Head-to-head test
EcoFlow DELTA 3 Ultra Plus vs Anker SOLIX S5000
The S5000 sells its extra 1,952Wh at the Ultra Plus's own rate per watt-hour and adds 240V split-phase on top, so the only real case for the EcoFlow is the 22.7 lb you don't have to move.
Full profiles: EcoFlow DELTA 3 Ultra Plus → · Anker SOLIX S5000 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
The S5000 costs $901 more and gives you 1,952Wh more battery for it, which works out to almost exactly the same price per watt-hour as the DELTA 3 Ultra Plus. That's unusual. The bigger box normally carries a premium per unit of energy; here you're buying more of the same thing at the same rate.
The extra money also buys the part that matters in a house: an L14-30R outlet carrying 240V split-phase at up to 4,500WB2B3, and a solar ceiling of 3,000W against the Ultra Plus's 1,600W. Our record lists no 240V output on the EcoFlow. If your outage plan includes a well pump, a dryer circuit or a generator inlet, that settles it.
The Ultra Plus keeps two real advantages. It weighs 74.3 lb against 97, and it has a 12V car outlet the S5000 doesn'tB15. If the unit lives in a truck, a van or a spare room rather than a garage, those two facts outweigh everything above.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
Once capacity is priced the same, the 240V outlet is effectively thrown in. That's the outlet a well pump, a dryer circuit or a generator inlet needs, and the Ultra Plus can't supply it on its own.
DELTA 3 Ultra Plus: 3,072Wh, catalogue cost per Wh $.52SOLIX S5000: 5,024Wh, catalogue cost per Wh $.50S5000 has an L14-30R at 240V split-phase up to 4,500WB3; Ultra Plus record lists 240V outlets: 0
Why it mattersHome-backup buyers should stop treating the S5000 as the luxury option; it's the same deal, scaled up, with the house-wiring outlet attached.
solar input
Every hour of full sun at the ceiling banks 1,400Wh more on the S5000 (3,000 minus 1,600), which is about 46% of the Ultra Plus's entire pack. In a multi-day outage with a serious array, the Anker turns the same sunny morning into far more stored evening.
S5000 solar input: 3,000W across two inputsB5DELTA 3 Ultra Plus solar input: 1,600WCapacities: 5,024Wh vs 3,072Wh
Why it mattersAnyone pairing the station with a large rooftop or ground array gets more out of each sunny day from the S5000.
cost / lifetime kWh
That advantage is real only if you spend the cycles. A unit sitting at full charge waiting for a storm uses almost none, and on that duty the fair comparison is purchase price per watt-hour, where the two sit within two cents of each other. Neither reading makes the Ultra Plus the cheaper battery.
DELTA 3 Ultra Plus: 4,000 cycles, 12,288 kWh lifetime energy, $0.13 per lifetime kWhSOLIX S5000: 6,000 cycles to 80%B12, 30,144 kWh lifetime energy, $0.08 per lifetime kWhBoth carry a 5-year warranty
Why it mattersDaily solar cyclers get a clear lifetime win from the S5000; standby buyers get parity, never a loss.
weight
That defines who the Ultra Plus is for: the buyer whose station rides in a vehicle running a 12V fridge, or sits in the house near a bed. Our record carries no such placement rule for the EcoFlow, and it's 22.7 lb lighter to get there.
S5000 rated for non-habitable spaces; holding more than 1 kWh, it belongs outside sleeping roomsB7S5000 has no 12V car outletB15; Ultra Plus record lists oneWeights: 97 lb vs 74.3 lb
Why it mattersIf the unit lives anywhere but a garage or utility space, the Ultra Plus is the better fit regardless of the capacity math.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: The two cost nearly the same per watt-hour, so the long-run cost per kWh is where the S5000's 6,000-cycle rating shows up.
cost / lifetime kWh
Eight cents a lifetime kilowatt-hour against thirteen is the S5000's cleanest number, but it's conditional. A battery that shifts solar into the evening every day spends its cycles and collects the saving. A battery parked at full charge for the next ice storm barely touches them.
On standby duty the honest yardstick is what each watt-hour costs at the till, and there the two are nearly level. So the S5000 is never the expensive choice here. At worst it's the same price per unit of energy; at best it's markedly cheaper over the years.
Growth Path
Selected because: Both expand, but the S5000 starts at 5,024Wh and takes 3,000W of solar, so its expansion has a bigger engine feeding it.
solar input
Both take extra batteries, so expandability doesn't separate them. What does is the engine feeding the bank. Up to five BP5000 packs take the S5000 to 30,144WhB6, and 3,000W of panel input means a sunny day can actually refill a meaningful share of that. A large bank behind a 1,600W ceiling is a bank you'll rarely see full.
One catch on the Anker side: packs add hours, not watts. Stack all five and the outlets still deliver 4,500WB14. If you're short on running power rather than runtime, expansion doesn't fix it.
Portability & Form Factor
Selected because: A 22.7 lb gap between two heavy units decides who can actually move theirs.
weight
Ninety-seven pounds is more than one person should lift, and Anker designed around it: wheels, a pull rod, and a foot step for tipping the cabinet back onto themB10B11. It's a roll, not a carry. The Ultra Plus is the lighter lift by 22.7 lb.
The surprise is energy per pound. The S5000 carries about 52Wh per pound (5,024 ÷ 97) against about 41 for the Ultra Plus (3,072 ÷ 74.3). The heavier box is the denser one, so the weight you're hauling is mostly battery you paid for.
Your Life, Your Pick
Selected because: The S5000 wins every scored scenario on margin, and the one neither finishes shows how close it comes.
The 8-hour blackout is the row to read. The S5000 comes out of it with 2,625Wh left, 1.6 more nights like it; the Ultra Plus has 966Wh, about 59% of a second night. If outages where you live run past one evening, that difference is the purchase.
Van Life Daily is the honest outlier. Neither finishes the 4,685Wh day, but the S5000 falls 415Wh short against the Ultra Plus's 2,074Wh. A little afternoon sun closes the Anker's gap. The EcoFlow's needs a plan.
Strengths & trade-offs
EcoFlow DELTA 3 Ultra Plus
Strengths
- +Costs $901 less
- +Lighter by 22.7 lb
Trade-offs
- –Weaker inverter (-900W) limits appliance compatibility.
- –Shorter-lived battery — rated for 4,000 charge cycles vs the SOLIX S5000's 6,000, so it wears out sooner.
Anker SOLIX S5000
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$901) than the DELTA 3 Ultra Plus.
- –Significantly heavier (+22.7 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
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
SOLIX S5000
The DELTA 3 Ultra Plus finishes the weekend at 80% used with 511Wh in hand — one cold night or an extra device eats into that. The SOLIX S5000 finishes at 49% with 2,170Wh, real slack for the spontaneous stuff. If you camp in variable weather, that buffer is the difference between relaxing and watching the battery app.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
SOLIX S5000
Both survive the night. The SOLIX S5000 finishes at 39% used with 2,625Wh left — 1.6 more nights like it. The DELTA 3 Ultra Plus finishes at 63% with 966Wh, 59% of a second night. If your outages tend to run past one evening, that difference is the whole argument between them.
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 carry a CPAP's night with nearly the whole battery left, so capacity settles nothing. Placement might. The S5000's rating label keeps it out of sleeping rooms, so it runs the machine from a hallway or utility room on a cord; our record carries no such rule for the Ultra Plus.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
SOLIX S5000
The SOLIX S5000 clears the workday at 21% used, banking 3,360Wh — late work, extra calls, or a second laptop charge without arithmetic. The DELTA 3 Ultra Plus at 35% also finishes, with 1,701Wh of slack for the unplanned.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
SOLIX S5000
Both handle game day; the SOLIX S5000 keeps more in reserve (16% used vs 26%). Tailgating is a light load, though, so the number you'll feel is weight: 74.3 lbs for the DELTA 3 Ultra Plus against 97 lbs for the SOLIX S5000, from the trunk to the setup spot.
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 Ultra Plus comes up 2,074Wh short (about 56% covered), the SOLIX S5000 415Wh (91%) (its nameplate 5,024Wh actually clears this — the flat 15% conversion allowance is what tips it under). Either gets you most of the way, so this is a scenario you plan around rather than one you should rule them out for.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: SOLIX S5000 runs 20.8h vs 12.7h.
$2,499.99 list · direct from Anker
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 0–284.7hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–56.9hHigh-Draw Appliances
These reveal the real limitsscale 0–4.3h¹ 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 9, 2026
Verdict: the SOLIX S5000, on Power Score margin
Buy the SOLIX S5000 if this is for home backup. The $901 gap buys 1,952Wh more battery at essentially the same price per watt-hour, an L14-30R outlet that feeds 240V loads our record doesn't list the Ultra Plus reaching on its own, and 3,000W of solar input against 1,600W. The DELTA 3 Ultra Plus is the right call when the unit has to travel, run 12V gear from a car outlet, or live inside the house rather than a garage. Confidence stops short of the top because nobody outside Anker has tested an S5000 yetB0.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of October 9, 2026. The links below open EcoFlow's and Anker's current prices.
$2,499.99 · direct from Anker
or check the DELTA 3 Ultra Plus price$1,599.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated October 9, 2026
Black Friday · 45 days out
Price to beat:DELTA 3 Ultra Plus $1,499
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): UPS, RV Living, Tailgating.
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, DELTA 3 Ultra Plus rates 4.9/5 (92nd percentile of 26 Large-class units), and SOLIX S5000 rates 4.6/5 (74th percentile of 20 Home Backup-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.
Weight Reality Check
Neither unit is grab-and-go. The DELTA 3 Ultra Plus (74.3 lbs) is manageable solo but heavier than a large checked suitcase. The SOLIX S5000 (97 lbs) is noticeably heavier. That's a 23 lb difference.
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 DELTA 3 Ultra Plus works out at 3.1 years of cover per $1,000 spent against the SOLIX S5000's 2, but that spread is the price gap, not the terms.
Battery Lifespan in Real Years
The SOLIX S5000 is rated for 6,000 cycles vs 4,000. In real life: at daily use, that's 16.4 vs 11 years. At weekend use (twice a week), it's 58 vs 38 years. One caution reading years across different sizes: a cycle is 5,024Wh on the SOLIX S5000 and 3,072Wh on the DELTA 3 Ultra Plus, so count lifetime energy — roughly 30,144 kWh against 12,288 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 SOLIX S5000.
Check SOLIX S5000 price →or check the DELTA 3 Ultra 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 DELTA 3 Ultra Plus is cheaper to buy, but the SOLIX S5000 is cheaper to own. At $0.08/kWh over its lifetime vs $0.13/kWh, the SOLIX S5000's higher cycle life and capacity make each dollar go further over the years.
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
Long-cycle LiFePO4 is Anker's card on this page: the S5000 is rated for 6,000 cycles to 80%, the higher rating of the pair.
Worth knowing
Support reports for the SOLIX line have trended down from Anker's historically easy replacements, and returning a 97 lb unit means hazmat freight. Its expansion lineup is smaller than EcoFlow's.
Analyst note
EcoFlow brings the bigger ecosystem and the larger community; Anker brings the longer cycle rating. Neither brand's support record is spotless, so buy from a retailer with an easy return policy.
Growth path
DELTA 3 Ultra Plus
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,072Wh.
Accepts up to 1,600W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
SOLIX S5000
EXPANDABLESupports Anker expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 5,024Wh.
Accepts up to 3,000W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are Anker-specific. You're investing in the Anker ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, but the SOLIX S5000's higher solar ceiling (3,000W vs 1,600W) gives it the stronger off-grid growth path — more panels can feed a bigger bank as it grows.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Ultra Plus
What exists comes from reviewers on short loans rather than long-term ownersA0. Within that, the fan is the consistent theme: reviewers describe it as quieter under heavy load than older EcoFlow units and comparable to the DELTA Pro UltraA1A2A13. The UPS handoff drew no complaints, with one reviewer reporting no shut-offs or dips when the wall cord was pulledA6, and build quality reads as solid across separate reviewsA8A14.
Two smaller notes. One reviewer found the unit shuts its 30A port down first when overloadedA3, and another had to shade the screen by hand to read it in direct sunA7. One reviewer worked a full eight-hour remote day on it and still had 40% leftA5.
“even when you're pushing it hard, the DELTA 3 Ultra Plus runs much quieter than older EcoFlow models, like the DELTA 2 Max”
Sources
thesolarlab.com · postperspective.com · appleinsider.com · digitaltrends.com · storagereview.com
Anker SOLIX S5000
Nobody outside Anker has run an S5000 yet, so the evidence is Anker's own documentationB0. The rating label fixes the 5,024Wh LiFePO4 pack, the 4,500W split-phase output and the outlet listB1B2B3; the product page adds the 6,000-cycle rating, the 97 lb weight on wheels and the ≤10ms switchoverB11B12B13. Treat runtime and lifespan figures as Anker's internal testing until someone else measures them.
“5,024 Wh LiFePO4 pack rated 16 V, 314 Ah; the cell code IFpP72/175/208[5S] reads as five large prismatic cells in series.”
Sources
ankersolix.com
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Professional reviewers consistently describe the fan noise as very quiet even under heavy load, comparable to EcoFlow's premium DELTA Pro Ultra line. [DELTA 3 Ultra Plus · 3 entries]
- Reviewers report solid UPS/pass-through charging performance with no noticeable switchover issues or output throttling tied to input wattage. [DELTA 3 Ultra Plus · 2 entries]
- The unit's high weight (~74 lbs) and premium MSRP are repeatedly flagged as drawbacks, though discounted street pricing is seen as making the value proposition much stronger. [DELTA 3 Ultra Plus · 3 entries]
- Build quality/durability is praised as substantial and non-fragile across multiple independent reviews. [DELTA 3 Ultra Plus · 2 entries]
- No owner or reviewer reports exist yet: every entry is Anker documentation (rating label, product page, launch announcement), plus one of our own readings of the app and label drawing. [SOLIX S5000 · 20 entries]
- A1
“even when you're pushing it hard, the DELTA 3 Ultra Plus runs much quieter than older EcoFlow models, like the DELTA 2 Max”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · unknown · [positive]
- A2
“we'd probably say the noise it creates is similar to what you hear when you run the DELTA Pro Ultra, which is pretty amazing”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · unknown · [positive]
- A3
“One weird thing we noticed was the fact that the unit always seems to shut down the 30A port first when you overload the unit”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · unknown · [mixed]
- A5
“I was able to work remotely for an eight-hour day with 40% power left, which included running my laptop, desktop workstation and monitors”
postperspective.com — Review: EcoFlow Delta 3 Ultra Plus Portable Power Station · 2026-04 · [positive]
- A6
“I didn't experience any shut-offs or dips when I unplugged the EcoFlow from the wall”
postperspective.com — Review: EcoFlow Delta 3 Ultra Plus Portable Power Station · 2026-04 · [positive]
- A7
“while facing the sun, I had to employ the classic "cup hands cover" maneuver to get a clear look at the screen status”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11 · [mixed]
- A8
“It does not feel cheap or fragile. Everything from the outer shell case to the plastic buttons and the AC cable feels substantial and durable”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11 · [positive]
- A13
“Each unit operates quietly at under 25dB, remaining unobtrusive even during sustained loads”
storagereview.com — EcoFlow DELTA 3 Max Plus & Ultra Plus Review · 2025-09-30 · [positive]
- A14
“the Delta 3 Ultra Plus can withstand drops of up to 0.2m, and both models feature moisture resistance to mitigate risks from overnight dew”
storagereview.com — EcoFlow DELTA 3 Max Plus & Ultra Plus Review · 2025-09-30 · [positive]
- B1
“5,024 Wh LiFePO4 pack rated 16 V, 314 Ah; the cell code IFpP72/175/208[5S] reads as five large prismatic cells in series.”
Anker rating label, model AS510 (certified 2026-09-15) · 2026-09-15 · [positive]
- B2
“AC output 4,500 W max, either at 120 V (37.5 A across the outlets) or at 120/240 V split-phase (18.75 A).”
Anker rating label, model AS510 (certified 2026-09-15) · 2026-09-15 · [positive]
- B3
“Outlets: one L14-30R carrying 240 V split-phase at up to 4,500 W; one TT-30R RV outlet at 120 V, 30 A, 3,600 W; NEMA 5-20R household outlets at 120 V, 20 A, 2,400 W; USB-C 100 W, USB-C 15 W and USB-A 12 W.”
Anker rating label, model AS510 (certified 2026-09-15) · 2026-09-15 · [positive]
- B5
“Two solar inputs, 3,000 W together: 11–60 V at 17 A (1,000 W) and 16–165 V at 17 A (2,000 W).”
Anker rating label, model AS510 (certified 2026-09-15) · 2026-09-15 · [positive]
- B6
“Expands with up to five BP5000 expansion batteries (model AS5101A1-85), each 5,024 Wh, for 30,144 Wh in total. They join through a 400 V DC port rated 9,000 W in and 7,500 W out; each battery charges at up to 3,200 W and discharges at up to 3,000 W.”
Anker rating label, model AS510 (certified 2026-09-15) · 2026-09-15 · [positive]
- B7
“Rated for residential non-habitable spaces; holding more than 1 kWh, it belongs outside sleeping rooms and other living spaces.”
Anker rating label, model AS510 (certified 2026-09-15) · 2026-09-15 · [mixed]
- B10
“An upright cabinet with a handle on top, a full-width front panel with a display, and wheels at the base; the label drawing of the back adds a foot step marked STEP ON for tipping it back onto its wheels.”
Power Station Arena, read from the S5000 card in the Anker app and the label drawing, 2026-09-20 · 2026-09-15 · [positive]
- B11
“Net weight 97 lb; 10.6 × 22.0 × 15.2 in (W × D × H), on wheels with a pull rod and foot pedal.”
Anker SOLIX S5000 product page, ankersolix.com/s5000 (published 2026-10-09) · 2026-10-09 · [positive]
- B12
“Cycle life: 6,000 cycles to 80% capacity, 10,000 cycles to 60%; Anker estimates a 15-year lifespan at 1 to 2 cycles a day, with 5 years of product coverage.”
Anker SOLIX S5000 product page, ankersolix.com/s5000 (published 2026-10-09) · 2026-10-09 · [positive]
- B13
“UPS switchover ≤10 ms; Anker quotes 30 dB in quiet operation.”
Anker SOLIX S5000 product page, ankersolix.com/s5000 (published 2026-10-09) · 2026-10-09 · [positive]
- B14
“4,500 W rated, 8,000 W peak AC output; bypass mode passes up to 4,500 W.”
Anker SOLIX S5000 product page, ankersolix.com/s5000 (published 2026-10-09) · 2026-10-09 · [positive]
- B15
“Front panel: four NEMA 5-20R outlets at 120 V, one L14-30R and one TT-30R, plus USB-A 12 W, USB-C 15 W and USB-C 100 W. No 12 V car outlet is listed.”
Anker SOLIX S5000 product page, ankersolix.com/s5000 (published 2026-10-09) · 2026-10-09 · [neutral]
Research compiled October 9, 2026.
Who Should Buy Which
Buy the DELTA 3 Ultra Plus if you…
- →You need a station that goes in a truck bed or a van for trips and still covers the house in an outage: at 74.3 lb, the Ultra Plus is the one you can lift.
- →Your setup runs a 12V fridge or other car-socket gear, which the S5000 has no outlet for.
- →The unit has to live in the house rather than a garage or utility room, where the S5000's label wants it.
Buy the SOLIX S5000 if you…
- →You're backing up a house with 240V loads, such as a well pump or a dryer circuit, through an L14-30 inlet.
- →You have or plan a large solar array, and want each sunny hour to put 3,000W back rather than 1,600W.
- →You'll run it hard for years, where 6,000 rated cycles make it the cheaper battery per kWh delivered.
If neither fits
If the job is a laptop, a router and a CPAP through the night, both are a lot of battery to buy and store; a station around a third the size of either covers it for far less. If you want the whole panel on, central air included, look at an installed home battery system instead.
The Bottom Line
Take the S5000 for a house. You pay $901 more and get it back as battery at the same rate per watt-hour, and the 240V outlet, the bigger solar input and the longer cycle rating come along at no extra cost per watt-hour.
Take the Ultra Plus if the box has to travel, run 12V gear or live indoors. Otherwise, roll the Anker into the garage and stop doing arithmetic.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Anker SOLIX S5000 worth the extra over the EcoFlow DELTA 3 Ultra Plus?
For home backup, yes. The $901 difference buys 1,952Wh more battery at nearly the same price per watt-hour, plus 240V split-phase output and almost twice the solar input. If you need to lift the unit or run car-socket gear, the Ultra Plus is the better fit.
Can the DELTA 3 Ultra Plus power 240V appliances?
Not on its own, going by our record, which lists no 240V output for it. The S5000 has an L14-30R outlet carrying 240V split-phase at up to 4,500W, the connection a well pump circuit or a generator inlet expects.
Which one recharges faster from solar panels?
Both refill from empty in under two hours at their solar ceilings, but the S5000 puts 5,024Wh back in that time against 3,072Wh. Its two inputs total 3,000W against the Ultra Plus's 1,600W. Either figure assumes an array big enough to reach the ceiling.
Can I keep the Anker SOLIX S5000 in a bedroom for my CPAP?
Its rating label says no: holding more than 1 kWh, it's rated for non-habitable spaces and belongs outside sleeping rooms. It carries a CPAP night easily, using about 7% of its usable capacity, but it does that from a hallway, utility room or garage on a cord.
How heavy is the Anker SOLIX S5000 compared with the DELTA 3 Ultra Plus?
97 lb against 74.3, a 22.7 lb difference. The S5000 rolls on wheels with a pull rod and foot pedal, so moving it across a floor is easy and lifting it into a vehicle is a two-person job.
Where to buy
EcoFlow DELTA 3 Ultra Plus
$1,599.00
$1,599.00 · direct from EcoFlow
Last checked 28 days ago. Prices move — check before you buy.
Anker SOLIX S5000Pick
$2,499.99
$2,499.99 · direct from Anker
Prices may vary by retailer and are subject to change.