Head-to-head test
EcoFlow DELTA 2 vs Anker SOLIX C2000 Gen 2
Per watt-hour these two cost exactly the same, so price isn't the argument: the only question is whether your worst day fits inside 870 usable watt-hours or needs 1,741.
Full profiles: EcoFlow DELTA 2 → · Anker SOLIX C2000 Gen 2 →
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
$499.00 · direct from EcoFlow
Last checked 58 days ago. Prices move — check before you buy.
$999.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
$499 divided by 1,024Wh and $1,000 divided by 2,048Wh both land on $0.49 per watt-hour. The DELTA 2 and the SOLIX C2000 Gen 2 charge the identical rate for stored electricity; the Anker just sells you twice as much of it. So this was never a value comparison, whatever the price tags suggest.
What it is instead is a sizing decision, and the line falls in an awkward place. After inverter losses the DELTA 2 has about 870Wh to give and the C2000 Gen 2 about 1,741Wh. A CPAP night (320Wh) and a tailgate (670Wh) fit comfortably inside the smaller one. A full remote workday (910Wh) misses it by 40Wh. An eight-hour blackout (1,645Wh) misses it by 775Wh, which is not a gap you manage with discipline.
Take the C2000 Gen 2 if there's an outage anywhere in your reasoning. Take the DELTA 2 if there isn't, keep the $501, and enjoy the 14.7 lbs you don't have to carry. Both of those are defensible buys. Only one of them keeps the fridge going until the lights come back.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
rated cycles
Run it out over the cells instead of over the checkout and the smaller unit is the pricier one. 3,000 cycles on 1.024kWh is 3,072 kWh of energy for $499; 4,000 cycles on 2.048kWh is 8,192 kWh for $1,000. Sixteen cents a kilowatt-hour against twelve. The DELTA 2 is not a bargain and the Anker is not a premium; they're the same product at two sizes, and the Anker's cells simply amortize better.
DELTA 2: $499 for 1,024WhSOLIX C2000 Gen 2: $1,000 for 2,048WhDELTA 2: 3,000 cycles; C2000 Gen 2: 4,000 cycles
Why it mattersAnyone weighing these on dollars per watt-hour should stop counting and start listing loads, because the spreadsheet is a dead heat.
A 40Wh miss you can engineer around by skipping a phone top-up. A 775Wh miss you can't, and that's the blackout: 1,645Wh needed against 870Wh in the box. The DELTA 2 sits on the wrong side of a line it can almost touch, and the failure mode changes character as the load list grows. Nudge past a kilowatt-hour once and you're rationing; nudge past it twice and you're in the dark. The Anker covers the same night using 94% of what it has, which is close but on the correct side of close.
DELTA 2 usable capacity: 870Wh (1,024Wh derated for inverter losses)Remote Workday needs 910Wh8-Hour Blackout needs 1,645Wh; C2000 Gen 2 usable is 1,741Wh
Why it mattersIf your worst-case day stays under roughly 800Wh, buy the DELTA 2 and stop reading. If it ever crosses a kilowatt-hour, the smaller unit will ask you to manage it and the bigger one won't.
That reframes the 20 dBA gap. It doesn't fire at the bedside, where the DELTA 2 clears a CPAP night at 37% of its usable capacity in near-silence; it fires when you're recharging at 1,200W in the room you're sitting in, which reviewers compare to a gaming laptopA2. The Anker is still the quieter box and still the safer pick for a light sleeper. It just isn't quieter in the way most people picture when they read 30 dBA against 50.
DELTA 2 rated 50 dBA; C2000 Gen 2 rated 30 dBAReviewers report the DELTA 2's fans trigger above 120W and run 48-55 dB at 1,500-1,800WA1CPAP Overnight is about 40W for eight hours, 320Wh total
Why it mattersThe CPAP buyer whose only real load is the machine itself can take the DELTA 2 and keep the $501; the person who'll be fast-charging indoors should pay for the Anker.
weight
So the carry cases collapse into a straight weight comparison, and 14.7 lbs is not a footnote. 27 lbs comes out of a trunk one-handed and over a tailgate without ceremony; 41.7 lbs is a set-your-feet, put-it-down-once lift. You pay that difference on every single outing, while the capacity advantage that justified it only pays out on the loads you'd be doing at home anyway.
DELTA 2: 27 lbs; C2000 Gen 2: 41.7 lbsWeekend Camping needs 2,100Wh; neither unit covers it (DELTA 2 gets 41%, C2000 Gen 2 gets 83%)Tailgate Party needs 670Wh; both units cover it
Why it mattersCampers and tailgaters should buy the DELTA 2 on portability alone, because the loads it can't cover are loads the Anker can't cover either.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: Two of the six loads we model separate these units outright: the DELTA 2's 870Wh usable covers a tailgate and a CPAP night, but not the 1,645Wh blackout or the 910Wh workday.
Two of these six aren't wins for anybody. Weekend camping asks for 2,100Wh and van life for 4,685Wh; the Anker gets through 83% and 37% of them, the DELTA 2 through 41% and 19%. Neither is a whole-trip battery for either job. If that's your use, the answer is a bigger station or an expansion battery bolted onto one of these, not the larger of the two base units.
The four that do resolve break the same direction, and only two of them break decisively. Both units cover a CPAP night and both cover a tailgate outright; the Anker simply finishes with more in reserve, and reserve you never draw on isn't a feature you bought. The blackout and the workday are the real ones. That's the stretch where 870Wh stops and 1,741Wh keeps going, and it's the only stretch where the extra $501 buys you capability instead of comfort.
Lifetime Value
Selected because: Both units cost $0.49 per watt-hour at the till ($499 divided by 1,024Wh, $1,000 divided by 2,048Wh), so the only value gap opens up over the life of the cells: $0.16 per lifetime kWh against $0.12.
cost / lifetime kWh
Buying the DELTA 2 saves $501 today and costs four cents more per kilowatt-hour for the rest of its working life. That's 3,072 kWh of total energy from 3,000 cycles on a 1.024kWh pack, against 8,192 kWh from 4,000 cycles on a 2.048kWh one. Sixteen cents against twelve, and after you've read that once you don't need it again.
Neither figure should decide anything by itself, because almost nobody drains one of these daily. Cycled every weekend the DELTA 2 has 28.8 years in it and the Anker 38.5, which are both fictional numbers next to a five-year warranty and a product category that reinvents itself every eighteen months. Read the lifetime cost as proof the Anker isn't an extravagance, not as the reason to buy one.
Portability & Form Factor
Selected because: 14.7 lbs separates them, and weight is the single axis where the cheaper unit is also the better one.
weight
One of these comes out of the trunk in one hand. 27 lbs you carry the way you'd carry a full toolbox; 41.7 lbs is two hands and a plan, and 14.7 lbs is exactly the sort of difference that reads as nothing in a spec table and registers as something on the third trip from the car.
The sting for the Anker is that the trips where weight matters are the trips where its capacity matters least. Game day needs 670Wh and both units clear it with room. A camping weekend needs 2,100Wh and neither does. Weight is the one axis where the DELTA 2 is straightforwardly the better product, and it's the axis that shows up every time you use it rather than only on the bad nights.
What the Specs Don't Tell You
Selected because: Three of the four cards below are formalities, starting with warranties that are identical at five years each; only the noise gap changes a decision.
rated cycles
Three of the four cards here are formalities. The warranties are identical, five years each, same terms, and the only reason a warranty comparison renders at all is that the prices differ enough to make the per-year figure look different. Cycle life reads 4,000 against 3,000, which sounds like a gap and behaves like a footnote, since both packs outlast their warranty coverage many times over under any realistic use. Switchover is 10ms against 20ms, and a desktop, a router and a modem all ride through either.
The noise card is the one with actual teeth, and it's narrower than 50 dBA against 30 dBA looks. The DELTA 2's fan is driven by load, spinning up above roughly 120W and running 48-55 dB when the unit is working hardA1, which means the noise arrives during fast charging and heavy draws rather than while a phone trickles overnight. In a garage or a basement it's irrelevant. In the room where you sleep, with real load going through it, it's the one card on this page that should move money.
Strengths & trade-offs
EcoFlow DELTA 2
Strengths
- +Costs $501 less
- +Lighter by 14.7 lb
Trade-offs
- –Weaker inverter (-600W) limits appliance compatibility.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the SOLIX C2000 Gen 2's 4,000, so it wears out sooner.
Anker SOLIX C2000 Gen 2
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$501) than the DELTA 2.
- –Significantly heavier (+14.7 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
Neither unit
Neither unit covers this scenario's 2,100Wh: the DELTA 2 comes up 1,230Wh short (about 41% covered), the SOLIX C2000 Gen 2 359Wh (83%). Treat this as partial cover — enough for the essentials in it, not the whole list.
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
SOLIX C2000 Gen 2
This is the scenario that separates them. The night needs 1,645Wh; the DELTA 2 has 870Wh usable and finishes 775Wh short, while the C2000 Gen 2 covers it using 94% of what it has. Both inverters can start every load on the list, so this isn't about power, it's about how long the tank holds out. If the outage is why you're shopping, the argument ends here.
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
SOLIX C2000 Gen 2
A CPAP draws about 40W, so eight hours is 320Wh and both of these clear it several times over. The percentages are a formality. What's left is the box beside your pillow, and the Anker takes that on the rating: 30 dBA against 50. Worth knowing that the DELTA 2's 50 dBA is its figure under load, and a 40W CPAP is close to the lightest load you can hand it, so this is a reason to prefer the Anker rather than a reason to spend $501 on one.
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
SOLIX C2000 Gen 2
The DELTA 2 misses this by 40Wh. It needs 910Wh and has 870Wh usable, a rounding error that shows up at four in the afternoon rather than at nine in the morning. Skip a phone top-up or an hour of the fan and it finishes the day. The C2000 Gen 2 finishes it at 52% and never raises the question. Five days a week, the difference isn't 40Wh, it's whether your workday includes arithmetic.
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
SOLIX C2000 Gen 2
Both cover game day. The Anker does it at 38% of its usable capacity and the DELTA 2 at 77%, which is the difference between comfortable and comfortable. Reserve you never touch is worth nothing in a parking lot. The 14.7 lbs you carry from the car is worth something, and that one goes the other way.
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 2 comes up 3,815Wh short (about 19% covered), the SOLIX C2000 Gen 2 2,944Wh (37%). 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: SOLIX C2000 Gen 2 runs 8.5h vs 4.2h.
$999.99 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 0–116.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–23.2hHigh-Draw Appliances
These reveal the real limitsscale 0–1.7h¹ 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
August 9, 2026
Verdict: the SOLIX C2000 Gen 2, on Power Score margin
The SOLIX C2000 Gen 2 wins because it's the only one of the two that finishes an eight-hour blackout. That night needs 1,645Wh; the Anker has 1,741Wh usable after inverter losses and the DELTA 2 has 870Wh, so it stops 775Wh short. The Anker also delivers cheaper energy over its life ($0.12 per lifetime kWh against $0.16, from 4,000 cycles on a 2.048kWh pack versus 3,000 on a 1.024kWh one), takes 800W of solar to the DELTA 2's 500W, and is rated 30 dBA against 50. Confidence stops at 7 because the DELTA 2 gives up nothing on rate, and it wins the two things a spec table undersells: it's $501 cheaper and 14.7 lbs lighter. If your worst day lives under 800Wh, the Anker's extra capacity is headroom you'll never touch.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of August 9, 2026. The links below open EcoFlow's and Anker's current prices.
$999.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
or check the DELTA 2 price$499.00 list
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated August 9, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
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 2 rates 4.1/5 (46th percentile of 27 Everyday-class units), and SOLIX C2000 Gen 2 rates 4.1/5 (48th percentile of 26 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.
50 dBA Is the Loaded Figure, Not the Idle One
The DELTA 2 is rated 50 dBA under load against the C2000 Gen 2's 30 dBA, and that gap is real when the unit is working, which means fast charging or a heavy draw rather than a phone trickling overnight. It's the wrong unit for the room you sleep in and a complete non-issue in a garage. Before you let this card move money, work out where the thing will actually live.
10ms vs 20ms: Both Are Fast Enough
The C2000 Gen 2 switches over in 10ms and the DELTA 2 in 20ms. A desktop, a router and a modem ride through either without noticing. This is a genuine spec win for the Anker and a non-event for nearly everything you'd plug in. If you own gear that trips at 20ms, you already know it, and you should be looking at a dedicated online UPS rather than at either of these.
Identical Terms, Different Price Tags
Five years each. Same length, same coverage, nothing here to compare. This card only renders because the two units cost different amounts, which makes the per-year figure differ ($100 a year against $200) without any difference in what you're actually protected against. Read it as a note about price, not about warranty.
Both Outlive Their Warranties by Decades
4,000 cycles against 3,000 sounds like a gap and behaves like a formality. Cycled every weekend that's 38.5 years for the C2000 Gen 2 and 28.8 for the DELTA 2, against five-year warranties on both. Even a full cycle every single day puts them at 11 years and 8.2. Whatever ends your ownership of either of these, it won't be the cells.
Full record above — the Test Desk pick is the SOLIX C2000 Gen 2.
Check SOLIX C2000 Gen 2 price →or check the DELTA 2 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 2 is cheaper to buy, but the SOLIX C2000 Gen 2 is cheaper to own. At $0.12/kWh over its lifetime vs $0.16/kWh, the SOLIX C2000 Gen 2's higher cycle life and capacity make each dollar go further over the years.
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
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. At the very top of the range, the DELTA Pro Ultra platform stacks batteries and inverters into whole-home backup — a flagship path, not a line-wide feature.
Worth knowing
EcoFlow runs the deepest catalog in portable power, 12-15 models plus panels and smart home hardware, which matters less for this purchase than for the next one: the expansion path keeps going long after this unit. Support is the polarized part of the record, with prepaid-label replacements for some owners and long waits or refurbished units for others. Buying through a retailer with its own returns desk is cheap insurance.
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
Parent brand trust from Anker's consumer electronics dominance. InfiniPower technology for long cycle life. Strong $/Wh value in the mid-size and larger units — the S2000, F2600 and C1000 are among the better buys per watt-hour in the catalog.
Worth knowing
Anker brings consumer-electronics brand trust and a much smaller power-station lineup behind it, seven or eight SOLIX stations against EcoFlow's dozen-plus. The thing to watch is direction rather than level: SOLIX support quality is trending down from a historically excellent baseline, and firmware updates have removed features without warning.
Analyst note
Neither brand should decide this one. EcoFlow gives you a larger ecosystem to grow into and support that's a coin flip; Anker gives you a stronger parent-brand record and support that's sliding from a high starting point. If you expect to keep adding to the system, EcoFlow's catalog is the safer long bet. If you expect to buy one box and forget about it, treat this column as noise and go back to the load list.
Growth path
DELTA 2
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.
SOLIX C2000 Gen 2
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 2,048Wh.
Accepts up to 800W 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
Both expand, but the SOLIX C2000 Gen 2's higher solar ceiling (800W vs 500W) gives it the stronger off-grid growth path — more panels can feed a bigger bank as it grows.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 2
The DELTA 2 has been out long enough for multi-month field data, and it says the same thing every time: good unit, loud fan. Reviewers report the fans trigger above 120W and run 48-55 dB at 1,500-1,800W, to the point where powering medical equipment above 120W in a bedroom becomes a choice between the noise and an extension cable out the doorA1. At 1,200W charging it's been likened to a gaming laptop, though the app lets you throttle the charge rate to quiet it downA2.
Everything else in the record is positive. Eighteen months of testing across outages, camping trips and daily home-office use came back strong on fast charging, LiFePO4 reliability and expandabilityA3. EcoFlow has said it intends to address the fan behavior in firmware, as it has on other models after launchA4. Treat that as a stated plan rather than a feature you can buy today.
“When charging at 1200W the fans sound like a gaming laptop, though you can lower the charging speed in the app to silence it.”
Sources
portablepowerlab.com
Anker SOLIX C2000 Gen 2
The C2000 Gen 2's record is strong but shallow: consistent hands-on review coverage with very few criticisms, and no long-term owner reports yetB2B4. What exists comes from reviewers rather than people three winters into ownership, so weight it accordingly. The recurring theme is how little the thing asks of you, described as turn it on, plug in, go, with no firmware wrangling and no odd voltage behaviorB2, plus app monitoring over Bluetooth or Wi-Fi that reviewers found genuinely usefulB3.
On noise, reviewers describe the fans as a subdued whirr that only occasionally reaches around 35 dB at a metre under high loadB1, which sits a little above the 30 dBA on its spec sheet and well below anything the DELTA 2 does when working. One note if you're cross-shopping the original C2000: the Gen 2 dropped a substantial amount of weight versus its predecessor, which is why 41.7 lbs is respectable for 2,048Wh rather than merely heavyB5.
“Even at full power it's far quieter than any other powerful Anker station tested — the fans never rise above a subdued, easily-backgrounded whirr, working largely silently and only occasionally reaching a pleasantly quiet ~35 dB at 1 m under high load.”
Sources
notebookcheck.net · thesolarlab.com · trustedreviews.com · androidguys.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
- Fan noise under moderate-to-high load is the dominant, repeatedly-cited complaint; the fan spins up above ~120W. [DELTA 2 · 3 entries]
- Reviewers consistently praise quiet operation, fast charging, premium build, and no-fuss plug-and-play simplicity. [SOLIX C2000 Gen 2 · 3 entries]
- A1
“Fans trigger at anything above 120 watts; at maximum load (1,500–1,800W) they run continuously at ~48–55 dB. Powering medical equipment above 120W in a bedroom means listening to the fans or running an extension cable out of the room.”
portablepowerlab.com — EcoFlow Delta 2 Review: 6 Months of Real Use; PCWorld — EcoFlow Delta 2 review · 2026 · [negative]
- A2
“When charging at 1200W the fans sound like a gaming laptop, though you can lower the charging speed in the app to silence it.”
PCWorld — EcoFlow Delta 2 power station review · 2026 · [mixed]
- A3
“After 18 months of real-world testing through multiple power outages, camping trips, and daily home-office use, the unit earned recognition for fast charging, reliable LiFePO4 battery chemistry, and expandability.”
portablepowerlab.com — EcoFlow Delta 2 Review: 6 Months of Real Use · 2026 · [positive]
- A4
“EcoFlow officials indicated they plan to address the fan noise in an upcoming firmware update, as they have for other models after release.”
portablepowerlab.com — EcoFlow Delta 2 Review · 2026 (dated claim — may be partially addressed) · [mixed]
- B1
“Even at full power it's far quieter than any other powerful Anker station tested — the fans never rise above a subdued, easily-backgrounded whirr, working largely silently and only occasionally reaching a pleasantly quiet ~35 dB at 1 m under high load.”
notebookcheck.net / thesolarlab.com — Anker SOLIX C2000 Gen 2 review · 2026 · [positive]
- B2
“Really simple to use — no need to download firmware or deal with weird voltage drops; you just turn it on, plug in, and go. Rapid charging and premium build.”
trustedreviews.com / thesolarlab.com — Anker SOLIX C2000 Gen 2 review · 2026 · [positive]
- B3
“The Anker Solix app is a good way to monitor the station during charging and use over Bluetooth or Wi-Fi; reviewers appreciated the monitoring functionality.”
androidguys.com — Anker SOLIX C2000 Gen 2 review · 2026 · [positive]
- B4
“Delivers a convincing performance with few points of criticism — undoubtedly one of the most attractive 2 kWh power stations on the market.”
notebookcheck.net — Anker SOLIX C2000 Gen 2 review · 2026 · [positive]
- B5
“Substantially lighter than its predecessor — the Gen 2 shed a large amount of weight versus the original C2000, making it notably easier to carry for its capacity.”
notebookcheck.net — '11.6 kg lighter than its predecessor' review · 2026 · [positive]
Research compiled August 9, 2026.
What Owners Actually Report
Drawn from 163 comments on independent review channels — not from retailer reviews, which skew to the first week of ownership. Each line is our summary of one commenter's claim, linked to the original. We record what they said, including where it contradicts the spec sheet.
EcoFlow DELTA 2
224 claims from 155 comments · 178 from owners · 60 with figures
- Runtime
- 32 · 13% negative
- Price & value
- 38 · 4% negative
- Charging
- 17 · 23% negative
- Durability
- 22 · 67% negative
- Warranty & support
- 22 · 59% negative
What owners complain about
Ignores solar unless he unplugs it from the wall, so he switched to the AC180.
Solar inputowner63 agreedsource →
His Delta 2 went bad three months after purchase and EcoFlow agreed it was defective.
Durabilityownerafter 3 months236 agreedsource →
Past 30 days the five-year warranty only gets a refurbished unit covered for 30 days.
Warranty & supportowner236 agreedsource →
What owners praise
DELTA 2 plus extra battery and 600W solar cost ~$1200 and paid for itself in under 2 years in California.
Price & valuemeasuredowner736 agreedsource →
Batteries still hold 98%+ capacity, ahead of the 80%-at-10-years warranty curve.
Durabilitymeasuredowner736 agreedsource →
Gets 180-190W into it from a 100Ah LiFePO4 via XT60i cable, no converter needed.
Chargingmeasuredowner106 agreedsource →
Anker SOLIX C2000 Gen 2
15 claims from 8 comments · 11 from owners · 4 with figures
- Expandability
- 2 · 0% negative
- Size & weight
- 1 · 0% negative
- Price & value
- 3 · 0% negative
- Idle drain
- 2 · 0% negative
- App & firmware
- 1 · 0% negative
What owners complain about
Says the 800W max claim is limited by a 60V, 17A window, so real peak input is well under the rating.
Solar input2 agreedsource →
What owners praise
Claims are weighted by how specific they are, whether the commenter owns the unit, and how many readers agreed. Comments that mention a product under a rival's review count for more, because the commenter had no reason to be there. This is what buyers report, not our test results — for measurements we ran ourselves, see the methodology.
Who Should Buy Which
Buy the DELTA 2 if you…
- →Your worst day is a laptop, a router, phone charges and some lights, and it lands under about 800Wh. The DELTA 2 covers that with margin and leaves $501 in your pocket for panels.
- →You carry it more than you plug it in. 27 lbs against 41.7 lbs is the difference between grabbing it and hefting it, and on the trips where you're carrying it, the Anker's extra capacity mostly sits unused.
- →Game day is the use case. A tailgate needs 670Wh, which the DELTA 2 handles at 77% of its usable capacity, and nobody in a parking lot has ever been grateful for reserve they didn't draw.
Buy the SOLIX C2000 Gen 2 if you…
- →The outage is why you're shopping. An eight-hour blackout needs 1,645Wh; the Anker covers it at 94% of its usable capacity and the DELTA 2 finishes 775Wh short. That's the whole purchase decision in one line.
- →You work off it five days a week. A full remote workday needs 910Wh, 40Wh past what the DELTA 2 has to give, while the Anker does it at 52% and never makes you count.
- →It lives indoors and it works hard. 30 dBA against 50, 800W of solar input against 500W, and a 2,400W inverter with 4,000W of surge against 1,800W and 2,700W, all of which matter more in a house than in a campsite.
If neither fits
If your real requirement is a camping weekend (2,100Wh) or van life (4,685Wh), close this tab. Neither box covers either job, and buying the Anker because it's the bigger of two units that both fall short is how people end up owning a station they resent. Go up a size class, or plan from the start on a base unit plus an expansion battery, which both of these support.
The Bottom Line
Take the C2000 Gen 2 if an outage is anywhere in your reasoning. The eight-hour night wants 1,645Wh, the Anker has 1,741Wh usable and the DELTA 2 has 870Wh. That isn't a shortfall you manage with discipline, it's half a night missing. Everything else stacked on the Anker's side, the 800W solar ceiling, the 30 dBA rating, the twelve cents per lifetime kilowatt-hour, is confirmation of a decision the blackout already made.
Take the DELTA 2 if the outage isn't in it. You give up nothing on rate, the watt-hours cost the same either way, and you keep $501 and 14.7 lbs. That makes it the smaller purchase rather than the worse one, which is a distinction these two make unusually easy to see. Buy the size of your worst day, not the size of your budget.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Anker SOLIX C2000 Gen 2 worth twice the price of the EcoFlow DELTA 2?
It's twice the price for twice the battery, so per watt-hour it's a wash: $499 divided by 1,024Wh and $1,000 divided by 2,048Wh both come to $0.49. The extra $501 buys capability only if your loads actually cross what the DELTA 2 can deliver. Under about 800Wh a day, you're paying for capacity that never gets used.
Can the EcoFlow DELTA 2 get me through an 8-hour power outage?
Not the one we model, which needs 1,645Wh. The DELTA 2 has about 870Wh usable after inverter losses, so it comes up 775Wh short. Its 1,800W inverter and 2,700W surge can start every load in that scenario without complaint; it just runs out of battery well before the lights come back. The C2000 Gen 2 finishes the same night using 94% of its 1,741Wh.
Which one is quieter for a bedroom or CPAP?
The Anker, rated 30 dBA against the DELTA 2's 50 dBA. But both cover a CPAP night many times over (320Wh at about 40W for eight hours), and the DELTA 2's fan is load-driven, with reviewers putting the trigger above roughly 120W. A CPAP sits well below that. Buy the Anker for quiet if you'll also be fast-charging indoors, not just for the machine itself.
How long will each one actually last?
The DELTA 2 is rated 3,000 cycles and the C2000 Gen 2 4,000, which works out to 3,072 kWh and 8,192 kWh of total energy delivered, or $0.16 and $0.12 per lifetime kWh at their prices. Both carry identical five-year warranties. Cycled every weekend, that's 28.8 years and 38.5 years respectively, so cell life is not the thing that will end your ownership.
Can I add more capacity to either one later?
Both accept expansion batteries, so neither one traps you at its base capacity. The Anker is the better foundation for a growing off-grid setup because it takes 800W of solar against the DELTA 2's 500W, so a bigger bank has a bigger pipe to refill through. If you already know you'll expand, that solar ceiling matters more than the 1,024Wh you'd save buying in at the lower price.
Where to buy
EcoFlow DELTA 2
$499.00
$499.00 · direct from EcoFlow
Last checked 58 days ago. Prices move — check before you buy.
Anker SOLIX C2000 Gen 2Pick
$999.99
$999.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.