Head-to-head test
EcoFlow DELTA 3 Plus vs Anker SOLIX C800
Anker has discontinued the SOLIX C800, and the DELTA 3 Plus would have won on battery, surge, solar input and growth anyway; the one thing worth checking before you buy it is the fan behavior reviewers keep flagging.
Full profiles: EcoFlow DELTA 3 Plus → · Anker SOLIX C800 →
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
Spec deltas
Anker no longer sells the SOLIX C800. It has been replaced by the SOLIX C800X, and this page shows no price or buy button for the original, which leaves exactly one unit here you can buy new: the EcoFlow DELTA 3 Plus. It's also the one we'd pick if both were still on the shelf.
The C800's specs still matter if you own one or spot one in leftover retailer stock, so here's what it gives up. The DELTA 3 Plus carries a third more battery (1,024Wh against 768Wh), runs 1,800W continuously against 1,200W, surges to 3,600W against 1,600W, and takes 1,000W of solar against 300W. It also accepts expansion batteries. The C800 stops at 768Wh for good.
The DELTA's honest catch is its fans. Reviewers report them switching on at low loads and cycling on and off erratically, which undercuts its quiet marketingA1A2, while one reviewer found the C800 fan-silent below 500WB7. It's also 3.2 lbs heavier, at 27 lbs against 23.8. If you're set on Anker, the comparison you actually want is the DELTA against the C800X, which this page can't spec.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
solar input
That turns the blackout row from a capacity contest into a refill contest. The DELTA's 775Wh shortfall is under an hour of full rated solar (775 divided by 1,000); the C800's 992Wh shortfall is more than three hours at its ceiling (992 divided by 300). Real panels rarely hold their rating, so stretch both figures, but the proportion survives: the DELTA makes up a lost evening in a sunny morning, and the C800 spends most of the day on it.
DELTA 3 Plus: 1,000W max solar input, 1,024Wh capacitySOLIX C800: 300W max solar input, 768Wh capacity8-Hour Blackout needs 1,645Wh: DELTA 3 Plus comes up 775Wh short, SOLIX C800 992Wh short
Why it mattersIf your outage plan includes panels, solar input is the spec to buy on, well ahead of the extra 256Wh.
continuous output
That's the difference between running a heater as designed and running it on borrowed time. The surge ceilings widen it: 3,600W leaves room for a motor to start while other loads are already drawing, where the C800's 1,600W has to be checked against the heaviest startup on your list.
DELTA 3 Plus: 1,800W continuous, 3,600W surgeSOLIX C800: 1,200W continuous, 1,600W surgeOne reviewer ran a 1,500W space heater on the C800 for 25 minutes before it throttledB8
Why it mattersAnyone planning to run a 1,500W resistive appliance, or a fridge sharing the outlet with other loads, should treat output as the deciding spec.
Capacity is settled for bedside use, so the fan becomes the whole question, and it's the DELTA's one weak card. Reviewers expect EcoFlow to fix it in firmwareA4, but we can't confirm a fix has shipped. The single quiet report on the C800 comes from a site our research flags as possibly templatedB7B0.
DELTA 3 Plus carries the quieter published noise rating, though each maker rates noise its own wayReviewers report the DELTA 3 Plus's fans switch on at low loads and cycle erraticallyA1A2CPAP Overnight needs 320Wh: DELTA 3 Plus has 550Wh to spare, SOLIX C800 333Wh
Why it mattersCPAP buyers should still take the DELTA, since the C800 can't be bought new, but buy it where returns are easy and listen to it at low load in the first week.
The specific dimensions that decide these two units — everything else is a tie.
Your Life, Your Pick
Selected because: The C800 misses the Tailgate row by 17Wh and Remote Workday by 257Wh; the DELTA 3 Plus clears one and misses the other by 40Wh.
The C800's closest miss is the tailgate: 670Wh needed, 653Wh usable, 17Wh short. Its nameplate 768Wh would clear the load; the flat 15% conversion allowance is what tips it under. The DELTA 3 Plus finishes the same day with 200Wh left, and wins the CPAP night on margin too, though a 320Wh night is comfortably inside both.
Remote Workday is the row to read if you work off-grid. The DELTA misses 910Wh by 40Wh, close enough that a short stint on panels closes it; the C800 is 257Wh short behind a 300W solar ceiling. Weekend Camping, the 8-Hour Blackout and Van Life Daily beat both outright, and the answer there is a bigger station or the DELTA's expansion batteries, not a choice between these two.
What the Specs Don't Tell You
Selected because: Surge, UPS rating and fan noise are where these two differ in daily use, and noise is the one that cuts against the DELTA 3 Plus.
rated cycles
Surge is the gap that changes what you can plug in. The DELTA 3 Plus surges to double its continuous rating; the C800 manages about a third over its own. The switchover ratings split the same way, no worse than 10ms against no worse than 20ms, and reviewers describe the DELTA's as seamless in useA3. If the UPS outlet feeds a desktop PC with unsaved work, that's the rating class you want.
Noise is the one card that runs against our pick. The published ratings favor the DELTA, but reviewers report its fans kicking on at low load and cycling erraticallyA1A2, and one argues the cycling raises the risk of running hot under heavy loadsA2. The quiet box on paper is the fidgety one in practice.
Growth Path
Selected because: The C800 is sealed at 768Wh and no longer sold; the DELTA 3 Plus starts at 1,024Wh and takes expansion batteries.
solar input
Growth only counts if you can still buy in, and the C800 is now sealed twice over: fixed at 768Wh by design, and no longer sold. The DELTA 3 Plus takes EcoFlow expansion batteries, so its ceiling moves if your needs do.
Its first advantage isn't the port, though. It's the extra 256Wh you get on day one. Expansion batteries are a separate purchase this page doesn't price, so count on them only if you can name the load that would outgrow 1,024Wh.
Brand Trust
Selected because: With the C800 discontinued, the live choice is EcoFlow against Anker's replacement, the SOLIX C800X, so the brands matter as much as the boxes.
EcoFlow's profile is the deepest ecosystem in portable power and a polarized support record: prepaid-label replacements for some customers, long waits and refurbished units for others, and no parts or service once the warranty ends. Its own best advice applies doubly here. Buy from a retailer with a strong return policy, such as Costco or Amazon, while the fan reports are still openA1.
Anker brings the bigger consumer-electronics name, with SOLIX support trending down from its historic standard and firmware updates that have removed features without warning. For a C800 owner, the practical question is how a discontinued model is supported, and our record doesn't answer it. Ask Anker before you need a claim, not after.
Strengths & trade-offs
EcoFlow DELTA 3 Plus
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 4,000 charge cycles — much longer battery lifespan
Trade-offs
- –No major technical downsides compared to rival.
Anker SOLIX C800
Strengths
- +Lighter by 3.2 lb
Trade-offs
- –Weaker inverter (-600W) limits appliance compatibility.
- –Sealed capacity — the DELTA 3 Plus can add batteries to grow past 768Wh; this one can't.
- –Shorter-lived battery — rated for 3,000 charge cycles vs the DELTA 3 Plus's 4,000, so it wears out sooner.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
Neither unit covers this scenario's 2,100Wh: the DELTA 3 Plus comes up 1,230Wh short (about 41% covered), the SOLIX C800 1,447Wh (31%). Treat this as partial cover — enough for the essentials in it, not the whole list.
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 carries the full 1,645Wh: the DELTA 3 Plus covers about 53%, the C800 about 40%. What separates them is what happens once the battery runs low. The DELTA takes up to 1,000W of solar and EcoFlow expansion batteries, so its 775Wh gap is fixable; the C800's 992Wh gap meets a 300W solar ceiling and a 768Wh battery that can't grow.
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
A CPAP at about 40W for eight hours is a 320Wh night, and both carry it. The DELTA 3 Plus takes the row on margin, with 550Wh left at dawn against the C800's 333Wh: its 870Wh usable covers about two and a half nights, the C800's 653Wh about two. Capacity isn't the risk beside a bed. Fan behavior is, and neither maker's published noise rating describes a 40W draw.
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
Neither finishes a 910Wh workday on battery alone. The DELTA 3 Plus misses by 40Wh, close enough that a short stint on panels closes it, and it accepts up to 1,000W of solar. The C800 is 257Wh short behind a 300W solar ceiling, which is a real gap rather than a rounding error.
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 Plus
The day needs 670Wh. The DELTA 3 Plus finishes with 200Wh to spare. The C800 misses by 17Wh against its 653Wh usable figure; its nameplate 768Wh clears the load, so it's the flat 15% conversion allowance that tips it under. Close, but the DELTA is the one that doesn't ask you to unplug something in the fourth quarter.
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 3 Plus comes up 3,815Wh short (about 19% covered), the SOLIX C800 4,032Wh (14%). 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 3 Plus runs 4.2h vs 3.2h.
$719 list · direct from EcoFlow
Planning for more than this? Describe your whole setup and get it sized →
Modeled from the spec record — same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.¹
Essentials
The basics you need runningscale 0–58hComfort & 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
October 11, 2026
Verdict: the DELTA 3 Plus, on Power Score margin
Anker no longer sells the SOLIX C800, so the DELTA 3 Plus is the only unit here you can buy new, and it's the one we'd pick if both were still on the shelf: a third more battery, a 3,600W surge ceiling against 1,600W, 1,000W of solar input against 300W, a switchover rated no worse than 10ms against no worse than 20ms, and expansion batteries where the C800 stops at 768Wh. The catch is its fans, which reviewers report switching on at low loads and cycling erraticallyA1A2, an issue they expect a firmware update to fixA4. Buy it somewhere with an easy return window. If you're staying with Anker, the comparison to make is the DELTA against the SOLIX C800X, which replaced the C800; if you already own a C800 and it covers your loads, keep it.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of October 11, 2026. The links below open EcoFlow's current price.
$719.00 · direct from EcoFlow
Last checked 28 days ago. Prices move — check before you buy.
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated October 11, 2026
Black Friday · 26 days out
Price to beat:DELTA 3 Plus $649
The lowest we have recorded. A Black Friday price above it is a sale this unit has already had.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): RV Living, Home Backup, Food Truck.
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 4.3/5 (62nd percentile of 27 Everyday-class units), and SOLIX C800 rates 4.1/5 (47th percentile of 20 Compact-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.
Two Ratings, Two Rulebooks
The C800 is published at 45dB and the DELTA 3 Plus at 30dB, but each maker rates noise its own way, so the difference isn't one you can count on hearing, and neither figure describes a light overnight load. Don't let either number decide a bedside purchase; the field-report section on this page is the better guide.
SOLIX C800: Sealed, and No Longer Sold
The C800 stops at 768Wh by design, and with Anker no longer selling it there's no buying into it either. The DELTA 3 Plus takes EcoFlow expansion batteries, but its first edge is the 1,024Wh it starts with; expansion is the step after that, for someone who would outgrow 1,024Wh too.
Surge Power: Inverter Quality Indicator
The DELTA 3 Plus has a 2× surge-to-continuous ratio vs the SOLIX C800's 1.3×, and the higher absolute ceiling with it — 3,600W against 1,600W. At 2× it clears the 2× rule of thumb for absorbing motor startups — fridges, AC compressors and power tools briefly draw 2-3× their rated wattage. What decides whether a given motor starts is the ceiling, not the ratio: the SOLIX C800 still surges to 1,600W, so check the startup draw of the heaviest thing you plan to run against that figure rather than assuming it trips.
UPS Switchover: ≤10ms vs ≤20ms
Both list a UPS mode, at different rated speeds. The DELTA 3 Plus is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The SOLIX C800 is rated ≤20ms — fine on paper for routers and most electronics; the fussiest PC power supplies sit right at this line. If a computer with unsaved work is the thing being protected, the stated class is worth the attention; nothing here is a lab result.
Warranty: Same Term, One Footnote
Both carry a 5-year term on our record, so coverage doesn't separate them. The footnote is the C800's status: Anker no longer sells it, so if you find one in leftover retailer stock, confirm with the seller that the full term applies to your purchase before you pay.
Battery Lifespan in Real Years
The DELTA 3 Plus is rated for 4,000 cycles vs 3,000. In real life: at daily use, that's 11 vs 8.2 years. At weekend use (twice a week), it's 38 vs 29 years. One caution reading years across different sizes: a cycle is 1,024Wh on the DELTA 3 Plus and 768Wh on the SOLIX C800, so count lifetime energy — roughly 4,096 kWh against 2,304 kWh over the rated life. After hitting the cycle limit, the battery doesn't die — it drops to ~80% of original capacity, which is still very usable.
Full record above — the Test Desk pick is the DELTA 3 Plus.
Check DELTA 3 Plus price →Ownership Analysis
What happens after you buy — true cost of ownership, brand trust, and growth potential.
Lifetime value
Service lifeyears at one full cycle per day
Lifetime energy delivered
Cost per delivered kWh
│ warranty ends · Reaching the cycle rating means ~80% capacity remains — degraded, not dead.
Analyst note
The SOLIX C800 is no longer sold, so there is no price to work its cost per kWh from, and this comparison doesn't quote one. On what you can actually buy today, the DELTA 3 Plus works out at $0.18/kWh over its rated life. If you already own the SOLIX C800, the hardware comparison still holds: over its rated life the DELTA 3 Plus delivers about 4,096 kWh and the SOLIX C800 about 2,304 kWh.
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 top of the range sit two whole-home paths: the TITAN line, one 5 kWh unit that grows to 30 kWh, and the DELTA Pro Ultra platform, which stacks batteries and inverters further — flagship paths, not line-wide features.
Worth knowing
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
Anker has discontinued the SOLIX C800 and replaced it with the SOLIX C800X. SOLIX support is trending down from Anker's historic standard, and firmware updates have removed features without warning.
Analyst note
With the C800 gone, this is really EcoFlow against Anker's replacement for it, the SOLIX C800X. EcoFlow brings the deeper ecosystem and an expansion line the DELTA 3 Plus can grow into; Anker brings the larger consumer-electronics name. Neither brand's support record is spotless, so buy either from a retailer with an easy return window.
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 C800
FIXED CAPACITYFixed at 768Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 300W of solar. Limited to a single portable panel.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Growth only counts if you can still buy in, and the SOLIX C800 is no longer sold (Anker points owners to the SOLIX C800X). That leaves the DELTA 3 Plus: it starts at 1,024Wh and takes EcoFlow expansion batteries, so the ceiling moves if your needs do. The SOLIX C800's fixed 768Wh still matters if you already own one, but it isn't a reason to pick it over the DELTA 3 Plus.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Plus
Long-term owner data is thin; what exists is reviewer coverage, and it agrees on both endsA0. The good end is very fast recharging and a switchover reviewers call seamless, inside its sub-10ms ratingA3. The bad end is the fans. Two separate reviews report them switching on at low loads and cycling on and off erraticallyA1, and one argues the erratic cycling raises the risk of the unit overheating under heavy loadsA2.
The hopeful read is that this is software. Reviewers expect EcoFlow to resolve it with a firmware update, as it has on other stations after releaseA4. We can't confirm that fix has shipped, so treat the reports as current until EcoFlow says otherwise.
“Otherwise well-designed, with very fast recharge times and a seamless sub-10ms UPS switchover for uninterrupted power.”
Sources
thesolarlab.com
Anker SOLIX C800
The C800's file is reviewer blogs only, with no owner forum threads found, and our research flags some of those sites as possibly templated, so weigh it lightlyB0. Within that, one reviewer dropped it 30 inches off a tailgate onto gravel and got only scuffingB1, though it carries no IP weather ratingB2. One measured a full charge in 58 minutes from a 600W adapterB9, and another ran a 1,500W space heater for 25 minutes, past its 1,200W rating, before it throttledB8.
The quiet report is the one that matters on this page: one reviewer heard zero fan noise under 500W loads and only a mild hum at maximumB7. That's a single source from a flagged siteB0, but it's the opposite of what reviewers say about the DELTA's fans. The complaints are the 300W solar ceiling, called middling for its sizeB5, and a weight that reviewers say is too much to carry far on footB4B12.
“We dropped it from a tailgate (30 inches) onto gravel—only minor scuffing, no damage.”
Sources
backuppowerhub.com · portablepowergeek.co.uk · batteryskills.com · batteryessence.com · toolsandtoys.net · bikmantech.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]
- Build quality/chassis is repeatedly called solid and drop-resistant, but reviewers flag the lack of an IP weather rating as a real-world caveat for outdoor use. [SOLIX C800 · 3 entries]
- The 58-minute AC fast-recharge is the single most-mentioned standout feature, praised as faster than rivals like the Jackery 700. [SOLIX C800 · 2 entries]
- Reviewers note the unit can briefly exceed its 1200W rating for heavy appliances, but caution it can't sustain full-size continuous loads like a full-size fridge. [SOLIX C800 · 2 entries]
- Long 5-year warranty and strong retailer star ratings are cited as reassurance/value signals. [SOLIX C800 · 2 entries]
- Weight (~23-24 lbs) is repeatedly flagged as a downside relative to lighter rivals despite the compact footprint. [SOLIX C800 · 2 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
“We dropped it from a tailgate (30 inches) onto gravel—only minor scuffing, no damage.”
backuppowerhub.com — Anker SOLIX C800 Review: Best Budget Power Station? · 2025-12 · [positive]
- B2
“However, the C800 lacks IP weather rating. Keep it covered when camping.”
backuppowerhub.com — Anker SOLIX C800 Review: Best Budget Power Station? · 2025-12 · [negative]
- B4
“The Solix C800 is nearly 3kg heavier than the River 2 Pro, and 2.5kg heavier than the Grecel T1000.”
portablepowergeek.co.uk — Anker Solix C800 Review · 2024-11 · [negative]
- B5
“Only allows a middling amount of solar charge at 300W max solar panels, when compared to its equivalently-sized models.”
portablepowergeek.co.uk — Anker Solix C800 Review · 2024-11 · [mixed]
- B7
“Zero fan noise under 500W loads, unlike louder competitors (e.g., Bluetti EB55). Only a mild hum at max load.”
batteryskills.com — Anker SOLIX C800 Portable Power Station Review · 2025-10 · [positive]
- B8
“Powered a 1500W space heater (surpassing its 1200W rating) for 25 minutes before throttling—unexpectedly robust for its size.”
batteryskills.com — Anker SOLIX C800 Portable Power Station Review · 2025-10 · [positive]
- B9
“Achieved a full charge in 58 minutes using a 600W AC adapter (matching Anker's claim), while competitors like the Jackery 700 take 2+ hours.”
batteryskills.com — Anker SOLIX C800 Portable Power Station Review · 2025-10 · [positive]
- B12
“At 23.15 lbs (10.5 kg), this is too heavy for carrying far on foot. For hiking, a smaller, lighter power bank under 5 lbs is a better fit.”
batteryessence.com — Anker SOLIX C800 Portable Power Station 768Wh Review · 2026-03 · [negative]
Research compiled October 11, 2026.
Who Should Buy Which
Buy the DELTA 3 Plus if you…
- →You're buying one station now for blackouts and solar weekends, and you want it to take up to 1,000W of panels and grow with expansion batteries later.
- →A desktop PC or router will sit on the UPS outlet, and you want the switchover rated no worse than 10ms rather than no worse than 20ms.
- →Your list includes a 1,500W space heater or similar, which runs inside the DELTA's 1,800W continuous rating instead of overloading a 1,200W inverter.
Buy the SOLIX C800 if you…
- →Nobody new: Anker no longer sells the C800. If you want to stay with Anker in this class, put the SOLIX C800X, which replaced it, against the DELTA 3 Plus.
- →You already own a C800 and your loads fit inside 768Wh and 1,200W. Keep it. At twice-weekly use its 3,000 rated cycles last about 29 years, so there's no wear-out reason to switch, only a capability one.
If neither fits
If you need a full camping weekend (2,100Wh) or a whole 8-hour blackout (1,645Wh) on one charge, both fall short; look at a larger station, or plan on the DELTA's expansion batteries from day one. And if you're carrying it far on foot, neither is a hiking battery at 23.8 and 27 lbs. A small power bank is the right category.
The Bottom Line
Anker has discontinued the SOLIX C800, so the DELTA 3 Plus is the only unit on this page you can buy new, and it would have won anyway. The strongest reason is solar: 1,000W of input turns the blackout it can't cover on battery alone into one it makes up in a sunny morning, where the C800's 300W spends most of the day on it.
Buy it from a retailer with an easy return window and listen to the fans in the first weekA1. If you own a C800 that covers your loads, keep it. If you're staying with Anker, put the C800X against the DELTA instead. Everyone else: go get the DELTA 3 Plus.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Anker SOLIX C800 discontinued?
Yes. Anker has replaced it with the SOLIX C800X, and the C800 has left its range, so this page shows no price or buy link for it. If you find one in leftover retailer stock, confirm the warranty terms with the seller and compare it against the C800X before buying.
Is the EcoFlow DELTA 3 Plus better than the Anker SOLIX C800?
On nearly every spec, yes: 1,024Wh against 768Wh, 1,800W continuous against 1,200W, a 3,600W surge against 1,600W, 1,000W of solar input against 300W, and expansion batteries the C800 can't take. The C800's edges are 3.2 lbs less weight and one reviewer's report of no fan noise under 500W, against reviewer complaints of erratic fan cycling on the DELTA.
Which is better for a CPAP, the DELTA 3 Plus or the SOLIX C800?
The DELTA 3 Plus, not least because it's the one you can buy new. Both carry a 320Wh CPAP night with room to spare, 550Wh left on the DELTA against 333Wh on the C800. The thing to check is noise: reviewers report the DELTA's fans switching on at low loads and cycling erratically, so buy it where returns are easy.
I already own a SOLIX C800. Should I upgrade to the DELTA 3 Plus?
Only if you've outgrown it. The C800 isn't wearing out: at twice-weekly use its 3,000 rated cycles last about 29 years. Upgrade if you keep hitting the 768Wh ceiling, the 1,200W output limit or the 300W solar cap, because those are the three walls the DELTA moves.
How fast does the DELTA 3 Plus recharge from solar?
It accepts up to 1,000W of solar, so at full rated input it refills its 1,024Wh in about an hour. Real panels rarely hold their rating, so plan on longer. Under the same perfect conditions the C800, capped at 300W, needs about two and a half hours for its smaller 768Wh battery.
Where to buy
EcoFlow DELTA 3 PlusPick
$719.00
$719.00 · direct from EcoFlow
Last checked 28 days ago. Prices move — check before you buy.
Anker SOLIX C800
No longer sold
Prices may vary by retailer and are subject to change.