Anker SOLIX C300 Buyer’s Guide: Verified Specs, Limits & Current Buying Advice

The Short Answer

The Anker SOLIX C300 is a practical small power station for buyers who value compact size, fast charging, and high-power USB-C more than raw battery capacity. Its 288Wh battery is large enough for phones, tablets, cameras, routers, lights, a small fan, or several laptop charges, while the 300W inverter covers many small AC devices.

The limit is equally important: this is not a general home-backup unit. Appliances with sustained loads above 300W are outside the normal AC rating, and motor-driven devices can fail to start even when their average running wattage looks acceptable. Buy the C300 for portable electronics and modest emergency loads; move up to a larger model if you need refrigeration, cooking, heating, medical-device backup without careful load planning, or multi-day autonomy.

Anker SOLIX C300 Specifications

The current Anker manual identifies the AC-equipped C300 as model A1722. These are the specifications that should control the article and the product block.

Specification	Verified value
Battery capacity	288Wh
Battery chemistry	LiFePO₄ (LFP)
AC output	300W continuous, 120V/2.5A
SurgePad	Up to 600W for compatible resistive heating loads; not a 600W continuous rating
Total multi-port output	360W maximum across supported outputs
AC charging input	330W maximum
Solar/car input	11–28V, 8.2A, 100W maximum
Bidirectional USB-C input	USB-C2, up to 140W
UPS transfer time	Less than 10ms under the manual’s stated conditions
Dimensions	6.5 × 6.3 × 9.5in
Weight	9.1lb
Connectivity	Wi-Fi and Bluetooth app control
Warranty	Current U.S. product page lists 5 years; confirm retailer and regional eligibility

---

What the C300 Can Power

The simplest rule is to compare the device’s input label or measured wattage with the C300’s 300W continuous AC limit. Leave headroom for startup surges and for loads that vary during operation. A 250W device may technically fit under the rating, but it leaves little margin for a compressor, pump, or another device turning on.

Good matches include phones, tablets, cameras, drones, many laptops, Wi-Fi routers, LED lighting, small fans, CPAP machines with careful runtime planning, and other low-power electronics. Some televisions, monitors, projectors, and small coolers may also work when their measured running and startup demand remain within the unit’s limits.

Poor matches include electric kettles, coffee makers, hot plates, air fryers, hair dryers, space heaters, full-size microwaves, and most high-draw kitchen appliances. Those loads commonly exceed 300W before any other device is connected.

300W Output vs. 600W SurgePad

The 600W figure does not double the inverter’s normal capacity. Anker limits SurgePad to compatible heating equipment that can tolerate reduced voltage. The manual specifically warns against using it with precision instruments and voltage-sensitive equipment, and it is unavailable in bypass mode.

Do not use SurgePad as evidence that the C300 can reliably start a refrigerator, pump, or other motor load. For those devices, measure both running watts and startup demand. If either falls outside the supported range, choose a power station with a larger conventional inverter and documented surge capacity.

Estimated Runtime

Runtime depends on the battery state, temperature, inverter efficiency, power factor, and the device’s real load. For planning, the estimates below assume that 85% of the 288Wh battery reaches an AC appliance:

Usable AC energy = 288Wh × 0.85 = 244.8Wh

Estimated runtime = 244.8Wh ÷ device watts

Example continuous load	Calculation	Estimated runtime
10W	244.8Wh ÷ 10W	About 24.5 hours
30W	244.8Wh ÷ 30W	About 8.2 hours
50W	244.8Wh ÷ 50W	About 4.9 hours
100W	244.8Wh ÷ 100W	About 2.4 hours
200W	244.8Wh ÷ 200W	About 1.2 hours
300W	244.8Wh ÷ 300W	About 0.8 hours

These are planning estimates, not measured PPS results. Very light loads can be affected by the station’s own idle consumption, while heavy AC loads can deliver less usable energy than the 85% assumption. USB-C and DC loads may run more efficiently because they avoid the AC inverter.

For a device-specific estimate, use the Pure Power Solar runtime calculator and enter the device’s measured watts rather than relying on its maximum nameplate rating.

Battery, Size, and Everyday Design

The C300 uses a 288Wh LFP battery. LFP chemistry is a sensible fit for a portable station that may see frequent cycling or long periods in an emergency kit, but battery life still depends on temperature, storage state of charge, charging habits, and how the product is used. Anker markets the platform for long service life; this draft does not repeat a cycle-count claim that was not confirmed in the current manual reviewed for this update.

At 9.1lb and 6.5 × 6.3 × 9.5in, the C300 occupies far less space than a 1kWh-class power station. The upright layout keeps the footprint compact, though it also means you should allow ventilation space and avoid covering the fan openings. Anker advertises quiet operation around 25dB under suitable conditions, but fan noise changes with load and charging rate.

The Anker app connects through Wi-Fi or Bluetooth for monitoring and settings. App control is useful when the unit is under a desk, inside a vehicle setup, or being used as a small UPS, but core power functions should not depend on an internet connection.

Ports and Output Limits

Port or circuit	Maximum	Important limitation
Three AC outlets	300W total, 120V/2.5A	The rating is shared; it is not 300W per outlet
12V car socket	12V/10A	Check the connected device’s startup and cable requirements
USB-A	12W	Best for basic USB devices
USB-C1	15W output	Output only
USB-C2	Up to 140W	Bidirectional charging and output
USB-C3	Up to 140W output	Output only
All outputs combined	360W maximum	Individual and combined port limits still apply

A port’s maximum is not a guaranteed constant rate. USB-C devices negotiate power with the station, and reaching 140W requires a compatible device and cable. The three AC receptacles provide convenience, but they all share the same 300W inverter.

Charging the Anker SOLIX C300

The C300 supports several useful charging paths. The fastest option is AC wall charging. Solar and vehicle charging are slower but more useful away from the grid, while USB-C can simplify travel when you already carry a suitable high-power charger.

Charging method	Verified input limit	Planning guidance
AC wall charging	330W maximum	Anker advertises 80% in 50 minutes; a full charge takes longer because charging tapers
Solar	11–28V, 8.2A, 100W maximum	Theoretical minimum at 100W is 2.88 hours; plan roughly 4–6 peak-sun hours in good conditions
USB-C2	140W maximum	Theoretical minimum is 2.06 hours; allow roughly 2.5–3.5 hours with a compatible charger and cable
Vehicle charging	Through the 100W solar/car input path	Use Anker’s compatible cable and do not exceed the input voltage/current limits

AC Charging

The manual lists up to 330W of AC charging input. Anker’s current product page advertises an 80% recharge in 50 minutes. That is a manufacturer claim under specified conditions, not a promise that every charging session will finish at the same rate. Battery temperature, starting charge, power settings, and the normal taper near full charge all affect total time.

Solar Charging

Solar input is limited to 11–28V, 8.2A, and 100W through the XT60 input. A panel or array must fit inside all three electrical limits; a “100W” label by itself does not establish compatibility. Cold-weather open-circuit voltage also matters because panel voltage can rise below its standard test temperature.

Use the solar panel sizing guide before combining panels. If charging is inconsistent, check connectors, polarity, shade, and panel voltage with the solar-panel troubleshooting guide.

USB-C and Vehicle Charging

USB-C2 is the only bidirectional USB-C port. With a compatible USB-C Power Delivery charger and cable, it can accept up to 140W. USB-C1 and USB-C3 are output-only, so plugging a charger into either one will not recharge the station.

Vehicle charging uses the solar/car input path and requires the correct cable, which Anker lists separately. Do not improvise a connector or assume any automotive cable is electrically compatible.

UPS and Pass-Through Use

Anker lists a transfer time of less than 10ms when the C300 is used as an uninterruptible power supply. That can suit routers, network equipment, and many desktop electronics, but no sub-10ms consumer power station should be treated as a universal substitute for purpose-built medical or data-center power protection.

The manual lists 300W AC output in bypass mode, and SurgePad is unavailable while bypassing AC power. Keep the connected load below the documented limit, allow ventilation, and test the exact device before relying on the setup. Critical medical equipment should follow the equipment manufacturer’s backup-power guidance.

Best Uses for the C300

• Travel and vehicle kits where 9.1lb is easier to manage than a larger power station.
• Charging phones, tablets, laptops, cameras, drones, and USB-C equipment.
• Running a router, modem, lights, or a small fan during a short outage.
• Remote work and photography setups that benefit from 140W USB-C.
• Small emergency kits where compact storage matters more than multi-day runtime.

Who Should Skip It

• Buyers who need more than 300W of normal AC output.
• Anyone expecting dependable refrigerator, pump, cooking-appliance, or space-heater operation without measuring both startup and running demand.
• Users who need several days of backup from one battery.
• Buyers who need more than 100W of solar input for faster off-grid recovery.
• Anyone seeking an AC-free, USB-focused unit; the lighter C300 DC may be a better match.

Anker SOLIX C300 vs. C300 DC

The similar names hide an important difference. This C300 includes a 300W AC inverter and three AC outlets. The C300 DC is built around DC and USB outputs and does not provide standard AC receptacles. The DC model can be the better travel choice when every device already charges from USB-C, USB-A, or 12V, while the AC C300 is more flexible for small wall-plug appliances.

Do not reuse specifications, product blocks, or images between the two models without checking the exact model and SKU. The same caution applies to the C300X, which is a different product.

See the Anker SOLIX C300 DC buyer’s guide for the DC-only alternative, or compare the smaller Anker SOLIX C200 DC buyer’s guide if lower capacity is acceptable.

Price and Availability

Anker’s U.S. product page and Amazon listing are shown below. Retailer inventory may differ, so I recommend checking both listings for availability and price before purchase.

Frequently Asked Questions

Can the Anker SOLIX C300 run a refrigerator?

Possibly, but only if the refrigerator’s measured running load and startup demand fit the C300’s supported AC limits. A refrigerator that averages less than 300W can still draw much more when its compressor starts. SurgePad is intended for compatible heating loads and should not be treated as refrigerator surge capacity.

Can the C300 run a CPAP machine?

Many CPAP machines draw less than 100W, so the C300 may be suitable for a limited number of hours. Runtime changes substantially with heated humidification, heated tubing, pressure settings, and AC-conversion losses. Use the device’s measured wattage, calculate with a conservative efficiency assumption, and follow the medical-device manufacturer’s backup-power guidance.

Can I use any solar panel?

No. The connected panel or array must stay within 11–28V, 8.2A, and 100W, and it must use the correct connector and polarity. Confirm the panel’s open-circuit voltage in expected temperatures before connecting it.

Can the C300 be used while it is charging?

The manual documents UPS/bypass operation, so supported loads can remain connected during AC input. Keep total AC output within the 300W bypass limit. SurgePad is unavailable in bypass mode, and specific charging/output combinations may be limited by the unit’s thermal and total-power controls.

Is the Anker SOLIX C300 waterproof?

The current manual reviewed for this update does not provide an IP rating. Keep the station dry, provide ventilation, and protect it from rain, condensation, dust, and standing water.

How long is the warranty?

Anker’s current U.S. product page lists a five-year warranty. Coverage can depend on the seller, region, registration, and warranty terms in force when purchased, so confirm eligibility before buying from a marketplace listing.

Final Verdict

The Anker SOLIX C300 is a strong compact option when 288Wh and 300W cover the intended load. Its advantages are modest weight, a small footprint, fast AC charging, a 140W bidirectional USB-C port, app connectivity, and useful UPS behavior. The tradeoffs are limited battery capacity, a 100W solar ceiling, and an inverter that is unsuitable for most heating and cooking appliances.

Buy it for portable electronics, a router, lights, a small fan, travel, or short outages. Skip it if the plan depends on refrigeration without measured startup data, high-draw appliances, rapid solar recovery, or multi-day backup. If stock is limited, compare alternatives by verified continuous output, usable capacity, solar-input voltage, charging time, weight, warranty, and exact retailer SKU—not by a headline surge number alone.

Last update on 2026-09-18 / Affiliate links / Images from Amazon Product Advertising API