Head-to-head test
EcoFlow DELTA 3 Plus vs Anker SOLIX C1000 Gen 2
On paper these are twins: the same battery, the same cycle rating, the same warranty, and both take expansion batteries. The C1000 Gen 2 is cheaper, lighter and holds more steady output. The DELTA 3 Plus takes far more solar and peaks higher.
Full profiles: EcoFlow DELTA 3 Plus β Β· Anker SOLIX C1000 Gen 2 β
Looking for a different matchup? EcoFlow DELTA 3 vs Anker SOLIX C1000 Gen 2 Β· EcoFlow DELTA 3 Plus vs Anker SOLIX C1000
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
Spec deltas
Put the spec sheets side by side and you start looking for the catch. Both hold 1,024Wh on a battery rated for 4,000 cycles. Both carry five years of warranty, switch to battery in 10ms or less when the grid drops, and take add-on expansion batteries. Whatever separates them is in the smaller print.
The C1000 Gen 2 is the cheaper one by $189, and it's 2.1 pounds lighter. It also holds 2,000W of steady output to the DELTA 3 Plus's 1,800W. That's the power it can keep up, as opposed to the brief spike it allows while a motor starts. One reviewer had it refilled from the wall in about 49 minutesB1.
The DELTA 3 Plus answers with solar. It takes 1,000W from panels to the Anker's 600W, so it refills much faster from the sun, and it peaks higher. Reviewers keep raising one problem with it: fans that run at light loads and cycle on and off erratically, in a unit EcoFlow pitches as quietA1A2.
What the Numbers Reveal
Each conclusion stated first β the numbers behind it on one line, the full analysis below.
continuous output
With capacity, cycle life and warranty identical, the C1000 Gen 2 gives you 200W more continuous output for $189 less. Reviewers say that's enough to run a standard 1,500W space heater with room to spareB3.
the C1000 Gen 2 costs $530 vs the DELTA 3 Plus's $719the C1000 Gen 2 sustains 2,000W vs the DELTA 3 Plus's 1,800Wboth hold 1,024Wh on the same 4,000-cycle battery
Why it mattersIf you want the most steady power for the money, the C1000 Gen 2 is the plain pick.
solar input
It accepts two thirds more solar than the Anker and peaks 600W higher. Both units take expansion batteries, so the solar port sets how fast a bigger bank refills from panels. The hardest startup on this page is 400W, so the peak lead is never tested here.
the DELTA 3 Plus takes 1,000W of solar vs the C1000 Gen 2's 600Wthe DELTA 3 Plus surges to 3,600W vs the C1000 Gen 2's 3,000Wboth units are expandable
Why it mattersBuyers building around panels are the ones who should pay the DELTA 3 Plus's premium.
Reviewers say its fans start even at light loads and cycle on and off unpredictablyA1, and one linked the erratic cycling to a higher overheating risk under heavy loadsA2. The C1000 Gen 2's fans stay nearly silent at low loads and get loud only under heavy output or fast chargingB2. EcoFlow may fix its behaviour in a firmware updateA4.
the DELTA 3 Plus's fans run even at low load and cycle erraticallyA1the DELTA 3 Plus is marketed as near-silentA1the C1000 Gen 2 is quiet under 200W and only ramps up past 1,000WB2
Why it mattersIf the unit will sit in a quiet room running light loads, the C1000 Gen 2 is the calmer one to live with.
The specific dimensions that decide these two units β everything else is a tie.
What the Specs Don't Tell You
Selected because: Output, solar, surge and the DELTA 3 Plus's fan behaviour are where these two split.
The two split cleanly. The C1000 Gen 2 holds more steady output, 2,000W to 1,800W, and has one more USB-C port, though both top out at 140W over USB-C. The DELTA 3 Plus takes far more solar and peaks 600W higher, and it has six AC outlets to the Anker's five. Neither list is longer. They point at different buyers.
The fan is what tips it. Reviewers describe the DELTA 3 Plus's fans running at low loads and cycling erratically, and one tied that to a higher overheating risk under heavy loadA1A2. A firmware update may fix itA4. Until then, it's a real mark against a unit sold partly on being quiet.
Lifetime Value
Selected because: Identical batteries leave the $189 price gap as the only difference in cost to own.
cost / lifetime kWh
The batteries are the same size with the same cycle rating, so each is rated to deliver the same lifetime energy. Price is the only difference in cost to own. That puts the Anker at $0.13 per lifetime kilowatt-hour against the DELTA's $0.18.
So the $189 buys the DELTA 3 Plus's solar headroom and higher peak, and no extra battery or life. If this were going on my cabin wall with a row of panels outside, I'd pay it. If you charge mostly from the wall, you're paying for a ceiling you won't reach, and the Anker is the better deal.
Portability & Form Factor
Selected because: The C1000 Gen 2 is 2.1 lbs lighter, a small but real edge.
weight
The C1000 Gen 2 is the lighter unit at 24.9 pounds to 27. For a box that moves between rooms or rides to a campsite, that's a small, steady advantage.
Both are easy one-person lifts, so weight won't decide this on its own. It goes in the Anker's column next to the lower price.
Brand Trust
Selected because: EcoFlow's stronger app against Anker's value, with the DELTA 3 Plus's fan in the middle.
EcoFlow brings the stronger software: the biggest range in portable power and a top-rated app, 4.6/5 on iOS. Anker's app is close behind at 4.5/5, and it has the consumer-electronics name, though its SOLIX support has slipped from the high standard it once set.
EcoFlow's lead is in software, and the DELTA 3 Plus's problem is in how its hardware behaves, the erratic fanA1A2. The Anker's noise is more predictableB2. Support is uneven at both, so buy from a retailer with an easy return window.
Strengths & trade-offs
EcoFlow DELTA 3 Plus
Strengths
- +Faster solar charging
Trade-offs
- βSubstantially more expensive (+$189) than the SOLIX C1000 Gen 2.
Anker SOLIX C1000 Gen 2
Strengths
- +Costs $189 less
- +Lighter by 2.1 lb
- +Higher AC output
Trade-offs
- βNo 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 Β· 2 nights Β· needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
Neither unit covers this scenario's 2,100Wh: the DELTA 3 Plus comes up 1,230Wh short (about 41% covered), the SOLIX C1000 Gen 2 1,230Wh (41%). Treat this as partial cover β enough for the essentials in it, not the whole list.
Battery budget usedlower = more headroom
LOADΒ Β Phone Charger 15WΓ6h Β· LED Lights 40WΓ8h Β· Box Fan 75WΓ14h Β· CPAP Machine 40WΓ16h
SCN-02 Β· 8 hours Β· needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Neither unit
Neither finishes alone. Both stop 775Wh short, about 53% of the list. Both take expansion batteries, which is the real fix. If the panels are out mid-outage, the DELTA 3 Plus's 1,000W solar input refills it faster, and for a multi-day outage with sun that matters most.
Battery budget usedlower = more headroom
LOADΒ Β Fridge 150WΓ8h Β· Router + Modem 20WΓ8h Β· LED Lights (4 bulbs) 40WΓ6h Β· Phone Charger 15WΓ3h
SCN-03 Β· 8 hours Β· needs 320Wh
CPAP Overnight
Sleep therapy without interruption β the #1 medical use case
Either unit
Both run a CPAP night with plenty left, using 37% of their usable energy each. Capacity can't separate them, and neither can the published noise ratings, which each maker measures its own way. For a bedside, read the reviewer reports on fan behaviour at light loads before you choose.
Battery budget usedlower = more headroom
LOADΒ Β CPAP Machine 40WΓ8h
SCN-04 Β· 8 hours Β· needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Neither unit
Both come up 40Wh short of the 910Wh day after our flat allowance, so skip one small thing and either one finishes. Identical batteries make this a tie on energy. For a desk, the tiebreak is how each one's fans behave at light load, and the reviewer reports on this page cover that.
Battery budget usedlower = more headroom
LOADΒ Β Laptop 60WΓ8h Β· External Monitor 30WΓ8h Β· Router + Modem 20WΓ8h Β· Phone Charger 15WΓ2h
SCN-05 Β· 4 hours Β· needs 670Wh
Tailgate Party
Game day power for the crew
Either unit
Both handle game day easily. Since capacity isn't the deciding factor, weight is: at 24.9 lbs the SOLIX C1000 Gen 2 is the one you'll be glad you brought. Fan noise under load is worth a listen too β it's audible in the lulls between songs.
Battery budget usedlower = more headroom
LOADΒ Β Blender 400WΓ0.5h Β· LED TV (55") 80WΓ4h Β· Bluetooth Speaker 15WΓ4h Β· Phone Charger (Γ3) 45WΓ2h
SCN-06 Β· 24 hours Β· needs 4,685Wh
Van Life Daily
A full day of mobile living β the ultimate endurance test
Neither unit
Neither unit covers this scenario's 4,685Wh: the DELTA 3 Plus comes up 3,815Wh short (about 19% covered), the SOLIX C1000 Gen 2 3,815Wh (19%). 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
LOADΒ Β Mini-Fridge 150WΓ24h Β· Laptop 60WΓ4h Β· Phone Charger 15WΓ3h Β· LED Lights 40WΓ5h Β· Fan 75WΓ8h
The Load Test
RUNTIME = (Wh Γ 0.85) Γ· 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
Dead heat β both run this 205W load for roughly 4.2h. Pick on price, weight, or ports.
Planning for more than this? Describe your whole setup and get it sizedΒ β
Modeled from the spec record β same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.ΒΉ
Essentials
The basics you need runningscale 0β58hComfort & Convenience
Makes off-grid life actually enjoyablescale 0β11.6hHigh-Draw Appliances
These reveal the real limitsscale 0β0.9hΒΉ Runtime = (capacity Γ 0.85) Γ· 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 β see methodology.
Conclusion
October 25, 2026
Verdict: the SOLIX C1000 Gen 2
The Anker SOLIX C1000 Gen 2 is the better buy for most people. The two share the same 1,024Wh, the same 4,000-cycle battery, a five-year warranty, a β€10ms UPS switchover and room for expansion batteries, so the differences decide it. The C1000 Gen 2 costs $189 less, weighs 2.1 lbs less and holds 2,000W continuously to the DELTA's 1,800W. One reviewer had it fully recharged in about 49 minutesB1. The DELTA 3 Plus takes 1,000W of solar to the Anker's 600W, peaks at 3,600W and has EcoFlow's stronger app. Reviewers also flag its fans for running at light loads and cycling erraticallyA1A2. If you charge mostly from panels, take the DELTA 3 Plus. Otherwise take the Anker.
Today the SOLIX C1000 Gen 2 is $499.99, $30 under its typical $529.99. The verdict weighs typical prices, not today's. Prices checked 28 days ago.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of October 25, 2026. The links below open EcoFlow's and Anker's current prices.
$499.99 Β· direct from Anker
down from $530 Β· 6% below usual
Last checked 28 days ago. Prices move β check before you buy.
or check the DELTA 3 Plus price$719.00 list
Written by Ian Schneider, Solar & Off-Grid Tester Β· Station Arena Test Desk Β· Updated October 25, 2026
Black Friday Β· 26 days out
Prices to beat:DELTA 3 Plus $649SOLIX C1000 Gen 2 $450
The lowest we have recorded for each. A Black Friday price above it is a sale that unit has already had.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Full specifications
α΅ Derived: price Γ· rated capacity. See the data behind our comparisons β
Comparison ToolAdd more power stations, side by sideOpen Tool βHow these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it β no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews β see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity Γ 0.85 inverter efficiency) Γ· 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 βClass ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews β 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 5β . Here, DELTA 3 Plus rates 4.3/5 (62nd percentile of 27 Everyday-class units), and SOLIX C1000 Gen 2 rates 4.9/5 (96th percentile of 27 Everyday-class units).
How the class ranking is computed βTest Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
3,600W Surge Against 2,000W Steady
The DELTA 3 Plus peaks at 3,600W, twice its 1,800W rating, which gives a pump or compressor more room to start. The C1000 Gen 2 peaks at 3,000W but holds 2,000W continuously. So the DELTA has the bigger startup spike and the Anker holds more once things are running. The hardest startup on this page is 400W, so check your own worst load against 3,000W first. If it clears, the steady rating is the one to compare.
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 C1000 Gen 2 works out at 9.4 years of cover per $1,000 spent against the DELTA 3 Plus's 7, but that spread is the price gap, not the terms.
Full record above β the Test Desk pick is the SOLIX C1000 Gen 2.
Check SOLIX C1000 Gen 2 price βor check the DELTA 3 Plus priceOwnership Analysis
What happens after you buy β 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
β warranty ends Β· Reaching the cycle rating means ~80% capacity remains β degraded, not dead.
Analyst note
The SOLIX C1000 Gen 2 wins on both sticker price and long-term value. At $0.13/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner. One thing to know reading the table: both carry the same 4,000-cycle rating, so the lifetime rows are sticker price and capacity in disguise β the wear horizon is identical and decides nothing here.
Brand trust
EcoFlow
Ecosystem
Largest in portable power β 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 β 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 β Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) Β· 4.2/5 Android (~17,000 ratings)
Unique strength
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. At the top of the range sit two whole-home paths: the TITAN line, one 5 kWh unit that grows to 30 kWh, and the DELTA Pro Ultra platform, which stacks batteries and inverters further β flagship paths, not line-wide features.
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 β 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) Β· 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 β 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
EcoFlow runs the deepest range in portable power and the better-rated app, with a strong panel lineup that suits the DELTA 3 Plus's 1,000W input. Anker counters with parent-brand trust, an app nearly as good and strong value per watt-hour, though its SOLIX support has slipped from a high standard. Buy from a retailer with an easy return window either way, and let your solar plans break the tie.
Growth path
DELTA 3 Plus
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit β useful if your needs may climb past 1,024Wh.
Accepts up to 1,000W 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 C1000 Gen 2
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit β useful if your needs may climb past 1,024Wh.
Accepts up to 600W of solar. Suitable for a 1-2 panel setup.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are Anker-specific. You're investing in the Anker ecosystem.
Realistic full solar rechargeat 70% of rated panel output β see methodology
Analyst note
Both expand, but the DELTA 3 Plus's higher solar ceiling (1,000W vs 600W) gives it the stronger off-grid growth path β more panels can feed a bigger bank as it grows.
What Owners Report
Patterns from published owner reports and long-term reviews β every claim cited to its source below.
EcoFlow DELTA 3 Plus
Reviewers praise the DELTA 3 Plus for speed: very fast recharging and a β€10ms UPS switchover that kept connected gear powered without a breakA3. Its 1,000W solar input is a real off-grid strength.
The reviews keep coming back to the fans. They start even under low loads and cycle on and off erratically, which works against the near-silent operation EcoFlow marketsA1. One reviewer said the erratic cycling raises the risk of overheating under heavy loadsA2. Reviewers expect EcoFlow can fix it with a software update, as it has on other unitsA4. As tested, it's the unit's defining flaw.
βOtherwise well-designed, with very fast recharge times and a seamless sub-10ms UPS switchover for uninterrupted power.β
Sources
thesolarlab.com
Anker SOLIX C1000 Gen 2
Reviewers widely rate the C1000 Gen 2 the mid-size unit to beat in 2026, a refined, fast-charging update to a popular platformB4. HyperFlash, Anker's fast wall-charging mode, refilled it in roughly 49 minutesB1, and its output runs a standard 1,500W space heater with headroomB3.
Its most common complaint is fan noise. It's nearly silent at low loads and gets loud during fast charging or heavy outputB2. The fans stay quiet until real load arrives, so it's the steadier choice for light, in-room useB2.
βFast HyperFlash charging β a full recharge in roughly 49 minutes, noticeably quicker than the original C1000's ~58-80 minutes.β
Sources
thepowerpick.com Β· macrumors.com Β· outdoorgearlab.com Β· technerdo.com Β· mensjournal.com Β· 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
- The DELTA 3 Plus's headline weakness is fan behavior β fans run even at low load and cycle erratically, undercutting its quiet-UPS marketing. [DELTA 3 Plus Β· 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 Β· 3 entries]
- A1
βMarketed as near-silent, but real-world fan performance is a significant flaw: the fans activate even under low loads and cycle on and off erratically, which limits its effectiveness as a quiet UPS.β
T3 β EcoFlow DELTA 3 Plus review: Lightning-fast charging with a noisy flaw; thesolarlab.com β DELTA 3 Plus Review Β· 2026 Β· [negative]
- A2
βPart of why it stays quiet is that the internal fans aren't always doing their job properly β the erratic cycling raises the risk of the unit overheating when running heavy loads.β
thesolarlab.com β EcoFlow DELTA 3 Plus Review: Amazing, but One Big Quirk? Β· 2026 Β· [negative]
- A3
βOtherwise well-designed, with very fast recharge times and a seamless sub-10ms UPS switchover for uninterrupted power.β
T3 / thesolarlab.com β DELTA 3 Plus reviews Β· 2026 Β· [positive]
- A4
βReviewers note EcoFlow should be able to resolve the fan behavior with a software update, as it has done for other power stations after release.β
thesolarlab.com β DELTA 3 Plus Review Β· 2026 (dated claim β may be partially addressed by firmware) Β· [mixed]
- B1
βFast HyperFlash charging β a full recharge in roughly 49 minutes, noticeably quicker than the original C1000's ~58-80 minutes.β
thepowerpick.com / macrumors.com β Anker SOLIX C1000 Gen 2 review Β· 2026 Β· [positive]
- B2
βFan noise is the single most common complaint β 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.β
outdoorgearlab.com / technerdo.com β C1000 Gen 2 review Β· 2026 Β· [negative]
- B3
βThe higher continuous output crosses a useful threshold over the original β enough to run a standard 1,500W space heater with headroom to spare.β
thepowerpick.com / mensjournal.com β C1000 Gen 2 review Β· 2026 Β· [positive]
- B4
βReviewers describe it as a refined, powerful, fast-charging update to a popular 1kWh platform, widely rated the mid-size unit to beat in 2026.β
thepowerpick.com / powerstationadvisor.com β C1000 Gen 2 review Β· 2026 Β· [positive]
Research compiled October 25, 2026.
What Owners Actually Report
Drawn from 58 comments on independent review channels β 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 3 Plus
70 claims from 44 comments Β· 58 from owners Β· 26 with figures
- Solar input
- 10 Β· 26% negative
- Price & value
- 8 Β· 19% negative
- Runtime
- 6 Β· 12% negative
- Durability
- 8 Β· 69% negative
- App & firmware
- 8 Β· 50% negative
What owners complain about
The 60V and 15A per-port limits stop him putting three 195W panels on each solar input.
Solar inputmeasuredowner14 agreedsource β
Draws about 30W just to convert, so a 70W load actually pulls closer to 100W.
Idle drainmeasuredowner7 agreedsource β
Unit, extra battery, panels, stands and cables came to about $2,000 total.
Price & valuemeasuredowner7 agreedsource β
What owners praise
Swapped a DELTA Pro for four DELTA 3 Plus at 27 lb each for portability and redundancy.
Size & weightmeasuredowner34 agreedsource β
Each DELTA 3 Plus has two 500W solar inputs.
Solar inputmeasuredowner34 agreedsource β
Bought four at $649 each and runs a fridge, 8000 BTU AC, dehumidifier and office.
Price & valuemeasuredowner34 agreedsource β
Anker SOLIX C1000 Gen 2
22 claims from 14 comments Β· 18 from owners Β· 6 with figures
- Price & value
- 4 Β· 0% negative
- Runtime
- 3 Β· 15% negative
- UPS switchover
- 2 Β· 0% negative
- Inverter & surge
- 1 Β· 0% negative
- Solar input
- 1 Β· 0% negative
What owners complain about
Gen 2 loses the gen 1's ability to add an expansion battery.
Expandability23 agreedsource β
Same app failure as his other brands: paired devices go missing on later launches.
App & firmwareowner2 agreedsource β
Can only pull 100W from the C1000 Gen 2's 12V ports and cannot confirm how XT60i sensing works.
Otherownersource β
What owners praise
Two units keep his gas furnace, three fridge/freezers and network alive for 5+ hours.
Runtimemeasuredowner15 agreedsource β
Anker 1000 gen 2's edge is a 2000W inverter, also at 25 pounds.
Inverter & surgemeasuredowner8 agreedsource β
Got the C1000 gen 2 on sale for $379 plus a $219 200W panel.
Price & valuemeasuredowner6 agreedsource β
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 β for measurements we ran ourselves, see the methodology.
Who Should Buy Which
Buy the DELTA 3 Plus if youβ¦
- βYou charge mostly from solar and want the 1,000W input, two thirds more than the Anker's 600W.
- βYou want the higher 3,600W peak for a motor that's hard to start.
- βYou need six AC outlets rather than five.
- βYou want EcoFlow's app and range, and you'll accept the fan behaviour or wait on a firmware fixA4.
If neither fits
Both hold 1,024Wh, so neither covers our eight-hour blackout list alone. Each stops 775Wh short. Both take expansion batteries, which is the fix if you want one system to carry a full outage. If you'd rather not add a second box, look at a bigger station instead of paying up for either of these.
The Bottom Line
The C1000 Gen 2 is the better all-round buy. It costs $189 less, weighs less and holds more steady output, on the same capacity, battery life and UPS speed. Its fans also behave predictably, which reviewers say the DELTA 3 Plus's don't yetA1B2. For a buyer who charges mostly from the wall, it's the easy call.
The DELTA 3 Plus earns its premium in one case: heavy solar use, where its 1,000W input is two thirds more than the Anker's. It adds a higher peak and the better-rated app. If that's your setup and you can live with the fans, or wait for EcoFlow to patch themA4, it's a strong unit. Everyone else should take the Anker.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
EcoFlow DELTA 3 Plus or Anker SOLIX C1000 Gen 2: which should I buy?
The C1000 Gen 2 for most buyers. It's $189 cheaper, 2.1 pounds lighter and holds 200W more steady output, and one review had it recharged in about 49 minutes. It matches the DELTA 3 Plus on capacity, cycle life and UPS speed. Choose the DELTA 3 Plus if you charge mostly from solar, since it takes 1,000W to the Anker's 600W, or if you need its higher peak and can live with its flagged fan behaviour.
What's the problem with the DELTA 3 Plus's fans?
Reviewers report the fans activate even under low loads and cycle on and off erratically, which undercuts EcoFlow's near-silent marketing and its use as a quiet UPS; under heavy load, the erratic cycling can raise overheating risk. EcoFlow may be able to fix it with a firmware update, but as tested it's the unit's most-cited weakness.
Which is better for solar charging?
The DELTA 3 Plus. It accepts 1,000W of solar input to the C1000 Gen 2's 600W, so it refills from a panel array much faster and suits an off-grid setup better. If solar is your main charging source, that's the strongest reason to pay the DELTA 3 Plus's $189 premium.
Are they otherwise similar?
Very. Both hold 1,024Wh on a 4,000-cycle LFP (lithium iron phosphate) battery, take expansion batteries, carry a five-year warranty and switch over in 10ms or less for UPS duty. The differences are the Anker's lower price, higher steady output and lighter weight, against the DELTA 3 Plus's greater solar input, higher peak and better-rated app, and its flagged fan behaviour.
Related comparisons
Where to buy
EcoFlow DELTA 3 Plus
$719.00
$719.00 Β· direct from EcoFlow
Last checked 28 days ago. Prices move β check before you buy.
Anker SOLIX C1000 Gen 2Pick
$499.99
$499.99 Β· direct from Anker
down from $530 Β· 6% below usual
Last checked 28 days ago. Prices move β check before you buy.
Prices may vary by retailer and are subject to change.