Head-to-head test
EcoFlow DELTA Pro vs Anker SOLIX C2000 Gen 2
The $1,899 box sells energy at 44 cents a watt-hour and the $1,000 box at 49, so neither one is the bargain here; you're deciding whether 3,600Wh is worth living with 99 lbs instead of 41.7.
Full profiles: EcoFlow DELTA Pro → · Anker SOLIX C2000 Gen 2 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
$1,899.00 · direct from EcoFlow
Last checked 1 day 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
Forty-four cents a watt-hour against forty-nine. The DELTA Pro is the more expensive unit at $1,899 and simultaneously the cheaper one per unit of stored energy, which means the SOLIX C2000 Gen 2's $1,000 sticker isn't buying you a better deal. It's buying you a smaller battery.
Over the full rated life they converge anyway: $0.13 per lifetime kilowatt-hour for the DELTA Pro against $0.12 for the Anker, because 4,000 cycles beat 3,500. Both carry 5 years of warranty. If you came here to work out which one is the better value, the answer is that neither is, and you can stop.
What's left is physical. 3,600Wh in a 99-lb chassis against 2,048Wh in a 41.7-lb one, and everything that follows from that: 1,600W of solar input against 800W, 7,200W of surge against 4,000W, a 60dB fan rating against 30dB. Work out how the box gets from where it's stored to where it's used and the rest of this page mostly answers itself.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
rated cycles
Add the identical 5-year warranty and there is no financial argument left on this page. The difference between $1,899 and $1,000 isn't a premium you're paying or a saving you're banking. It's what 3,600Wh costs instead of 2,048Wh, at close enough to the same rate that the spreadsheet can't break the tie.
DELTA Pro: $1,899 for 3,600Wh, listed at 44 cents per watt-hourSOLIX C2000 Gen 2: $1,000 for 2,048Wh, listed at 49 cents per watt-hourRated life: 3,500 cycles for the DELTA Pro, 4,000 for the SOLIX, giving 12,600 kWh and 8,192 kWh respectivelyBoth units carry a 5-year warranty
Why it mattersAnyone shortlisting these two on value should close the spreadsheet and go measure the space, and the stairs, between where the unit will live and where it will work.
weight
So the DELTA Pro's camping win comes with a surface condition attached. Roll it off a tailgate onto a paved pad and 99 lbs stops being your problem; put a curb, a soft verge, or a gravel slope between the car and the tent and it becomes a two-person liftA2. The Anker never has that conversation. It just ends the weekend 359Wh early.
Weekend Camping models a 2,100Wh weekendSOLIX C2000 Gen 2 usable: 1,741Wh, which is 359Wh short of that weekendDELTA Pro usable: 3,060Wh, finishing the same weekend with 960Wh in handDELTA Pro weighs 99 lbs; the SOLIX weighs 41.7 lbsThe DELTA Pro line moves on integrated wheels and a telescoping handle, but they work on flat, smooth surfaces and want a cart on uneven groundA2
Why it mattersCar campers on made sites should take the DELTA Pro. If your site is anywhere you wouldn't wheel a suitcase, take the Anker and build the weekend around 1,741Wh.
solar input
That inverts the usual logic on day two of an outage. The small unit is the one that has to be refilled every single day, because one 8-hour night already put it at 94%, and it's also the slower of the two at doing it. The DELTA Pro walks out of the same night at 54% and can be full again before lunch. The asterisk is that 1,600W of input only helps if you've bought 1,600W of panel, which is a separate line on the invoice.
DELTA Pro: 3,600Wh capacity, 1,600W maximum solar inputSOLIX C2000 Gen 2: 2,048Wh capacity, 800W maximum solar inputThe 8-Hour Blackout model leaves the SOLIX at 94% used with 96Wh of its 1,741Wh usable left; the DELTA Pro finishes at 54%
Why it mattersIf you're buying for storm season rather than for weekends, read the solar input row before the capacity row. It points the same direction and it decides more.
And the noise ratings say less than they look like they do, because 60dB and 30dB are both load figures and a CPAP is not a loadA4. What actually decides it is furniture: one of these is a 41.7-lb box that sits on a nightstand and the other is 99 lbs that doesn't come upstairs. The 10ms versus 20ms transfer is a difference a CPAP will never detect, which is the point. Nothing about this job needs the bigger unit.
CPAP Overnight models 320Wh, which is 18% of the SOLIX's 1,741Wh usable and 10% of the DELTA Pro's 3,060WhSOLIX C2000 Gen 2 transfers to battery in 10ms; DELTA Pro in 20msDELTA Pro: 99 lbs, rated 60dB under load. SOLIX C2000 Gen 2: 41.7 lbs, rated 30dBTesting of the DELTA Pro line finds the fan whine arrives under heavy draw and the unit is quiet enough at light loadsA4
Why it mattersIf the main overnight duty is one medical device, buy the Anker without agonising. If it's the only duty, buy something smaller than either of these.
The specific dimensions that decide these two units — everything else is a tie.
Runtime: Will It Power Your Gear?
Selected because: 3,060Wh usable against 1,741Wh, after the same flat derate, is what settles four of the six scenarios below.
continuous output
Both numbers here have already had 85% taken off the nameplate before anything else happens: 3,600Wh becomes 3,060Wh usable, 2,048Wh becomes 1,741Wh. It's a flat house rule applied to every unit we score rather than a measurement of either inverter, so read it as a consistent haircut, not a finding about these two.
1,741Wh clears four of the six scenarios and 3,060Wh clears five, with Van Life Daily at 4,685Wh out of reach for both. What matters is which two the Anker struggles with. A 2,100Wh camping weekend it finishes 359Wh short of, and an 8-hour blackout it survives with 96Wh left in the tank. Those are the two jobs people buy a battery this size to do.
Portability & Form Factor
Selected because: 99 lbs against 41.7 lbs is what that extra capacity costs you, and it's the one gap no feature on either unit closes.
weight
99 lbs against 41.7 is a 57.3-pound difference, and that's not a spec so much as a floor plan. The Anker is a box you lift one-handed onto a workbench, a boat seat, or a balcony. The DELTA Pro is furniture: you choose where it lives once, and then you run extension cords from there.
That's survivable, and the DELTA Pro line does roll, on integrated wheels with a telescoping handleA2. But wheels are a surface story, not a weight story: flat and smooth is fine, uneven ground wants a cartA2. The honest test isn't whether you can lift 99 lbs. It's whether there's a step, a curb, or a stretch of lawn between storage and use. If there is, the capacity you paid for is capacity that stays in the garage.
Lifetime Value
Selected because: $0.13 against $0.12 per lifetime kilowatt-hour on identical 5-year warranties: the money argument is a draw, and it's worth seeing exactly why.
cost / lifetime kWh
$0.13 against $0.12 per lifetime kilowatt-hour is not a difference, it's rounding. The full rated life comes to 12,600 kWh for the DELTA Pro and 8,192 kWh for the Anker, both covered for 5 years, and the two prices track the two capacities closely enough that neither buyer wins.
Where the money does split is exposure. $1,899 across 5 years of warranty is $320 a year of covered ownership against the Anker's $200. Same terms, different amount sitting on the table. If either unit fails once the warranty is up, the DELTA Pro is the more expensive mistake, and that is the only line on this page where the numbers favour the Anker.
What the Specs Don't Tell You
Selected because: 7,200W of surge against 4,000W, a 60dB fan rating against 30dB, 20ms transfer against 10ms. The small print splits these two in both directions.
rated cycles
Surge is the row with teeth. 7,200W against 4,000W, on 3,600W and 2,400W of continuous output, which is a 2× ratio against 1.7×. Fridge and AC compressors pull two to three times their rated draw in the instant they spin up, so the label on the appliance isn't the number that decides whether it starts. Between the two, the SOLIX is the one that trips first, and its 2,400W continuous ceiling is the tighter constraint day to day, because that's what governs how many large things run at once.
Two rows break the other way. The Anker is rated 30dB to the DELTA Pro's 60dB, and it transfers to battery in 10ms against 20ms. Those transfer figures are manufacturer ceilings rather than anything we've timed, and both sit comfortably inside what a desktop or a router rides through, so treat that row as a tie with a nicer number printed on one side. The noise row is not a tie.
Strengths & trade-offs
EcoFlow DELTA Pro
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$899) than the SOLIX C2000 Gen 2.
- –Significantly heavier (+57.3 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
- –Can receive complaints about fan noise under heavy load.
Anker SOLIX C2000 Gen 2
Strengths
- +Costs $899 less
- +Lighter by 57.3 lb
Trade-offs
- –Weaker inverter (-1,200W) limits appliance compatibility.
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
DELTA Pro
1,741Wh usable leaves the SOLIX 359Wh short of this 2,100Wh weekend, while the DELTA Pro finishes it with 960Wh still in hand. Trim the load list and the Anker gets there. Take the weekend as modelled and it doesn't, and the shortfall lands on Sunday rather than Friday.
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
DELTA Pro
Both make it through the night, but they arrive very differently. The DELTA Pro ends at 54% used with 1,415Wh left; the SOLIX ends at 94% with 96Wh. If the lights come back on schedule, that distinction is academic. Outages don't keep a schedule.
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
320Wh is 18% of the SOLIX's 1,741Wh usable and 10% of the DELTA Pro's 3,060Wh, so the battery isn't what decides this one. What decides it is which box you're willing to put within arm's reach of a pillow, and that's the 41.7-lb one rather than the 99-lb one. Both switch to battery quickly enough, at 10ms and 20ms, that a wall-power cut won't wake the machine.
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
DELTA Pro
A 910Wh workday is comfortable on both: the SOLIX finishes with 831Wh spare, the DELTA Pro with 2,150Wh. The DELTA Pro takes it on headroom, which pays only if your workday occasionally turns into a work-weekend away from a socket. If it doesn't, this reserve is the part of the DELTA Pro you're least likely to ever use.
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
DELTA Pro
670Wh is a light lift for both, 22% of the DELTA Pro's usable capacity against 38% of the SOLIX's, so the DELTA Pro wins here on reserve that a tailgate never calls on. What you will notice is the walk from the car: 99 lbs against 41.7 lbs, repeated at the end of the game when you're carrying everything else too.
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 4,685Wh a day. The DELTA Pro comes up 1,625Wh short and the SOLIX 2,944Wh short, and those aren't gaps you close by switching a few things off. At this load you're choosing between an expansion battery bought at the same time as the base unit, or a fixed 12V house bank with its own inverter. A portable station on its own is the wrong tool.
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: DELTA Pro runs 14.9h vs 8.5h.
$1,899 list · direct from EcoFlow
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 0–204hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–40.8hHigh-Draw Appliances
These reveal the real limitsscale 0–3.1h¹ 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 DELTA Pro, on Power Score margin
Take the DELTA Pro if the unit gets to stay put. It clears five of the six scenarios we model against the SOLIX C2000 Gen 2's four, and it's the only one of the two that finishes a 2,100Wh camping weekend, where the Anker lands 359Wh short. The money never picks a side: the DELTA Pro is the cheaper energy per watt-hour up front, the Anker is fractionally cheaper per lifetime kilowatt-hour at $0.12 against $0.13, and the warranty is 5 years either way. Which leaves capacity as the only thing the extra spend actually buys, at close to the going rate rather than at a premium. The catch is 99 lbs against 41.7, and it's a real one. If the box has to be carried rather than rolled or driven to where it works, buy the Anker and this verdict flips.
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.
$1,899.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
or check the SOLIX C2000 Gen 2 price$999.99 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated August 9, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): CPAP, Tailgating, Apartment Balcony, Camping.
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 Pro rates 3.9/5 (33rd percentile of 16 Home Backup-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.
DELTA Pro: 99 lbs Is a Commitment
At 99 lbs, this is manageable but not fun to move. That's heavier than a large checked suitcase. How much it costs you depends on whether it rolls — wheels and a telescoping handle change the job completely at this weight, and our spec record doesn't track them, so look at the product photos before you plan on carrying it from the car.
60dB Is the Working Number, Not the Resting One
The DELTA Pro's 60dB rating describes the fans with the unit under load, which is when they have something to do. The SOLIX C2000 Gen 2 is rated 30dB. If this lives in a garage or a utility room, the row is a footnote and you can move on. If it lives where somebody sleeps, it's the row that decides the page, and the 41.7-lb unit has the second advantage of being the one you can carry back out of the bedroom.
Surge Power: Inverter Quality Indicator
The DELTA Pro has a 2× surge-to-continuous ratio vs the SOLIX C2000 Gen 2's 1.7×, and the higher absolute ceiling with it — 7,200W against 4,000W. At 2× it clears the 2× rule of thumb for absorbing motor startups — fridges, AC compressors and power tools briefly draw 2-3× their rated wattage. What decides whether a given motor starts is the ceiling, not the ratio: the SOLIX C2000 Gen 2 still surges to 4,000W, so check the startup draw of the heaviest thing you plan to run against that figure rather than assuming it trips.
10ms Against 20ms: Both Fast, One Faster
The SOLIX C2000 Gen 2 is stated at 10ms and the DELTA Pro at 20ms. Both are manufacturer ceilings rather than figures we've timed ourselves, and both sit inside what a desktop, a router, or a CPAP will ride through without noticing. Where it stops being academic is gear that documents its own strict transfer tolerance. If you're protecting something like that, check its number against these two rather than assuming either one clears it.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. Worth saying because the per-dollar framing can suggest otherwise: the SOLIX C2000 Gen 2 works out at 5 years of cover per $1,000 spent against the DELTA Pro's 2.6, but that spread is the price gap, not the terms.
Full record above — the Test Desk pick is the DELTA Pro.
Check DELTA Pro price →or check the SOLIX C2000 Gen 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
Both units have similar long-term ownership costs ($0.15/kWh vs $0.12/kWh). The price difference is what you see on the sticker — neither is a hidden bargain or rip-off. One caution on the lifespan row: the SOLIX C2000 Gen 2 takes longer to reach its cycle rating, but a cycle moves a different amount of energy on each unit — the DELTA Pro still delivers more over its shorter horizon (12,600 vs 8,192 kWh). Years measure wear, not usefulness.
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
X-Stream fast charging and the deepest catalogue in portable power, 12 to 15 models plus panels and smart home panels. One caution on the headline figure: EcoFlow's 180kWh modular expansion ceiling belongs to the DELTA Pro Ultra X, a different and far larger system. It is not what the unit on this page grows into.
Worth knowing
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
Anker's consumer-electronics engineering applied to batteries, with InfiniPower cells behind the 4,000-cycle rating, the higher of the two here. Our brand assessment credits Anker with strong value per watt-hour in this class, but that comes from other models in the SOLIX line. On this page the C2000 Gen 2's 49 cents a watt-hour is the pricier of the two.
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
Two different bets. EcoFlow offers the larger ecosystem and the faster release cadence, which matters if you expect to keep buying into it. Anker offers a smaller, simpler catalogue and far broader consumer-electronics recognition behind it. Neither difference outweighs 99 lbs against 41.7, or 3,600Wh against 2,048Wh. Buy the box, not the badge.
Growth path
DELTA Pro
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,600Wh.
Accepts up to 1,600W of solar. Enough for a serious multi-panel array.
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 DELTA Pro's higher solar ceiling (1,600W vs 800W) 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 Pro
The field record on this one is line-level rather than unit-level, so treat it accordingly: the reports we carry describe DELTA Pro-line behaviour, and the precise measured figures circulating for the line belong to the newer, heavier Pro 3A2A4. What travels cleanly is the platform's standing. It has been treated as the default home-backup box for years, running fridges, lighting, and a space heater through outages, though one of the two sources behind that is EcoFlow's own siteA1. One longer-run account has it as primary backup across months of overnight outages with nothing to reportA3.
The consistent knock is the fans. Under heavy draw they put out a high-pitched whine that's hard to ignore in a quiet room, while the same testing has it running quietly enough at light loadsA4. And the wheels are real but conditional: integrated wheels and a telescoping handle move it well on flat, smooth ground and want a cart on anything elseA2. Note also that the line's reputation rests on cycle counts in the thousands and a claim of ten-plus years of daily useA3, while our own figures put daily-cycling life at 9.6 years. Close, but the ledger is the more generous of the two.
“Long regarded as a gold standard for home backup — designed for high-draw appliances and full-scale battery expansion, running home essentials like a fridge, lighting, and a space heater through outages.”
Sources
backuppowerhub.com · us.ecoflow.co · outdoorgearlab.com · bobvila.com · powerstationadvisor.com · robbsutton.com
Anker SOLIX C2000 Gen 2
Everything we hold on the C2000 Gen 2 comes from hands-on reviewers rather than long-term owners: strong, consistent coverage, no six-month reports yetB1B2B4. That's first-impressions evidence, which is precisely the wrong kind for the questions that matter most about a battery. Nothing here tells you how it behaves several years in.
Within that limit it's uniformly good. Testers describe fans that never rise above a backgroundable whirr even at full power, reaching only about 35dB at a meter under high load, a touch above the 30dB on the spec sheetB1. Setup involves no firmware wrangling and no voltage oddities, you plug in and goB2, and the app's Bluetooth and Wi-Fi monitoring drew genuine praiseB3. One review put it among the most attractive 2 kWh stations on the marketB4, and the Gen 2 shed a substantial amount of weight against the original C2000B5.
“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
- Established home-backup platform with wheeled portability and massive expandability; the consistent knock is fan noise under heavy load. [DELTA Pro · 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
“Long regarded as a gold standard for home backup — designed for high-draw appliances and full-scale battery expansion, running home essentials like a fridge, lighting, and a space heater through outages.”
backuppowerhub.com / us.ecoflow.com — EcoFlow DELTA Pro review · 2025-2026 · [positive]
- A2
“Heavy but wheeled — integrated wheels and a telescoping handle help move its considerable weight, though they work best on flat, smooth surfaces; a cart is needed for uneven ground.”
outdoorgearlab.com / bobvila.com — DELTA Pro-line review · 2025-2026 · [mixed]
- A3
“Reliable through extended outage use — served as primary backup across multiple overnight outages over months, powering essentials simultaneously; LFP battery rated for thousands of cycles and 10+ years of daily use.”
powerstationadvisor.com / robbsutton.com — DELTA Pro-line review · 2025-2026 · [positive]
- A4
“Not silent under heavy load — under 2000W-plus draws the fans emit a noticeable high-pitched whine that's distracting in a quiet room, though it runs quietly enough at lighter loads.”
outdoorgearlab.com — DELTA Pro-line noise testing · 2025-2026 · [negative]
- 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 155 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 Pro
211 claims from 147 comments · 155 from owners · 39 with figures
- Price & value
- 37 · 26% negative
- Durability
- 22 · 73% negative
- Solar input
- 23 · 35% negative
- Runtime
- 18 · 23% negative
- Other
- 18 · 48% negative
What owners complain about
Bought October 2023, died June 2024.
Durabilitymeasuredownerafter 8 months25 agreedsource →
The 100 lb weight of the DELTA Pro is no joke.
Size & weightmeasuredowner14 agreedsource →
Even the 767's loudest fan state is far quieter than the DELTA Pro.
Noiseowner41 agreedsource →
What owners praise
Charges two DELTA Pros from two ~2,500W strings running at about 125V.
Solar inputmeasuredowner13 agreedsource →
Electric bill fell from $250 a month to between $26 and $44.
Price & valuemeasuredowner14 agreedsource →
Delta Pro with battery and 800W of solar keeps him fully off grid and happy.
Runtimeownerafter 8 months62 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 Pro if you…
- →You're buying blackout insurance for a house and the unit will live in a garage or utility room. It comes out of an 8-hour outage at 54% used, which is a second night you don't have to think about.
- →You car-camp on made sites, the kind of ground you'd happily wheel a suitcase acrossA2. A 2,100Wh weekend is the job the DELTA Pro does and the Anker doesn't.
- →You own solar panels or you're about to. 1,600W of input against 800W is twice the panel you're allowed to point at it, and it's what turns a multi-day outage from survivable into sustainable.
- →You want two large things running at once. 3,600W continuous with 7,200W of surge behind it is a different class of headroom from 2,400W and 4,000W.
Buy the SOLIX C2000 Gen 2 if you…
- →The unit has to move: up stairs, into a truck bed, onto a boat, out to a balcony. At 41.7 lbs one person does that without scheduling it.
- →It's sleeping in the bedroom. A 320Wh CPAP night uses 18% of its 1,741Wh usable, it's rated 30dB, and it transfers to battery in 10ms if the wall power drops mid-sleep.
- →You've added up your real loads and they sit under 1,741Wh. Paying $1,899 instead of $1,000 for capacity you never touch isn't extravagance, it's just waste.
- →You charge a big laptop off it. 140W over USB-C against 100W is the difference between full-speed charging and a compromise.
- →You'd rather start small and add later. Both units take expansion batteries from their own maker, so 2,048Wh isn't a ceiling you're stuck under.
If neither fits
Skip both if your days look like the Van Life Daily model. 4,685Wh leaves the DELTA Pro 1,625Wh short and the SOLIX 2,944Wh short, and those aren't gaps you close by switching things off. That load wants a fixed 12V house bank with its own inverter, or one of these bought together with its expansion battery on day one rather than hoped for later. Skip both also if the only thing you're powering is a CPAP: a 320Wh night doesn't need 2,048Wh, let alone 3,600Wh, and the difference is better spent on a battery actually sized for the job.
The Bottom Line
Buy the DELTA Pro if the box gets to stay where you put it. 44 cents a watt-hour against 49, matching 5-year warranties, and $0.13 against $0.12 per lifetime kilowatt-hour mean the money refuses to pick a side, so the decision falls to what 3,600Wh does that 2,048Wh doesn't: finish a 2,100Wh camping weekend, come out of an 8-hour outage at 54% used, and take 1,600W of solar the next morning rather than 800W.
The catch is 99 lbs against 41.7, and it's the one thing here that can't be argued away. If there's a staircase, a curb, or a stretch of soft ground between where it's stored and where you need it, the Anker's smaller battery is worth more than the DELTA Pro's bigger one, because the unit you'll actually go and fetch is the one that works. Everyone else: get the DELTA Pro.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the EcoFlow DELTA Pro worth the extra money over the Anker SOLIX C2000 Gen 2?
It's worth it if you'll use the capacity, and not otherwise. At $1,899 for 3,600Wh against $1,000 for 2,048Wh, the DELTA Pro is the cheaper energy of the two at 44 cents a watt-hour against 49, so the extra spend buys battery at a fair rate rather than a premium. But if your actual loads sit under the Anker's 1,741Wh usable, none of that helps you. You'd be buying headroom you never reach, and hauling 99 lbs of it around.
Which one is better for a power outage?
The DELTA Pro, on two separate counts. It finishes our 8-hour blackout model at 54% used against the Anker's 94%, so there's a second night in reserve rather than 96Wh. And on solar it refills 3,600Wh at up to 1,600W in about two and a quarter hours of full sun, where the Anker's 2,048Wh at up to 800W needs a little over two and a half. The bigger battery is also the quicker one to bring back.
Which is quieter, the DELTA Pro or the SOLIX C2000 Gen 2?
The SOLIX, clearly. It's rated 30dB against the DELTA Pro's 60dB, and independent testing put it around 35dB at a meter even under high load. Those are load ratings, though, not idle ones: the DELTA Pro line runs quietly at light draw, and the whine testers complain about turns up when it's working hard. If the unit shares a room with a sleeping person, take the Anker. If it lives in a garage, the number is academic.
Can either of these be expanded later?
Both accept expansion batteries from their own maker, so neither is a dead end at 3,600Wh or 2,048Wh. The DELTA Pro has the stronger version of that path, because its 1,600W solar ceiling is double the Anker's 800W and a larger bank needs more panel behind it to be worth having. Price the expansion battery before you commit, though. It's a separate purchase on either side.
Which one should I buy for a CPAP?
The Anker, and it isn't close on practical grounds. A CPAP night in our model is 320Wh, which is 18% of the SOLIX's 1,741Wh usable and 10% of the DELTA Pro's 3,060Wh, so capacity decides nothing. What decides it is that one of these is a 41.7-lb box that fits beside a bed and the other weighs 99 lbs. Both transfer to battery fast enough that the machine won't notice a wall-power cut, at 10ms and 20ms respectively.
Where to buy
EcoFlow DELTA ProPick
$1,899.00
$1,899.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
Anker SOLIX C2000 Gen 2
$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.