Both carry three years plus two more when you register in the EcoFlow appB9, so five years each on the same terms.
The noise figures don't settle a bedside question. EcoFlow rates the DELTA 4 (3000) at 40 dB or less up to 1,800 WB8, which is a ceiling under load. Our record doesn't say at what load the Classic's 30 dB was taken, so the two numbers aren't the same kind of figure.
Every port, labelled
What plugs in where, and how much it takes
EcoFlow DELTA 3 Classic
Front panel
- 1USB-C · 100 WOutPrinted USB-C 100W. Up to 100 W (20 V at 5 A) by EcoFlow’s spec table: the port for a laptop.
- 2USB-C · 30 WOutPrinted USB-C 30W. Up to 30 W by EcoFlow’s spec table: enough for a phone or tablet.
- 3USB-A · 18 WOutPrinted USB-A 18W. Up to 18 W (5, 9 or 12 V) by EcoFlow’s spec table.
- 43× AC outletsOutThree outlets, two T-slot and one two-prong, sharing 1,800 W and a 3,600 W surge. X-Boost runs heating-type devices up to 2,600 W.
Photo: EcoFlow · Product image, EcoFlow US store · numbers and labels are ours. Ratings printed on EcoFlow’s panel and listed in the spec table on EcoFlow’s US store page; the surge figure from that page.
Rear panel
- 1Solar/DC in · 500 WInPrinted SOLAR/DC INPUT. An XT60 input taking up to 500 W of solar.
- 2AC in · 1,400 WInPrinted AC CHARGE. 100–120 V at 15 A, charging at up to 1,400 W.
The two inputs sit behind this flap, shown closed. No 12 V car socket and no extra-battery port: EcoFlow’s spec table lists neither.
Photo: EcoFlow · Product image, EcoFlow US store · numbers and labels are ours. Port names printed on EcoFlow’s flap; ratings from the spec table on EcoFlow’s US store page; the connector type 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 Classic
Strengths
- +Costs $1,200 less
- +Lighter by 30.6 lb
Trade-offs
- –Weaker inverter (-1,800W) limits appliance compatibility.
- –Shorter-lived battery — rated for 3,000 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 (+$1,200) than the DELTA 3 Classic.
- –Significantly heavier (+30.6 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 3 Classic doesn't finish — 870Wh usable against the 2,100Wh this needs leaves it 1,230Wh short, about 41% of the scenario covered. The DELTA 3000 Gen4 covers it with 511Wh to spare.
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
The Classic covers a little over half the night and runs 775 Wh short. The DELTA 4 (3000) finishes with 966 Wh in hand, and neither one can add a battery to change that.
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 the night at least twice over, so capacity doesn't decide it, and neither noise figure is a reading at a CPAP's draw. The Classic is the lighter one to set by the bed.
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 Classic misses by 40 Wh, close enough that switching one small thing off for part of the day gets it there. The DELTA 4 (3000) finishes with 1,701 Wh left.
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 handle game day; the DELTA 3000 Gen4 keeps more in reserve (26% used vs 77%). Tailgating is a light load, though, so the number you'll feel is weight: 26.7 lbs for the DELTA 3 Classic against 57.3 lbs for the DELTA 3000 Gen4, from the trunk to the setup spot.
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 Classic comes up 3,815Wh short (about 19% covered), the DELTA 3000 Gen4 2,074Wh (56%). This is well outside what either unit is for; the right answer here is a larger station, not a choice between these two.
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 4.2h.
$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 DELTA 3000 Gen4, on Power Score margin
If a blackout is why you're buying, I'd take the DELTA 4 (3000). It holds 3,072 Wh against the Classic's 1,024 Wh and finishes our eight-hour blackout with 966 Wh left, where the Classic runs out 775 Wh short. Neither takes an extra batteryB6, so the Classic can't catch up later. The DELTA 4 costs more per watt-hour on the shelf, and EcoFlow says it ships in early DecemberB10, while the Classic is on sale now at $499. If one night is your longest job, the call flips and the Classic is the one to buy.
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 3 Classic price$479.00 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 Classic rates 4.0/5 (42nd percentile of 27 Everyday-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 Classic works out at 10 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.
Twice the Cycles Only Pays If You Cycle It
The DELTA 4 (3000) is rated for 6,000 cycles against 3,000, and each of its cycles is three times the energy. Charge it from the sun daily and that rating is worth money. Keep it for storms and neither battery is likely to reach its rating.
Full record above — the Test Desk pick is the DELTA 3000 Gen4.
Check DELTA 3000 Gen4 price →or check the DELTA 3 Classic 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 Classic is cheaper to buy, but the DELTA 3000 Gen4 is cheaper to own. At $0.09/kWh over its lifetime vs $0.16/kWh, the DELTA 3000 Gen4's higher cycle life and capacity make each dollar go further over the years.
Growth path
DELTA 3 Classic
FIXED CAPACITYFixed at 1,024Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
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 Classic
The Classic's field record is early, and it comes from reviewers more than owners. It launched in March 2026, so long-term reports don't exist yetA0. One reviewer timed a full wall charge at just under 55 minutesA1, and the same outlet found it quieter than its price suggestedA3.
Its idle draw is worth knowing for overnight use. That reviewer measured about 17 W with the inverter onA2. Across a long night with little plugged in, that's a real slice of a 1,024 Wh battery spent on the box itselfA2.
“In our tests, the DELTA 3 Classic charged from empty to full plugged into a standard wall outlet in just shy of 55 minutes.”
Sources
thesolarlab.com · vantour.net · smartenergyedge.com · walmart.com
EcoFlow DELTA 3000 Gen4
Nobody owns a DELTA 4 (3000) yet. EcoFlow put it on sale on November 4 and says it ships in early DecemberB10, so everything on this page comes from EcoFlow's US store page and our own arithmeticB0B4.
I'd want to put its wall charger on a real kitchen circuit. At the full 1,800 W it draws 15 A at 120 V, the whole rating of an ordinary 15 A circuitB4. If I had one, I'd run it flat out from empty with the toaster unplugged and feel how warm the plug and the breaker got. Electricians don't plan a continuous load at a breaker's full rating, so if anything ran warm I'd turn the rate down in the app, as EcoFlow suggests for a shared circuitB4.
“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
- Multiple independent reviewers note the unit is quieter than expected for its price point, with low idle drain. [DELTA 3 Classic · 2 entries]
- The 500W solar input cap is flagged as a limiting factor by more than one review outlet, seen as low for a 2026-era release. [DELTA 3 Classic · 2 entries]
- Reviewers praise the app and Storm Guard/smart features as standout software elements. [DELTA 3 Classic · 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
“In our tests, the DELTA 3 Classic charged from empty to full plugged into a standard wall outlet in just shy of 55 minutes.”
thesolarlab.com — EcoFlow DELTA 3 Classic Review: Cheap, Quiet & Useful? · unknown (post-launch 2026) · [positive]
- A2
“We measured the idle draw to be roughly 17W per hour.”
thesolarlab.com — EcoFlow DELTA 3 Classic Review: Cheap, Quiet & Useful? · unknown (post-launch 2026) · [positive]
- A3
“we expected the cooling fans to break that trend given the price point for this unit”
thesolarlab.com — EcoFlow DELTA 3 Classic Review: Cheap, Quiet & Useful? · unknown (post-launch 2026) · [positive]
- A10
“The 1,800W inverter handles the startup surge of a small window AC unit just fine, but the runtime is short.”
smartenergyedge.com — EcoFlow DELTA 3 Classic Review: Better Than the DELTA 2? · 1 week ago (~July 2026) · [mixed]
- A11
“The handle is solid and centered well.”
smartenergyedge.com — EcoFlow DELTA 3 Classic Review: Better Than the DELTA 2? · 1 week ago (~July 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]
- B9
“Rated for 6,000 cycles (EcoFlow: "15+ years"). Charges at 32–113°F (0–45°C), runs at 14–113°F (−10–45°C). Wi-Fi and Bluetooth with the EcoFlow app. Warranty: 3 years plus a 2-year extension when registered 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]
- 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 Classic if you…
- →Your longest job is one night. A CPAP uses 37% of its usable battery.
- →You carry it. It's 26.7 lb on one centered handleA11, to a tailgate or a campsite.
- →You need it this week. It's on sale now at $499.
- →You'd refill from a generator in short runs. One reviewer filled it from the wall in under an hourA1.
Buy the DELTA 3000 Gen4 if you…
- →A blackout is the reason you're shopping. It finishes our eight-hour blackout with 966 Wh left.
- →You run bigger loads. 3,600 W continuous and a 7,200 W surge, against 1,800 W and 3,600 W.
- →It'll charge from the sun most days. It's rated for 6,000 cycles against 3,000.
- →You can wait a month. EcoFlow says it ships in early DecemberB10.
If neither fits
If your days look like Van Life Daily at 4,685 Wh, skip both. Neither box takes an extra battery, so look at one that does, such as the bigger DELTA 4B6.
The Bottom Line
If the job is a blackout, I'd buy the DELTA 4 (3000). It's three Classics of battery behind twice the inverter, it finishes the night the Classic can't, and neither box lets you add a battery later.
If the job is a CPAP night or a tailgate, buy the Classic. It's on sale now, it's 26.7 lb, and on those nights it still goes to bed with battery left.
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. EcoFlow says it ships in early December. The DELTA 3 Classic is $499 and on sale now.
Can the DELTA 3 Classic get through a power outage?
A short one. It has about 870 Wh usable, and our eight-hour blackout needs 1,645 Wh, so it covers a little over half. It handles a CPAP night with plenty left.
Can I add a battery to the DELTA 4 (3000) or the DELTA 3 Classic later?
No. The DELTA 4 (3000) is sealed at 3,072 Wh with no extra-battery port, and the DELTA 3 Classic is fixed at 1,024 Wh. Buy the size you need now.
Which one charges faster from the wall?
The Classic fills sooner. One reviewer charged it from empty in just under 55 minutes. The DELTA 4 (3000) takes up to 1,800 W from a US outlet, the full 15 A of an ordinary circuit, but it has three times the battery to fill.
Is the DELTA 4 (3000) worth it over the DELTA 3 Classic?
If you're buying for blackouts, yes. It finishes an eight-hour blackout the Classic only gets halfway through, runs twice the load, and is rated for twice the cycles. If one night is your longest job, the Classic costs less per watt-hour and does that night with room left.
Where to buy
EcoFlow DELTA 3 Classic
$479.00
$479.00 · direct from EcoFlow
Last checked 31 days ago. Prices move — check before you buy.
EcoFlow DELTA 3000 Gen4Pick
$1,699.00
$1,699.00 · direct from EcoFlow
Prices may vary by retailer and are subject to change.