Head-to-head test
EcoFlow DELTA Pro 3 vs Anker SOLIX C1000 Gen 2
54 cents a watt-hour against 59: nobody gets a bulk discount here, so the only thing that decides this page is whether your worst night runs past the Anker's 870Wh.
Full profiles: EcoFlow DELTA Pro 3 → · Anker SOLIX C1000 Gen 2 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
$2,799.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
$529.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
The DELTA Pro 3 holds exactly four times what the SOLIX C1000 Gen 2 holds, 4,096Wh against 1,024Wh, and there is no bulk discount for it: 59 cents a watt-hour against 54. So the $2,269 between them ($2,799 against $530) isn't a premium and it isn't a bargain. It's the going rate for watt-hours you either need or don't.
Size the night, not the brand. The blackout load modelled on this page runs 1,645Wh and the Anker has 870Wh usable, so it stops 775Wh short and no amount of careful rationing closes that. The camping load is worse. The workday misses by 40Wh, which is close enough to call a coin flip.
The DELTA Pro 3 wins this page, and it should: it finishes five of the six loads here. Just know what you're signing for. It weighs 112.4 lb, which is a two-person lift and a permanent address in the garage, and if your actual worst night is a laptop, a router, some lights and a CPAP, you'll have bought 4,096Wh to cover a 320Wh evening.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
That kills the usual version of this argument in both directions. You can't call the DELTA Pro 3 overpriced and you can't call the C1000 Gen 2 the value pick, because they cost about the same to own per unit of stored energy. Overbuying isn't a hedge here, it's the 3,072Wh gap between 4,096 and 1,024 sitting idle at full retail.
DELTA Pro 3: $2,799 for 4,096Wh, or 59 cents a watt-hourSOLIX C1000 Gen 2: $530 for 1,024Wh, or 54 cents a watt-hourBoth are rated 4,000 cycles and both carry a 5-year warranty
Why it mattersAnyone shopping this pair on price-per-watt-hour can stop reading the price and go measure their worst night instead.
So the C1000 Gen 2 is a one-day battery that lands right on the line of a full workday and falls off a cliff at anything house-shaped. Two of them, 1,740Wh usable, would only just cover the blackout list and would still miss the weekend.
The C1000 Gen 2's usable figure on this page is 870Wh: its 1,024Wh after the flat 85% derate this site applies to every unitRemote Workday needs 910Wh, leaving it 40Wh short8-Hour Blackout needs 1,645Wh (775Wh short) and Weekend Camping needs 2,100Wh (1,230Wh short)
Why it mattersIf your list is a laptop, phones, a router and lights, the Anker is enough and the workday is a coin flip you'll usually win. Put a household on it overnight and it stops being close.
continuous output
Consolidation is what the DELTA Pro 3 actually sells, and it's the only thing it sells. Not efficiency, since 4,096Wh over 112.4 lb is 36Wh a pound against the Anker's 41 (1,024Wh over 24.9 lb), and not value. What you're buying is all of it behind a single 4,000W inverter, with 120V/240V on the recordA1.
Four SOLIX C1000 Gen 2s come to 4,096Wh exactly (4 x 1,024Wh), $2,200 (4 x $530) and 99.6 lb (4 x 24.9 lb)One DELTA Pro 3 is 4,096Wh, $2,799 and 112.4 lbThe DELTA Pro 3 runs 4,000W continuous and 6,000W peak; the C1000 Gen 2 runs 2,000W and 3,000W
Why it mattersIf your energy needs to be in three places, buy small and buy more than one. If it needs to be in one place at 4,000W, no stack of C1000s gets you there.
solar input
Refill rate is the spec that decides multi-day outages, and it's the one place the DELTA Pro 3's size compounds instead of just sitting there. On panels the gap widens: 2,000W of solar input against 600W means a single good day puts a much bigger tank back in play.
Reviewers time a full DELTA Pro 3 charge at roughly 90 minutes, and 0-80% in about 50 minutes on up to 7,000W of inputA3The C1000 Gen 2's HyperFlash charging is timed at roughly 49 minutes for a full refillB1Solar input ceilings are 2,000W and 600W
Why it mattersOne-night outages and car camping: the Anker's 49-minute wall refill is plenty. Three days without a grid: the refill rate matters more than the capacity.
The specific dimensions that decide these two units — everything else is a tie.
Runtime: Will It Power Your Gear?
Selected because: Everything on this page lands on one side or the other of the C1000 Gen 2's 870Wh of usable energy.
continuous output
870Wh is the number to keep in your head. That's the C1000 Gen 2's 1,024Wh after the flat 85% derate this site applies to both units identically, so it's a fair comparison even though it's a constant rather than a measurement of either box. Above that line you need the DELTA Pro 3's 3,482Wh. Below it you're choosing between two units that will both finish the job, one of which costs $530.
Output tells the same story twice over: 2,000W continuous and 3,000W peak against 4,000W and 6,000W, exactly double on both counts, which leaves both units with the identical 1.5x surge multiple over their continuous rating. Reviewers put the Anker's 2,000W comfortably over a 1,500W space heater with headroom leftB3; the DELTA Pro 3's edge is that it can run that heater and 2,500W of other things at the same time. Both list a 10ms switchover, so neither is the safer landing for a desktop or a CPAP when the grid drops.
Your Life, Your Pick
Selected because: Two of these six loads fit inside the Anker, one misses it by 40Wh, and one is out of reach for both units.
The DELTA Pro 3 wins Weekend Camping and Tailgate Party, and you should read both of those wins with one eye open. Nothing in this scoring model has a column for who carries the unit: the same page that hands the 112.4 lb box a camping trophy also files a warning card telling you it's a two-person lift you'll want to place once and leave alone. Both things are true. Only one of them is about the metric.
Where the scenarios genuinely decide something is the blackout. 1,645Wh needed against 870Wh in hand isn't a rationing problem, it's an arithmetic one, and the DELTA Pro 3 clears it with 1,837Wh left, more than enough to run that same evening again tomorrow. Van Life Daily is the honest floor for both: at 4,685Wh it leaves even the big unit 1,203Wh short and the Anker 3,815Wh short. If that's your daily draw, this page is the wrong page.
Portability & Form Factor
Selected because: 112.4 lb against 24.9 lb decides where each of these lives, and that decides how often you actually use it.
weight
24.9 lb is a one-handed carry to the back seat. 112.4 lb is a bent-knees, two-people, not-on-the-stairs lift, and the honest way to think about it is that you'll do it once, into the garage or the basement or the RV bay, after which it's furniture with a screen. That isn't a knock on the DELTA Pro 3. It's simply what 4,096Wh weighs. It is, though, why plenty of people who'd benefit from the capacity should still buy the small one: a battery you never move is a battery that only exists in one room.
One small reversal worth knowing, since it cuts against the price: the cheap box has the faster laptop port, 140W of USB-C against the DELTA Pro 3's 100W. It changes nothing about the verdict. It's a reminder that the $2,269 is buying watt-hours, not refinement.
Lifetime Value
Selected because: Both are rated 4,000 cycles, so this table can only restate the price tag: worth one read to see that it can't decide anything.
cost / lifetime kWh
Both cells are rated 4,000 cycles, which quietly makes this table decorative. Cost per lifetime kilowatt-hour is the price per watt-hour spread across the same cycle count for both units, so it can't rank them any differently than the sticker already did: 15 cents against 13. Read the years columns with more suspicion still. They're identical, 11 years of daily cycling on both, because that model counts cycles and has no term for capacity at all. One of these boxes holds four times what the other holds and the lifespan estimate cannot see it.
What the table does establish is that neither of these is a disposable purchase. Same 4,000 cycles, same five years of warranty, nothing in the durability column separating them. Choose on size and treat the ownership math as a tie, because that's what it is.
Strengths & trade-offs
EcoFlow DELTA Pro 3
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$2,269) than the SOLIX C1000 Gen 2.
- –Significantly heavier (+87.5 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
Anker SOLIX C1000 Gen 2
Strengths
- +Costs $2,269 less
- +Lighter by 87.5 lb
Trade-offs
- –Weaker inverter (-2,000W) 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
Neither unit
The camping load comes to 2,100Wh, and the C1000 Gen 2 has 870Wh to give. It's 1,230Wh short, which is more than the whole 1,024Wh battery you'd be carrying, so this isn't a stretch-it-out situation. The DELTA Pro 3 covers it and ends the trip with 1,382Wh spare.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
DELTA Pro 3
1,645Wh needed, 870Wh available: the Anker is 775Wh short and the shortfall arrives well before the lights come back. The DELTA Pro 3 finishes the same evening with 1,837Wh still in the tank, which is more than the entire load again, and being able to run tomorrow night too is the actual difference between a battery and a backup.
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 Pro 3
Both clear this one easily, the Anker with 550Wh spare and the DELTA Pro 3 with 3,162Wh, so the win goes to the big unit on nights rather than decibels. 870Wh divided by the 320Wh this night costs is not quite three; 3,482Wh divided by the same is nearly eleven. Ignore the 30dB against 35dB gap while you're deciding, because those are single rated numbers rather than a measurement at a 320Wh overnight load. If your worry is one bad night, the cheaper box already solved it.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
DELTA Pro 3
The Anker misses by 40Wh: 910Wh needed against 870Wh usable, under 5% of its own usable figure and comfortably inside the slop of a flat 85% derate that was never measured on either unit. Treat that as a coin flip rather than a failure, and treat the C1000 Gen 2 as a battery that finishes a work day on fumes. The DELTA Pro 3 ends the same day with 2,572Wh untouched, which is the whole point of four times the capacity.
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 C1000 Gen 2
Both run game day: 670Wh against the Anker's 870Wh leaves 200Wh of slack, and the DELTA Pro 3 packs up with 2,812Wh. The score goes to the big unit on that headroom, but the scoring has no column for who moves 112.4 lb across a parking lot, and at 670Wh headroom is not what game day is short of.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither unit covers this scenario's 4,685Wh: the DELTA Pro 3 comes up 1,203Wh short (about 74% 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
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: DELTA Pro 3 runs 17h vs 4.2h.
$2,799 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 0–232.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–46.4hHigh-Draw Appliances
These reveal the real limitsscale 0–3.5h¹ Runtime = (capacity × 0.85) ÷ appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads — see methodology.
Conclusion
August 9, 2026
Verdict: the DELTA Pro 3, on Power Score margin
Buy the DELTA Pro 3 if your worst night is house-shaped. It's the only unit here that finishes the 1,645Wh blackout load, and it finishes with 1,837Wh still in the tank, which is more than the whole load again and the real test of an outage that runs into a second day. The per-watt-hour price barely moves between these two (59 cents against 54), so you aren't overpaying for the size, you're just paying for it. The catch is worth saying out loud before you click: 112.4 lb makes this a fixture rather than a thing you carry, and if your load list tops out around 870Wh, the SOLIX C1000 Gen 2 does the identical job for $2,269 less ($2,799 against $530) and rides in the back seat.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of August 9, 2026. The links below open EcoFlow's and Anker's current prices.
$2,799.00 · direct from EcoFlow
Last checked 1 day 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 9, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): UPS, CPAP, Tailgating, Apartment Balcony, Camping.
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, DELTA Pro 3 rates 4.0/5 (40th percentile of 16 Home Backup-class units), and SOLIX C1000 Gen 2 rates 4.9/5 (96th percentile of 27 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.
112.4 lb: Pick Its Spot Before You Buy It
112.4 lb is not a lift you do alone, and it's not one you do on stairs. More to the point, it's not one you do twice. Plan on setting the DELTA Pro 3 down once, in the garage or the basement or the RV bay, and treating it as an appliance from then on. The C1000 Gen 2 at 24.9 lb goes into the back seat with one hand. If your use involves stairs, a boat, or a walk from the car, that difference outranks every other line on this page.
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 Pro 3's 1.8, but that spread is the price gap, not the terms.
Full record above — the Test Desk pick is the DELTA Pro 3.
Check DELTA Pro 3 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
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 — 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
X-Stream fast charging and the deepest catalogue in portable power, 12 to 15 models across the DELTA Pro, DELTA 3 and RIVER 3 lines plus panels and a smart home panel. Judge the expansion story by the DELTA Pro 3's own ceiling, not by the headline figures EcoFlow quotes for its much larger platform hardware.
Worth knowing
Three things on file, none of them about this unit specifically. The October 2025 recall covered the DELTA Max 2000 over overheating risk across six incidents, a different model in the same family. EcoFlow tested subscription paywalls for advanced app features in early 2025 and shelved the plan after community backlash. And there are no parts or service offered once the warranty is up, on any of it.
Anker
Ecosystem
7-8 SOLIX portable power stations across C-series (compact) and F-series (flagship), plus the X1 home energy system
Support
US-based support. Historically known for incredible no-hassle replacements, but recent reports describe AI-driven support agents giving generic responses and complex return logistics for heavy units (hazmat shipping). The Anker brand reputation is still strong, but SOLIX-specific support quality is trending down.
Community
Moderate — active Reddit (r/Anker, r/AnkerSOLIXCommunity) and growing. Benefits from Anker's massive consumer electronics brand awareness.
App experience
Rated 4.5/5 iOS (~1,100 ratings) · 4.3/5 Android
Unique strength
Anker's whole pitch is dollars per watt-hour, and the C1000 Gen 2 delivers it: on this page it's the cheaper of the two on exactly that measure, backed by the parent brand's consumer-electronics reputation and InfiniPower cell longevity. What it doesn't have is EcoFlow's breadth, 7 to 8 SOLIX stations against a lineup several times that size.
Worth knowing
Support quality appears to be declining from its historically excellent level. Firmware updates have removed features without warning. Expansion ecosystem is smaller than EcoFlow's.
Analyst note
Two support stories heading the same direction from opposite starting points. Our brand file records EcoFlow's as polarised, prepaid-label replacements for some owners and long waits or refurbished units for others, and Anker's as a historically excellent operation now drawing complaints about scripted replies on the SOLIX line specifically. Neither is a reason to pick, and both improve if you buy through a retailer with its own returns policy. One practical note the file raises on the Anker side applies harder to the EcoFlow: heavy units ship back as hazmat freight, and 112.4 lb is a much worse thing to return than 24.9.
Growth path
DELTA Pro 3
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 4,096Wh.
Accepts up to 2,000W 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 — 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 Pro 3's higher solar ceiling (2,000W 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 Pro 3
The DELTA Pro 3's file is review-desk coverage rather than long-term ownership. What's in it: the 4,096Wh, 4,000W dual-voltage configuration, confirmed against EcoFlow's own listingA1; a LiFePO4 pack rated 4,000+ cycles to 80%A2; charge times of about 50 minutes to 80% and roughly 90 minutes to full on up to 7,000W of inputA3; and reviewers calling it a gold-standard whole-home backup for 2026A4. That is a spec sheet with citations attached. There's nothing here from anyone who has lived with it for a year, no report on what the fans do at 2 a.m. or how the app behaves when the Wi-Fi is down, and I'd rather flag the gap than paper over it.
One small mismatch, since you'll find it if you go looking: the review record puts the unit at about 113.5 lbA4 where our spec table says 112.4. Same lift either way, and both figures describe the DELTA Pro 3 rather than the older DELTA Pro.
“4,096Wh LFP battery with 4,000W continuous AC output (6,000W with X-Boost) and dual-voltage 120V/240V, expandable to 48kWh.”
Sources
ecoflow.com · amazon.com · homedepot.com · thepowerpick.com · outboundpower.com · techradar.com · thesolarlab.com
Anker SOLIX C1000 Gen 2
The C1000 Gen 2's record is more useful, and its single most common complaint is noiseB2. It's quiet at low load, around 35 dB under 200W, and the fans ramp hard during fast charging or heavy output, measured near 55 dB past 1,000WB2. Note what that does to the spec table: the 35 dB printed there is the quiet-load figure, not a number that survives the unit working.
The rest of the file is positive and consistent: a full refill in roughly 49 minutes, noticeably quicker than the original C1000B1; the higher continuous output clearing a 1,500W space heater with room to spareB3; and a general read that this is the mid-size unit to beat this yearB4. Worth naming the asymmetry before it misleads you, though. We have a loud-under-load measurement for the Anker and no equivalent for the DELTA Pro 3, and that's missing data, not a quiet unit.
“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
- Huge 4,096Wh LFP capacity, 4,000W dual-voltage output, very fast charging, and big expandability are the standout praise; it's heavy at ~113 lbs. [DELTA Pro 3 · 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
“4,096Wh LFP battery with 4,000W continuous AC output (6,000W with X-Boost) and dual-voltage 120V/240V, expandable to 48kWh.”
ecoflow.com / amazon.com — DELTA Pro 3 · 2026 · [positive]
- A2
“LiFePO4 rated for 4,000+ cycles to 80% (10+ years), with an IP65 battery rating.”
homedepot.com / thepowerpick.com — DELTA Pro 3 review · 2026 · [positive]
- A3
“Multi-charge technology reaches 0-80% in about 50 minutes using up to 7,000W input, with a full charge in roughly 90 minutes; up to 2,600W solar.”
outboundpower.com / techradar.com — DELTA Pro 3 review · 2026 · [positive]
- A4
“Weighs about 113.5 lbs; reviewers call it a gold-standard whole-home backup unit for 2026.”
techradar.com / thesolarlab.com — DELTA Pro 3 review · 2026 · [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 9, 2026.
What Owners Actually Report
Drawn from 64 comments on independent review channels — not from retailer reviews, which skew to the first week of ownership. Each line is our summary of one commenter's claim, linked to the original. We record what they said, including where it contradicts the spec sheet.
EcoFlow DELTA Pro 3
74 claims from 50 comments · 50 from owners · 22 with figures
- Charging
- 8 · 30% negative
- Runtime
- 7 · 0% negative
- Price & value
- 11 · 3% negative
- Expandability
- 7 · 97% negative
- Warranty & support
- 8 · 69% negative
What owners complain about
His DP3 can only charge from an external 120V source while outputting 240V.
Chargingowner7 agreedsource →
At almost 120 lb he would not call the DP3 portable.
Size & weightmeasuredowner3 agreedsource →
Regrets buying the DP3 over the F3800 because it lacks 240V passthrough.
Expandabilityowner4 agreedsource →
What owners praise
Recharges in about 70 minutes at 3400W from a 240V generator inlet.
Chargingmeasuredowner57 agreedsource →
Ran lights, fans, modem, fridge and a 1300W air conditioner through a 5-day hurricane outage.
Runtimemeasuredowner30 agreedsource →
Costco sells a DELTA Pro 3 twin pack at $4,999, dropping to $4,499 on sale.
Price & valuemeasuredowner6 agreedsource →
Anker SOLIX C1000 Gen 2
22 claims from 14 comments · 18 from owners · 6 with figures
- Price & value
- 4 · 0% negative
- Runtime
- 3 · 15% negative
- UPS switchover
- 2 · 0% negative
- Inverter & surge
- 1 · 0% negative
- Solar input
- 1 · 0% negative
What owners complain about
Gen 2 loses the gen 1's ability to add an expansion battery.
Expandability23 agreedsource →
Same app failure as his other brands: paired devices go missing on later launches.
App & firmwareowner2 agreedsource →
Can only pull 100W from the C1000 Gen 2's 12V ports and cannot confirm how XT60i sensing works.
Otherownersource →
What owners praise
Two units keep his gas furnace, three fridge/freezers and network alive for 5+ hours.
Runtimemeasuredowner15 agreedsource →
Anker 1000 gen 2's edge is a 2000W inverter, also at 25 pounds.
Inverter & surgemeasuredowner8 agreedsource →
Got the C1000 gen 2 on sale for $379 plus a $219 200W panel.
Price & valuemeasuredowner6 agreedsource →
Claims are weighted by how specific they are, whether the commenter owns the unit, and how many readers agreed. Comments that mention a product under a rival's review count for more, because the commenter had no reason to be there. This is what buyers report, not our test results — for measurements we ran ourselves, see the methodology.
Who Should Buy Which
Buy the DELTA Pro 3 if you…
- →You've sat through an outage that ran past bedtime. The 1,645Wh blackout list is the one load here that actually separates these two, and the DELTA Pro 3 finishes it with 1,837Wh left over.
- →You want one supply rather than three. A single 4,000W inverter with 120V/240V on the recordA1 is the thing no stack of small units reproduces.
- →You already know where it's going to live: a garage shelf, a basement corner, an RV bay. Decide that before you buy, not after the 112.4 lb box arrives.
- →You're feeding it with panels. 2,000W of solar input against 600W is the gap that gets wider the longer the grid stays down.
Buy the SOLIX C1000 Gen 2 if you…
- →Your worst night is a laptop, a router, phones, lights and maybe a CPAP. The 320Wh CPAP load leaves 550Wh of the Anker's 870Wh still spare.
- →You load it in and out of a car by yourself. 24.9 lb is the difference between a unit that travels with you and a unit that gets placed once.
- →You can top up between uses. Reviewers time a full refill at roughly 49 minutesB1, and if a wall socket is never far away, turnaround beats tank size.
- →You'd rather put the other $2,269 into panels, a second unit, or the trip itself.
If neither fits
Full-time van life. The daily draw modelled here is 4,685Wh, which leaves even the DELTA Pro 3 1,203Wh short and the C1000 Gen 2 3,815Wh short. If you're living off the battery rather than visiting it, you want a wired system sized in kilowatt-hours per day with its own roof array and charging from the engine, not a portable box with a handle. Buying the DELTA Pro 3 and hoping is the $2,799 version of that mistake.
The Bottom Line
Buy the DELTA Pro 3 if your worst night is house-shaped. The money isn't buying a better battery, a longer-lived one, or a cheaper one per watt-hour, since the two sit within a nickel of each other on all of that. It's buying four times the energy behind one 4,000W inverter, in a box that weighs 112.4 lb and isn't going anywhere once you set it down. If you've ever watched an outage outlast your battery, that's the right trade.
If your list fits under 870Wh, close the tab and buy the Anker. Same cycles, same warranty, same cost per watt-hour to within a few cents, and it fits in the back seat. Size the night. Everything else on this page is a footnote to that.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the DELTA Pro 3 worth four times the price of the SOLIX C1000 Gen 2?
It's worth it if you need four times the battery and it's dead money if you don't, because there's no discount either way. At 59 cents a watt-hour against the Anker's 54, the DELTA Pro 3 charges slightly more per unit of stored energy, not less. That makes this a sizing question rather than a value question: work out your worst night in watt-hours first, then buy the box that covers it.
Will the Anker SOLIX C1000 Gen 2 get me through a blackout?
Through a short one, yes. The 8-hour blackout load modelled on this page is 1,645Wh and the C1000 Gen 2 has 870Wh usable, so it stops 775Wh short of that full evening. Cut the list back to the fridge-and-phones essentials and it stretches a long way; run the full list and you'll be out before the lights return.
Is 2,000W of output enough, or do I need the DELTA Pro 3's 4,000W?
2,000W covers one big appliance at a time; the record here has the C1000 Gen 2 running a 1,500W space heater with headroom to spare. The 4,000W matters when you want that heater plus 2,500W of other things at once, or when you need 120V/240V. Both units carry the same 1.5x surge multiple over their continuous rating (6,000W over 4,000W, 3,000W over 2,000W), so startup behaviour scales with size and doesn't favour either design.
How fast does each one recharge?
Roughly 49 minutes for a full C1000 Gen 2 on its HyperFlash charging, and about 90 minutes for the DELTA Pro 3, with 0-80% in around 50 minutes on up to 7,000W of input. The big unit takes under twice as long to absorb four times the energy, which is exactly why it's the better multi-day-outage buy. On solar the gap is wider still, 2,000W of input against 600W.
Which one is quieter?
On the spec table the DELTA Pro 3, 30dB against 35dB, but treat both as single rated numbers rather than a curve across the load range. The useful detail is what happens under load: the C1000 Gen 2's fans are the most common complaint in its record, quiet under 200W and measured near 55 dB past 1,000W. There's no equivalent measurement for the DELTA Pro 3 in our record, so if silence is your deciding factor, don't let either printed figure decide it.
Where to buy
EcoFlow DELTA Pro 3Pick
$2,799.00
$2,799.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
Anker SOLIX C1000 Gen 2
$529.99
$529.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.