Head-to-head test
EcoFlow DELTA 3 vs EcoFlow DELTA 3 1000 Air
EcoFlow DELTA 3 vs EcoFlow DELTA 3 1000 Air: buy the DELTA 3, since the 1000 Air is no longer sold and its 500W inverter can't run the hair dryers and heaters the DELTA 3's 1,800W handles on nearly the same battery; keep an Air only if you already own one for desk duty.
Full profiles: EcoFlow DELTA 3 β
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
Spec deltas
EcoFlow has stopped selling the DELTA 3 1000 Air. It has left EcoFlow's own store, though some retailer stock may linger. Reviewers named the DELTA 3 as its closest successorB4, and our own pick for a like-for-like replacement is the DELTA 3 Classic. So this page is really for two people. One owns an Air. The other just found one on a shelf.
On paper the two look like the same box. The batteries are 64Wh apart. Then you get to the inverter, the part that turns battery power into wall power. The DELTA 3 runs 1,800W continuous. The Air stops at 500W, which rules out a hair dryer or a space heaterB3.
I'd picture the desk in my cabin in Truckee. A laptop, a monitor, the router, a lamp. The Air would carry that through an outage without complaint, because that is what it was built forB2. Then someone plugs in the kettle and the Air shuts off. The DELTA 3 has the headroom for it.
What the Numbers Reveal
Each conclusion stated first β the numbers behind it on one line, the full analysis below.
continuous output
Continuous output decides which appliances a station can run at all. Surge is the short burst a motor needs to get started, and here the Air is rated 1,000W against the DELTA 3's 3,600W. A heater, a hair dryer or a fridge compressor kicking on all sit past what the Air will giveB3.
DELTA 3: 1,024Wh capacity, 1,800W continuous / 3,600W surge outputDELTA 3 1000 Air: 960Wh capacity, 500W continuous / 1,000W surge outputDELTA 3 1000 Air won't run a space heater or hair dryer at 500WB3
Why it mattersIf anything on your list makes heat or has a motor, the Air is the wrong box for it.
An expansion battery is an extra pack that plugs into the main unit and adds capacity. On the DELTA 3, 1,024Wh is a starting point. On the Air, 960Wh is where it stays.
DELTA 3 supports EcoFlow expansion batteries; DELTA 3 1000 Air is a sealed, closed systemDELTA 3 carries a 5-year warranty against the 1000 Air's 2 yearsEcoFlow no longer sells the DELTA 3 1000 AirB4
Why it mattersIf you can picture wanting more runtime in a year or two, the DELTA 3 is the only one here with somewhere to go.
rated cycles
Multiply by the battery size and the DELTA 3 is good for about 4,096 kWh over its life against the Air's 2,880. At today's price that works out to $0.15 per lifetime kWh for the DELTA 3. The Air has no current price to run the sum on.
DELTA 3: rated for at least 4,000 cycles, about 4,096 lifetime kWhDELTA 3 1000 Air: rated for at least 3,000 cycles, about 2,880 lifetime kWhDELTA 3: $0.15 per lifetime kWh at today's price
Why it mattersA leftover Air is the shorter-lived pack with the shorter warranty, whatever the sticker says.
The specific dimensions that decide these two units β everything else is a tie.
Growth Path
Selected because: The DELTA 3 takes an expansion battery; the Air is sealed and no longer sold.
The DELTA 3 takes EcoFlow's expansion batteries. Add one later and you keep the base unit and gain runtime. The Air has no port for that, so its 960Wh is fixed for life.
That matters less on the Air than it would on a live unit, because nobody new is buying into it. If you own one, size your outage plan to what's in the box. If you're choosing today, the DELTA 3 is the one with a ceiling that can move.
What the Specs Don't Tell You
Selected because: The USB-C and expansion flags both land on the Air, and the warranty gap is the plainest difference on the page.
rated cycles
The Air's USB-C port tops out at 18W. That's a phone charger. A laptop wants several times that, and the DELTA 3's port delivers 100W, so the laptop charges straight from the station and the wall brick stays in the bag.
The warranty difference is plain. Five years on the DELTA 3, two on the Air. I'd want the longer one on anything I expected to keep through several Tahoe winters.
Lifetime Value
Selected because: Only the DELTA 3 still has a price to work from, so the Air's side of the ledger is its cycle rating and warranty.
At today's price the DELTA 3 delivers its lifetime energy at $0.15 per kWh. The Air has left EcoFlow's store and our price tracking, so there's no fair figure to set beside it.
What still compares is the hardware. The DELTA 3's battery is rated for more cycles, and at one a day that's about 11 years against 8.2. A clearance Air would have to be very cheap to make up for a shorter pack and a shorter warranty, and it would still have the smaller inverter.
Your Life, Your Pick
Selected because: Both are small boxes, and the scenarios show which everyday jobs either one can actually finish.
Four of the six jobs we model are too big for either box. Weekend camping, an eight-hour blackout and van life all need more than these hold. The two both finish, an overnight CPAP and a tailgate, are the light, short loads a station this size is built for.
The remote workday is the near miss. The DELTA 3 comes up about 40Wh short, which a shorter evening or one fewer device covers. The Air lands further back. If weekend trips or long outages are the plan, I'd look at a bigger station than either.
Strengths & trade-offs
EcoFlow DELTA 3
Strengths
- +Larger battery capacity
- +Higher AC output
- +Longer warranty
- +Rated for 4,000 charge cycles β much longer battery lifespan
Trade-offs
- βNo major technical downsides compared to rival.
EcoFlow DELTA 3 1000 Air
Strengths
- +Lighter by 5 lb
Trade-offs
- βWeaker inverter (-1,300W) limits appliance compatibility.
- βSealed capacity β the DELTA 3 can add batteries to grow past 960Wh; this one can't.
- βShorter-lived battery β rated for 3,000 charge cycles vs the DELTA 3's 4,000, so it wears out sooner.
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 Β· 2 nights Β· needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
Two nights out needs about 2,100Wh, well past what either holds. Each covers around 40% of it. Bring solar, a second charge, or a bigger battery.
Battery budget usedlower = more headroom
LOADΒ Β Phone Charger 15WΓ6h Β· LED Lights 40WΓ8h Β· Box Fan 75WΓ14h Β· CPAP Machine 40WΓ16h
SCN-02 Β· 8 hours Β· needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Neither unit
An eight-hour blackout needs about 1,645Wh. Either unit gets you about halfway on one charge, so plan how you will recharge before the lights go out.
Battery budget usedlower = more headroom
LOADΒ Β Fridge 150WΓ8h Β· Router + Modem 20WΓ8h Β· LED Lights (4 bulbs) 40WΓ6h Β· Phone Charger 15WΓ3h
SCN-03 Β· 8 hours Β· needs 320Wh
CPAP Overnight
Sleep therapy without interruption β the #1 medical use case
Either unit
A CPAP draws about 40W for eight hours, and both finish the night with more than half the battery left. The noise ratings won't separate them at that load, since both are EcoFlow's best-case figures. A new purchase here is the DELTA 3.
Battery budget usedlower = more headroom
LOADΒ Β CPAP Machine 40WΓ8h
SCN-04 Β· 8 hours Β· needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Neither unit
A full off-grid workday needs about 910Wh. The DELTA 3 falls about 40Wh short, which a shorter evening or one fewer device covers. The 1000 Air is further out.
Battery budget usedlower = more headroom
LOADΒ Β Laptop 60WΓ8h Β· External Monitor 30WΓ8h Β· Router + Modem 20WΓ8h Β· Phone Charger 15WΓ2h
SCN-05 Β· 4 hours Β· needs 670Wh
Tailgate Party
Game day power for the crew
Either unit
A tailgate afternoon fits in either with room to spare. The 1000 Air is 5 lbs lighter, but it's no longer sold, so the DELTA 3 is the one to plan around.
Battery budget usedlower = more headroom
LOADΒ Β Blender 400WΓ0.5h Β· LED TV (55") 80WΓ4h Β· Bluetooth Speaker 15WΓ4h Β· Phone Charger (Γ3) 45WΓ2h
SCN-06 Β· 24 hours Β· needs 4,685Wh
Van Life Daily
A full day of mobile living β the ultimate endurance test
Neither unit
Daily van-life draw is more than five times what either holds. That's a job for a dedicated 2kWh-plus system and a roof full of panels.
Battery budget usedlower = more headroom
LOADΒ Β Mini-Fridge 150WΓ24h Β· Laptop 60WΓ4h Β· Phone Charger 15WΓ3h Β· LED Lights 40WΓ5h Β· Fan 75WΓ8h
The Load Test
RUNTIME = (Wh Γ 0.85) Γ· 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 3 runs 4.2h vs 4h.
$629 list Β· direct from EcoFlow
Planning for more than this? Describe your whole setup and get it sizedΒ β
Modeled from the spec record β same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.ΒΉ
Essentials
The basics you need runningscale 0β58hComfort & Convenience
Makes off-grid life actually enjoyablescale 0β11.6hHigh-Draw Appliances
These reveal the real limitsscale 0β0.9hΒΉ Runtime = (capacity Γ 0.85) Γ· 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 β see methodology.
Conclusion
October 25, 2026
Verdict: the EcoFlow DELTA 3
Buy the DELTA 3. EcoFlow no longer sells the 1000 Air, and our recommended replacement for it is the DELTA 3 Classic. Between the two on this page, the batteries sit 64Wh apart. The inverters don't. The DELTA 3 runs 1,800W continuous where the Air stops at 500W, so a hair dryer or a space heater is off the Air's menu entirelyB3. The DELTA 3 also takes an expansion battery, charges a laptop at full speed over USB-C, and carries five years of warranty to the Air's two. If you already own an Air and it only keeps a router and a monitor alive, it is still doing the job it was built for.
Today the DELTA 3 is $599, $30 under its typical $629. The verdict weighs typical prices, not today's. Prices checked 28 days ago.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of October 25, 2026. The links below open EcoFlow's current price.
$599.00 Β· direct from EcoFlow
down from $629 Β· 5% below usual
Last checked 28 days ago. Prices move β check before you buy.
Written by Ian Schneider, Solar & Off-Grid Tester Β· Station Arena Test Desk Β· Updated October 25, 2026
Black Friday Β· 26 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.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): RV Living, Home Backup, Tailgating, Food Truck.
Full specifications
α΅ Derived: price Γ· rated capacity. See the data behind our comparisons β
Comparison ToolAdd more power stations, side by sideOpen Tool βHow these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it β no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews β see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity Γ 0.85 inverter efficiency) Γ· 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 βClass ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews β 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 5β . Here, DELTA 3 rates 4.5/5 (73rd percentile of 27 Everyday-class units), and DELTA 3 1000 Air rates 5.0/5 (99th percentile of 20 Compact-class units).
How the class ranking is computed βTest Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
18 Watts Charges a Phone
The 1000 Air's USB-C port caps at 18W. A phone is happy with that overnight. Most laptops want at least 60W to charge at full speed, and the DELTA 3's port delivers 100W. If a laptop is on your daily list, the Air will charge it slowly, or not at all while you're working.
Sealed, and No Longer Sold
The 1000 Air is a sealed 960Wh box with no expansion battery option, and EcoFlow has stopped selling it. Outgrow it and the next step is a whole new station. The DELTA 3 takes an extra battery instead.
Five Years Against Two
EcoFlow covers the DELTA 3 for five years and the 1000 Air for two. Nothing is hidden in the gap. It's three more years in which a fault is EcoFlow's problem rather than yours.
Battery Lifespan in Real Years
The DELTA 3 is rated for 4,000 cycles vs 3,000. In real life: at daily use, that's 11 vs 8.2 years. At weekend use (twice a week), it's 38 vs 29 years. After hitting the cycle limit, the battery doesn't die β it drops to ~80% of original capacity, which is still very usable.
Full record above β the Test Desk pick is the DELTA 3.
Check DELTA 3 price βOwnership Analysis
What happens after you buy β 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
β warranty ends Β· Reaching the cycle rating means ~80% capacity remains β degraded, not dead.
Analyst note
The DELTA 3 1000 Air is no longer sold, so there is no price to work its cost per kWh from, and this comparison doesn't quote one. On what you can actually buy today, the DELTA 3 works out at $0.15/kWh over its rated life. If you already own the DELTA 3 1000 Air, the hardware comparison still holds: over its rated life the DELTA 3 delivers about 4,096 kWh and the DELTA 3 1000 Air about 2,880 kWh.
Growth path
DELTA 3
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit β 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 3 1000 Air
FIXED CAPACITYFixed at 960Wh, with no expansion β 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.
Limited ports. You'll likely need a power strip or splitter.
Realistic full solar rechargeat 70% of rated panel output β see methodology
Analyst note
Growth only counts if you can still buy in, and the DELTA 3 1000 Air is no longer sold (EcoFlow points owners to the DELTA 3 Classic). That leaves the DELTA 3: it starts at 1,024Wh and takes EcoFlow expansion batteries, so the ceiling moves if your needs do. The DELTA 3 1000 Air's fixed 960Wh still matters if you already own one, but it isn't a reason to pick it over the DELTA 3.
What Owners Report
Patterns from published owner reports and long-term reviews β every claim cited to its source below.
EcoFlow DELTA 3
Field reports on the standard DELTA 3 are thin. Most published testing covers the bigger Plus, Max and Ultra modelsA0. What is sourced to this one is encouraging. Under light loads the fans reportedly stay off, and in the middle of the range they're barely audible from three feet awayA1.
The UPS reports come from the DELTA 3 Plus, which shares the rating, so I'd treat them as a hint about character rather than proof for this model. A UPS switchover is the handoff from wall power to battery when the grid drops. Testers saw routers and CPAP machines ride straight through it on the PlusA2. The base unit's own record is promising and still short.
βAt low loads (under 200W) the fans often stay completely off, making the Delta 3 effectively silent; under moderate load (500β800W) the fans are barely audible from three feet away.β
Sources
portablepowernerd.com Β· thesolarlab.com Β· outputreport.com
EcoFlow DELTA 3 1000 Air
The clearest thing in the Air's record is that it's gone. EcoFlow no longer sells it, and reviewers point to the DELTA 3 as its closest successorB4. While it was current, reviewers described a minimalist 22 lb box with fewer ports than its siblingsB1, built to keep a computer, monitor and router alive through an outageB2.
The same coverage is clear about the limit. At 500W continuous it won't run a space heater or a hair dryerB3. It was designed for the desk, and the desk is where it belongs.
βA 960Wh LiFePO4 unit with a 500W inverter (800W X-Boost) weighing only 22 lbs β a focused, minimalist design with fewer ports and features.β
Sources
thesolarlab.com Β· batteryskills.com Β· backuppowerhub.com Β· matanich.com
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- A focused home-office UPS unit β LFP, 10ms UPS, quiet and light β but low 500W output; now discontinued in favor of the DELTA 3. [DELTA 3 1000 Air Β· 3 entries]
- A1
βAt low loads (under 200W) the fans often stay completely off, making the Delta 3 effectively silent; under moderate load (500β800W) the fans are barely audible from three feet away.β
portablepowernerd.com β EcoFlow Delta 3 Tested: 2026 Hands-On Review; thesolarlab.com Β· 2026 Β· [positive]
- A2
βUPS switchover works as advertised β 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.β
outputreport.com / thesolarlab.com β DELTA 3 line UPS testing (observed on DELTA 3 Plus, which shares the 10ms UPS spec) Β· 2026 Β· [positive]
- B1
βA 960Wh LiFePO4 unit with a 500W inverter (800W X-Boost) weighing only 22 lbs β a focused, minimalist design with fewer ports and features.β
thesolarlab.com / batteryskills.com β DELTA 3 1000 Air review Β· 2026 Β· [mixed]
- B2
βBuilt as a power-protection device with a 10ms UPS switchover to keep a computer, monitor, and router running through outages.β
backuppowerhub.com β DELTA 3 1000 Air review Β· 2026 Β· [positive]
- B3
βWith only 500W continuous output, it won't run a space heater or hair dryer β it's built for low-to-moderate draw devices.β
backuppowerhub.com / matanich.com β DELTA 3 1000 Air review Β· 2026 Β· [mixed]
- B4
βEcoFlow no longer sells the DELTA 3 1000 Air; the closest successor is the standard DELTA 3 (1,024Wh LFP, 1,800W output, ~$549).β
backuppowerhub.com β DELTA 3 line Β· 2026 Β· [mixed]
Research compiled October 25, 2026.
Who Should Buy Which
Buy the DELTA 3 if youβ¦
- βYou need real output. A hair dryer, a space heater or a kitchen appliance is past the Air's 500W ceilingB3 and well inside the DELTA 3's 1,800W.
- βYou want room to grow. An expansion battery adds capacity later without replacing the base unit.
- βYou want a model you can still buy new, with five years of warranty behind it.
Buy the DELTA 3 1000 Air if youβ¦
- βYou already own one and it guards a desk: a laptop, a monitor, a router. That's the job it was built forB2, and nothing on this page says replace it.
- βYour heaviest load is a CPAP or a phone, and you never plan to plug in anything that heats.
- βYou're shopping for its replacement. Our recommended pick in the same size class is the DELTA 3 Classic.
If neither fits
If the job is a camping weekend, an eight-hour blackout, a full off-grid workday or van life, both of these come up short on a single charge. Look at a 2kWh-class station, or plan an expansion battery into the DELTA 3 from day one.
The Bottom Line
The Air has left EcoFlow's range, and reviewers name the DELTA 3 as its closest successorB4. The two batteries are close. The DELTA 3 pushes more than three times the continuous power, and it brings an expansion port and three more years of warranty.
If you own an Air that guards a desk, keep it there. If you're buying today, the DELTA 3 is the pick on this page.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the DELTA 3 1000 Air worth buying now that it's discontinued?
EcoFlow no longer sells it, so any new unit is leftover retailer stock. Reviewers point to the DELTA 3 as its closest successor, and our recommended replacement is the DELTA 3 Classic. If you already own an Air and your loads stay under 500W, it still does the job it was built for.
What's the real difference between the DELTA 3 and the DELTA 3 1000 Air?
Less battery than you'd think: 64Wh, 1,024Wh against 960Wh. Far more output: 1,800W continuous against 500W. The DELTA 3 also has a 100W USB-C port against 18W, takes an expansion battery, and carries three more years of warranty.
Can the DELTA 3 1000 Air run a space heater or hair dryer?
No. Its 500W continuous output can't run either. The DELTA 3's 1,800W continuous and 3,600W surge cover both, along with most compressor-driven appliances that draw a hard startup spike.
Which one is cheaper to own long-term?
The 1000 Air is no longer sold, so there's no current price to compare. At today's price the DELTA 3 works out to $0.15 per lifetime kWh. On hardware, the DELTA 3's battery is rated for 4,000 cycles against 3,000, and its warranty runs five years against two.
Does the DELTA 3 1000 Air support an expansion battery?
No. It's a sealed 960Wh unit with no expansion path. The DELTA 3 takes EcoFlow expansion batteries, so it's the one that can grow with you.
Related comparisons
Where to buy
EcoFlow DELTA 3Pick
$599.00
$599.00 Β· direct from EcoFlow
down from $629 Β· 5% below usual
Last checked 28 days ago. Prices move β check before you buy.
EcoFlow DELTA 3 1000 Air
No longer sold
Prices may vary by retailer and are subject to change.