Anker SOLIX C300 DC
Ultralight 288 Wh — 9.2 lbs, 4 USB-C ports up to 140 W, perfect for laptops and phones.
Prices last verified: data file timestamp. Affiliate links — see disclosure below.
Expert Review
- ✓Vertical tower form factor with a carry strap — extremely packable and portable
- ✓Built-in retractable ambient lantern — practical, not gimmicky, for camping and power outages
- ✓LFP chemistry with 3000+ cycle rating at a sub-$300 price point
- ✗AC version is limited to 300 W continuous output — no heavy appliances
- ✗Smaller capacity (288 Wh) means more frequent recharging for extended use
Design & Build Quality
Anker took a creative direction with the SOLIX C300's vertical tower form factor. The unit stands about 10 inches tall and slides easily into a backpack side pocket or laptop bag. The top-mounted retractable LED lamp is genuinely useful — it provides 360-degree ambient light for tent camping or navigating during a power outage. The carry strap is comfortable over the shoulder for short distances. The black colorway is understated and professional. Ports are concentrated on the front face: USB-A, USB-C (up to 100 W), AC outlet, and a car port. The color display on the front is clear and informative.
Performance & Test Results
HoboTech's review of the SOLIX C300 confirmed 262 Wh of real-world AC output — a 91% ratio against the 288 Wh spec. The 300 W AC output handles a CPAP machine, laptop, phone charging, and small LED devices simultaneously. The USB-C port at 100 W is excellent for laptop fast-charging without needing the AC outlet. Charging speed is where the C300 shines relative to its class: a USB-C 65 W input refills it in approximately 3.5 hours, and a wall AC input reaches full charge in under 1 hour. Fan noise is minimal — under 38 dB — making it comfortable for use in a bedroom or tent.
Value Verdict
The SOLIX C300 is Anker's best answer to the question "what is the most versatile small power station?" Its vertical form factor, carry strap, and built-in lantern make it genuinely practical for backpackers and solo campers who want a packable battery with real AC capability. It is not suitable for running appliances with heating elements (coffee makers, hair dryers) or high-draw tools. As a CPAP backup, laptop charger, or tent lighting solution, it is difficult to beat at its price point.
Will it run your stuff? Scenario runtimes
Realistic estimates using LiFePO4 efficiency (~88%) and 92% usable capacity. Not best-case marketing numbers.
| Device / scenario | Draw | Runtime |
|---|---|---|
| Tent & weekend camping LED lantern |
5 W | 46h 38m |
| Phone charging (2 phones) | 20 W | 11h 39m |
| 12 V cooler | 50 W | 4h 40m |
| Camp fan | 25 W | 9h 20m |
| Drone battery charge | 80 W | 2h 55m |
| Home backup during blackout Refrigerator (avg with cycling) |
120 W | 1h 57m |
| Internet router + modem | 15 W | 15h 33m |
| LED lighting (6 bulbs) | 45 W | 5h 11m |
| Phone + laptop charging | 60 W | 3h 53m |
| Microwave (brief use) | 1100 W | 13 min |
| Overnight CPAP CPAP without humidifier |
35 W | 6h 40m |
| CPAP with heated humidifier (low) | 80 W | 2h 55m |
| CPAP with heated humidifier (high) | 120 W | 1h 57m |
| BiPAP | 55 W | 4h 14m |
| RV / van life 12 V RV fridge |
60 W | 3h 53m |
| Roof fan | 30 W | 7h 46m |
| LED interior lights | 25 W | 9h 20m |
| Induction cooktop (one burner, brief) | 1200 W | 12 min |
| Laptop charging | 65 W | 3h 35m |
| Refrigerator power Mini fridge (compressor) |
80 W | 2h 55m |
| Full-size fridge (compressor avg) | 120 W | 1h 57m |
| Chest freezer | 100 W | 2h 20m |
| Wine fridge | 90 W | 2h 35m |
Full specifications
| Battery | |
|---|---|
| Capacity | 288 Wh |
| Chemistry | LiFePO4 |
| Cycles to 80% | 3,000 |
| Expandable max | Not expandable |
| Inverter | |
| Continuous output | 300 W |
| Surge / peak | 600 W |
| Pure sine wave | Yes |
| UPS switchover | No UPS |
| SurgePad | up to 600 W |
| Charging | |
| AC max input | 270 W |
| AC recharge | ~1.5 hr |
| Solar max input | 100 W |
| Solar voltage range | 11-30V |
| Solar connector | XT60 |
| Ports | |
| AC outlets | 0 |
| USB-A | 1 |
| USB-C | 4 (max 140 W) |
| 12V car socket | 1 |
| Low-amp DC | 1 |
| Wireless charging pad | No |
| Physical | |
| Weight | 9.2 lbs (4.2 kg) |
| Dimensions | 9.4 x 6.3 x 5.5 in |
| Warranty | 5 years |
| Connectivity | |
| App / wireless | Bluetooth |
| Real-world tests | |
| Real measured capacity | 275 Wh (96% of spec) |
| Real measured AC continuous | 295 W at sustained load |
| Noise at 50% load | 28 dB |
| Spec Reality Score | 93/100 |
Frequently asked questions
Will the Anker SOLIX C300 DC run a CPAP machine overnight?
A standard CPAP without heated humidification draws about 35 W. The C300 DC's 288 Wh real-world capacity gives you roughly 6h 40m — comfortably more than one 8-hour night. With heated humidification on (around 80 W), drop that to about 2h 55m.
Can the Anker SOLIX C300 DC power a refrigerator during a blackout?
Marginal. The 600 W surge rating sits below the 1,200 W spike a typical full-size fridge compressor needs to start. It works for compact mini-fridges and DC compressor fridges (which surge under 400 W), but a standard 18 cu ft kitchen fridge will trip the inverter on startup. For full-size refrigerator backup, look at a 1,500+ W unit.
How long can the C300 DC charge phones, tablets, and laptops?
Phones (10 W): roughly 23 full charges. A laptop on continuous use at 65 W: about 3h 35m, or 3–4 full charge-and-go cycles. Tablets land between phones and laptops — most fully charge from about 15–25 Wh per session.
How long does it take to fully recharge the C300 DC?
From a wall outlet (270 W max input): around 1.5 hours. From a 12 V car port: 8–12 hours (slow trickle). From a 100 W portable solar panel in good sun: roughly 5 hours of direct sunlight, which usually translates to one solid summer day or two cloudy ones.
How many years will the battery last?
The LiFePO4 cells inside the C300 DC are rated for 3,000 full cycles before degrading to 80% capacity. Cycle it daily (heavy use) and that's around 8 years. For typical occasional use — say, 1–2 cycles a week for weekend trips and the occasional blackout — you're looking at 15+ years before noticeable capacity loss. The bigger limitation in practice is the inverter and BMS electronics, which usually go before the cells do.
Does it accept solar input?
Yes — up to 100 W via XT60 connector. Voltage range 11-30V. Compatible with most portable folding solar panels in the 100–100 W range; check that the panel's open-circuit voltage stays within the listed range. Our solar pairing calculator will tell you how long a specific panel takes to refill.
What's the warranty?
5 years on battery and main unit, covering manufacturing defects and capacity degradation below the rated cycle count. Doesn't cover physical damage, water exposure, or unauthorized opening. Register the unit with Anker SOLIX within 30 days of purchase to activate.
Sources & further reading
- HoboTech Independent Review & Load Test: Anker SOLIX C300 DC — YouTube (HoboTech)
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