Head-to-head test
EcoFlow DELTA 2 vs Anker SOLIX C1000 Gen 2
The C1000 Gen 2 out-specs the DELTA 2 on nearly everything that matters — quieter, longer-lived, more output, faster — for $170 more, leaving the DELTA 2 as the budget pick if you can live with its louder fan.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
EcoFlow
DELTA 2
3,128Power Score · Appliance Class
$499.00 list · direct from EcoFlow
Anker
SOLIX C1000 Gen 2
3,357Power Score · Appliance Class
$549.99 list · direct from Anker
Spec deltas
This is a newer, quieter unit against a cheaper, older one. The Anker SOLIX C1000 Gen 2 and the EcoFlow DELTA 2 hold the same 1,024Wh and share the same expandable design, but almost everywhere else the Anker pulls ahead — for $170 more, at $649 to the DELTA 2's $479.
The gap that matters most is noise. The DELTA 2 is rated 50dB and its fan is the complaint owners raise most, spinning up above just 120 wattsA1. The C1000 Gen 2 sits at 35dB and stays near-silent until real load arrivesB2. For a unit that runs in your living room or bedroom, that's the difference between forgetting it's on and being reminded of it.
The Anker piles on from there: a 4,000-cycle battery to the DELTA 2's 3,000, 2,000W of output to 1,800, a lighter 24.9-lb body, 600W of solar to 500, a faster 49-minute rechargeB1, and a quicker UPS cutover. The DELTA 2's answer is price — $170 less for the same capacity, and a proven 18-month track recordA3. A real saving, but the only column it wins.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
The DELTA 2's fan triggers above 120 watts and runs 48-55dB under load — the flaw owners cite mostA1 — while the C1000 Gen 2 stays quiet until real load arrivesB2, so the Anker fixes the exact weakness that most defines the DELTA 2.
the DELTA 2 is rated 50dB with its fan its top complaintA1the C1000 Gen 2 is rated 35dB and quiet until past ~1,000WB2both are used indoors for CPAP, home office, and backup
Why it mattersAnyone running the unit in living space overnight should weigh the Anker's quiet heavily against the DELTA 2's saving.
rated cycles
The C1000 Gen 2's extra 1,000 cycles spread its higher price over a third more lifetime energy, landing both units at $0.16 per lifetime kWh — so the DELTA 2's $170 saving is a genuine upfront discount, not a long-term value win.
the C1000 Gen 2 is rated 4,000 cycles vs the DELTA 2's 3,000both cost the same to own ($0.16 per lifetime kWh)the DELTA 2 is $170 cheaper upfront ($479 vs $649)
Why it mattersBudget buyers get real money back today with the DELTA 2; long-term value is a wash.
continuous output
The C1000 Gen 2 sustains 200W more, refills in about 49 minutesB1, and hands off to battery in under 10ms — line-interactive UPS territory — while the DELTA 2's 20ms cutover sits a tier back, so the Anker is the sturdier choice for high-draw gear and sensitive electronics alike.
the C1000 Gen 2 outputs 2,000W and recharges in ~49 minutesB1the DELTA 2 outputs 1,800W with a 20ms UPS switchoverthe C1000 Gen 2 switches over in under 10ms
Why it mattersFor running bigger appliances or protecting a desktop PC, the C1000 Gen 2 is the safer inverter.
The specific dimensions that decide these two units — everything else is a tie.
What the Specs Don't Tell You
Selected because: Noise, cycle life, output, and UPS speed all favor the C1000 Gen 2.
rated cycles
Nearly every spec-level tiebreaker points at the Anker. It's rated 35dB to the DELTA 2's 50, lasts 4,000 cycles to 3,000, sustains 2,000W to 1,800, takes 600W of solar to 500, and switches over in under 10ms to the DELTA 2's 20. The DELTA 2 doesn't lead a single one of these lines.
The noise gap is the one that reshapes daily life. The DELTA 2's fan is its defining complaint — loud above 120WA1 — while the C1000 Gen 2 stays quiet until heavy loadB2. For a unit that lives in your home, that's not a spec-sheet footnote; it's whether you notice the thing running at 2 a.m.
Lifetime Value
Selected because: Identical cost-to-own makes the $170 price gap the DELTA 2's whole case.
cost / lifetime kWh
Here's where the DELTA 2 makes its stand — and it's a fair one. Both units land at $0.16 per lifetime kWh, because the C1000 Gen 2's extra 1,000 cycles offset its $170-higher price almost exactly. Over the full life of the unit, they're equally economical.
But upfront, $170 is $170. The DELTA 2 delivers the same 1,024Wh for meaningfully less cash today, on a platform with an 18-month reliability record behind itA3. If your budget is tight and the Anker's refinements don't move you, the DELTA 2 is the cheaper way to the same capacity.
Portability & Form Factor
Selected because: The C1000 Gen 2 is 2.1 lbs lighter — a small edge on top of the rest.
weight
The C1000 Gen 2 is the lighter unit at 24.9 pounds to the DELTA 2's 27 — a modest 2.1-pound edge. It won't decide the matchup, but for a unit that moves between rooms or rides to a campsite, lighter is always the friendlier choice.
It's one more small tally in the Anker's column, alongside the quieter fan, longer battery, and faster charging. Individually minor; together they're why the C1000 Gen 2 is the better unit, and why the DELTA 2's case rests almost entirely on its price.
Brand Trust
Selected because: The DELTA 2's proven record versus the C1000 Gen 2's newer refinement.
The DELTA 2's strength here is maturity: 18 months of testing through outages, camping, and daily use, with a reliable LFP battery the standoutA3. EcoFlow's app is also excellent (4.6/5). It's a known, proven quantity — its main sin is the fan.
The C1000 Gen 2 is the newer, more refined unit on a nearly-as-good app (4.5/5), reviewers' pick as the mid-size one to beatB4, though Anker's SOLIX support has slipped from its once-excellent standard. Both are trustworthy on hardware — the choice is the DELTA 2's price and record versus the Anker's across-the-board polish.
Strengths & trade-offs
EcoFlow DELTA 2
Strengths
- +Costs $51 less
Trade-offs
- –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
- +Lighter by 2.1 lb
- +Higher AC output
- +Faster solar charging
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –No major technical downsides compared to rival.
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 covers a fridge-plus-lights blackout for a full eight hours alone — both hold 1,024Wh, short of the load. Both expand to get closer, but the C1000 Gen 2 recharges faster mid-outage (49-minute wall charge, more solar) and starts more with its higher sustained output. For outage planning, the Anker has the edge; for a tight budget, the DELTA 2 still covers a partial outage for $170 less.
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's ~320Wh night three times over, so capacity is a non-issue — this is entirely about the fan 18 inches from your head. The C1000 Gen 2 stays quiet at a CPAP's low draw; the DELTA 2's fan can wake up above 120 watts and run at 48-55dB. For overnight medical use, the Anker's quiet is worth real money, and this is the scenario where it shows most.
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
A laptop-monitor-router day lands near 910Wh, at the usable edge of both 1,024Wh units — a tie on runtime, since they carry identical capacity. The tiebreaks favor the Anker: its 140W USB-C port fast-charges the laptop, and its quieter operation makes it the better all-day desk companion, where the DELTA 2's fan is the one you'd notice by mid-afternoon.
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 handle game day easily. Since capacity isn't the deciding factor, consider weight: the lighter unit is easier to load into a truck bed. Also check if either has Bluetooth speaker-level noise. Fan sound matters in social settings.
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
Dead heat — both run this 205W load for roughly 4.2h. Pick on price, weight, or ports.
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 13, 2026
Verdict: the SOLIX C1000 Gen 2, on Power Score margin
The Anker SOLIX C1000 Gen 2 is the better unit and worth its $170 premium for most buyers. For $649 to the DELTA 2's $479 it runs much quieter (35dB vs 50, and the DELTA 2's fan is its most-cited flaw), lasts longer (4,000 cycles vs 3,000), sustains more output (2,000W vs 1,800), surges higher, weighs less, takes more solar, charges faster, and switches over quicker for UPS duty. Cost-to-own is identical at $0.16 per lifetime kWh, so the C1000 Gen 2's extra cycles fully absorb its higher price over time. The DELTA 2's one real advantage is that $170 saving, on the same 1,024Wh capacity — which keeps it a legitimate budget pick, just not the better machine.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 13, 2026. The links below open EcoFlow's and Anker's current prices.
$549.99 list · direct from Anker
or check the DELTA 2 price$499.00 list
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated July 13, 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 4.0/5 (39th percentile of 24 Everyday-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.
50dB versus 35dB — the DELTA 2's defining flaw
The DELTA 2 is rated 50dB and its fan is the complaint owners raise most, spinning up above just 120 watts. The C1000 Gen 2 sits at 35dB and stays near-silent until real load arrives. That 15-decibel gap is the difference between a unit you forget is on and one you're aware of — decisive if it runs beside a CPAP or in your living room. You can slow the DELTA 2's charge to quiet it, but at load it's the louder machine, full stop.
Under 10ms versus 20ms — a tier apart for sensitive gear
The C1000 Gen 2 switches to battery in under 10ms, fast enough for line-interactive UPS protection; the DELTA 2 takes about 20ms, a tier back in standby territory. For most appliances the difference is invisible, but for a desktop PC or NAS that can trip on a longer interruption, the Anker is the safer bet to ride through an outage without a reboot — one more edge on top of the quiet and the longer battery.
4,000 cycles versus 3,000 — why the pricier unit costs the same to own
The C1000 Gen 2's battery is rated for 4,000 charge cycles to the DELTA 2's 3,000 — a third more full charges before either fades. That extra life is exactly why both units land at $0.16 per lifetime kWh despite the $170 price difference: the Anker spreads its cost over more energy. Most buyers won't reach 3,000 cycles, so this matters most to heavy daily users, but it's the reason the Anker's premium isn't a long-term penalty.
Full record above — the Test Desk pick is the SOLIX C1000 Gen 2.
Check SOLIX C1000 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 C1000 Gen 2 is cheaper to own. At $0.13/kWh over its lifetime vs $0.16/kWh, the SOLIX C1000 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. Supports up to 180kWh modular expansion with DELTA Pro Ultra X.
Worth knowing
The Oct 2025 DELTA Max 2000 recall (overheating/fire risk, 6 incidents) is worth noting. Also tested subscription paywalls for advanced app features in early 2025 before community backlash paused the plan. No parts or service offered out of warranty.
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
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
Both brands rate near the top, so this is a spec-and-price call. EcoFlow brings the deepest ecosystem and the best-rated app (4.6/5), and the DELTA 2 has an 18-month reliability record that makes it a known quantity. Anker's app is nearly as good (4.5/5) and the C1000 Gen 2 is the more refined, newer machine reviewers crown the mid-size one to beat, though its SOLIX support has slipped from its once-excellent standard. Both are trustworthy on hardware — buy from a retailer with an easy return window, and let the Anker's quieter, faster, longer-lived package or the DELTA 2's $170 saving, not the badge, decide.
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 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
Both expand, so neither locks you out of growth — decide on capacity, price, and the rest, not the expansion checkbox.
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 earns its trust the proven way: 18 months of testing through multiple outages, camping trips, and daily home-office use, with fast charging and a reliable LFP battery its standout marksA3. It's a known, dependable 1kWh platform.
Its defining knock is noise. The fan triggers above roughly 120 watts and runs 48-55dB under load — the complaint owners raise mostA1 — though you can quiet it by lowering the charge speed in the appA2, and EcoFlow has said a firmware fix is comingA4. A solid unit whose main compromise is acoustic.
“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 C1000 Gen 2
The C1000 Gen 2 is widely rated the mid-size unit to beat in 2026 — a refined, powerful, fast-charging update to a popular platformB4 — with HyperFlash recharging in about 49 minutesB1 and enough output to run a 1,500W space heater with headroomB3.
It shares the category's one common trait: fan noise that's near-silent under 200W but climbs to around 55dB during fast charging or heavy outputB2. Crucially, it stays quiet at the light loads where the DELTA 2's fan is already spinning — the practical noise win goes to the Anker.
“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
- Fan noise under moderate-to-high load is the dominant, repeatedly-cited complaint; the fan spins up above ~120W. [DELTA 2 · 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
“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
“Fast HyperFlash charging — a full recharge in roughly 49 minutes, noticeably quicker than the original C1000's ~58-80 minutes.”
thepowerpick.com / macrumors.com — Anker SOLIX C1000 Gen 2 review · 2026 · [positive]
- 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 13, 2026.
Who Should Buy Which
Buy the DELTA 2 if you…
Buy the SOLIX C1000 Gen 2 if you…
If neither fits
Both cap near 1,024Wh, so neither covers a full 8-hour blackout alone, though both expand. If you need whole-outage runtime, look at a 1.5-2kWh unit — and if silence is critical, note that even the quieter C1000 Gen 2 gets loud under heavy load.
The Bottom Line
The C1000 Gen 2 is the better unit and worth its premium for most people: quieter (35dB vs 50), longer-lived (4,000 cycles vs 3,000), with more output, more solar, faster charging, and a lighter body — all for $170 more, with the same cost-to-ownB4. The noise fix alone settles it for anyone who runs the unit where they live.
The DELTA 2 keeps one genuine card: $170 less for the same 1,024Wh, on an 18-month-proven platformA3. If budget leads and you'll manage or tolerate the fan, it's a legitimate, capable buy. For everyone else, the Anker's across-the-board polish is worth the money — the DELTA 2 wins the price and loses the machine.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
EcoFlow DELTA 2 vs Anker SOLIX C1000 Gen 2 — which should I buy?
The C1000 Gen 2 for most buyers: it's much quieter (35dB vs 50), lasts longer (4,000 cycles vs 3,000), outputs more (2,000W vs 1,800), charges faster, and weighs less — for $170 more, with identical cost-to-own. Choose the DELTA 2 if budget is the priority: it holds the same 1,024Wh for $170 less and is a proven platform, provided you can live with its louder fan.
Is the DELTA 2 too loud?
Its fan is its most-cited flaw — rated 50dB, it spins up above just 120 watts and runs 48-55dB under load. You can quiet it by lowering the charge speed in the app, but at typical loads it's audibly louder than the C1000 Gen 2, which stays near-silent until past 1,000W. For bedroom or living-room use, that noise gap is the DELTA 2's biggest drawback.
Is the C1000 Gen 2 worth $170 more?
For most buyers, yes — you get a quieter fan, a longer 4,000-cycle battery, more output and solar, faster charging, and a lighter body, all real day-to-day improvements. Their cost-to-own is identical, so you're paying for refinement, not just longevity. Save the $170 with the DELTA 2 only if budget rules the decision and its fan noise doesn't bother you.
Do both expand?
Yes — both the DELTA 2 and the C1000 Gen 2 accept an add-on battery to grow beyond their 1,024Wh base, so neither locks you in at the starting capacity. Expandability is a shared strength, not a reason to choose one over the other. The decision comes down to the Anker's quieter, longer-lived, faster package versus the DELTA 2's lower price.
Where to buy
EcoFlow DELTA 2
$499.00
$499.00 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.