Head-to-head test
EcoFlow DELTA 3 vs EcoFlow DELTA 3000 Gen4Three Times the Battery, and It Will Never Grow. Buy It Once?
EcoFlow DELTA 3 vs EcoFlow DELTA 3000 Gen4: the DELTA 4 (3000) holds 3,072 Wh against 1,024 Wh and runs 3,600 W against 1,800 W, at a bit over twice the weight, and it can never add a battery. For blackout backup I'd buy it. Pick the DELTA 3 if your loads are small, it rides in your car, or you want to grow one battery at a time.
Black Friday · 23 days out
Price to beat:DELTA 3 $519
The lowest we have recorded. A Black Friday price above it is a sale this unit has already had.
Full profiles: EcoFlow DELTA 3 → · 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 gave the DELTA 4 (3000) three times the DELTA 3's battery and no way to add more.
It holds 3,072 Wh against 1,024 Wh, and there's no extra-battery port on it anywhereB6. The DELTA 3 starts smaller and takes extra batteries. So this is a choice between buying the size once and growing into it.
The inverter doubled too, and that's what I'd feel first in a blackout.
The DELTA 4 (3000) runs 3,600 W and surges to 7,200 W at 120 VB2, against 1,800 W and 3,600 W on the DELTA 3. I wire houses for a living, so the arithmetic jumps out: 3,600 W at 120 V is 30 A, which is exactly what its twist-lock outlet is rated forB2B3. On the DELTA 3 it's the microwave or the coffee maker. On the DELTA 4 (3000) it's both at once.
It lists at $1,699, against $629 for the DELTA 3.
That's $1,070 more, but per watt-hour the DELTA 4 (3000) is the slightly cheaper box, and it's rated for 6,000 cycles against at least 4,000. EcoFlow says it ships in early DecemberB10. The DELTA 3 is on sale now.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
Up to 3,072 Wh, the DELTA 3's expansion buys back capacity the DELTA 4 (3000) ships with, in two boxes and a cable instead of one, and the big box already costs less per watt-hour. Past 3,072 Wh the DELTA 3 is the only one of the two that can keep going. That is the one question the sealed box can never answer.
DELTA 3: 1,024 Wh, takes EcoFlow extra batteriesDELTA 4 (3000): 3,072 Wh, no extra-battery portB6DELTA 4 (3000): a little cheaper per watt-hour than the DELTA 3
Why it mattersIf you're sure 3,072 Wh covers your worst night, buy it once. If you can't say yet, the DELTA 3 keeps the question open.
continuous output
Surge is what starts a compressor or a pump. The DELTA 3's surge rating is the DELTA 4 (3000)'s continuous rating, so whatever the small box can only manage for the moment a motor kicks on, the big one carries all evening. In a blackout that's the difference between taking turns at the outlet and not thinking about it.
DELTA 3: 1,800 W continuous, 3,600 W surgeDELTA 4 (3000): 3,600 W continuous, 7,200 W surge at 120 VB2DELTA 4 (3000): one twist-lock outlet rated 30 AB3
Why it mattersIf your outage list has a motor in it, the inverter decides this before the battery does.
The handoff is a tie, so the router doesn't care which box caught it. What differs is when the lights go out again. A box that covers half the night hands you a choice in the small hours about which half of the house to unplug.
8-Hour Blackout needs 1,645 WhDELTA 3: 870 Wh usable after a flat 15% allowanceDELTA 4 (3000): 2,611 Wh usableBoth switch over in no worse than 10 ms
Why it mattersIf you're buying for outages, size for the whole night, because both boxes catch the drop equally well.
The specific dimensions that decide these two units — everything else is a tie.
Growth Path
Selected because: The DELTA 3 takes extra batteries. The DELTA 4 (3000) starts at three times the size and stops there.
solar input
The DELTA 3's battery port is a real option, but here it mostly buys back what the DELTA 4 (3000) already holds. Getting the small box to 3,072 Wh takes twice its own capacity again in extra batteries and a second box on the floor. It only pulls ahead past that size, and past that size is the one place the DELTA 4 (3000) can't follow.
My pick's honest weakness is that 3,072 Wh is the ceiling for good. EcoFlow lists expansion only for the bigger DELTA 4, not this oneB6. If a chest freezer joins the outage list later, the upgrade is a second station. If you can't rule that out, the DELTA 3 or the bigger DELTA 4 keeps the door open.
Your Life, Your Pick
Selected because: The DELTA 3 runs 775 Wh short of an eight-hour blackout, and the DELTA 4 (3000) finishes with 966 Wh left.
Half a night isn't a night. On its own the DELTA 3 covers about half our eight-hour blackout and runs out 775 Wh early. The DELTA 4 (3000) finishes with 966 Wh left. The weekend camping load is the same story bigger: the DELTA 3 is 1,230 Wh short, and the DELTA 4 (3000) covers it with 511 Wh to spare.
The remote workday is the near miss worth knowing about. The DELTA 3 falls 40 Wh short, so one small gadget fewer and it finishes. A CPAP night and a tailgate both fit in the DELTA 3 with room left. For jobs that size, the bigger box is battery you carry and never touch.
Lifetime Value
Selected because: Both carry rated cycle counts, and the sealed box is the cheaper energy over its life.
cost / lifetime kWh
Over its life, the sealed box is the cheaper energy. The DELTA 4 (3000) works out at $0.09 per lifetime kilowatt-hour against $0.15 for the DELTA 3, well under two-thirds the cost. Three times the battery and half again the rated cycles is what does it.
That figure only pays out if you actually cycle the battery. A box that sits at full charge waiting for an outage never collects it. If you run it every weekend or off solar daily, it's a real reason to buy once. For a closet backup that sees a few outages a year, the price gap matters more than the lifetime figure.
Portability & Form Factor
Selected because: 27 lb against 57.3 lb, and only the light one has a car socket.
weight
The DELTA 3 is the one that goes places. At 27 lb it's a one-hand carry to the car, and it has a car socket for a cooler on the drive. The DELTA 4 (3000) weighs 57.3 lb, carries by a handle at each end, and EcoFlow sells its cart separatelyB7. It has no car socket at allB3.
Per pound, the trade runs the other way. The DELTA 4 (3000) carries three times the battery for a bit over twice the weight. If it lives beside the fridge, you lift it once and stop thinking about it.
Every port, labelled
What plugs in where, and how much it takes
EcoFlow DELTA 3
Front panel
- 12× USB-C · 100 WOutTwo USB-C ports, printed USB-C 100W: up to 100 W each by EcoFlow’s spec table. Ports for laptops.
- 22× USB-A · 18 WOutTwo USB-A ports printed FAST CHARGE, 18 W max by EcoFlow’s spec table.
- 36× AC outletsOutSix outlets, three two-prong and three T-slot, sharing 1,800 W and a 3,600 W surge. X-Boost runs devices up to 2,200 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.
Rear panel
- 1Solar/car in · 500 WInPrinted SOLAR/CAR INPUT. An XT60 input, 11 to 60 V, up to 500 W of solar.
- 2Battery portIn · OutPrinted EXTRA BATTERY PORT. Takes one DELTA 3, DELTA 2, DELTA 2 Max or DELTA Pro 3 extra battery, up to 5 kWh in all by EcoFlow’s figure.
- 3AC in · 1,500 WInPrinted AC CHARGE. Charges at up to 1,500 W.
- 412 V car socket · 126 WOutA capped car socket, 12.6 V at 10 A, 126 W max.
- 52× DC5521 · 3 AOutTwo DC5521 barrel outputs, 12.6 V at 3 A max; 3A MAX is printed between them.
The three inputs sit behind the flap, shown closed. The DC ON/OFF button switches the car socket and the barrel ports.
Photo: EcoFlow · Product image, EcoFlow US store · numbers and labels are ours. Port names printed on EcoFlow’s panel; ratings and battery list 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
Strengths
- +Costs $1,070 less
- +Lighter by 30.3 lb
Trade-offs
- –Weaker inverter (-1,800W) 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 (+$1,070) than the DELTA 3.
- –Significantly heavier (+30.3 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 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 DELTA 3 covers about half the night and runs 775 Wh short. The DELTA 4 (3000) gets to morning with 966 Wh left.
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 at least twice over — capacity isn't the question here. The only published difference is fan noise, and it can't settle this: the DELTA 3 is rated 30dB and the DELTA 3000 Gen4 40dB, but the DELTA 3'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
DELTA 3000 Gen4
The DELTA 3 misses by 40 Wh, about one small gadget across the day. The DELTA 4 (3000) finishes with 1,701 Wh to spare.
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 get through game day, and the DELTA 4 (3000) keeps far more in reserve. What you'll notice is the carry from the trunk: 27 lb against 57.3 lb.
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 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
For blackout backup, I'd buy the DELTA 4 (3000). It holds 3,072 Wh against 1,024 Wh, runs 3,600 W against 1,800 W, and at $1,699 against $629 it costs a little less per watt-hour than the DELTA 3. On its own the DELTA 3 runs 775 Wh short of our eight-hour blackout. The DELTA 3 is the better buy if your load is a CPAP or a laptop, if the box rides in your car at 27 lb, or if you'd rather add batteries one at a time, because the DELTA 4 (3000) has no battery port at allB6. That sealed ceiling and a wait until early December for it to shipB10 keep this a firm lean rather than a lock.
Today the DELTA 3 is $579, $50 under its typical $629. The verdict weighs typical prices, not today's. Prices checked 31 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.
$1,699.00 · direct from EcoFlow
or check the DELTA 3 price$579.00 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 rates 4.5/5 (73rd 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.
What You Buy Is the Ceiling
The DELTA 4 (3000) has no extra-battery port, so 3,072 Wh is the most it will ever hold. The DELTA 3 starts at 1,024 Wh and takes extra batteries, which only beats the bigger box once you'd want more than 3,072 Wh.
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 works out at 7.9 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 1,024Wh on the DELTA 3, so count lifetime energy — roughly 18,432 kWh against 4,096 kWh over the rated life. After hitting the cycle limit, the battery doesn't die — it drops to ~80% of original capacity, which is still very usable.
Full record above — the Test Desk pick is the DELTA 3000 Gen4.
Check DELTA 3000 Gen4 price →or check the DELTA 3 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 is cheaper to buy, but the DELTA 3000 Gen4 is cheaper to own. At $0.09/kWh over its lifetime vs $0.15/kWh, the DELTA 3000 Gen4's higher cycle life and capacity make each dollar go further over the years.
Growth path
DELTA 3
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 1,024Wh.
Accepts up to 500W of solar. Suitable for a 1-2 panel setup.
Generous port selection supports complex multi-device setups.
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
Don't read the DELTA 3's expandability as a straight win here: it starts at 1,024Wh, below the DELTA 3000 Gen4's 3,072Wh, so a first expansion battery largely buys back capacity the DELTA 3000 Gen4 already includes. It only pulls ahead if you'd grow past 3,072Wh — short of that, the DELTA 3000 Gen4's larger fixed capacity is the simpler value.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3
Field evidence on the plain DELTA 3 is thinner than its name suggests. Our research found most published testing covers the Plus, Max and Ultra versionsA0. One hands-on review found the fans stay off under 200 W, which means a CPAP or a router running in silenceA1. A switchover test where routers rode through a power cut was on the DELTA 3 Plus, which shares the 10 ms ratingA2, so I count it as a family trait, not a test of this box.
“At low loads (under 200W) the fans often stay completely off, making the Delta 3 effectively silent; under moderate load (500–800W) the fans are barely audible from three feet away.”
Sources
portablepowernerd.com · thesolarlab.com · outputreport.com
EcoFlow DELTA 3000 Gen4
Nobody owns a DELTA 4 (3000) yet. EcoFlow put it on sale in the US on November 4 and says it ships in early DecemberB10. Everything on this page about it comes from EcoFlow's US spec sheet and our arithmeticB0B4.
The test I'd run first is the kitchen breaker. EcoFlow rates wall charging at 1,800 W, which is 15 A at 120 V, the whole of an ordinary 15 A circuitB4. I'd plug it into a kitchen outlet at the full rate, start the toaster on the same circuit, and see whether the breaker or the app gives first. EcoFlow's own advice for a shared circuit is to turn the charge rate down in the appB4.
“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
- 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
“At low loads (under 200W) the fans often stay completely off, making the Delta 3 effectively silent; under moderate load (500–800W) the fans are barely audible from three feet away.”
portablepowernerd.com — EcoFlow Delta 3 Tested: 2026 Hands-On Review; thesolarlab.com · 2026 · [positive]
- A2
“UPS switchover works as advertised — a power cut results in a ~10ms handoff, fast enough that routers don't reset, fridges don't skip a compressor cycle, and CPAP machines don't interrupt therapy.”
outputreport.com / thesolarlab.com — DELTA 3 line UPS testing (observed on DELTA 3 Plus, which shares the 10ms UPS spec) · 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]
- 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 if you…
- →Your nights are small. A CPAP night uses a bit over a third of its 1,024 Wh.
- →It rides in the car. 27 lb, with a car socket for a cooler.
- →Your list is still growing. It takes extra batteries, and the DELTA 4 (3000) never willB6.
- →You need power before December. It's on sale now at $629, and the DELTA 4 (3000) ships in early DecemberB10.
Buy the DELTA 3000 Gen4 if you…
- →You're buying for blackouts. It finishes our eight-hour night with 966 Wh left.
- →Your outage list has a motor in it. 3,600 W continuous and 7,200 W surge, twice the DELTA 3 on both.
- →You know 3,072 Wh is enough for good. It can't grow, so size it right once.
- →You have a 30 A twist-lock cord. It has one such outlet beside four 20 A outletsB3.
If neither fits
If a day looks like Van Life Daily at 4,685 Wh, skip both. The DELTA 4 (3000) runs 2,074 Wh short and can't expand. Look at the bigger DELTA 4 or the DELTA Pro 3, which take extra batteries.
The Bottom Line
For the night the grid goes down, I'd buy the DELTA 4 (3000). Three times the battery, twice the inverter, and it finishes the blackout the DELTA 3 only gets halfway through.
If your loads are small, the box travels, or you want to grow one battery at a time, buy the DELTA 3. It's on sale now, it's 27 lb, and it's the one of the two that can still grow.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
How much is the EcoFlow DELTA 4 (3000) in the US?
It lists at $1,699 at EcoFlow's US store, against $629 for the DELTA 3. EcoFlow says it ships in early December.
Can the DELTA 4 (3000) add an extra battery like the DELTA 3?
No. It has no extra-battery port, so 3,072 Wh is its ceiling. The DELTA 3 starts at 1,024 Wh and takes EcoFlow extra batteries.
Will the DELTA 3 get through an overnight blackout?
Not our eight-hour one on its own. That night needs 1,645 Wh and the DELTA 3 has about 870 Wh usable, so it runs 775 Wh short. The DELTA 4 (3000) finishes with 966 Wh left.
Which one charges faster from solar?
The DELTA 4 (3000) takes up to 1,000 W through one input, against 500 W on the DELTA 3. It also has three times the battery to fill, so at full rated input the DELTA 3 fills in about 2 hours and the DELTA 4 (3000) in about 3.
Can the DELTA 4 (3000) charge from a normal wall outlet?
Yes. EcoFlow rates it at up to 1,800 W from a US outlet, which is 15 A at 120 V, the full rating of an ordinary 15 A circuit. On a circuit you share with other appliances, set a lower charge rate in the EcoFlow app.
Where to buy
EcoFlow DELTA 3
$579.00
$579.00 · direct from EcoFlow
down from $629 · 8% below usual
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.