Head-to-head test
EcoFlow DELTA 3 1500 vs Anker SOLIX C2000 Gen 2
One of these two is no longer for sale, and the one that is beats it on capacity, output, surge ceiling, solar input and cycle life, so the live question isn't which unit but which brand you want to be in.
Full profiles: EcoFlow DELTA 3 1500 → · Anker SOLIX C2000 Gen 2 →
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
Spec deltas
EcoFlow has folded the DELTA 3 1500 out of its range, so this comparison has exactly one live candidate: the Anker SOLIX C2000 Gen 2. That's the headline, not a footnote. The page below still exists for the two readers it genuinely serves, which is whoever already owns a 1500 and whoever is looking at leftover stock somewhere and wants to know what they'd be getting into.
The awkward part is that EcoFlow's own replacement isn't the Anker. It's the DELTA 3 Max, the unit EcoFlow now points 1500 shoppers toward, and it isn't on this page. So keep three boxes straight: the 1500 you searched for, the SOLIX C2000 Gen 2 you're now looking at, and the DELTA 3 Max if you'd rather not leave the brand. We can compare the first two on specs all day. Only the second has a price and a buy button.
On specs the Anker would have taken this regardless. 2,048Wh against 1,536Wh, 2,400W continuous against 1,800W, 4,000 rated cycles against 3,000, and an 800W solar ceiling against 500W. The DELTA 3 1500 wins the scale at 36 lbs against 41.7 lbs. That's the entire list.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
solar input
Then day two of the outage arrives, and the unit that lasted longer is also the one that refills faster. 2,048Wh at an 800W ceiling is about two and a half hours of strong sun; 1,536Wh at 500W is about three. The smaller battery takes longer to put less energy back, every single morning the grid stays down.
DELTA 3 1500: 1,536Wh rated, which the flat 85% usable derate turns into 1,306WhSOLIX C2000 Gen 2: 2,048Wh rated, 1,741Wh usable on the same derateThe 8-Hour Blackout profile draws 1,645WhSolar input ceilings: 500W on the DELTA 3 1500, 800W on the SOLIX C2000 Gen 2
Why it mattersIf you're buying this size of unit for grid failures rather than picnics, capacity and recharge speed point the same way here, which doesn't happen as often as you'd think.
continuous output
A compressor's inrush is a wattage, not a multiple of somebody's rating. It doesn't know or care what the inverter is rated for; it asks for a number of watts and either gets them or trips. On that question the Anker is the stronger starter by 400W. The ratio tells you something real but narrow: measured against its own peak, the EcoFlow's continuous rating sits at half (1,800 of 3,600W) and the Anker's at about six-tenths (2,400 of 4,000W). That's a design choice about reserve, not a capability.
DELTA 3 1500: 1,800W continuous, 3,600W surge, a 2x ratioSOLIX C2000 Gen 2: 2,400W continuous, 4,000W surge, a 1.7x ratioThe largest switch-on spike across this page's scenarios is the 400W one in Tailgate Party, and both units start it
Why it mattersSize for the biggest thing you'll switch on, not for the prettiest ratio. The 400W of extra ceiling is the part that starts a motor.
rated cycles
The 8.2-year figure quietly assumes you start at cycle zero, and a discontinued unit is precisely the case that breaks the assumption. A 1500 pulled from leftover stock or bought secondhand starts somewhere down that count with no reliable way to read where, while the Anker's 11 years begin the day the box arrives.
Rated cycles: 4,000 on the SOLIX C2000 Gen 2, 3,000 on the DELTA 3 1500A cycle is 2,048Wh on the Anker and 1,536Wh on the EcoFlow, so rated lifetime energy is 8,192 kWh against 4,608 kWhAt daily cycling that reads as 11 years against 8.2The DELTA 3 1500 is out of EcoFlow's range, so any unit you find now is leftover or secondhand
Why it mattersIf you're weighing a clearance 1500 against a new C2000 Gen 2, you aren't comparing 8.2 years to 11. You're comparing an unknown remainder to 11.
Where it pays is the trailer already wired for shore power. You plug the C2000 Gen 2 into the same cord the campground pedestal takes and the trailer's own circuits do the rest, instead of threading extension cords through a window. The EcoFlow makes you thread the cords. It hands you four USB-A ports against the Anker's one in exchange, which is the better trade only if your household is still on older cables.
SOLIX C2000 Gen 2 ports: 6 AC, a 30A RV outlet, 3 USB-C (two at 140W, one at 15W), 1 USB-ADELTA 3 1500 ports: 6 AC, no 30A RV outlet, 2 USB-C up to 140W, 4 USB-AVan Life Daily needs 4,685Wh and neither unit covers it. The Anker gets 37% of the way, the EcoFlow 28%
Why it mattersIf you tow a trailer, weigh the 30A outlet above the capacity gap. Everyone else should notice the USB-A count before assuming the bigger unit wins every row.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: The gap between 1,536Wh and 2,048Wh only matters where it crosses a load, and the 8-hour blackout at 1,645Wh is the one row where it does.
Three of the six rows go to the Anker outright, one is a tie both units win, and two go to nobody. The row that decides anything is the blackout. Everything smaller than that, the CPAP night at 320Wh, the tailgate at 670Wh, the workday at 910Wh, both units clear with slack, and on those rows the capacity difference is a number on a page rather than something you'd feel. The 8-hour outage at 1,645Wh is where 1,306Wh of usable energy stops being enough and 1,741Wh starts being enough.
The two rows nobody wins deserve more of your attention than the three the Anker takes. Weekend camping wants 2,100Wh and van life wants 4,685Wh, and the honest answer on both is that these are the wrong size of box: the Anker reaches 83% and 37% respectively, the EcoFlow 62% and 28%. Getting most of the way is genuinely useful if you planned for it. It's a bad Sunday if you assumed you were covered.
What the Specs Don't Tell You
Selected because: Surge ceiling, UPS class, cycle life and a missing noise figure are where these two actually diverge once capacity is settled.
rated cycles
The noise card is the one that should move you, and it does it by admitting it can't tell you anything. Anker publishes 30dB for the C2000 Gen 2, a spec-sheet floor rather than a measurement. EcoFlow published nothing for the 1500 and now never will, because the model has left the range. If the plan is a bedside table, a nursery, or a thin-walled apartment, one of these units has a number you can argue with and the other has a blank.
The rest of the cards split more evenly than the verdict does. Warranty is a flat tie at five years each. The two surge figures disagree with each other on purpose, and the cycle-life card is where a spec gap turns into years. Read them as four separate questions rather than a scoreboard. The only genuinely close one is the UPS class, where a rated 10ms ceiling and a rated 15ms ceiling are both ratings rather than measured results, and both are fine for a router.
Growth Path
Selected because: Both take expansion batteries, so the separator is what can feed them: an 800W solar ceiling against 500W.
solar input
Both units take expansion batteries, so expandable decides nothing here. What separates them is what can feed the expanded bank: 800W of solar against 500W. Bolt more capacity onto a 500W ceiling and you've built something that takes longer to fill every time you empty it, which is the opposite of what growth is supposed to do.
That 300W is also the quiet reason the Anker is a better base for a system rather than merely a better box. A bigger battery that refills faster compounds. A bigger battery that refills at the same rate just means more waiting. If you're certain you'll never add a second battery or a third panel, skip this section entirely, and most people who say that turn out to be right about themselves.
Brand Trust
Selected because: With the DELTA 3 1500 out of EcoFlow's range, the live choice is Anker's box against EcoFlow's own successor, which puts support and ecosystem in the deciding column.
The brand column matters more than usual here, because the live comparison isn't really EcoFlow against Anker. It's Anker against EcoFlow's replacement for the unit you searched for. EcoFlow's pitch is the deepest ecosystem in portable power and the fastest charging inside it, with a support record that reads like a coin flip: prepaid replacement labels in one column, long waits and refurbished units against new claims in the other. Anker's pitch is the parent brand, the same company whose cables are in your drawer, with service that was famously painless and by recent accounts isn't as painless as it was.
The line in EcoFlow's file that matters most on this particular page is that it offers no parts or service outside warranty. On a current model that's a footnote. On one folded out of the range it sets the ceiling on what a leftover is worth: our record carries five years of cover, and past that there's no official path to a repair. That single sentence does more to settle this page than any spec on it.
Strengths & trade-offs
EcoFlow DELTA 3 1500
Strengths
- +Lighter by 5.7 lb
Trade-offs
- –Weaker inverter (-600W) limits appliance compatibility.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the SOLIX C2000 Gen 2's 4,000, so it wears out sooner.
Anker SOLIX C2000 Gen 2
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –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 covers a full weekend. The profile wants 2,100Wh, the SOLIX C2000 Gen 2 reaches 83% of it and the DELTA 3 1500 62%, so both send you home with something still unpowered on Sunday. That's survivable if the thing you drop is the coffee maker rather than the fridge. Plan around the gap or bring a panel.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
SOLIX C2000 Gen 2
This is the row that decides the page. The SOLIX C2000 Gen 2 finishes the eight hours with 96Wh in hand; the DELTA 3 1500 stops 339Wh short, about 79% of the way through, which in practice means it quits before the outage does. Both units start every load involved. Only one of them lasts the night.
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 cover the night, and it isn't close. A CPAP is about 40W for eight hours, so the SOLIX C2000 Gen 2 uses 18% of its usable energy and the DELTA 3 1500 25%. Capacity decides nothing here. Fan noise would, and only the Anker publishes a figure to be held to, 30dB, spec-sheet rather than measured. With the 1500 out of production, no figure is coming.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
SOLIX C2000 Gen 2
The SOLIX C2000 Gen 2 clears the workday at 52% used, banking 831Wh — late work, extra calls, or a second laptop charge without arithmetic. The DELTA 3 1500 at 70% also finishes, with 396Wh of slack for the unplanned.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
SOLIX C2000 Gen 2
The Anker wins on paper and the EcoFlow is the one you'd rather carry. Game day wants 670Wh, leaving the SOLIX C2000 Gen 2 at 38% used and the DELTA 3 1500 at 51%, so both coast. What you'll actually notice is 41.7 lbs against 36 on the walk from the trunk. That's the one row where the retired unit is the nicer object, and it's still the one you can't buy.
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 of these is a van battery. The profile wants 4,685Wh a day; the SOLIX C2000 Gen 2 covers 37% of it and the DELTA 3 1500 28%. Expansion batteries close some of that, but if you're living in the vehicle you want a bank wired in, not a suitcase you re-plug every morning. Treat either one as a bridge or a backup, not the system.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: SOLIX C2000 Gen 2 runs 8.5h vs 6.4h.
Sold on Amazon
Planning for more than this? Describe your whole setup and get it sized →
Modeled from the spec record — same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.¹
Essentials
The basics you need runningscale 0–116.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–23.2hHigh-Draw Appliances
These reveal the real limitsscale 0–1.7h¹ Runtime = (capacity × 0.85) ÷ appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads — see methodology.
Conclusion
September 19, 2026
Verdict: the SOLIX C2000 Gen 2, on Power Score margin
The SOLIX C2000 Gen 2 wins because it's the only one of these two you can still buy, and because it would have won most of this comparison anyway. It carries 512Wh more battery (2,048 against 1,536), 600W more continuous output, a 400W higher surge ceiling, a 300W higher solar input and 1,000 more rated cycles. The DELTA 3 1500 is the lighter box at 36 lbs against 41.7, and that is the whole of what it wins here. A 5.7 lb saving doesn't buy back 512Wh, and it certainly doesn't buy back a product line. If you want to stay inside EcoFlow's ecosystem, the DELTA 3 Max is the successor EcoFlow names; if you're brand-agnostic, the Anker is the better box on its own merits.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of September 19, 2026. The links below open Anker's current price.
Sold on Amazon · today’s price is on the listing
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated September 19, 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 3 1500 rates 5.0/5 (99th percentile of 27 Everyday-class units), and SOLIX C2000 Gen 2 rates 4.1/5 (48th percentile of 26 Large-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
Surge: the ratio flatters the smaller inverter
The DELTA 3 1500 holds the higher headroom multiple, 2x from 1,800W continuous to a 3,600W peak, and the SOLIX C2000 Gen 2 holds the higher actual ceiling, 1.7x from 2,400W to 4,000W. These answer different questions, and appliances only ask the second one. A compressor draws a number of watts when it kicks on, not a multiple of whatever the inverter is rated for, so the 400W between 3,600 and 4,000 is the part that decides whether a motor starts. What the ratio genuinely tells you is how much reserve each design keeps above itself: measured against its own peak, the EcoFlow's continuous rating sits at half and the Anker's at about six-tenths. Interesting. Decisive about nothing.
UPS Switchover: ≤10ms vs ≤15ms
Both list a UPS mode, at different rated speeds. The SOLIX C2000 Gen 2 is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The DELTA 3 1500 is rated ≤15ms — fine on paper for routers and most electronics; the fussiest PC power supplies sit right at this line. If a computer with unsaved work is the thing being protected, the stated class is worth the attention; nothing here is a lab result.
Warranty: identical terms, unequal futures
Both records carry five years, so on terms alone this is a dead tie and there's nothing here to weigh. What isn't equal is what stands behind the term. The SOLIX C2000 Gen 2 is a current Anker product, so a claim lands on a live queue for a unit still in the catalogue. The DELTA 3 1500 has left EcoFlow's range, and EcoFlow offers no parts or service outside warranty, which turns those five years into a hard edge rather than a soft one. Same number on both rows. Read the second one as a countdown.
Cycle life: count the energy, not the cycles
4,000 rated cycles against 3,000 undersells the gap, because the Anker's cycles are bigger. A cycle is 2,048Wh on the SOLIX C2000 Gen 2 and 1,536Wh on the DELTA 3 1500, which works out to 8,192 kWh of rated lifetime energy against 4,608 kWh. That's 3,584 kWh more, close to 1.8 times as much. At daily cycling it reads as 11 years against 8.2. Neither battery dies at the limit; both settle near 80% of original capacity and keep going. The wrinkle specific to this page is that 8.2 years assumes a unit starting at cycle zero, and a discontinued model rarely does.
Only one of these has a noise figure, and there's no second one coming
Anker publishes 30dB for the SOLIX C2000 Gen 2. EcoFlow published nothing for the DELTA 3 1500, and now that the model is out of the range, nothing is what it stays. That absence is not evidence the EcoFlow is loud. It's the absence of anything to hold it to. Treat the 30dB as what it is, a spec-sheet figure rather than a measurement taken in your bedroom, and treat the blank as a genuine cost if the unit is going on a nightstand. A number you can argue with. A blank you can only gamble on.
Full record above — the Test Desk pick is the SOLIX C2000 Gen 2.
Check SOLIX C2000 Gen 2 price →Ownership 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 3 1500 is no longer sold, so there is no price to work its cost per kWh from, and this comparison doesn't quote one. On what you can actually buy today, the SOLIX C2000 Gen 2 works out at $0.12/kWh over its rated life. If you already own the DELTA 3 1500, the hardware comparison still holds: over its rated life the DELTA 3 1500 delivers about 4,608 kWh and the SOLIX C2000 Gen 2 about 8,192 kWh.
Brand trust
EcoFlow
Ecosystem
The deepest catalogue in portable power, a dozen or more models across the DELTA Pro, DELTA 3 and RIVER 3 lines, plus panels and smart home panels. That breadth is the reason a retired model has somewhere to point: EcoFlow names the DELTA 3 Max as the 1500's successor, and the range is the argument for staying with the brand if the 1500 was what you wanted in the first place.
Support
Polarised, and the polarity looks a lot like luck. Prepaid labels and hassle-free replacements in one column; long waits and refurbished units arriving against new claims in the other. Buying through Costco or Amazon has been the standard hedge, because a retailer's return policy doesn't care which column you land in.
Community
Largest community in the space — Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. At the 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 — flagship paths, not line-wide features.
Worth knowing
EcoFlow offers no parts or service outside warranty. On a current model that's a footnote. On one folded out of the range it's closer to a deadline. The app carries a little history too: advanced features were briefly put behind a subscription in early 2025 before community pushback paused the plan.
Anker
Ecosystem
7-8 SOLIX portable power stations across C-series (compact) and F-series (flagship), plus the X1 home energy system
Support
Anker's reputation was built on no-hassle replacements, and the SOLIX-specific picture is drifting away from it: generic AI-agent responses, and complicated return logistics on heavy units, which ship as hazmat. The parent brand is still strong. The service behind this particular line is trending the wrong way, and that's the honest mark against the unit we're recommending.
Community
Moderate — active Reddit (r/Anker, r/AnkerSOLIXCommunity) and growing. Benefits from Anker's massive consumer electronics brand awareness.
App experience
Rated 4.5/5 iOS (~1,100 ratings) · 4.3/5 Android
Unique strength
The parent brand does real work here. Anker's consumer electronics business is why a first-time buyer trusts a box like this at all, InfiniPower is the cycle-life story behind the 4,000-cycle rating, and dollar-per-watt-hour is where the mid-size SOLIX units have consistently landed well.
Worth knowing
Two real marks against it: firmware updates have removed features without warning, and the expansion ecosystem is smaller than EcoFlow's. If the plan is to grow this into a system over years, we're recommending the brand with fewer parts to grow into, and you should know that before you click.
Analyst note
This is the rare cross-brand page where the brand column is the actual decision. The unit on the left can't be bought, so the real choice is Anker's box against EcoFlow's own replacement for it, and the two brands ask you to trust different things. EcoFlow offers a bigger catalogue and a faster charging story, with a support queue that runs hot and cold and no service at all once warranty ends. Anker offers a household name and a shallower power-station range, with service that used to be its best selling point and no longer is. Buying one good box: Anker. Building a system over years: EcoFlow's range is deeper, and its successor is where to look.
Growth path
DELTA 3 1500
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 1,536Wh.
Accepts up to 500W of solar. Suitable for a 1-2 panel setup.
Generous port selection supports complex multi-device setups.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
SOLIX C2000 Gen 2
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 2,048Wh.
Accepts up to 800W of solar. Suitable for a 1-2 panel setup.
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 — see methodology
Analyst note
Growth only counts if you can still buy in, and the DELTA 3 1500 is no longer sold (EcoFlow points owners to the DELTA 3 Max). That leaves the SOLIX C2000 Gen 2: it starts at 2,048Wh and takes Anker expansion batteries, so the ceiling moves if your needs do. The DELTA 3 1500's expandability still matters if you already own one, but it isn't a reason to pick it over the SOLIX C2000 Gen 2.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 1500
Field evidence on the DELTA 3 1500 specifically is thin enough that it has to be said before anything else: our research turned up no Reddit threads, YouTube comments or Amazon reviews tied to this exact 1,536Wh SKU, and the two DIY Solar Forum threads that do discuss it wouldn't load directly, so what follows is paraphrase of indexed snippets rather than quoted ownersA0. Some of that scarcity is the retirement doing its work, since coverage redirects away from a unit nobody sellsA0.
What does exist isn't flattering, and it comes from essentially one thread, which is the caveat that matters more than the content. A poster described a neighbour going through three failed 1500s in roughly eight monthsA1, and the surrounding discussion leaned toward the DELTA 3 line drawing more failure reports than the older DELTA 2A2. The same thread characterised the 1500 as a hybrid, with DELTA 2 UPS-cutover electronics in a new case and what one poster called larger grade B cellsA3. Two open questions ran alongside. Idle draw for the line was argued between roughly 25-30W and a firmware-patched 17W with nobody sure the 1500 got the fix, and our researcher flagged that entry as possibly describing a sibling model, so take it as character rather than specA4. And forum discussion put the 1500's cutover at 15ms while pegging other DELTA 3 variants under 10ms, which at least matches the rating our record carriesA5.
“Posters described the Delta 3 1500 as essentially a Delta 2/Delta 3 hybrid — UPS-cutover electronics carried over from the Delta 2, housed in a new case with what one called "larger grade B cells."”
Sources
diysolarforum.com
Anker SOLIX C2000 Gen 2
The C2000 Gen 2's record is the mirror image: plenty of coverage, almost uniformly positive, and none of it long-term. Our ledger is built from hands-on review sites rather than owner forums, with no reports past the six-month mark retrieved this passB0. So what follows is first-impressions quality. Very good first impressions, but first impressions.
The consistent note is quiet. One review found the fans never rising above a backgrounded whirr and touching about 35 dB at a metre only occasionally under high loadB1, which sits near the 30dB Anker publishes rather than wildly above it. Reviewers also liked the plainness of the thing: no firmware ritual, no odd voltage behaviour, turn it on and plug inB2, with the Solix app treated as a decent monitoring layer over Bluetooth or Wi-Fi rather than a requirementB3. One called it among the most attractive 2 kWh stations on the marketB4, and another noted the Gen 2 shed a large amount of weight against the original C2000B5, which is worth holding onto when 41.7 lbs looks heavy next to 36 on this page.
“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
- Forum posters flagged the Delta 3 1500 as less reliable than EcoFlow's earlier Delta 2, both from direct failure reports and from its unusual hybrid Delta 2/Delta 3 hardware platform. [DELTA 3 1500 · 3 entries]
- Idle power draw and UPS cutover time are both discussed as possible regressions or open questions relative to the standard Delta 3 / Delta 3 Plus, without firm confirmation for the 1500 variant specifically. [DELTA 3 1500 · 2 entries]
- Reviewers consistently praise quiet operation, fast charging, premium build, and no-fuss plug-and-play simplicity. [SOLIX C2000 Gen 2 · 3 entries]
- A1
“A poster's neighbor had three separate Delta 3 1500 units fail on him over roughly eight months.”
diysolarforum.com — "Ecoflow Delta 3 1500 (the newer one), refurbed from EF for $360pt, shipped free" · 2026-02 · [negative]
- A2
“Forum consensus leaned toward the Delta 3 line seeing more failure reports than the Delta 2 — one poster said their two Delta 2 units never gave them a single issue by comparison.”
diysolarforum.com — "Ecoflow Delta 3 1500 (the newer one), refurbed from EF for $360pt, shipped free" · 2026-02 · [negative]
- A3
“Posters described the Delta 3 1500 as essentially a Delta 2/Delta 3 hybrid — UPS-cutover electronics carried over from the Delta 2, housed in a new case with what one called "larger grade B cells."”
diysolarforum.com — "Ecoflow Delta 3 1500 (the newer one), refurbed from EF for $360pt, shipped free" · 2026-02 · [mixed]
- A4
“Idle power draw for the Delta 3 line was debated — some cite roughly 25-30W, others said a firmware update cut it from about 40W to 17W — and posters weren't sure whether the 1500 specifically had received that fix.”
diysolarforum.com — "EcoFlow Delta 3 1500? Any user experiences" and "...refurbed from EF for $360pt" threads · 2026-02 to 2026-03 · [mixed]
- A5
“The Delta 3 1500's UPS cutover was pegged at 15ms in forum discussion, versus a sub-10ms cutover reported for the standard Delta 3 and Delta 3 Plus.”
diysolarforum.com — "EcoFlow Delta 3 1500? Any user experiences" · 2026-03 · [mixed]
- B1
“Even at full power it's far quieter than any other powerful Anker station tested — the fans never rise above a subdued, easily-backgrounded whirr, working largely silently and only occasionally reaching a pleasantly quiet ~35 dB at 1 m under high load.”
notebookcheck.net / thesolarlab.com — Anker SOLIX C2000 Gen 2 review · 2026 · [positive]
- B2
“Really simple to use — no need to download firmware or deal with weird voltage drops; you just turn it on, plug in, and go. Rapid charging and premium build.”
trustedreviews.com / thesolarlab.com — Anker SOLIX C2000 Gen 2 review · 2026 · [positive]
- B3
“The Anker Solix app is a good way to monitor the station during charging and use over Bluetooth or Wi-Fi; reviewers appreciated the monitoring functionality.”
androidguys.com — Anker SOLIX C2000 Gen 2 review · 2026 · [positive]
- B4
“Delivers a convincing performance with few points of criticism — undoubtedly one of the most attractive 2 kWh power stations on the market.”
notebookcheck.net — Anker SOLIX C2000 Gen 2 review · 2026 · [positive]
- B5
“Substantially lighter than its predecessor — the Gen 2 shed a large amount of weight versus the original C2000, making it notably easier to carry for its capacity.”
notebookcheck.net — '11.6 kg lighter than its predecessor' review · 2026 · [positive]
Research compiled September 19, 2026.
Who Should Buy Which
Buy the DELTA 3 1500 if you…
- →You already own one. Nothing on this page should push you to replace it: 1,536Wh, 1,800W continuous and a 3,600W surge still cover a CPAP night, a workday and a tailgate with room to spare, and at 36 lbs it's the easier carry of the two. This comparison is for sizing your next purchase, not for regretting your last one.
- →You've found leftover retail stock and want to know what's in the box. A 36 lb unit that starts anything under 3,600W, runs six AC outlets and four USB-A, takes 500W of solar, carries five years on our record, and has no parts or service path from EcoFlow once that term is up. Judge it on those terms if you like. We can't recommend it, because it isn't a thing you can reliably buy.
Buy the SOLIX C2000 Gen 2 if you…
- →The blackout buyer. 1,741Wh of usable energy clears the 1,645Wh eight-hour profile with 96Wh left over, and an 800W solar ceiling puts most of it back in a morning of decent sun.
- →The person with a trailer in the driveway. The 30A outlet plugs into the shore cord already coiled in your storage bay, which turns one cable into the entire hookup instead of a nest of extension cords.
- →The person sleeping next to it. 30dB is a published figure rather than a measurement, but it's the only figure on this page, and the reviewed behaviour under load backs it upB1.
- →Anyone who wants this decision to stay simple. Six AC outlets, two 140W USB-C ports, a 4,000-cycle rating, five years of cover, and it's the one of the two you can actually put in a cart.
If neither fits
Skip both if your day looks like the van-life profile. 4,685Wh a day against 2,048Wh of battery isn't a gap expansion closes gracefully, and a 41.7 lb suitcase was never going to be a house battery. You want a proper battery bank wired into the vehicle, or two of these and a written plan. And if you're here because you specifically wanted the 1500 and would rather stay with EcoFlow, close this tab: the DELTA 3 Max is the successor EcoFlow names, and that's the comparison you should be reading instead of this one.
The Bottom Line
Buy the Anker SOLIX C2000 Gen 2, because it's the only one of these two you can buy and because it would have been the pick regardless. 2,048Wh against 1,536Wh is the difference between finishing an eight-hour outage and stopping 339Wh short of it, and the 800W solar ceiling means the bigger battery is also the quicker one to refill. Those two facts pull in the same direction, which is rarer than it sounds.
The DELTA 3 1500 was a good 36 lb box and still is, for whoever owns one. But a discontinued unit can't be a recommendation at any confidence level, and the one thing it clearly wins, 5.7 lbs of carry, isn't reason enough to chase leftover stock with no service path behind it. If you want EcoFlow rather than Anker, go read the DELTA 3 Max. If you want the better box of the two actually in front of you, it's the Anker, and it isn't close.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the EcoFlow DELTA 3 1500 discontinued?
Yes. EcoFlow has folded it out of its range, and our record carries it as retired with the DELTA 3 Max named as the successor. You may still find leftover retail or secondhand units, and every spec on this page stays accurate for those, but there's no new-from-EcoFlow path to one and no price shown for it here.
Should I buy a leftover DELTA 3 1500 or the Anker SOLIX C2000 Gen 2?
The Anker. You'd be comparing a 4,000-cycle battery that starts at cycle zero against a 3,000-cycle battery with an unknown number already spent, on a model EcoFlow no longer supplies parts or service for once the warranty term ends. The 512Wh of extra capacity and the 800W solar ceiling are the practical reasons; the service path is the one that bites two years in.
Which one gets a fridge and a few lights through an 8-hour outage?
The SOLIX C2000 Gen 2. That profile draws 1,645Wh, and after the flat 85% usable derate the Anker has 1,741Wh to give, finishing with 96Wh left. The DELTA 3 1500's 1,306Wh usable runs out 339Wh short, about 79% of the way through. Both units start every load involved, so it's endurance rather than starting power that separates them here.
Is the C2000 Gen 2 quiet enough to sleep next to?
Probably, and it's the only one of the two you can check before buying. Anker publishes 30dB, a spec-sheet figure rather than a measurement, and a hands-on review found the fans staying at a backgrounded whirr and reaching about 35 dB at a metre only under high load. A CPAP pulls roughly 40W, which is nowhere near high load for a 2,400W inverter. EcoFlow published no noise figure for the 1500 and, now that it's retired, never will.
The DELTA 3 1500 has a 2x surge ratio and the Anker only 1.7x, so isn't the EcoFlow the better starter?
No. The ratio compares each inverter to itself, and doubling 1,800W still lands 400W below the Anker's 4,000W ceiling. A compressor asks for a number of watts at switch-on, not a multiple of somebody's rating, so the higher ceiling is what starts more things. The ratio does say something true but narrow: relative to its own peak, the EcoFlow's continuous rating sits lower, at 1,800 of 3,600W against 2,400 of 4,000W.
Where to buy
EcoFlow DELTA 3 1500
No longer sold
Anker SOLIX C2000 Gen 2Pick
Sold on Amazon · today’s price is on the listing
Prices may vary by retailer and are subject to change.