Anker SOLIX C300
- AC delivered · measured
269 Wh. Show source
verified source~269 Wh usable via USB at 60W (Trusted Reviews)2026-07-04- output
300 W. Show source
claimed sourceankersolix.com ↗- surge
600 W. Show source
claimed sourceankersolix.com ↗- weight
4.1 kg. Show source
claimed sourceankersolix.com ↗
Balanced
#4 of 14
in the Ultraportable / carry class
Lifted by Trust & reliability and Quiet / livability; held back by capacity & expansion.
Check current availability and pricing at the retailer.
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Anker SOLIX C300 is a ultraportable / carry model best suited to camper. It supplies 300 W of continuous AC output. BatteryRank scores it 62 out of 100 within its size class.
Our verdict on the Anker SOLIX C300
The interesting number here is not the 288 Wh or the 300 W inverter — it is that three USB-C ports each run to 140 W. Add them up and the DC side can move more power than the AC side, which is unusual and tells you what this unit is for. Charge modern laptops, cameras and phones straight off USB-C and you skip the inverter entirely, along with the conversion losses that dominate a pack this small. The wall outlet is the secondary feature.
- Everything you need to charge already uses USB-CThree ports at 140 W each will run two laptops and a camera simultaneously without the inverter ever switching on, which is the efficient path out of a 288 Wh pack.
- You are carrying it on your back rather than wheeling itAt 4.1 kg it is the lightest unit in our catalogue that still has a real AC outlet, and the 3,000 rated cycles mean it tolerates being used constantly rather than kept for emergencies.
- You want to recharge it meaningfully from the sunSolar input tops out at 100 W, so even a perfect day refills the 288 Wh pack slowly — this is a unit you top up from the wall and carry, not one you live off. The AC70 accepts 500 W of solar into a 768 Wh pack.
- Any appliance is involved, however brieflyA 300 W continuous rating with a 600 W ceiling rules out kettles, microwaves, hair dryers and space heaters as a category, not as edge cases. It runs 2,000 W continuous, enough for kitchen loads.
The honest limit: Anker sells the portability, and 4.1 kg genuinely is portable, but the 100 W solar ceiling quietly limits what that portability is good for. A unit you can carry anywhere is most useful where there is no wall socket, and this is the one place it recharges slowest. The weight and the off-grid use case do not point the same direction.
What our data can’t tell you: The only independent capacity measurement we hold was taken over USB at 60 W, which bypasses the inverter completely. It tells you nothing about how much energy reaches the AC outlet, and we deliberately keep it out of any comparison with AC-measured units rather than flattering this one.
BatteryRank Engineering Team · Last reviewed · Method
Capacity truth
The watt-hour number on the box isn't what reaches your devices. Rated on the label vs what actually leaves an outlet.
288 Wh. Show source
claimed sourceankersolix.com ↗2026-07-04The marketing number — total cell capacity.
269 Wh. Show source
verified source~269 Wh usable via USB at 60W (Trusted Reviews)2026-07-04~269 Wh usable via USB at 60W (Trusted Reviews) · 7% below the label
Also independently measured
- AC inverter efficiency
71.5 %. Show source
verified source~71.5% AC round-trip / ~80.8% DC round-trip (Trusted Reviews)2026-07-04- Fan noise
25 dB. Show source
verified source25 dB @3.3ft (portablepowercompare)2026-07-04- AC charge time
66 min. Show source
verified source~66 min full at ~330W (Trusted Reviews)2026-07-04
~71.5% AC round-trip / ~80.8% DC round-trip (Trusted Reviews)
25 dB @3.3ft (portablepowercompare)
~66 min full at ~330W (Trusted Reviews)
What it can run
Same sourced device assumptions used by our calculators, applied to this model's usable AC energy. Actual runtime varies with load, temperature, and standby draw.
| Device | Estimated runtime | Sourced assumption |
|---|---|---|
| CPAP (humidifier off) | about 3.7 nights | 9 W · |
| CPAP (heated humidifier on) | about 0.6 nights | 56 W · |
| Refrigerator (full-size) | about 4.3 hours | 180 W × 35% duty cycle · |
| Wi-Fi router + modem | about 15 hours | 18 W · |
| Laptop (65W charger) | about 8.3 hours | 65 W × 50% duty cycle · |
| Phone (one full charge) | about 13 full charges | 20 W · |
Who it fits
Mechanical matches against this model's own sourced specs — never invented sentiment, never a guess on a spec we don't have.
4.1 kg with 100 W solar input → carry-in, solar-rechargeable
How it scores
Four buyer pillars over seven sub-scores — computed from sourced data with a published formula, price-independent by design.
Power
Battery-side usable capacity and how much you can run at once.
Usable watt-hours and how far you can grow it with add-on batteries, versus its size class.
Continuous and surge wattage, outlet count, and USB-C fast-charging.
Trust
Owner reputation, safety record, warranty, and build durability.
Owner ratings, brand reputation, recall record, and warranty backing.
Rated cycle life, warranty length, cell chemistry, and weather sealing.
Charging
Wall and solar recharge speed.
Wall recharge speed, solar input, and multi-source charging.
Livability
Lightweight, portable, and quiet enough to live with.
Weight, footprint, handle, and wheels, versus its size class.
Fan noise under load — quieter is better for bedrooms and CPAP use.
How this score is computed
The BatteryRank score is computed from sourced data with a published formula — ranked by data, not lab testing. Seven sub-scores blend into a 0–100 composite, grouped into four buyer pillars. Price is deliberately not a scoring input: prices move daily, so value intelligence lives in the price section above, judged against this model's own history.
| Pillar | Built from |
|---|---|
| Power | Capacity & expansion + Output & versatility |
| Trust | Trust & reliability + Durability & longevity |
| Charging | Charging & solar |
| Livability | Portability + Quiet / livability |
Scores are cohort-relative — each model is ranked against others in its size class. Missing inputs renormalize out rather than scoring zero (a model is never penalized for a spec nobody in its class publishes), and any figure resting on a documented estimate is tagged est. A full methodology page is coming.
Full specifications
Manufacturer-claimed unless marked verified (FCC/UL/DOE/lab). Tap or focus a figure to view its source.
Capacity & battery
- Battery-side usable capacity
288 Wh. Show source
claimed sourceankersolix.com ↗- Rated cycle life
3,000 cycles. Show source
claimed sourceankersolix.com ↗- Battery chemistry
LiFePO4. Show source
claimed sourceankersolix.com ↗- Rated capacity
288 Wh. Show source
claimed sourceankersolix.com ↗- Cycle-life threshold
80 %. Show source
claimed sourceankersolix.com ↗
Energy available from the battery before output-conversion losses. AC-delivered capacity is shown separately in Capacity Truth.
How many full charge-and-drain cycles before the battery drops to its rated threshold (shown alongside — brands rate to different thresholds, so never compare bare cycle counts).
The type of battery cell. LiFePO4 (LFP) cells last far more cycles and are more thermally stable than older lithium-ion (NMC) cells.
The battery's nameplate energy capacity — the headline number on the box. Battery-side usable and AC-delivered capacity are shown separately.
The remaining-capacity level the cycle rating is measured to. 3,000 cycles to 80% is a stronger battery than 3,000 cycles to 70% — always read the two numbers together.
Power output
- Continuous power output
300 W. Show source
claimed sourceankersolix.com ↗- Surge power output
600 W. Show source
claimed sourceankersolix.com ↗- AC outlets
3 outlets. Show source
claimed sourceankersolix.com ↗- USB-A ports
1 ports. Show source
claimed sourceankersolix.com ↗- USB-C ports
3 ports. Show source
claimed sourceankersolix.com ↗- USB-C max output
140 W. Show source
claimed sourceankersolix.com ↗- 12V car ports
1 ports. Show source
claimed sourceankersolix.com ↗- DC barrel ports
0 ports. Show source
claimed sourceankersolix.com ↗- Max combined output
300 W. Show source
claimed sourceankersolix.com ↗
The most power you can draw at once, sustained — this has to be higher than the running wattage of whatever you're plugging in.
A brief power spike the unit can absorb when a device first switches on — matters for things with motors or compressors, like fridges.
How many standard wall-style outlets are built in.
How many USB-A ports are built in, for charging older phones, lights, and accessories.
How many USB-C ports are built in — check the per-port wattage below if you need fast charging for a laptop.
The fastest a single USB-C port can charge a device — relevant for laptops and fast-charging phones.
How many car-socket (cigarette-lighter) style 12V outputs are built in — what CPAPs and car fridges plug into for the most efficient overnight running.
How many round barrel-style DC outputs are built in, used by routers, some lights, and older electronics.
The most power the unit can deliver across ALL ports at the same time — can be lower than the AC rating plus every USB port added up.
Charging & solar
- Max solar input
100 W. Show source
claimed sourceankersolix.com ↗
The most solar panel wattage the unit can accept — undersized panels just mean slower charging, not damage, but oversizing this is wasted money.
Reliability & durability
- UPS switchover time
10 ms. Show source
claimed sourceankersolix.com ↗
How fast the unit takes over when grid power cuts out. Under ~20ms is fast enough that most electronics — including many CPAP machines — won't even blip.
Size & portability
- Weight
4.1 kg. Show source
claimed sourceankersolix.com ↗
How much the unit weighs on its own, without accessories — relevant for portability and carrying it up stairs during an outage.
What reviewers & owners report
Named outlets and marketplaces, each rating credited where it was published.
- Very portable/light (~4.1 kg) — Across reviewers ·
- flexible charging inputs — Across reviewers ·
- strong 140W two-way USB-C — Across reviewers ·
- built-in light bar — Across reviewers ·
- durable LFP — Across reviewers ·
- 5-yr warranty on AC model — Across reviewers ·
- AC couldn't sustain rated 300W in test (~255W measured) — Across reviewers ·
- lower AC-path efficiency than rivals — Across reviewers ·
- small 288Wh capacity — Across reviewers ·
- premium price per Wh — Across reviewers ·
- Wirecutter: not a current pick / blocked to fetch
- Popular Mechanics: no dedicated review found / blocked
- None confirmed this pass — no accessible measurement-channel review of the C300 located — YouTube reviewers ·
Brand reputation: Reddit/forum sentiment not retrievable this pass; Anker brand reputation strong; no model-specific station reliability concerns surfaced
Sources: Trusted Reviews (no numeric, measured AC/eff) https://www.trustedreviews.com/reviews/anker-solix-c300; CNET blocked; Tom's Guide none; PCMag blocked; OutdoorGearLab none; Popular Mechanics none; TechRadar none; Wirecutter blocked; Engadget none; YouTube not retrievable; Reddit not retrievable; CPSC empty for SOLIX (2026-07-04)
What else to consider instead of the Anker SOLIX C300
Same or adjacent size class, ordered by the price-independent composite. Every alternative is better than the Anker SOLIX C300 at something and worse at something else, so each row states both halves — each one arithmetic on two sourced readings, with a dimension skipped rather than guessed when either side is missing a figure.
- Goal Zero Yeti 300score 71 · same size class
- Why you would switch
- The Goal Zero Yeti 300 carries 17% more continuous output (350 W vs 300 W), which decides what it can run at all.
- What you give up
- The Anker SOLIX C300 is 34% lighter (4.1 kg vs 6.2 kg).
- EcoFlow RIVER 3 Plusscore 65 · same size class
- Why you would switch
- The EcoFlow RIVER 3 Plus carries 100% more continuous output (600 W vs 300 W), which decides what it can run at all.
- What you give up
- The Anker SOLIX C300 delivers 11% more usable AC energy (269 Wh vs 243 Wh).
- Bluetti Elite 30 V2score 63 · same size class
- Why you would switch
- The Bluetti Elite 30 V2 carries 100% more continuous output (600 W vs 300 W), which decides what it can run at all.
- What you give up
- The Anker SOLIX C300 delivers 10% more usable AC energy (269 Wh vs 245 Wh).
- EcoFlow RIVER 3score 55 · same size class
- Why you would switch
- The EcoFlow RIVER 3 is 14% lighter (3.54 kg vs 4.1 kg).
- What you give up
- The Anker SOLIX C300 delivers 29% more usable AC energy (269 Wh vs 208 Wh).
- Jackery Explorer 300score 54 · same size class
- Why you would switch
- The Jackery Explorer 300 is 17% lighter (3.4 kg vs 4.1 kg).
- What you give up
- The Anker SOLIX C300 delivers 8% more usable AC energy (269 Wh vs 248 Wh).
Quick answers
Each answer restates a sourced figure from elsewhere on this page — nothing new, nothing guessed.
- How much does the Anker SOLIX C300 weigh?
- 4.1 kg (9 lb), manufacturer-claimed, without accessories.
- What are the dimensions of the Anker SOLIX C300?
- 165 × 160 × 241 mm (6.5 × 6.3 × 9.5 in), length × width × height, manufacturer-claimed.
- How much capacity does the Anker SOLIX C300 deliver through an AC outlet?
- About 269 Wh of the rated 288 Wh reaches an AC outlet from a full charge — measured in independent testing.
- How many watts can the Anker SOLIX C300 output?
- 300 W continuous AC output and 600 W surge output, manufacturer-claimed. Appliance startup demand must stay within the relevant limit.
- How much solar input can the Anker SOLIX C300 accept?
- 100 W maximum solar input, manufacturer-claimed. Actual harvest depends on panel compatibility, sun, orientation, temperature, and conversion losses.
- What is the cycle-life rating of the Anker SOLIX C300?
- 3,000 cycles to 80% remaining capacity, manufacturer-claimed. A cycle rating is not a calendar-life guarantee.
- Can the Anker SOLIX C300 work as a UPS?
- Its manufacturer-claimed transfer time is 10 ms. Confirm that your connected equipment tolerates that transfer time; this is not the same as a zero-transfer online UPS.