Head-to-head test
EcoFlow DELTA 3 1000 Air vs Anker SOLIX C1000
The DELTA 3 Air outputs 500W and its USB-C tops out at 18W — the SOLIX C1000 runs 1,800W and charges a laptop at 100W, so this is a specialist desktop-UPS against a general-purpose power station.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
EcoFlow
DELTA 3 1000 Air
3,014Power Score · Appliance Class
$309.00 list · direct from EcoFlow
Anker
SOLIX C1000
3,269Power Score · Appliance Class
$449.00 list · direct from Anker
Spec deltas
The EcoFlow DELTA 3 1000 Air outputs 500W; the Anker SOLIX C1000 outputs 1,800W. That's not a small gap between similar units — it's the difference between a specialist and a generalist. The Air is a minimalist desktop UPS built to protect a computer and router through outages, and its own reviewers note it won't run a space heater or hair dryerA3. The C1000 runs the full household appliance list short of central AC.
The gap repeats at the USB-C port: the Air maxes at 18W, the C1000 at 100W. Eighteen watts trickle-charges a phone; it won't fast-charge the laptop the Air is otherwise built to protect. The C1000's 100W port refuels a laptop at full speed.
The Air isn't trying to be the C1000, and priced $240 lower it shouldn't be judged as a failed one. It's lighter (22 vs 28.4 lbs), switches over faster (10ms line-interactive vs 20ms standby), and costs less per lifetime kWh. If your load is a desk and nothing more, it's the cleaner fit. The moment your needs leave the desk, the C1000 is the only one of the two that follows.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
A 500W inverter covers a laptop, monitor, router, and phone comfortably, but a 1,500W space heater, a microwave, or a hair dryer draws two to three times that continuously — so the Air simply won't attempt them, while the C1000's 1,800W runs all three.
the DELTA 3 Air outputs 500W continuous; the C1000 outputs 1,800W continuousreviewers note the Air won't run a space heater or hair dryer, being built for low-to-moderate draw devicesA3
Why it mattersIf there's any chance you'll want to run a real appliance during an outage, the Air rules itself out before price matters — this is a desk-protection device, not a home-backup unit.
That means the very laptop the Air is protecting can't be fast-charged from its USB-C port; you'd need the AC outlet and the laptop's own brick, where the C1000's 100W USB-C charges it directly at full speed with no adapter.
the DELTA 3 Air's USB-C port maxes at 18W; the C1000's USB-C delivers up to 100Wthe Air is built as a UPS to keep a computer and router running through outagesA2
Why it mattersA desk user who wants one cable to both protect and fast-charge a laptop is better served by the C1000's 100W port, even at the desk the Air was built for.
The lifetime-kWh figure amortizes over 3,000 cycles, a horizon a light desk user may take a decade to reach, while the warranty-year number reflects the coverage you actually hold — and there the Air's 2-year term makes it costlier per protected year than the C1000's 5.
the DELTA 3 Air carries a 2-year warranty and costs $155 per warranty-year; the C1000 carries a 5-year warranty and costs $110 per warranty-yearthe Air's cost per lifetime kWh is $0.11 against the C1000's $0.17
Why it mattersWeigh the warranty-year cost, not the lifetime-kWh number, unless you genuinely expect to cycle the Air hard for a decade — for most desk users the C1000's longer coverage is the more relevant value.
The specific dimensions that decide these two units — everything else is a tie.
PowerScore Breakdown
Selected because: 500W vs 1,800W output is the whole specialist-vs-generalist axis.
overall power score
The output number reframes everything: 500W against 1,800W. The DELTA 3 Air is built as a power-protection device — a UPS to keep a computer, monitor, and router alive through a cutA2 — and its inverter is sized for exactly that, nothing heavier. Its own reviewers are blunt that it won't run a space heater or hair dryerA3.
The C1000's 1,800W is a different job entirely, covering the household appliance list short of central AC. So this isn't a case of one unit being a weaker version of the other; they're built for different rooms. The question is whether your needs stay at the desk or move into the kitchen.
What the Specs Don't Tell You
Selected because: USB-C at 18W, no expansion, UPS switchover, and warranty term all fire here.
Three of the Air's limits fire at once. Its USB-C maxes at 18W, too little to fast-charge the laptop it's protecting, where the C1000 delivers 100W. It's sealed with no expansion path, so 960Wh is the ceiling for good. And it carries a 2-year warranty against the C1000's 5. Individually minor; together they mark it clearly as a light-duty specialist.
The Air does win one gotcha outright: UPS switchover. It's line-interactive at under 10ms against the C1000's standby mode under 20ms — the faster, more robust transfer for a desktop or NAS that a 20ms cut might blink. For a buyer whose whole reason is protecting a sensitive computer, that's a real point in the Air's favor. Worth knowing separately: EcoFlow no longer sells the Air, with the standard DELTA 3 as its successorA4.
Lifetime Value
Selected because: The two ownership-cost measures disagree; the reader needs the honest split.
cost / lifetime kWh
The two cost measures pull apart, and which one you trust changes the answer. The Air is cheaper per lifetime kWh, $0.11 against $0.17, but that figure amortizes over 3,000 cycles — a horizon a light desk user might take a decade of daily outages to reach. Per warranty-year, the more relevant number, the Air costs $155 against the C1000's $110, because its coverage runs two years to the C1000's five.
So the Air's headline value edge is real only on paper long past most buyers' horizon. On the coverage you actually hold, the C1000 is the cheaper unit per protected year, and it's the larger battery besides — 1,056Wh against 960Wh.
Portability & Form Factor
Selected because: The Air is lighter (22 vs 28.4 lbs), a real edge for a desk unit that gets tucked away.
weight
At 22 lbs the Air is 6.4 lbs lighter than the 28.4-lb C1000 — a genuine edge for a unit that lives under a desk and occasionally gets tucked into a closet or carried to a second room. It's the lightest thing on this page, and for a stationary desk-UPS role that suits it.
But portability is a quieter virtue for a device you mostly set down once. The C1000's extra weight comes with far more output and capacity, so the Air's lightness only really counts for the buyer who genuinely just wants a small, quiet box that sits on the floor and does one job.
Strengths & trade-offs
EcoFlow DELTA 3 1000 Air
Strengths
- +Costs $140 less
- +Lighter by 6.4 lb
Trade-offs
- –Weaker inverter (-1,300W) limits appliance compatibility.
- –Sealed capacity — the SOLIX C1000 can add batteries to grow past 960Wh; this one can't.
Anker SOLIX C1000
Strengths
- +Larger battery capacity
- +Higher AC output
- +Longer warranty
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$140) than the DELTA 3 1000 Air.
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
Neither unit
Neither unit can fully handle this scenario (needs 2,100Wh). You'd need a higher-capacity station or to cut back on usage.
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
Neither unit
Neither unit can fully handle this scenario (needs 1,645Wh). You'd need a higher-capacity station or to cut back on usage.
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 units clear an overnight CPAP run with room to spare — this is a true tie on capacity. Break it on the two things that differ: the Air's faster 10ms switchover and lighter weight against the C1000's longer warranty and headroom to do more the next day.
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
Neither unit
Neither unit can fully handle this scenario (needs 910Wh). You'd need a higher-capacity station or to cut back on usage.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
Either unit
Both cover a 670Wh afternoon, but only on paper equally — the C1000's 1,800W actually runs a blender, a warming plate, or a pump, where the Air's 500W caps you at lights, speakers, and charging. Same scenario win, very different real-world ceiling.
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 can fully handle this scenario (needs 4,685Wh). You'd need a higher-capacity station or to cut back on usage.
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 six 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: SOLIX C1000 runs 4.4h vs 4h.
$449 list · direct from Anker
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 0–59.8hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–12hHigh-Draw Appliances
These reveal the real limitsscale 0–0.9h¹ 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
July 16, 2026
Verdict: the SOLIX C1000, on Power Score margin
For $240 more, the C1000 is a genuinely more capable machine and the safer general-purpose buy: 1,800W output against the DELTA 3 Air's 500W, a 100W USB-C port against its 18W, a 5-year warranty against 2, and an expansion path the Air doesn't have. The DELTA 3 Air is a focused device — a quiet, 22-lb desktop UPS with a fast 10ms line-interactive switchover, built to keep a computer, monitor, and router alive through outages on low-draw loads. If that's your entire use case, its lower price, lighter weight, faster switchover, and $0.11-per-kWh lifetime cost make it the right tool. But its 500W ceiling won't run a hair dryer or space heater, its 18W USB-C won't fast-charge a laptop, and it's already discontinued. For anyone whose needs might grow past a desk, the C1000 is the buy.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 16, 2026. The links below open EcoFlow's and Anker's current prices.
$449.00 list · direct from Anker
or check the DELTA 3 1000 Air price$309.00 list
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated July 16, 2026
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, Food Truck.
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 1000 Air rates 5.0/5 (99th percentile of 19 Compact-class units), and SOLIX C1000 rates 4.5/5 (70th percentile of 24 Everyday-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.
18W USB-C Won't Fast-Charge a Laptop
The DELTA 3 Air's USB-C tops out at 18W — fine for a phone, short of the 60 to 100W a laptop needs to charge at speed. The C1000's port delivers 100W. On a unit built to protect a desk, that's a real limit at the exact task it's designed around.
The Air Is Sealed at 960Wh
The DELTA 3 Air has no expansion path — 960Wh is the ceiling for good. The C1000 accepts add-on batteries, so it can grow past 1,056Wh later. For a fixed desk-UPS role the sealed design is fine; if your needs might grow, it's a hard stop.
Surge Power: Inverter Quality Indicator
The DELTA 3 1000 Air has a 2× surge-to-continuous ratio vs the SOLIX C1000's 1.3×. A higher ratio (≥2×) means the inverter handles motor startup surges better. That's critical for fridges, AC compressors, and power tools that briefly draw 2-3× their rated wattage. The SOLIX C1000 may trip when starting these appliances even though its continuous wattage looks sufficient.
The Air's Switchover Is Genuinely Faster
This is the Air's clean win: line-interactive under 10ms against the C1000's standby mode under 20ms. For a sensitive desktop or NAS that a slower transfer might blink, the faster, more robust switchover is a real reason to pick the Air for pure power protection.
2 Years vs 5 — and a Discontinued Unit
The Air carries a 2-year warranty to the C1000's 5, which makes it costlier per protected year despite the lower lifetime-kWh figure. It's also discontinued, so factor in that you're buying into a unit with no successor support path.
SOLIX C1000: Noise Level Not Disclosed
The DELTA 3 1000 Air publishes its noise level (39dB), but the SOLIX C1000 doesn't. Brands that don't disclose noise specs often have louder units. If noise matters to you (CPAP users, apartment dwellers), this is worth investigating before buying.
Full record above — the Test Desk pick is the SOLIX C1000.
Check SOLIX C1000 price →or check the DELTA 3 1000 Air 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 1000 Air wins on both sticker price and long-term value. At $0.11/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Brand trust
EcoFlow
Ecosystem
Largest in portable power — 12-15 models across DELTA Pro, DELTA 3, and RIVER 3 series, plus solar panels and smart home panels
Support
US-based phone/email/chat support (1-800-368-8604). Experiences are polarized — many report hassle-free prepaid-label replacements, but others report long waits and refurbished units sent for new claims. Pro tip: buying from Costco or Amazon gives you a stronger return safety net.
Community
Largest community in the space — Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
EcoFlow runs the deepest ecosystem in portable power and the fastest-charging technology in the category, with the most active innovation cadence — the DELTA 3 line it's steering buyers toward is a direct example.
Worth knowing
Support experiences are polarized, and EcoFlow offers no parts or service out of warranty. The Air specifically is discontinued, so buying it now means no successor support path. An October 2025 DELTA Max 2000 recall is also worth noting for the broader line.
Anker
Ecosystem
7-8 SOLIX portable power stations across C-series (compact) and F-series (flagship), plus the X1 home energy system
Support
US-based support. Historically known for incredible no-hassle replacements, but recent reports describe AI-driven support agents giving generic responses and complex return logistics for heavy units (hazmat shipping). The Anker brand reputation is still strong, but SOLIX-specific support quality is trending down.
Community
Moderate — active Reddit (r/Anker, r/AnkerSOLIXCommunity) and growing. Benefits from Anker's massive consumer electronics brand awareness.
App experience
Rated 4.5/5 iOS (~1,100 ratings) · 4.3/5 Android
Unique strength
Anker's SOLIX line leans on the parent brand's consumer-electronics reputation and delivers strong dollar-per-Wh value, with a 5-year warranty and an expansion path the Air lacks.
Worth knowing
Support has reportedly slipped from Anker's historically excellent standard, with recent reports of generic AI-driven responses and complex return logistics for heavier units.
Analyst note
EcoFlow's ecosystem depth is real, but it's actively moving on from the Air toward the standard DELTA 3 — buying the discontinued unit puts you a step behind that curve. Anker's C1000 is a current model with longer coverage and room to grow. Both brands' direct support draws mixed reports, so the practical tiebreaker is that the C1000 has a future and the Air doesn't.
Growth path
DELTA 3 1000 Air
FIXED CAPACITYFixed at 960Wh, 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.
SOLIX C1000
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 1,056Wh.
Accepts up to 600W of solar. Suitable for a 1-2 panel setup.
Generous port selection supports complex multi-device setups.
Expansion batteries are Anker-specific. You're investing in the Anker ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
The DELTA 3 1000 Air is sealed at 960Wh, which is fine if that covers you. The SOLIX C1000 starts at 1,056Wh and can grow beyond it with Anker expansion batteries — real headroom the DELTA 3 1000 Air doesn't have if your needs climb toward partial-home backup.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 1000 Air
The DELTA 3 Air is best understood as a focused home-office UPS, and its coverage says so plainly. It's a 960Wh LFP unit with a 500W inverter (800W via X-Boost) weighing only 22 lbs — a deliberately minimalist design with fewer ports and features than a full stationA1, built around a 10ms UPS switchover to keep a computer, monitor, and router running through outagesA2.
The consistent caveat is the output ceiling: with only 500W continuous it won't run a space heater or hair dryer, and it's meant for low-to-moderate draw devicesA3. It's also been discontinued — EcoFlow's closest current replacement is the standard DELTA 3, a 1,800W unit much closer to the C1000's classA4.
“A 960Wh LiFePO4 unit with a 500W inverter (800W X-Boost) weighing only 22 lbs — a focused, minimalist design with fewer ports and features.”
Sources
thesolarlab.com · batteryskills.com · backuppowerhub.com · matanich.com
Anker SOLIX C1000
The C1000's field reputation is built on being the versatile one: reviewers say it handles virtually any household appliance short of central AC or an electric dryer, which is exactly what the DELTA 3 Air can't claimB4. They credit it with nailing the fundamentals too — fast AC recharge, strong short-burst inverter performance, and a useful monitoring appB3.
The long-term data holds up: one reviewer ran a unit over a year with minimal battery degradation and rode out seven brief outages in a 30-day home-office UPS test without a shutdownB2. The one recurring knock is fan noise under fast charging or heavy load, comparable to a desktop fan, though it stays near-silent under light drawB1.
“One reviewer used their unit for over a year with zero issues and minimal battery degradation — about 97% of original capacity. In a 30-day home-office UPS test it handled 7 brief outages with no equipment shutdowns or data loss.”
Sources
outdoorgearlab.com · lifenhancer.com · rvoutfitting.com · outdoortechlab.com · wattsontheroof.com · technerdo.com · teqclub.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 — LFP, 10ms UPS, quiet and light — but low 500W output; now discontinued in favor of the DELTA 3. [DELTA 3 1000 Air · 3 entries]
- Fan noise under fast charging or heavy load is the consistent knock; otherwise strong reliability, fast recharge, and practical size earn broad praise. [SOLIX C1000 · 3 entries]
- A1
“A 960Wh LiFePO4 unit with a 500W inverter (800W X-Boost) weighing only 22 lbs — a focused, minimalist design with fewer ports and features.”
thesolarlab.com / batteryskills.com — DELTA 3 1000 Air review · 2026 · [mixed]
- A2
“Built as a power-protection device with a 10ms UPS switchover to keep a computer, monitor, and router running through outages.”
backuppowerhub.com — DELTA 3 1000 Air review · 2026 · [positive]
- A3
“With only 500W continuous output, it won't run a space heater or hair dryer — it's built for low-to-moderate draw devices.”
backuppowerhub.com / matanich.com — DELTA 3 1000 Air review · 2026 · [mixed]
- A4
“EcoFlow no longer sells the DELTA 3 1000 Air; the closest successor is the standard DELTA 3 (1,024Wh LFP, 1,800W output, ~$549).”
backuppowerhub.com — DELTA 3 line · 2026 · [mixed]
- B1
“Fan noise is the single most common complaint — the fans spin up audibly during fast charging or heavy output near the unit's limit, comparable to a desktop computer fan at speed. Under light loads (below ~500W) it's nearly silent.”
outdoorgearlab.com / lifenhancer.com — Anker SOLIX C1000 review · 2026 · [negative]
- B2
“One reviewer used their unit for over a year with zero issues and minimal battery degradation — about 97% of original capacity. In a 30-day home-office UPS test it handled 7 brief outages with no equipment shutdowns or data loss.”
rvoutfitting.com / outdoortechlab.com — Anker SOLIX C1000 long-term notes · 2026 · [positive]
- B3
“Nails the fundamentals: fast AC recharge, strong inverter performance for short bursts, practical size and weight for a 1kWh unit, and genuinely useful app monitoring.”
wattsontheroof.com / technerdo.com — Anker SOLIX C1000 review · 2026 · [positive]
- B4
“Handles virtually any household appliance except central AC and electric dryers; a popular 'sweet spot' 1kWh unit for RV and home backup.”
rvoutfitting.com / teqclub.com — Anker SOLIX C1000 review · 2026 · [positive]
Research compiled July 16, 2026.
Who Should Buy Which
Buy the DELTA 3 1000 Air if you…
Buy the SOLIX C1000 if you…
- →You want one unit that protects the desk and also runs real appliances — a microwave, a coffee maker, a space heater on low — where 1,800W is the differenceB4.
- →You want the longer 5-year warranty, a 100W USB-C that fast-charges a laptop, and an expansion path if your needs grow past 1,056Wh.
If neither fits
If your real job is a two-night camp (about 2,100Wh) or an 8-hour multi-appliance blackout (about 1,645Wh), neither the Air's 960Wh nor the C1000's 1,056Wh covers it on one charge. Step up to a 2,000Wh-plus unit rather than choosing between these two.
The Bottom Line
The DELTA 3 Air is a good tool for one narrow job: a quiet, 22-lb desktop UPS with a fast 10ms switchover that keeps a computer, monitor, and router alive through outages, for $240 less than the C1000. If your load never leaves the desk, its price, weight, and switchover speed are the right trade.
But its 500W output won't run a real appliance, its 18W USB-C won't fast-charge a laptop, its warranty is half the C1000's, and it's already discontinued. The C1000 does everything the Air does and then runs the kitchen too, with a 100W laptop port, a 5-year warranty, and room to expand. For anyone whose needs might outgrow a desk, that's the buy.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Can the EcoFlow DELTA 3 Air run a space heater or hair dryer?
No — at 500W continuous output it won't run either, and its own reviewers say as much. It's built for low-to-moderate draw devices like a computer, monitor, and router. If you need to run a real appliance, the C1000's 1,800W is the reason to pay $240 more.
Why does the DELTA 3 Air's USB-C only do 18W?
It's a minimalist, low-power design — the Air is built as a desk UPS, not a fast-charging hub. The practical catch is that 18W won't fast-charge a laptop, which needs 60 to 100W, while the C1000's USB-C delivers a full 100W. Even at the desk it's built for, that limits the Air.
Is the DELTA 3 Air cheaper to own than the C1000?
It depends which measure you use. Per lifetime kWh it's cheaper ($0.11 vs $0.17), but that amortizes over 3,000 cycles you may take a decade to reach. Per warranty-year — the coverage you actually hold — the Air is costlier at $155 against $110, because its warranty runs two years to the C1000's five.
Which has the faster UPS switchover?
The Air, and it's a real edge. It's line-interactive at under 10ms against the C1000's standby mode under 20ms — the more robust transfer for a sensitive desktop or NAS. If protecting a specific computer through momentary cuts is your whole use case, that faster switchover is the Air's strongest argument.
Is the DELTA 3 Air still sold?
No — EcoFlow has discontinued it, and the closest current replacement is the standard DELTA 3, a 1,800W unit much nearer the C1000's class. That's worth weighing: buying the Air now means buying into a unit with no successor support path, where the C1000 remains a current model.
Where to buy
EcoFlow DELTA 3 1000 Air
$309.00
$309.00 list · direct from EcoFlow
Anker SOLIX C1000Pick
$449.00
$449.00 list · direct from Anker
Prices may vary by retailer and are subject to change.