Head-to-head test
EcoFlow DELTA 3 Ultra Plus vs Anker SOLIX C1000 Gen 2
The C1000 Gen 2 comfortably covers a CPAP night or a tailgate party, but ask it for a weekend of camping or an extended blackout and it comes up short — the DELTA 3 Ultra Plus closes that gap for $949 more and 52.3 more pounds to carry.
Full profiles: EcoFlow DELTA 3 Ultra Plus → · Anker SOLIX C1000 Gen 2 →
Looking for a different matchup? EcoFlow DELTA 3 Plus vs Anker SOLIX C1000 Gen 2
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
$1,599.00 · direct from EcoFlow
Last checked 3 days ago. Prices move — check before you buy.
$529.99 · direct from Anker
Last checked 3 days ago. Prices move — check before you buy.
Spec deltas
The DELTA 3 Ultra Plus holds 3,072Wh. The C1000 Gen 2 holds 1,024Wh, almost exactly a third of that. An 8-hour blackout draws about 1,645Wh: the Ultra Plus covers it using 63% of its tank and has runway left when the power comes back, while the C1000 Gen 2 would need 189% of what it holds — it's out well before the outage is.
None of that capacity is free. The Ultra Plus costs $1,499 against the C1000 Gen 2's $549.99, and weighs 77.2 lbs to the C1000 Gen 2's 24.9 — more than triple. Oddly, the bigger unit is still the better rate: $0.49 per Wh against $0.54, so you're not paying a premium for the extra capacity. You're paying for capacity a lot of real days simply don't use.
Run all six scenarios and the split is clean, not close. The C1000 Gen 2 covers a CPAP night at 37% of its tank and a tailgate spread at 77% — both real trips, both fine on the small unit. Ask it for a weekend of camping, an extended blackout, or a full remote workday and it's past 100% every time, needing anywhere from 105% to 241% of what it actually holds. The Ultra Plus clears all five. That's the actual question this page answers: not which unit is 'better,' but which side of that line your typical day falls on.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
There's no scenario here where the C1000 Gen 2 almost makes it and the DELTA 3 Ultra Plus barely wins. It's either comfortably enough or genuinely short, with nothing in between — the two units are sized for different jobs, not different tiers of the same job.
C1000 Gen 2 usable capacity covers CPAP Overnight (37% used) and Tailgate Party (77% used) — both under 100%C1000 Gen 2 falls short of Remote Workday (105%), 8-Hour Blackout (189%), and Weekend Camping (241%) — all over 100%
Why it mattersIf your heaviest real day tops out at a CPAP night or a tailgate spread, the C1000 Gen 2 already does the job — the DELTA 3 Ultra Plus's extra capacity above that point is capacity you were never going to use.
Capacity
That makes the $949 gap easy to misread as the Ultra Plus being overpriced. It isn't — it's underpriced per Wh relative to the C1000 Gen 2. What that $949 actually buys is 2,048Wh of extra capacity at a slight discount per unit, not a markup.
DELTA 3 Ultra Plus: $0.49 per Wh upfront, 3,072Wh capacity, $1,499 priceC1000 Gen 2: $0.54 per Wh upfront, 1,024Wh capacity, $549.99 price
Why it mattersDon't let the 'better rate' argument talk you into the bigger unit on its own. It only pays off if you actually draw down that extra 2,048Wh; otherwise you're financing headroom you won't use.
24.9 lbs is one-hand-into-the-trunk weight. 77.2 lbs is bent-knees, plan-the-route, maybe-a-second-person weight, every time you move it, not just on setup day.
DELTA 3 Ultra Plus: 77.2 lbsC1000 Gen 2: 24.9 lbs
Why it mattersIf you're the one hauling this in and out of a truck bed or up basement stairs on a regular basis, the C1000 Gen 2's 24.9 lbs is worth choosing even for a scenario where the Ultra Plus technically has more headroom.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: Capacity-class mismatch, not a close contest — which of six real scenarios each tank clears is the actual decision, not an overall score.
The two scenarios the C1000 Gen 2 wins outright share a shape: they're the lightest single-session draws tested, 320Wh for a CPAP night and 670Wh for a tailgate afternoon. The three it loses need 910Wh, 1,645Wh, or 2,100Wh — a full workday, a real blackout, a full weekend — and none of those are close; the nearest miss still needs 105% of the C1000 Gen 2's usable capacity.
That's a cleaner split than most capacity match-ups offer. There's no scenario here where the C1000 Gen 2 almost gets there, and none where the DELTA 3 Ultra Plus barely wins — it's either comfortably enough or genuinely short. Match your heaviest real day against that list of six numbers, not against which unit has the bigger spec sheet, and the decision more or less makes itself.
Lifetime Value
Selected because: Sticker price makes the Ultra Plus look expensive, but cost-per-Wh and cost-per-lifetime-kWh both favor it slightly — worth separating from the $949 upfront gap.
$1,499 against $549.99 looks like the DELTA 3 Ultra Plus is the expensive choice, and by the sticker it is — $949 more to put down today. Amortized over what each unit actually delivers, the gap almost disappears: both are rated for 4,000 cycles, so the Ultra Plus's 3,072Wh tank works out to 12,288 kWh over its life against the C1000 Gen 2's 4,096 kWh, putting lifetime cost at $0.12 per kWh for the Ultra Plus against $0.13 for the C1000 Gen 2 — a penny apart. Cost per warranty year tells a plainer version of the same story: $300 a year on the Ultra Plus, $110 a year on the C1000 Gen 2, both backed by an identical 5-year warranty.
None of that changes what actually leaves your bank account today. A penny-per-kWh edge over a unit's entire lifespan doesn't offset a gap paid in full on day one — it just means the Ultra Plus isn't the 'expensive' option lifetime math would suggest, and the C1000 Gen 2 isn't cheap so much as sized for less. Settle capacity fit first and let this be the tiebreaker, not the headline.
Portability & Form Factor
Selected because: 77.2 lbs vs 24.9 lbs is a firing gotcha and a real day-to-day cost of the bigger unit's capacity, not just a spec-sheet line.
weight
77.2 lbs and 24.9 lbs aren't just two numbers on a spec sheet. They're two different relationships with the unit. At 24.9 lbs, the C1000 Gen 2 is one-hand-into-the-trunk weight. At 77.2 lbs, the Ultra Plus is bent-knees, maybe-a-second-person weight — more than triple the C1000 Gen 2's mass for exactly 3x the capacity, so the weight scales right alongside the tank, unlike the price.
That's not a reason to avoid the Ultra Plus. Plenty of buyers set it up once, in a garage or an RV bay, and never move it again. It is a reason to be honest about the use case before buying it for anything that gets loaded and unloaded regularly — tailgates, camping trips, a unit that migrates between the house and the truck. For that kind of use, the C1000 Gen 2's 24.9 lbs can be worth choosing even when the Ultra Plus technically has more headroom.
What the Specs Don't Tell You
Selected because: Surge headroom (2x vs 1.5x) and identical 5-year warranties at very different cost-per-year round out the case for a reader still on the fence.
The Ultra Plus's inverter surges to 7,200W against a 3,600W continuous rating, exactly double. The C1000 Gen 2 surges to 3,000W against 2,000W continuous, 1.5 times. Compressor loads — fridges, window ACs — spike 2 to 3 times their rated draw at startup, so the Ultra Plus is carrying more margin for that spike than the C1000 Gen 2 is.
Warranty is simpler: both units carry an identical 5-year term, so that part of the decision is already a wash. The only difference is what you paid to get it — $300 a year against $110. Neither of these two points should move a buyer who's already decided on capacity grounds; they matter most to the reader sitting right at the line, deciding whether to round up or down.
Strengths & trade-offs
EcoFlow DELTA 3 Ultra Plus
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$1,069) than the SOLIX C1000 Gen 2.
- –Significantly heavier (+49.4 lbs), making it harder to move.
Anker SOLIX C1000 Gen 2
Strengths
- +Costs $1,069 less
- +Lighter by 49.4 lb
Trade-offs
- –Weaker inverter (-1,600W) 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 3 Ultra Plus
A weekend of camping draws about 2,100Wh. The DELTA 3 Ultra Plus uses 80% of its tank and stays well inside it; the C1000 Gen 2 would need 241% of what it holds — not a close call, a different category of trip.
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 3 Ultra Plus
An 8-hour blackout draws about 1,645Wh. The Ultra Plus uses 63% of its tank and still has runway when the power comes back; the C1000 Gen 2 would need 189% of what it holds — it's out well before the blackout is over.
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
DELTA 3 Ultra Plus
A CPAP night draws about 320Wh — 12% of the Ultra Plus's tank, 37% of the C1000 Gen 2's. Both sail through on capacity alone, so the real tiebreaker two feet from your head is the fan: the C1000 Gen 2 is spec'd at 35dBA against the Ultra Plus's 30dBA.
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 3 Ultra Plus
A remote workday pulls about 910Wh. The Ultra Plus spends 35% of its tank and clocks out with plenty left; the C1000 Gen 2 needs 105% of its usable capacity — a workday that ends with the laptop dying before you do.
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 3 Ultra Plus
A tailgate setup draws about 670Wh — 26% of the Ultra Plus's tank, 77% of the C1000 Gen 2's. Both make it through the game; the C1000 Gen 2 just does it with a lot less left in reserve if the party runs long.
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
Van life's daily draw runs about 4,685Wh — more than either tank alone, needing 179% of the Ultra Plus's usable capacity and 538% of the C1000 Gen 2's. Neither wins this one as-is; it's a job for expansion batteries or a different category, not a reason to pick between these two.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: DELTA 3 Ultra Plus runs 12.7h vs 4.2h.
$1,599 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 0–174.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–34.8hHigh-Draw Appliances
These reveal the real limitsscale 0–2.6h¹ 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 1, 2026
Verdict: the DELTA 3 Ultra Plus, on Power Score margin
Buy the DELTA 3 Ultra Plus if your real usage includes an extended blackout, a full remote workday, or a weekend of camping. It clears all three with real margin — 63%, 35%, and 80% of its tank respectively — while the C1000 Gen 2 can't finish any of them. Buy the C1000 Gen 2 instead if your heaviest single day tops out at a CPAP night or a tailgate spread: both fit with room to spare, 37% and 77% used, and you keep 52.3 fewer pounds off your back every time you move it. Neither is the pick for daily van life — both fall well short of a full day on the road, and that calls for expansion batteries, not a choice between these two units.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of August 1, 2026. The links below open EcoFlow's and Anker's current prices.
$1,599.00 · direct from EcoFlow
Last checked 3 days ago. Prices move — check before you buy.
or check the SOLIX C1000 Gen 2 price$529.99 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated August 1, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): CPAP, 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 3 Ultra Plus rates 4.9/5 (92nd percentile of 25 Large-class units), and SOLIX C1000 Gen 2 rates 4.9/5 (96th percentile of 26 Everyday-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
77.2 Lbs Is a Two-Hands Lift
The Ultra Plus weighs 77.2 lbs — more than triple the C1000 Gen 2's 24.9 lbs. That's bent-knees, plan-the-route weight, not something you swing into a truck bed solo. The C1000 Gen 2, by contrast, you pick up like a case of water.
Surge Headroom: 2x Beats 1.5x
The Ultra Plus's inverter surges to 7,200W against a 3,600W continuous rating — exactly double. The C1000 Gen 2 surges to 3,000W against 2,000W continuous, 1.5 times. Compressor loads like fridges and window ACs spike 2 to 3 times their rated draw at startup, so the Ultra Plus carries more margin for that spike.
Same 5 Years, Different Bill
Both units carry a 5-year warranty, but that coverage costs $300 a year on the Ultra Plus's $1,499 price and $110 a year on the C1000 Gen 2's $549.99. The warranty term is identical; the price of getting it isn't.
Full record above — the Test Desk pick is the DELTA 3 Ultra Plus.
Check DELTA 3 Ultra Plus price →or check the SOLIX C1000 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 cost the same to own over their rated lives — $0.13/kWh each. Lifetime cost can't separate them, so decide on the sticker price and everything else. 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 — the wear horizon is identical and decides nothing here.
Brand trust
EcoFlow
Ecosystem
Largest in portable power — 12-15 models across DELTA Pro, DELTA 3, and RIVER 3 series, plus solar panels and smart home panels
Support
US-based phone/email/chat support (1-800-368-8604). Experiences are polarized — many report hassle-free prepaid-label replacements, but others report long waits and refurbished units sent for new claims. Pro tip: buying from Costco or Amazon gives you a stronger return safety net.
Community
Largest community in the space — Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. At the very top of the range, the DELTA Pro Ultra platform stacks batteries and inverters into whole-home backup — a flagship path, not a line-wide feature.
Worth knowing
Tested subscription paywalls for advanced app features in early 2025 before community backlash paused the plan. No parts or service offered out of warranty.
Anker
Ecosystem
7-8 SOLIX portable power stations across C-series (compact) and F-series (flagship), plus the X1 home energy system
Support
US-based support. Historically known for incredible no-hassle replacements, but recent reports describe AI-driven support agents giving generic responses and complex return logistics for heavy units (hazmat shipping). The Anker brand reputation is still strong, but SOLIX-specific support quality is trending down.
Community
Moderate — active Reddit (r/Anker, r/AnkerSOLIXCommunity) and growing. Benefits from Anker's massive consumer electronics brand awareness.
App experience
Rated 4.5/5 iOS (~1,100 ratings) · 4.3/5 Android
Unique strength
Parent brand trust from Anker's consumer electronics dominance. InfiniPower technology for long cycle life. Strong $/Wh value in the mid-size and larger units — the S2000, F2600 and C1000 are among the better buys per watt-hour in the catalog.
Worth knowing
Support quality appears to be declining from its historically excellent level. Firmware updates have removed features without warning. Expansion ecosystem is smaller than EcoFlow's.
Analyst note
Anker's own read on its lineup names the C1000 Gen 2 specifically as one of its better buys per watt-hour, and the numbers here back that up: $0.54 per Wh isn't far off the Ultra Plus's $0.49. EcoFlow's bigger catalog and faster charging tech show up in the Ultra Plus's spec sheet, but this pairing reads less like a brand-quality gap and more like a capacity-class one — judge these two units on what they hold, not on which logo is on the case.
Growth path
DELTA 3 Ultra Plus
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,072Wh.
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 C1000 Gen 2
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 1,024Wh.
Accepts up to 600W of solar. Suitable for a 1-2 panel setup.
Generous port selection supports complex multi-device setups.
Expansion batteries are Anker-specific. You're investing in the Anker ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, but the DELTA 3 Ultra Plus's higher solar ceiling (1,600W vs 600W) 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 3 Ultra Plus
The Ultra Plus is new enough that what's here comes mostly from professional and enthusiast reviewers running short-term tests, not owners with months of forum threads behind themA9A11 — treat it as informed first impressions rather than a long-term verdict. Where reviewers agree: the fan runs notably quiet even under heavy load, with one outlet measuring it at under 25dB and comparing the noise to EcoFlow's flagship DELTA Pro UltraA1A2A13. One reviewer ran an eight-hour remote workday off it — laptop, desktop workstation, and monitors — and still had 40% of the battery left at the endA5.
Pass-through and UPS behavior checked out clean in testing too: no output throttling tied to input wattage, and no dip when the reviewer unplugged it from the wallA4A6. The gripes are minor and specific rather than widespread — one reviewer flagged that the unit shuts down its 30A port first when overloadedA3, and another noted the screen washes out in direct sunA7. Weight and the original MSRP both draw consistent criticism, but reviewers are clear that a heavily discounted street price shifts the value equation substantially in the Ultra Plus's favorA9A10A11. Build quality is repeatedly called substantial rather than cheap or fragileA8A14.
“even when you're pushing it hard, the DELTA 3 Ultra Plus runs much quieter than older EcoFlow models, like the DELTA 2 Max”
Sources
thesolarlab.com · postperspective.com · appleinsider.com · digitaltrends.com · storagereview.com
Anker SOLIX C1000 Gen 2
Owner and reviewer sentiment on the C1000 Gen 2 is more consolidated. The standout claim is charge speed: HyperFlash charging gets it from empty to full in roughly 49 minutes, a real step up from the original C1000's 58-80 minutesB1. The higher output is also called out as crossing a meaningful line over the original model — enough to run a standard 1,500W space heater with headroom leftB3. More than one reviewer calls it the mid-size unit to beat this yearB4.
The recurring complaint is fan noise under load: nearly silent at low draw, around 35dB under 200W, but climbing to roughly 55dB once fast charging or heavy output kicks inB2. That's the one thing to know going in if you pictured a silent box — it's quiet only some of the time, not all of it.
“Fast HyperFlash charging — a full recharge in roughly 49 minutes, noticeably quicker than the original C1000's ~58-80 minutes.”
Sources
thepowerpick.com · macrumors.com · outdoorgearlab.com · technerdo.com · mensjournal.com · powerstationadvisor.com
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Professional reviewers consistently describe the fan noise as very quiet even under heavy load, comparable to EcoFlow's premium DELTA Pro Ultra line. [DELTA 3 Ultra Plus · 3 entries]
- Reviewers report solid UPS/pass-through charging performance with no noticeable switchover issues or output throttling tied to input wattage. [DELTA 3 Ultra Plus · 2 entries]
- The unit's high weight (~74 lbs) and premium MSRP are repeatedly flagged as drawbacks, though discounted street pricing is seen as making the value proposition much stronger. [DELTA 3 Ultra Plus · 3 entries]
- Build quality/durability is praised as substantial and non-fragile across multiple independent reviews. [DELTA 3 Ultra Plus · 2 entries]
- Fast charging and higher output over the original are the standout gains; fan noise under load or fast charging is the top complaint. [SOLIX C1000 Gen 2 · 3 entries]
- A1
“even when you're pushing it hard, the DELTA 3 Ultra Plus runs much quieter than older EcoFlow models, like the DELTA 2 Max”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · unknown · [positive]
- A2
“we'd probably say the noise it creates is similar to what you hear when you run the DELTA Pro Ultra, which is pretty amazing”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · unknown · [positive]
- A3
“One weird thing we noticed was the fact that the unit always seems to shut down the 30A port first when you overload the unit”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · unknown · [mixed]
- A4
“Many power stations limit you to the input wattage when outputting power, but this EcoFlow power station does not”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · unknown · [positive]
- A5
“I was able to work remotely for an eight-hour day with 40% power left, which included running my laptop, desktop workstation and monitors”
postperspective.com — Review: EcoFlow Delta 3 Ultra Plus Portable Power Station · 2026-04 · [positive]
- A6
“I didn't experience any shut-offs or dips when I unplugged the EcoFlow from the wall”
postperspective.com — Review: EcoFlow Delta 3 Ultra Plus Portable Power Station · 2026-04 · [positive]
- A7
“while facing the sun, I had to employ the classic "cup hands cover" maneuver to get a clear look at the screen status”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11 · [mixed]
- A8
“It does not feel cheap or fragile. Everything from the outer shell case to the plastic buttons and the AC cable feels substantial and durable”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11 · [positive]
- A9
“Weighing in at a thunderous 74 pounds, the Ultra is not considered lightweight by any standards”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11 · [mixed]
- A10
“Where it falls short is in price justification at its $2,899 MSRP”
digitaltrends.com — EcoFlow DELTA 3 Ultra Plus Review: Portability meets serious firepower · unknown (approx. 1 week old at capture) · [negative]
- A11
“At the heavily discounted street price of around $1,499–$1,599, the value equation shifts dramatically in the Ultra Plus's favor”
digitaltrends.com — EcoFlow DELTA 3 Ultra Plus Review: Portability meets serious firepower · unknown · [positive]
- A13
“Each unit operates quietly at under 25dB, remaining unobtrusive even during sustained loads”
storagereview.com — EcoFlow DELTA 3 Max Plus & Ultra Plus Review · 2025-09-30 · [positive]
- A14
“the Delta 3 Ultra Plus can withstand drops of up to 0.2m, and both models feature moisture resistance to mitigate risks from overnight dew”
storagereview.com — EcoFlow DELTA 3 Max Plus & Ultra Plus Review · 2025-09-30 · [positive]
- B1
“Fast HyperFlash charging — a full recharge in roughly 49 minutes, noticeably quicker than the original C1000's ~58-80 minutes.”
thepowerpick.com / macrumors.com — Anker SOLIX C1000 Gen 2 review · 2026 · [positive]
- B2
“Fan noise is the single most common complaint — nearly silent at low load (about 35 dB under 200W), but the fans ramp up audibly during fast charging or heavy output, reaching around 55 dB at 1,000W-plus.”
outdoorgearlab.com / technerdo.com — C1000 Gen 2 review · 2026 · [negative]
- B3
“The higher continuous output crosses a useful threshold over the original — enough to run a standard 1,500W space heater with headroom to spare.”
thepowerpick.com / mensjournal.com — C1000 Gen 2 review · 2026 · [positive]
- B4
“Reviewers describe it as a refined, powerful, fast-charging update to a popular 1kWh platform, widely rated the mid-size unit to beat in 2026.”
thepowerpick.com / powerstationadvisor.com — C1000 Gen 2 review · 2026 · [positive]
Research compiled August 1, 2026.
Who Should Buy Which
Buy the DELTA 3 Ultra Plus if you…
- →Buy the DELTA 3 Ultra Plus if your worst real day is an extended blackout, a full remote workday running a laptop and monitors, or a weekend of camping. It clears all three with real margin — 63%, 35%, and 80% of its tank respectively — while the C1000 Gen 2 can't finish any of them.
- →It's also the better deal per watt-hour despite the bigger bill: $0.49 against the C1000 Gen 2's $0.54. The extra 2,048Wh over the C1000 Gen 2 is capacity you'll actually draw down in any of those scenarios, not capacity you're carrying around unused.
Buy the SOLIX C1000 Gen 2 if you…
- →Buy the C1000 Gen 2 if the heaviest thing you'll ever ask it for is an overnight CPAP or a tailgate spread. Both fit inside its tank with room to spare — 37% and 77% used — and you'll spend less while carrying a lot less weight every time you move it.
- →It's also the pick if the Ultra Plus's other five scenarios are simply bigger than your life gets. There's no partial-credit version of this decision — paying more for headroom you don't use isn't a better deal, whatever the per-Wh math says elsewhere on this page.
If neither fits
Skip both if your daily draw looks like van life. 4,685Wh a day needs 179% of the Ultra Plus's usable tank and 538% of the C1000 Gen 2's, so neither wins here as-is. That's a job for a bank built around expansion batteries from the start, not a pick between these two.
The Bottom Line
The DELTA 3 Ultra Plus wins this matchup because it's the only one of the two that clears every scenario except van life — an 8-hour blackout, a full remote workday, a weekend of camping, all handled with real margin, not a photo finish.
But that verdict only matters if you need the capacity. The C1000 Gen 2 isn't a lesser version of the Ultra Plus. It's the correct, cheaper answer for anyone whose heaviest day is a CPAP night or a tailgate spread, and it gets there at a third of the weight. Buy the size you'll actually use, not the one that wins on paper.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Anker SOLIX C1000 Gen 2 big enough for a power outage?
Only for a short one. The C1000 Gen 2 covers a light overnight load like a CPAP fine, using just 37% of its tank. A full 8-hour blackout at typical household draw needs about 1,645Wh — 189% of the C1000 Gen 2's usable capacity — so it runs out before the outage is over. The DELTA 3 Ultra Plus covers the same 8 hours using just 63% of its tank.
Why is the DELTA 3 Ultra Plus so much more expensive than the C1000 Gen 2?
Mostly capacity. The Ultra Plus holds 3,072Wh against the C1000 Gen 2's 1,024Wh — almost exactly three times as much — for $1,499 against $549.99. It's actually the better rate per watt-hour, $0.49 against $0.54, so you're not paying a markup for the extra capacity, you're paying for capacity itself. Whether that $949 gap is worth it comes down to whether you need the extra 2,048Wh.
Can I run a CPAP machine all night on the Anker SOLIX C1000 Gen 2?
Yes. A CPAP night draws about 320Wh, only 37% of the C1000 Gen 2's usable capacity, with plenty to spare. The DELTA 3 Ultra Plus handles the same load at 12% of its much bigger tank, but that extra headroom doesn't matter for a device this light — both units hold more capacity than a CPAP alone needs.
How much heavier is the DELTA 3 Ultra Plus than the C1000 Gen 2?
52.3 lbs heavier — 77.2 lbs against 24.9 lbs, a bit more than triple. That's the practical cost of the Ultra Plus's 3x capacity advantage: it's a two-hands lift you plan around, while the C1000 Gen 2 is light enough to move with one hand.
Do both of these power stations expand with add-on batteries?
Yes, both support expansion batteries rather than being sealed at their base capacity. The DELTA 3 Ultra Plus has the stronger off-grid growth path, though: its 1,600W max solar input against the C1000 Gen 2's 600W means it can feed a larger expanded bank faster from panels alone.
Where to buy
EcoFlow DELTA 3 Ultra PlusPick
$1,599.00
$1,599.00 · direct from EcoFlow
Last checked 3 days ago. Prices move — check before you buy.
Anker SOLIX C1000 Gen 2
$529.99
$529.99 · direct from Anker
Last checked 3 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.