Head-to-head test
Anker SOLIX C300 vs BLUETTI EB3A
Anker's SOLIX C300 switches over in 10ms — three times faster than the EB3A's 30ms — on a unit whose owners have never reported the false 'overload' shutdowns that plague BLUETTI's UPS mode, and that reliability gap is worth more than the $111 it costs.
Full profiles: Anker SOLIX C300 → · BLUETTI EB3A →
Written by Wenny ZhengUpdated
Portable Power Tester, Station Arena Test Desk
$329.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
$219.00 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
Anker's SOLIX C300 switches over from grid to battery in 10ms — three times faster than the EB3A's 30ms — and reviewers call that speed legitimately unique in this size and price classA3. For a unit that's meant to sit between your electronics and a power outage, that's the single most important spec on this page.
It matters more than usual here because the EB3A has a documented history on the opposite side of that exact job: owners running it as light-load UPS backup — a CPAP, a router — report false 'overload' shutdowns that firmware updates haven't reliably fixedB5B6B7B9. The C300's headline feature runs directly into the EB3A's most consistent complaint.
The EB3A still wins on raw output and price per Wh, and it's $111 cheaper. If your job is short, heavy bursts rather than trustworthy standby duty, that's a real reason to look past the UPS gap.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Speed and reliability point the same direction here — this isn't a fast unit with a hidden flaw, it's a fast unit with no matching complaint pattern against a slower unit with a well-documented one.
The SOLIX C300's UPS switchover is 10ms against the EB3A's 30msOwners report the EB3A throwing false 'overload' shutdowns at light, steady loads in UPS modeB5B7B8B9
Why it mattersAnyone buying either unit specifically to protect a CPAP, router, or desktop through a power blink should weight this gap above every other spec on the page.
Capacity
The C300 isn't trading capacity for its reliability advantage — the buyer who pays the $111 premium gets a bigger tank and the faster switchover in the same purchase, not a smaller unit with better manners.
The C300 costs $330 and holds 288Wh of capacityThe EB3A costs $219 and holds 268Wh of capacity
Why it mattersThe usual 'pay more, get less' tradeoff doesn't apply here — there's no capacity penalty for choosing the more reliable unit.
None of the C300's advantages trade against each other. Quiet, fast USB-C, and fast switchover all sit on the same side of the ledger, which is unusual for a comparison at this price point.
The C300 is rated at 25dB under load against the EB3A's 50dBThe C300 has dual 140W USB-C ports against the EB3A's single 100W port
Why it mattersBuyers weighing multiple secondary specs — noise, laptop charging speed, standby reliability — don't have to pick which one matters most; the C300 wins all three at once.
continuous output
That's the honest reason to still pick the EB3A: if the job is charging a laptop fast or running a tool for a few minutes rather than sitting in standby duty, its bigger ceiling and lower cost per Wh are the more relevant numbers, and the UPS gap barely factors in.
The EB3A outputs 600W continuous against the C300's 300WThe EB3A costs $.74 per Wh against the C300's $.83
Why it mattersBuyers who will never use this unit's UPS or standby function should weight the EB3A's output and price advantage instead — paying $111 more for a feature you won't use isn't the smart trade.
The specific dimensions that decide these two units — everything else is a tie.
What the Specs Don't Tell You
Selected because: UPS speed and noise are the two specs where this pairing is least ambiguous.
rated cycles
This pairing's defining gotcha is UPS speed: the C300 switches in 10ms, the EB3A in 30ms — three times slower, and marketed as basic standby rather than the C300's line-interactive class. Reviewers single out the 10ms figure as legitimately unusual for this size and price bracketA3.
Noise follows the same pattern in miniature: 25dB for the C300 against 50dB for the EB3A. Combined with the EB3A's documented overload pattern in UPS modeB5B7B9, the gotchas on this page all point the same direction.
PowerScore Breakdown
Selected because: The widest power_score gap in the batch, worth explaining what drives it.
overall power score
This is the widest power_score gap in the batch: 1,772 for the C300 against 1,598 for the EB3A, a real margin rather than a rounding difference. It's driven by the C300's warranty, cycle life, switchover speed, and noise rating all beating the EB3A's at once, not by any single spec.
The EB3A claws some of that back on raw output and cost per Wh, neither of which factors as heavily into the score as reliability-adjacent specs do — worth remembering if your priority is raw wattage rather than the balanced profile the score is measuring.
Lifetime Value
Selected because: The C300 wins every lifetime metric despite costing more upfront.
cost / lifetime kWh
The C300 is the cheaper unit to own by every lifetime measure: $0.28 per kWh against the EB3A's $0.30, $48 per warranty-year against $100, and 3,000 rated cycles against 2,500 — all for about $111 more upfront.
That $111 buys three extra years of warranty and 500 more rated cycles, not just a bigger number on the box. Judged purely as an investment, it's the better-covered unit at a lower long-run rate.
Portability & Form Factor
Selected because: An unusual inversion — the higher-capacity unit is also the lighter one.
weight
The C300 is actually the lighter of the two here — 9.1 lbs against the EB3A's 10.1 lbs, a full pound less despite holding 20 more watt-hours. That inversion is unusual; normally more capacity means more weight.
A pound doesn't change how you carry either unit day to day, but it does mean the C300 isn't trading portability for its other advantages — you're not paying in ounces for the quieter fan and faster switchover.
Brand Trust
Selected because: Cross-brand pair with a live storyline: Anker's support quality trending down from a historic high.
Anker brings the strongest name recognition of any brand in this batch, built on decades in consumer electronics, and SOLIX support was historically excellent — though recent reports describe more AI-driven, generic responses and complicated return logistics for heavier units. BLUETTI's support remains the more consistently inconsistent of the two, leaning on email with delays from a different time zone.
Anker's decline is a trend to watch, not yet a pattern as deep as BLUETTI's documented UPS-mode issues. For this specific pairing, where the C300's core advantage is standby reliability, Anker's brand trust still edges BLUETTI's.
Strengths & trade-offs
Anker SOLIX C300
Strengths
- +Lighter by 1 lb
- +Larger battery capacity
- +Longer warranty
Trade-offs
- –Substantially more expensive (+$111) than the EB3A.
BLUETTI EB3A
Strengths
- +Costs $111 less
- +Higher AC output
- +Faster solar charging
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 seven 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 SOLIX C300 comes up 1,855Wh short (about 12% covered), the EB3A 1,872Wh (11%). 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 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 covers this scenario's 1,645Wh: the SOLIX C300 comes up 1,400Wh short (about 15% covered), the EB3A 1,417Wh (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 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
Neither unit
Neither unit covers this scenario's 320Wh: the SOLIX C300 comes up 75Wh short (about 76% covered), the EB3A 92Wh (71%). 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 CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Neither unit
Neither unit covers this scenario's 910Wh: the SOLIX C300 comes up 665Wh short (about 27% covered), the EB3A 682Wh (25%). Treat this as partial cover — enough for the essentials in it, not the whole list.
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
Neither unit
The SOLIX C300 can start the 400W peak but not hold it — 600W of surge gets it going, then the 300W continuous rating takes over, so capacity never gets a say. This is the wrong size of unit for the job rather than a close call. The EB3A doesn't have the energy either — 228Wh usable against 670Wh, 442Wh short — so neither route works.
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 SOLIX C300 comes up 4,440Wh short (about 5% covered), the EB3A 4,457Wh (5%). 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
SCN-07 · an afternoon · needs 100Wh
Afternoon Off-Grid
Phones and a speaker at the park, beach, or campsite — the small-unit job description
Either unit
This is the job small stations are actually for, and both do it: the SOLIX C300 finishes at 41% used, the EB3A at 44%. At this size the decider is what rides in the bag — 9.1 lbs for the SOLIX C300 against 10.1 for the EB3A — and price, not the leftover watt-hours.
Battery budget usedlower = more headroom
LOAD Phone Charger (×2) 30W×2h · Bluetooth Speaker 10W×4h
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 C300 runs 1.2h vs 1.1h.
$329.99 list · direct from Anker
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 0–16.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–3.3hHigh-Draw Appliances
These reveal the real limits¹ 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 14, 2026
Verdict: the Anker SOLIX C300
The SOLIX C300 is the clear pick for anyone using this as UPS or CPAP backup: its 10ms switchover is three times faster than the EB3A's 30ms, reviewers call that speed legitimately unique in this size and price class, and there's no ledger pattern of it failing at light loads the way the EB3A's doesB5B7B8B9. It also runs quieter (25dB vs 50dB), holds more capacity (288Wh vs 268Wh), and carries a longer warranty (5 years vs 2) — for about $111 more. The EB3A only wins on raw output (600W vs 300W) and cost per Wh ($.74 vs $.83). Unless your job is short, heavy power bursts rather than reliable standby duty, pay the $111.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 14, 2026. The links below open Anker's and BLUETTI's current prices.
$329.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
or check the EB3A price$219.00 list
Written by Wenny Zheng, Portable Power Tester · Station Arena Test Desk · Updated July 14, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): UPS, Solar Generator.
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, SOLIX C300 rates 4.2/5 (52nd percentile of 22 Personal-class units), and EB3A rates 3.8/5 (29th percentile of 22 Personal-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.
Half the Decibels
25dB against 50dB under load — a gap you'd hear the moment both units are charging in the same room.
10ms vs 30ms, and a Track Record to Match
Three times faster on paper, and the faster unit here is also the one without a documented pattern of failing at light loads.
Five Years vs Two, Plus More Capacity
The longer warranty here doesn't cost you capacity — the better-covered unit also holds more watt-hours.
Full record above — the Test Desk pick is the SOLIX C300.
Check SOLIX C300 price →or check the EB3A priceOwnership Analysis
What happens after you buy — true cost of ownership, brand trust, and growth potential.
Lifetime value
Service lifeyears at one full cycle per day
Lifetime energy delivered
Cost per delivered kWh
│ warranty ends · Reaching the cycle rating means ~80% capacity remains — degraded, not dead.
Analyst note
Both units have similar long-term ownership costs ($0.38/kWh vs $0.33/kWh). The price difference is what you see on the sticker — neither is a hidden bargain or rip-off.
Brand trust
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.
BLUETTI
Ecosystem
One of the broadest lineups — 15-20+ models from budget (AC2A) to flagship portable (Apex 300, 2764.8Wh). Includes specialized products: vehicle solar hubs, sodium-ion cold-weather units, and balcony storage systems.
Support
The most inconsistent support in the space. Heavily email-based with China timezone delays. Some users get smooth, efficient service; others report weeks of troubleshooting runarounds, being offered discounts on new units instead of repairs, and confusing third-party purchase claim processes. Buying direct from Bluetti's website tends to produce better support outcomes.
Community
Active and growing — Reddit r/bluetti has a dedicated community. Second-largest after EcoFlow in engagement.
App experience
Rated 4.5/5 iOS and Android — tied for best app experience in the category. V3.0 UI redesign was well-received.
Unique strength
Among the best capacity-to-price ratios available — several Elite and Apex units are the lowest $/Wh in the catalog. Widest product diversity including industry-firsts like sodium-ion cold-weather units and dual solar+alternator vehicle hubs. LFP across the rest of the range, though rated cycle life spans 2,500 (EB3A) to 6,000, and it varies WITHIN the Elite range rather than tracking it — the Elite 300 and Elite 200 V2 are rated 6,000 while the Elite 30 V2, Elite 10 Mini, Elite 320 and Elite 400 are rated 3,000+ and the Elite 100 V2 4,000+, so check the specific model. Dual-voltage (120V/240V) in flagships.
Worth knowing
Customer support inconsistency is the #1 risk factor. Older/discontinued units may become unrepairable — no spare parts policy for some models. Some reports of erratic communication from support agents.
Analyst note
Anker's brand strength is still ahead of BLUETTI's on paper, even with SOLIX support quality trending down from its historic high. For this specific pairing, where the C300's edge is reliability, that brand gap reinforces the spec-level case rather than working against it.
Growth path
SOLIX C300
FIXED CAPACITYFixed at 288Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 100W of solar. Limited to a single portable panel.
Adequate ports for most setups, but heavy users may want a power strip.
EB3A
FIXED CAPACITYFixed at 268Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 200W of solar. Limited to a single portable panel.
Limited ports. You'll likely need a power strip or splitter.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Neither expands, and that's no knock on either — each is a complete unit at a fixed size. Buy the capacity that covers your needs now (the SOLIX C300 gives you the larger ceiling); you can't add to either later.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
Anker SOLIX C300
Reviewers consistently point to two things on the C300: its 288Wh capacity paired with dual 140W USB-C ports for genuinely fast device chargingA1, and a 10ms UPS switchover that multiple sources independently call unique for its size and price classA3. Anker markets it as meaningfully smaller than competing stations, and reviewers describe it as impressively compact for a unit aimed at keeping phones and gadgets topped off on hikes and camping tripsA2, with the target buyer being someone who specifically values reliability and smart featuresA4.
“288Wh capacity with 300W output (600W with SurgePad) and dual 140W USB-C ports for fast device charging.”
Sources
ankersolix.com · trustedreviews.com · im.com.au · solarwaypoint.com · backuppowerhub.com · powerstationlab.com
BLUETTI EB3A
Support is where the EB3A's UPS-mode problems become most frustrating for owners. One reported that BLUETTI's own fix — a firmware update — actually increased the frequency of the fault, and that support 'eventually just shrugged and had no further help'B9. Another said an app support ticket simply went unansweredB10.
The underlying fault is the same false 'overload' shutdown documented elsewhere for this unit: a CPAP user lost power partway through the night despite a draw far under the unit's ratingB7, and one owner tracking multiple failures called it a complete failure rate among the units they personally knew of used that wayB8.
One unusual footnote: an owner reported the EB3A generating enough electrical harmonics on the AC line to visibly interfere with a nearby computer monitor that wasn't even plugged into itB11 — an odd, specific complaint that doesn't fit the noise or overload patterns but points at the same general theme of inconsistent behavior under light electronic loads.
“Bluetti advertises the EB3A as "tiny but mighty," and I have to agree. They crammed a lot of ports and functionality into a very portable package... it seems to be a very well-polished product.”
Sources
toolguyd.com · diysolarforum.com · backuppowerhub.com · wanderwoman.ca
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Compact, light design; dual 140W USB-C fast charging; and a standout 10ms UPS rare at this size are the highlights. [SOLIX C300 · 3 entries]
- Multiple owners across forums (2022-2024) report the EB3A randomly shutting off or throwing false 'overload' errors under light loads (40-60W) when used in UPS mode for CPAPs, computers, or routers — a persistent, unresolved issue even after firmware updates. [EB3A · 6 entries]
- Recurring complaints about fan noise and odd fan behavior (ramping, buzzing, wobble) span from 2022 through 2024, spanning silent mode, idle, and charging states, suggesting an ongoing hardware/firmware characteristic rather than a one-time defect. [EB3A · 5 entries]
- Owners report poor or unresponsive Bluetti customer support when troubleshooting UPS failures, including unhelpful firmware fixes and unanswered app support tickets. [EB3A · 2 entries]
- Despite reliability complaints in UPS use, several long-term/extended testers (60+ days, CPAP overnight use) report satisfaction with portability, build quality, and real-world runtime for camping/outage scenarios. [EB3A · 3 entries]
- A1
“288Wh capacity with 300W output (600W with SurgePad) and dual 140W USB-C ports for fast device charging.”
ankersolix.com / trustedreviews.com — SOLIX C300 review · 2026 · [positive]
- A2
“Anker claims the C300 is 30% smaller than competing power stations; reviewers call it impressively light and compact for the capacity, aimed at keeping phones and gadgets charged on hikes and camping trips.”
im.com.au / solarwaypoint.com — SOLIX C300 review · 2026 · [positive]
- A3
“Its 10ms UPS switchover is legitimately unique in this size and price class.”
backuppowerhub.com / powerstationlab.com — SOLIX C300 review · 2026 · [positive]
- A4
“Targets users who value reliability, smart features, and compact design.”
backuppowerhub.com — SOLIX C300 review · 2026 · [positive]
- B5
“There is a known issue when running it in UPS mode with a light load (40~60 watts). The unit does not keep itself cool and overheats. (The display shows overload.)”
toolguyd.com — 'Bluetti EB3A Portable Power Station Review' comments · 2023-04 (purchased Aug 2023) · [negative]
- B6
“Firmware was updated and did not help. There are various setting some people said helped, but none did for me. The issue has been around for as long as the product”
toolguyd.com — 'Bluetti EB3A Portable Power Station Review' comments · 2023-08 · [negative]
- B7
“About 2-3 hours into my night's sleep it shut down, showing an "overload" indication despite the fact that my CPAP only draws at most 40 watts.”
diysolarforum.com — 'EB3A "Overload" When Used as Uninterruptible Power Supply' · 2022-09 · [negative]
- B8
“He said that both had failed recently in exactly the same way under light loads... Of the units I personally know of that're being used in this way that's a 100% failure rate”
diysolarforum.com — 'EB3A "Overload" When Used as Uninterruptible Power Supply' · 2022-09 · [negative]
- B9
“I contacted bluetti support and they told me to upgrade the firmware. I did so, and that actually increased the frequency of the "blinks". Support eventually just shrugged and had no further help”
diysolarforum.com — 'Is Bluetti EB3A any good as a UPS?' · 2022-12 · [negative]
- B10
“I tried submitting a ticket via the Bluetti app but never got any response. They don't really have support.”
diysolarforum.com — 'Is Bluetti EB3A any good as a UPS?' · 2022-12 · [negative]
- B11
“the unit generates too much harmonics on the 120-volt AC line that messes up my PC's monitor (located next to EB3A but not plugged into it)”
diysolarforum.com — 'Is Bluetti EB3A any good as a UPS?' · 2022-12 · [negative]
Research compiled July 14, 2026.
What Owners Actually Report
Drawn from 72 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.
Anker SOLIX C300
14 claims from 11 comments · 9 from owners · 2 with figures
- Build quality
- 2 · 55% negative
- Other
- 3 · 0% negative
- Size & weight
- 2 · 21% negative
- Solar input
- 3 · 14% negative
- Durability
- 1 · 0% negative
What owners complain about
Returned it: temps hit 52C and above when recharging at 300-330W, with a terrible burning plastic smell.
Build qualitymeasuredowner5 agreedsource →
A 300W inverter cannot start a fridge or drive a drill, where a 600W unit can.
Inverter & surgesource →
Calls the tall tower form factor nonsense in a car camper where a flat, stable unit is needed.
Size & weightsource →
What owners praise
Prefers the Ankers for portable use in the car or beside a chair.
Size & weightowner34 agreedsource →
Better AC outlet spacing, more USB-C ports and a light; bought two after the EcoFlow issue.
Build qualityowner4 agreedsource →
Uses two Anker 300W stations to power video lights on film shoots instead of costly V-mount batteries.
Otherowner1 agreedsource →
BLUETTI EB3A
90 claims from 61 comments · 76 from owners · 22 with figures
- Durability
- 12 · 100% negative
- Runtime
- 10 · 33% negative
- Warranty & support
- 7 · 55% negative
- Price & value
- 10 · 11% negative
- Solar input
- 6 · 40% negative
What owners complain about
EB3A's 8.5A input limit caps solar around 175-180W even with a bigger panel.
Solar inputmeasuredowner6 agreedsource →
Two EB3A units both threw an overload error on a 38W load in UPS mode after 9-24 hours.
UPS switchovermeasuredowner4 agreedsource →
His EB3A died and needed a warranty replacement.
Durabilityowner48 agreedsource →
What owners praise
Ten-pound EB3As are far easier on his bad back than one 32-pound unit.
Size & weightmeasuredowner6 agreedsource →
Lasted 17 hours 30 minutes on the identical 12V fridge test.
Runtimemeasuredowner1 agreedsource →
General support replied within an hour and a new unit arrived in about 2.5 weeks total.
Warranty & supportowner48 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 SOLIX C300 if you…
- →You're using this to protect a CPAP, router, or desktop through power blinks, where the 10ms switchover and the absence of a documented overload pattern matter more than $111.
- →You want the quieter unit (25dB vs 50dB) and faster USB-C laptop charging over dual 140W ports, and don't mind paying a premium for a more balanced spec sheet.
Buy the EB3A if you…
- →Your job is short, heavy power draws rather than standby duty — charging a laptop fast, running a tool for a few minutes — where the EB3A's 600W output and lower cost per Wh are the more relevant numbers.
- →You're not using this as unattended UPS backup, so the switchover speed and overload pattern don't apply to your use case, and $111 is real money to you.
If neither fits
If the actual job is a real blackout, neither is close — the modeled 8-hour draw is roughly 1,645Wh, well over five times the C300's 288Wh and six times the EB3A's 268Wh. Both are supplemental units; look at a larger-capacity station for genuine outage coverage.
The Bottom Line
The SOLIX C300's 10ms switchover isn't just a faster number than the EB3A's 30ms — it's paired with a clean reliability record against the EB3A's documented pattern of false overload shutdowns in the exact same use caseB5B7B9. Add in more capacity, a quieter fan, and a longer warranty for about $111 more, and this is one of the more one-sided calls in this batch.
The EB3A stays the right choice for short, heavy power draws where UPS reliability isn't the job. But for anything you're trusting to catch a power blink unattended, pay the $111 and take the C300.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Anker SOLIX C300's UPS really faster than the EB3A's?
Yes, substantially — a 10ms switchover against the EB3A's 30ms, three times faster. Reviewers call the C300's speed unusual for its size and price bracket.
Does the EB3A actually fail in UPS mode?
Multiple owners report it, yes — a false 'overload' shutdown at light, steady loads like a CPAP or router, documented across several forums and not reliably fixed by firmware. It's the central reason the C300 gets the edge for standby use.
Is the C300 worth $111 more than the EB3A?
If you're using this for UPS or CPAP backup, yes — you get a faster switchover, more capacity, a longer warranty, and a quieter fan, with no documented overload pattern. If your use case is short bursts of high wattage, the EB3A's output and lower cost per Wh make it the better raw deal instead.
Which one is quieter?
The C300, by half — 25dB against the EB3A's 50dB under load.
Which should I actually buy?
For UPS, CPAP, or any job where the unit needs to catch a power blink reliably, take the C300 — its speed and reliability record both favor it. For short, heavy power bursts where you're standing next to the unit anyway, the EB3A's output and price make it the practical pick.
Where to buy
Anker SOLIX C300Pick
$329.99
$329.99 · direct from Anker
Last checked 1 day ago. Prices move — check before you buy.
BLUETTI EB3A
$219.00
$219.00 · direct from BLUETTI
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.