Head-to-head test
EcoFlow DELTA 3 Plus vs Anker SOLIX C1000 Gen 2
The C1000 Gen 2 is $50 cheaper, lighter, and pushes more sustained output — the DELTA 3 Plus counters with nearly double the solar input and a bigger surge, if you can live with its restless fan.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
EcoFlow
DELTA 3 Plus
3,225Power Score · Appliance Class
$689.00 list · direct from EcoFlow
Anker
SOLIX C1000 Gen 2
3,357Power Score · Appliance Class
$549.99 list · direct from Anker
Spec deltas
These two 1kWh units are near-identical where it's hardest to be: same 1,024Wh capacity, same 4,000-cycle LFP battery, same expandable design, same 5-year warranty, same sub-10ms UPS cutover. The decision lives entirely in what's different.
The Anker C1000 Gen 2 is the cheaper, leaner one — $649 to the DELTA 3 Plus's $699, 24.9 pounds to 27, and it sustains 2,000W to the EcoFlow's 1,800, refills in about 49 minutesB1, and carries a faster 140W USB-C port. It's the value-and-output pick of the pair.
The DELTA 3 Plus's case is solar and surge: 1,000W of solar input to the Anker's 600 — nearly double, a real advantage off-grid — and a 3,600W surge to the Anker's 3,000. But its headline weakness is real: reviewers repeatedly flag fan behavior that runs even at low load and cycles erratically, undercutting the quiet-UPS role EcoFlow markets it forA1A2. A strong unit with a genuine quirk.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
With the capacity, battery life, and warranty identical, the C1000 Gen 2 gives you 200W more continuous output for $50 less — so on the two things a buyer notices first, price and how much it can run, the Anker leads.
the C1000 Gen 2 costs $649 vs the DELTA 3 Plus's $699the C1000 Gen 2 sustains 2,000W vs the DELTA 3 Plus's 1,800Wboth hold 1,024Wh on the same 4,000-cycle battery
Why it mattersFor sustained high-draw loads on a budget, the C1000 Gen 2 is the straightforward pick.
solar input
The DELTA 3 Plus accepts two-thirds more solar than the Anker and surges 600W higher, so for a buyer building an off-grid setup — panels plus expansion batteries — it recharges from the sun faster and starts stubborn motors with more room.
the DELTA 3 Plus takes 1,000W of solar vs the C1000 Gen 2's 600Wthe DELTA 3 Plus surges to 3,600W vs the C1000 Gen 2's 3,000Wboth units are expandable
Why it mattersSolar-heavy or motor-heavy users are the ones who should pay the DELTA 3 Plus's premium.
The DELTA 3 Plus's fans activate even under light loads and cycle on and off unpredictablyA1, which limits the quiet-UPS role it's sold for, while the C1000 Gen 2's fans stay off until real load arrivesB2 — so the Anker is the more predictable roommate for a desk or bedroom.
the DELTA 3 Plus's fans run even at low load and cycle erraticallyA1the DELTA 3 Plus is marketed as near-silentA1the C1000 Gen 2 is quiet under 200W and only ramps up past 1,000WB2
Why it mattersIf the unit will sit in a quiet room running light loads, the C1000 Gen 2 behaves better.
The specific dimensions that decide these two units — everything else is a tie.
What the Specs Don't Tell You
Selected because: Output, solar, surge, and the DELTA 3 Plus's fan flaw are the decisive splits.
The two split cleanly. The C1000 Gen 2 sustains more (2,000W vs 1,800), charges faster (about 49 minutesB1), and adds a 140W USB-C port. The DELTA 3 Plus takes nearly double the solar (1,000W vs 600) and surges 600W higher (3,600W vs 3,000). Neither list is longer than the other; they just point at different buyers.
What tips it is the DELTA 3 Plus's fan. Reviewers describe it running even under low loads and cycling erratically, which not only undercuts its quiet-UPS marketing but raises overheating risk under heavy loadA1A2. EcoFlow may patch it in firmwareA4, but today it's a real strike against a unit whose main soft advantage was supposed to be quiet operation.
Lifetime Value
Selected because: Identical batteries make the $50 price gap the real value lever.
cost / lifetime kWh
With identical 1,024Wh capacity and 4,000-cycle batteries, cost-to-own is nearly a tie — $0.16 per lifetime kWh for the Anker, $0.17 for the EcoFlow. The value difference is simply the sticker: the C1000 Gen 2 is $50 cheaper for the same core unit.
That $50 buys the DELTA 3 Plus's solar headroom and surge, not more battery or longer life. So the value question is narrow and specific — if you'll use the extra solar input, the premium is justified; if you charge mostly from the wall, you're paying for a ceiling you won't reach, and the Anker is the better deal.
Portability & Form Factor
Selected because: The C1000 Gen 2 is 2.1 lbs lighter — a small but real edge.
weight
The C1000 Gen 2 is the lighter unit at 24.9 pounds to the DELTA 3 Plus's 27 — a 2.1-pound edge. It's not dramatic, but for a 1kWh unit that moves between rooms or rides to a campsite, lighter is always the friendlier choice.
Both are comfortable one-person lifts, so this won't decide the matchup on its own. It's one more small tally in the Anker's column, alongside the lower price and faster charging — the kind of everyday-convenience edge that adds up.
Brand Trust
Selected because: EcoFlow's stronger app versus Anker's value and the DELTA 3 Plus's quirk.
EcoFlow brings the stronger software story: the biggest ecosystem in portable power and a top-rated app (4.6/5 on iOS). Anker counters with its own well-regarded app (4.5/5) and consumer-electronics pedigree, though its SOLIX-specific support has slipped from its once-excellent standard.
The practical wrinkle is that EcoFlow's edge is software while its DELTA 3 Plus's problem is hardware behavior — the erratic fanA1A2. Anker's unit has the more mundane, predictable noise profileB2. Support is uneven at both, so buy from a retailer with an easy return window and weigh solar needs against the DELTA 3 Plus's quirk.
Strengths & trade-offs
EcoFlow DELTA 3 Plus
Strengths
- +Faster solar charging
Trade-offs
- –No major technical downsides compared to rival.
Anker SOLIX C1000 Gen 2
Strengths
- +Costs $139 less
- +Lighter by 2.1 lb
- +Higher AC output
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 can fully handle this scenario (needs 2,100Wh). You'd need a higher-capacity station or to cut back on usage.
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
Neither unit
Neither unit alone covers a fridge-plus-lights blackout for a full eight hours — both hold the same 1,024Wh, short of the load. Both expand to get closer, but the DELTA 3 Plus's 1,000W solar input recharges faster mid-outage if the sun's out, while the Anker's higher sustained output starts and holds a hair more. For a multi-day outage with solar, the EcoFlow's input edge matters most.
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 run a CPAP's ~320Wh night three times over, so capacity is a non-issue. But this is exactly where the DELTA 3 Plus's fan quirk bites: fans that cycle on and off at low load are the last thing you want 18 inches from your head all night. The C1000 Gen 2, quiet until real load arrives, is the safer overnight choice despite its slightly higher rated noise.
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
Neither unit
A laptop-monitor-router day lands near 910Wh, right at the usable edge of both 1,024Wh units — a tie on runtime, since they carry identical capacity. The tiebreak is the desk experience: the C1000 Gen 2's fans stay quiet at these light loads, while the DELTA 3 Plus's tendency to spin up even under low draw makes it the more distracting companion for a workday.
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
Either unit
Both handle game day easily. Since capacity isn't the deciding factor, consider weight: the lighter unit is easier to load into a truck bed. Also check if either has Bluetooth speaker-level noise. Fan sound matters in social settings.
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 can fully handle this scenario (needs 4,685Wh). You'd need a higher-capacity station or to cut back on usage.
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 six scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
Dead heat — both run this 205W load for roughly 4.2h. Pick on price, weight, or ports.
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 0–58hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–11.6hHigh-Draw Appliances
These reveal the real limitsscale 0–0.9h¹ 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
July 13, 2026
Verdict: the SOLIX C1000 Gen 2
The Anker SOLIX C1000 Gen 2 edges out the EcoFlow DELTA 3 Plus for most buyers. The two are twins on the fundamentals — same 1,024Wh, same 4,000-cycle battery, same expandable design, same 5-year warranty, same sub-10ms UPS — so the differences decide it. The C1000 Gen 2 is $50 cheaper ($649 vs $699), 2.1 lbs lighter, sustains 200W more output (2,000W vs 1,800), charges in about 49 minutes, and adds a 140W USB-C port. The DELTA 3 Plus answers with nearly double the solar input (1,000W vs 600) and a higher 3,600W surge, plus EcoFlow's stronger app — but reviewers flag a real fan-behavior flaw that undercuts its quiet-UPS pitch. If you charge heavily from solar, the DELTA 3 Plus makes sense; otherwise the cheaper, lighter, quirk-free Anker wins.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 13, 2026. The links below open EcoFlow's and Anker's current prices.
$549.99 list · direct from Anker
or check the DELTA 3 Plus price$689.00 list
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated July 13, 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 Plus rates 4.4/5 (65th percentile of 24 Everyday-class units), and SOLIX C1000 Gen 2 rates 4.9/5 (96th percentile of 24 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.
3,600W surge versus 3,000W — startup room against sustained muscle
The DELTA 3 Plus surges to 3,600W, double its 1,800W rating, giving motor-driven loads like pumps and compressors extra room to start. The C1000 Gen 2 surges to 3,000W but sustains a higher 2,000W continuously. So it's a split: the DELTA 3 Plus handles bigger startup spikes with more headroom, while the Anker runs more sustained load once things are going. Match the spec to whether your tough loads spike at startup or pull hard the whole time.
Warranty Value Comparison
The SOLIX C1000 Gen 2 gives you 9.1 years of warranty per $1,000 spent, vs the DELTA 3 Plus's 7.3 years. That's 1.3× more coverage per dollar. An underrated factor if you're keeping this unit for years.
Full record above — the Test Desk pick is the SOLIX C1000 Gen 2.
Check SOLIX C1000 Gen 2 price →or check the DELTA 3 Plus 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.
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. Supports up to 180kWh modular expansion with DELTA Pro Ultra X.
Worth knowing
The Oct 2025 DELTA Max 2000 recall (overheating/fire risk, 6 incidents) is worth noting. Also 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
EcoFlow runs the deepest ecosystem in portable power and the better-rated app (4.6/5), with a strong solar-panel lineup that plays to the DELTA 3 Plus's 1,000W input. Anker counters with parent-brand trust, an app nearly as good (4.5/5), and the best $/Wh value in its Gen 2 line — though its SOLIX support has slipped from its once-excellent standard. The twist is that EcoFlow's advantage here is software while the DELTA 3 Plus's problem is hardware behavior — its erratic fan — so the Anker is the more predictable unit day to day. Buy from a retailer with an easy return window either way, and let solar needs, not the badge, break the tie.
Growth path
DELTA 3 Plus
EXPANDABLESupports EcoFlow 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 1,000W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
SOLIX C1000 Gen 2
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit — 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 Plus's higher solar ceiling (1,000W 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 3 Plus
The DELTA 3 Plus earns real praise for speed: very fast recharge times and a fast sub-10ms UPS switchover for uninterrupted powerA3, on the same 4,000-cycle battery as its rival. Its 1,000W solar input is a genuine off-grid strength.
But reviews keep circling one flaw — the fans. They activate even under low loads and cycle on and off erratically, which undercuts the near-silent operation EcoFlow markets and, under heavy load, raises overheating riskA1A2. Reviewers expect a firmware fix is possibleA4, but as tested it's the unit's defining quirk.
“Otherwise well-designed, with very fast recharge times and a seamless sub-10ms UPS switchover for uninterrupted power.”
Sources
thesolarlab.com
Anker SOLIX C1000 Gen 2
The C1000 Gen 2 is widely rated the mid-size unit to beat in 2026 — a refined, powerful, fast-charging update to a popular platformB4 — with HyperFlash recharging in about 49 minutesB1 and enough output to run a 1,500W space heater with headroomB3.
Its one consistent knock is predictable, at least: fan noise that's near-silent under 200W but climbs to around 55dB past 1,000WB2. Unlike the DELTA 3 Plus, its fans stay quiet until real load arrives, which makes it the steadier choice for light-load, in-room use.
“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
- The DELTA 3 Plus's headline weakness is fan behavior — fans run even at low load and cycle erratically, undercutting its quiet-UPS marketing. [DELTA 3 Plus · 3 entries]
- Fast charging and higher output over the original are the standout gains; fan noise under load or fast charging is the top complaint. [SOLIX C1000 Gen 2 · 3 entries]
- A1
“Marketed as near-silent, but real-world fan performance is a significant flaw: the fans activate even under low loads and cycle on and off erratically, which limits its effectiveness as a quiet UPS.”
T3 — EcoFlow DELTA 3 Plus review: Lightning-fast charging with a noisy flaw; thesolarlab.com — DELTA 3 Plus Review · 2026 · [negative]
- A2
“Part of why it stays quiet is that the internal fans aren't always doing their job properly — the erratic cycling raises the risk of the unit overheating when running heavy loads.”
thesolarlab.com — EcoFlow DELTA 3 Plus Review: Amazing, but One Big Quirk? · 2026 · [negative]
- A3
“Otherwise well-designed, with very fast recharge times and a seamless sub-10ms UPS switchover for uninterrupted power.”
T3 / thesolarlab.com — DELTA 3 Plus reviews · 2026 · [positive]
- A4
“Reviewers note EcoFlow should be able to resolve the fan behavior with a software update, as it has done for other power stations after release.”
thesolarlab.com — DELTA 3 Plus Review · 2026 (dated claim — may be partially addressed by firmware) · [mixed]
- 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 July 13, 2026.
Who Should Buy Which
Buy the DELTA 3 Plus if you…
- →You charge heavily from solar and want the 1,000W input, nearly double the Anker's 600.
- →You need the higher 3,600W surge for stubborn motor loads.
- →You want EcoFlow's app and ecosystem, and you'll accept the fan quirk or bet on a firmware fixA4.
If neither fits
Both cap near 1,024Wh, so neither covers a full 8-hour blackout alone — though both expand to get closer. If you want whole-outage runtime in one box, step up to a 1.5-2kWh unit rather than paying up for either of these.
The Bottom Line
The C1000 Gen 2 is the better all-around buy: $50 cheaper, lighter, higher sustained output, faster charging, and free of the fan quirk that dogs its rival — all on the same capacity, battery life, and UPS speedB4. For a buyer who charges mostly from the wall and wants a predictable, capable 1kWh unit, it's the easy call.
The DELTA 3 Plus earns its premium in one clear scenario: heavy solar use, where its 1,000W input nearly doubles the Anker's, backed by a higher surge and a better app. If that's your setup and you'll accept the flagged fan behavior — or bet on EcoFlow patching itA4 — it's a strong unit. For everyone else, the cheaper, steadier Anker takes it.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
EcoFlow DELTA 3 Plus vs Anker SOLIX C1000 Gen 2 — which should I buy?
The C1000 Gen 2 for most buyers: it's $50 cheaper, 2.1 pounds lighter, sustains 200W more output, and charges in about 49 minutes, while matching the DELTA 3 Plus on capacity, cycle life, and UPS speed. Choose the DELTA 3 Plus if you charge heavily from solar — it takes 1,000W to the Anker's 600 — or need its higher surge, and you can live with its flagged fan behavior.
What's the problem with the DELTA 3 Plus's fans?
Reviewers report the fans activate even under low loads and cycle on and off erratically, which undercuts EcoFlow's near-silent marketing and its use as a quiet UPS; under heavy load, the erratic cycling can raise overheating risk. EcoFlow may be able to fix it with a firmware update, but as tested it's the unit's most-cited weakness.
Which is better for solar charging?
The DELTA 3 Plus, clearly — it accepts 1,000W of solar input to the C1000 Gen 2's 600, nearly double, so it refills from a panel array faster and suits an off-grid setup better. If solar is your main charging source, that's the strongest reason to pay the DELTA 3 Plus's $50 premium. From the wall, the Anker is the quicker of the two.
Are they otherwise similar?
Very. Both hold 1,024Wh, use a 4,000-cycle LFP battery, are expandable, carry a 5-year warranty, and switch over in under 10ms for UPS duty. The meaningful differences are the Anker's lower price, higher output, lighter weight, and faster charging versus the DELTA 3 Plus's greater solar input, higher surge, and better app — set against its fan quirk.
Where to buy
EcoFlow DELTA 3 Plus
$689.00
$689.00 list · direct from EcoFlow
Anker SOLIX C1000 Gen 2Pick
$549.99
$549.99 list · direct from Anker
Prices may vary by retailer and are subject to change.