Head-to-head test
EcoFlow DELTA 3 1000 Air vs Anker SOLIX C1000 Gen 2
The SOLIX C1000 Gen 2 pushes 2,000W and grows with expansion batteries; the DELTA 3 1000 Air pushes 500W and is a sealed, discontinued box — four times the output and a future against a cheaper unit with neither.
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 Gen 2
3,357Power Score · Appliance Class
$549.99 list · direct from Anker
Spec deltas
The SOLIX C1000 Gen 2 runs 2,000W of continuous output to the DELTA 3 1000 Air's 500W — a fourfold gap that decides this before capacity (1,024Wh vs 960Wh) or the $340 price difference matters. At 2,000W the C1000 starts a 1,500W space heater with room to spareB3; at 500W the DELTA won't start one at allA3.
The two are close only on the spec sheet's headline line. The DELTA is a discontinued, sealed 960Wh desk unit with a 500W ceiling and an 18W USB-C portA4. The C1000 Gen 2 is a current, expandable 1,024Wh station rated for 4,000 cycles, with 140W USB-C and the output to behave like a real power station rather than a UPS with a battery attached.
The DELTA keeps two honest advantages: it costs $340 less up front, and it lands a few cents lower on cost per lifetime kWh. But flip to cost per warranty-year — the horizon you'll actually reach — and the C1000 is cheaper at $130 against $155, on a 5-year policy against 2. Cheaper to buy isn't the same as cheaper to own.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
That's not a spec-sheet nuance, it's a category line — the C1000 does the appliance work a 1kWh station is bought for, while the DELTA is limited to low-draw electronics regardless of how full its battery is. The near-matching Wh number is the least important thing on the page.
SOLIX C1000 Gen 2: 2,000W continuous output, runs a 1,500W space heater with headroomB3DELTA 3 1000 Air: 500W continuous output, won't run a space heater or hair dryerA3Capacities are nearly identical: 1,024Wh vs 960Wh
Why it mattersAnyone whose backup or off-grid list includes a heater, a microwave, or a hair dryer should stop at the output row and take the C1000; the DELTA can't start those loads.
rated cycles
Expansion only counts when the thing you grow into is any good — and here it is, more LFP cells on a current platform, not a lead-acid downgrade. That makes the C1000 a unit you can still be using and upgrading in five years, while the DELTA is a closed chapter the day you buy it.
SOLIX C1000 Gen 2: accepts expansion batteries, 4,000 cyclesDELTA 3 1000 Air: sealed, no expansion, 3,000 cycles, discontinuedA4Both use LFP chemistry
Why it mattersBuyers who suspect their needs will grow — longer trips, partial home backup — should treat the expansion path as real dollar value and lean C1000; buyers certain they'll never exceed 1kWh can ignore it.
So the 'cheaper' unit depends entirely on which horizon you believe. Over the 5 years you can claim on, the C1000 is the cheaper unit to stand behind despite costing $340 more up front — because it's covered more than twice as long. The DELTA's savings are front-loaded and its warranty runs out first.
DELTA 3 1000 Air: ~$0.11 per lifetime kWh, cost per warranty-year $155, 2-year warrantySOLIX C1000 Gen 2: ~$0.16 per lifetime kWh, cost per warranty-year $130, 5-year warrantyThe DELTA costs $340 less to buy
Why it mattersValue-focused buyers should use the warranty-year figure — it favors the C1000 — unless they're genuinely planning to nurse a discontinued unit past a decade.
The specific dimensions that decide these two units — everything else is a tie.
What the Specs Don't Tell You
Selected because: The 500W-vs-2,000W output gap, the 18W USB-C cap, and the surge-headroom spread are the facts that decide fit.
rated cycles
The output row is the whole story, and the surge spec underlines it: 3,000W of surge headroom on the C1000 against 1,000W on the DELTA. Motor and compressor loads spike two to three times their running draw at startup, so that headroom is what lets the C1000 catch a fridge or pump kicking on without tripping — a load the DELTA's 500W continuous never gets near in the first place.
The USB-C gap is the daily one: 140W on the C1000 against 18W on the DELTA. That's the difference between fast-charging a laptop straight off the port and trickling a phone. The one honest catch on the C1000 is heat-management noise — reviewers report the fans stay near-silent under about 200W but ramp up audibly during fast charging or heavy outputB2. You buy the C1000 for output, and the fan is the sound of that output being delivered.
Growth Path
Selected because: Expandable-vs-sealed is a genuine long-term split, sharpened by the DELTA being discontinued.
solar input
Only the C1000 Gen 2 has a future. It accepts LFP expansion batteries on Anker's current platform, so a bigger need later doesn't mean a second full purchase — you add to what you own. The DELTA is sealed at 960Wh, and because EcoFlow discontinued itA4, it's not just closed but retired.
That expansion path is worth real money to anyone unsure how their needs will shift, and it runs through good chemistry rather than a lead-acid compromise, so what you grow into is as capable as what you started with. If you're certain 1kWh is your ceiling forever, it's a feature you'll never use — but it's the DELTA that can't offer it, not a wash.
Lifetime Value
Selected because: The DELTA's cheaper sticker and per-kWh edge need the warranty-year correction shown plainly.
cost / lifetime kWh
The DELTA looks cheaper twice: $340 less to buy, and about $0.11 per lifetime kWh against the C1000's $0.16. Both are true, and both lean on the same thing — a low sticker spread across a cycle life measured in decades.
Cost per warranty-year tells the more usable story and flips the result: $130 for the C1000 against $155 for the DELTA, over a 5-year policy versus a 2-year one. Across the years you can actually claim on, the pricier unit is the cheaper one to stand behind. The DELTA's edge is real only on a horizon most owners never reach.
Brand Trust
Selected because: A retired EcoFlow model against Anker's current, well-reviewed 2026 unit is a real ownership consideration.
Continuity favors Anker cleanly here. EcoFlow has discontinued the DELTA 3 1000 Air and moved buyers to the standard DELTA 3A4, so it's a retired unit with no out-of-warranty service. The C1000 Gen 2 is a current 2026 release widely rated among the mid-size units to beatB4, with a 5-year warranty behind it.
Neither brand's support is flawless — EcoFlow's replacement experiences run hot and cold, and Anker's SOLIX support has slipped from its once-excellent standard. But one of these units is still being sold and improved by its maker, and the other has been shelved. For a purchase you want to still service in a few years, that gap matters as much as any spec.
Strengths & trade-offs
EcoFlow DELTA 3 1000 Air
Strengths
- +Costs $241 less
- +Lighter by 2.9 lb
Trade-offs
- –Weaker inverter (-1,500W) limits appliance compatibility.
- –Sealed capacity — the SOLIX C1000 Gen 2 can add batteries to grow past 960Wh; this one can't.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the SOLIX C1000 Gen 2's 4,000, so it wears out sooner.
Anker SOLIX C1000 Gen 2
Strengths
- +Larger battery capacity
- +Higher AC output
- +Longer warranty
- +Faster solar charging
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$241) 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 run a CPAP night on about a third of their tank, so capacity isn't the tiebreak. The C1000 is quieter on paper at low load (35dB vs 39dB), which is the state a CPAP keeps it in all night.
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 clear a typical tailgate afternoon on capacity, but only the C1000's 2,000W output runs a griddle, blender, or heater without stalling. Same job on the battery gauge, a class apart on what you can plug in.
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 Gen 2 runs 4.2h vs 4h.
$549.99 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 0–58hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–11.6hHigh-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 Gen 2, on Power Score margin
The SOLIX C1000 Gen 2 is the more capable unit by a wide margin and, on the number that matters, not even the more expensive one to own. It delivers 2,000W continuous against the DELTA 3 1000 Air's 500W — enough to run a 1,500W space heater with headroomB3 where the DELTA can't start one — plus 4,000 cycles against 3,000, 140W USB-C against 18W, and an expansion path the sealed DELTA doesn't have. Its cost per warranty-year is actually lower ($130 vs $155). The DELTA's counter is a $340-cheaper sticker and a hair-lower cost per lifetime kWh, but it's a discontinued unitA4 whose 500W ceiling locks out most of what a 1kWh station is for. The honest catch on the C1000: its fans ramp up under loadB2, and it costs real money more. Pay it if you want the unit that actually does the work.
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.
$549.99 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 Gen 2 rates 4.9/5 (96th 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 vs 140W Over USB-C
The DELTA caps USB-C at 18W, a phone trickle. The C1000 delivers 140W, enough to fast-charge a laptop straight off the port with power to spare. If a laptop is your daily load, this gap is felt every session.
One Grows, One Is Sealed
The C1000 Gen 2 accepts LFP expansion batteries on Anker's current platform; the DELTA is sealed at 960Wh and, being discontinued, isn't even the current version of its own line. If there's any chance your needs grow, only one of these can follow.
3,000W Surge vs 1,000W
The C1000's 3,000W surge against the DELTA's 1,000W is the buffer that catches a fridge or pump's startup spike — briefly two to three times its running draw. It's a cleaner, stronger inverter, on top of four times the continuous output.
Two Years vs Five
The DELTA carries a 2-year warranty, the C1000 a 5-year. Despite costing $340 more, the C1000 works out to $130 per warranty-year against $155 — longer coverage and a lower yearly cost of it.
3,000 vs 4,000 Cycles
The C1000 is rated for 4,000 cycles to the DELTA's 3,000 — over a decade either way, so weight it only if you cycle daily. Paired with the expansion path, it's the unit built to stay in service longer.
Full record above — the Test Desk pick is the SOLIX C1000 Gen 2.
Check SOLIX C1000 Gen 2 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
Both units have similar long-term ownership costs ($0.11/kWh vs $0.13/kWh). The price difference is what you see on the sticker — neither is a hidden bargain or rip-off.
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
Its narrow strength is a purpose-built 10ms UPS at the lowest price in this matchup.
Worth knowing
EcoFlow has discontinued the DELTA 3 1000 Air and steers buyers to the standard DELTA 3, so there's no out-of-warranty service for this exact unit.
Anker
Ecosystem
7-8 SOLIX portable power stations across C-series (compact) and F-series (flagship), plus the X1 home energy system
Support
Anker's SOLIX support has slipped from its once-excellent standard, but the 5-year warranty is the longer safety net.
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
The C1000 Gen 2 is a current 2026 release widely rated the mid-size unit to beat, with real appliance-grade output and an expansion path.
Worth knowing
Support quality appears to be declining from its historically excellent level. Firmware updates have removed features without warning. Expansion ecosystem is smaller than EcoFlow's.
Analyst note
One unit is still being sold and improved; the other has been retired. When you're buying something you'll want serviced in a few years, that trajectory is worth as much as any single number on the spec sheet.
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 Gen 2
EXPANDABLESupports Anker 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 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 Gen 2 starts at 1,024Wh 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 blunt fact about the DELTA 3 1000 Air is that EcoFlow has already retired it, steering buyers to the standard DELTA 3 insteadA4 — so this is the discontinued, entry-level end of the line rather than its current form. It's a stripped-down 960Wh LFP unit with a 500W inverter and few portsA1, sold today mostly as leftover stock.
Within its narrow lane it does one thing well: a 10ms UPS switchover that keeps a computer, monitor, and router alive through an outageA2. But reviewers are clear that its 500W ceiling rules out space heaters, hair dryers, and other real appliancesA3 — which is exactly the ground the C1000 is built to cover.
“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 Gen 2
The C1000 Gen 2's field reputation is a refined, fast-charging update to a popular 1kWh platform, widely called the mid-size unit to beat this yearB4. Its higher output crosses a genuinely useful threshold: reviewers ran a standard 1,500W space heater on it with headroom to spareB3, a load its predecessor and the DELTA both miss.
The consistent knock is fan noise. Owners report it's nearly silent under about 200W but the fans ramp up audibly during fast charging or heavy outputB2 — the trade for the quick recharge and the higher ceiling. It's a real complaint, not a dealbreaker, and it only shows up when you're actually pushing the unit.
“Fast HyperFlash charging — a full recharge in roughly 49 minutes, noticeably quicker than the original C1000's ~58-80 minutes.”
Sources
thepowerpick.com · macrumors.com · outdoorgearlab.com · technerdo.com · mensjournal.com · powerstationadvisor.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]
- Fast charging and higher output over the original are the standout gains; fan noise under load or fast charging is the top complaint. [SOLIX C1000 Gen 2 · 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]
- B2
“Fan noise is the single most common complaint — nearly silent at low load (about 35 dB under 200W), but the fans ramp up audibly during fast charging or heavy output, reaching around 55 dB at 1,000W-plus.”
outdoorgearlab.com / technerdo.com — C1000 Gen 2 review · 2026 · [negative]
- B3
“The higher continuous output crosses a useful threshold over the original — enough to run a standard 1,500W space heater with headroom to spare.”
thepowerpick.com / mensjournal.com — C1000 Gen 2 review · 2026 · [positive]
- B4
“Reviewers describe it as a refined, powerful, fast-charging update to a popular 1kWh platform, widely rated the mid-size unit to beat in 2026.”
thepowerpick.com / powerstationadvisor.com — C1000 Gen 2 review · 2026 · [positive]
Research compiled July 16, 2026.
Who Should Buy Which
Buy the DELTA 3 1000 Air if you…
Buy the SOLIX C1000 Gen 2 if you…
- →You need real output — a space heater, microwave, or hair dryer the DELTA's 500W can't startB3.
- →You want a unit that can grow later and stay covered for 5 years, and you'll fast-charge a laptop off its 140W USB-C.
If neither fits
If your target is a two-night camping trip (about 2,100Wh) or an 8-hour whole-home blackout (about 1,645Wh), both fall short of finishing either — this is the 1kWh class. The C1000's expansion path is the nearest fix; if you need that capacity out of the box, step up to a 2kWh-plus unit instead of choosing between these two.
The Bottom Line
Buy the SOLIX C1000 Gen 2. It quadruples the DELTA's output to 2,000W — the line between running a space heater and notB3 — adds 1,000 more cycles and an expansion path, and still comes in cheaper per warranty-year at $130 against $155. It behaves like a power station; the DELTA behaves like a UPS.
The honest catch is real: the C1000 costs $340 more up front and its fans get audible under loadB2. The DELTA answers with a lower price and a slightly better per-kWh figure, but it's a sealed, discontinued unit whose 500W ceiling locks out most of what people buy a 1kWh station to doA4. Pay the premium for the one that does the work.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the SOLIX C1000 Gen 2 worth $340 more than the DELTA 3 1000 Air?
For most buyers, yes. You get 2,000W of output against 500W — the difference between running a space heater and not — plus 4,000 cycles against 3,000, 140W USB-C against 18W, and an expansion path. It's also cheaper per warranty-year ($130 vs $155). The DELTA only wins if 500W genuinely covers you and the lower sticker is the priority.
Can the DELTA 3 1000 Air run a space heater or microwave?
No. At 500W continuous it sits below a 1,500W heater, a standard microwave, and a hair dryer, none of which will start. The C1000 Gen 2 runs a 1,500W heater with headroom to spare. If any heating or high-draw appliance is on your list, that's the deciding line.
How loud does the C1000 Gen 2 get?
Quiet at low load and audibly louder under strain. Owners report it's near-silent under about 200W but the fans ramp up during fast charging or heavy output. It's the trade for its quick recharge and high output — a real but manageable complaint, and one you only hear when you're pushing it.
Which one can I expand later?
Only the C1000 Gen 2. It accepts Anker LFP expansion batteries, so you can add capacity without buying a whole new unit. The DELTA 3 1000 Air is sealed at 960Wh and discontinued, so what you buy is what you keep for good.
Isn't the DELTA cheaper to own?
Only on the lifetime-kWh line ($0.11 vs $0.16), which spreads its low price over decades of cycling few owners reach. On cost per warranty-year — the term you can actually claim on — the C1000 is cheaper at $130 against $155, with more than double the coverage. Cheaper to buy, not cheaper to own.
Where to buy
EcoFlow DELTA 3 1000 Air
$309.00
$309.00 list · direct from EcoFlow
Anker SOLIX C1000 Gen 2Pick
$549.99
$549.99 list · direct from Anker
Prices may vary by retailer and are subject to change.