Anker SOLIX C300 DC Buyer’s Guide: 288Wh DC Power Explained

The Anker SOLIX C300 DC is a compact 288Wh, 300W portable power station built for USB-C, USB-A, and compatible 12V devices. It has four USB-C ports, two USB-A ports, and a 12V car socket, but it does not have a household AC outlet or internal AC inverter.
That design makes the C300 DC a strong match for phones, laptops, cameras, drones, lights, routers, and 12V travel gear. It is a poor match for coffee makers, microwaves, standard refrigerators, and other appliances that require an AC plug. Do not confuse it with the separate Anker SOLIX C300, which has the same 288Wh capacity and 300W rating but adds AC outlets.
Pure Power Solar has not tested this model firsthand. This guide uses Anker’s published specifications, current support information, and clearly labeled runtime estimates to explain where the C300 DC fits.

Anker SOLIX C300 DC Specifications

Feature	Specification
Model	Anker SOLIX C300 DC Portable Power Station, A1726
Battery capacity	288Wh
Battery chemistry	LiFePO4 (LFP)
Battery cycle rating	More than 3,000 cycles to 80% remaining capacity, according to Anker
Maximum combined output	300W DC; no AC output
USB-C ports	4 total: two 140W two-way input/output ports, one 100W output port, and one 15W output port
USB-A ports	2 total; up to 12W each when used separately
USB-A and USB-C4 shared output	20W maximum when used together
12V output	Car socket, 12V/10A, up to 120W
USB-C recharging	Through USB-C2 and USB-C3; full-speed charging requires two compatible 140W chargers
Solar input	Up to 100W; compatible panel must operate within 11–28V and use an XT60 connector
Weight	6.17lb / 2.8kg
Dimensions	Approximately 7.9 × 4.9 × 4.7in / 20.0 × 12.4 × 12.0cm
App control	Anker app through Bluetooth or Wi-Fi
Warranty	36 months under Anker’s current U.S. policy, subject to eligibility and purchase terms
Included items	C300 DC, USB-C-to-USB-C cable, safety instructions, warranty card, and digital user manual access; wall charger not included

What Can the Anker SOLIX C300 DC Power?

The C300 DC can power devices that connect through USB-C, USB-A, or its 12V car socket and remain within the relevant port limit and the station’s 300W combined-output limit. A device with only a standard household plug cannot connect directly because the unit has no AC outlet.

Good Matches for the C300 DC

• Phones, tablets, e-readers, handheld game systems, and other USB devices
• USB-C laptops that accept Power Delivery within the selected port’s limit
• Cameras, drones, rechargeable camera batteries, and portable lighting
• Routers, hotspots, and compatible USB-powered networking equipment
• Compatible 12V coolers, fans, air pumps, and travel accessories that draw no more than 120W from the car socket
• Several smaller devices at once, provided their combined demand stays within the unit’s limits

What It Cannot Power Directly

• Coffee makers, microwaves, space heaters, and other AC appliances
• A standard refrigerator or CPAP using only a household AC plug
• Equipment that exceeds the individual port limit or 300W combined output
• Devices that require a connection type or voltage the C300 DC does not provide

Estimated Runtime

Battery capacity and output wattage describe different things. The 288Wh rating is stored energy, while 300W is the maximum combined rate at which the unit can deliver DC power.

For a practical estimate, the table below assumes that about 85% of the rated battery capacity reaches a connected DC or USB device after conversion losses. That equals about 245Wh of usable energy. Actual results vary with the device, cable, charging protocol, temperature, battery condition, and changing power draw.

Formula: estimated runtime = 288Wh × 0.85 ÷ average device wattage

Average device load	Estimated runtime	Example
10W	About 24.5 hours	Small light, fan, or network device
20W	About 12.2 hours	Light electronics use
40W	About 6.1 hours	Moderate laptop or charging load
60W	About 4.1 hours	Higher laptop workload or compatible DC device
100W	About 2.4 hours	High sustained USB-C load
120W	About 2.0 hours	Maximum-rated 12V car-socket load; actual runtime may be lower

For a CPAP machine, use the device’s average DC wattage rather than assuming a fixed number of nights. Heated tubing and humidification can raise energy use substantially. Enter the measured or documented average draw in the Pure Power Solar portable power station runtime calculator for a more useful estimate.

Battery Capacity and Lifespan

The C300 DC uses a LiFePO4 battery. Anker rates it for more than 3,000 charge cycles before the battery falls to 80% of its original capacity. Reaching that endpoint does not mean the battery stops working; it means a full charge stores less energy than when the unit was new.

At 288Wh, the C300 DC offers more reserve than the 192Wh C200 DC while remaining focused on portable electronics. It is still a small-capacity power station, so buyers planning for multi-day outages or continuous high loads should consider a larger model. See the Pure Power Solar battery cycle life guide for help comparing longevity claims.

Portability and Design

The C300 DC weighs 6.17lb and measures approximately 7.9 × 4.9 × 4.7in. Anker says it is 30% smaller than comparable power stations and offers an optional shoulder strap, sold separately. Its compact shape is useful for vehicle storage, campsites, photography kits, and mobile work setups.

The tradeoff is connection flexibility. Removing the AC inverter keeps the design focused on DC power, but every device must use USB-C, USB-A, or the 12V socket. The built-in display shows battery and operating information, while the Anker app provides additional monitoring and controls through Bluetooth or Wi-Fi.

How to Charge the Anker SOLIX C300 DC

Charging method	Maximum or claimed speed	What you need	Important limit
Dual USB-C PD 3.1	Up to 280W combined; Anker claims 80% in about 1 hour	Two compatible 140W USB-C chargers and properly rated cables	Input uses USB-C2 and USB-C3; chargers are not included
Single USB-C charger	Varies with charger output	USB-C PD charger rated at 30W or higher for normal activation and charging	Slower than dual 140W charging
Solar	Up to 100W	11–28V solar panel with XT60 connector	PS30/other 5V/3A USB-C panels, PS200, and PS400 are not compatible
Vehicle	Supported by Anker	Compatible car-charging cable connected as directed by Anker	Verify the correct cable and input connection before use

USB-C Wall Charging

The fastest supported method uses the two 140W two-way USB-C ports, USB-C2 and USB-C3. Anker states that two compatible 140W chargers can provide up to 280W total input and recharge the battery to 80% in about one hour. Because the box includes only one USB-C cable and no wall charger, reaching that speed requires additional compatible equipment.

A lower-wattage USB-C PD charger will recharge the unit more slowly. Anker’s current product information recommends at least a 30W USB-C PD charger for normal charging, while initial activation may work with an 18W or higher compatible charger.

Solar Charging

The C300 DC accepts up to 100W of solar input. The panel must operate between 11–28V and connect through XT60. Check the panel’s open-circuit voltage, operating voltage, connector, and polarity before connecting it; a 100W label alone does not guarantee compatibility.

Anker recommends its 60W or 100W solar panels. The company says the C300 DC is not compatible with the SOLIX PS30, other 5V/3A USB-C solar panels, the PS200, or the PS400. For more help, use the Pure Power Solar solar panel sizing guide for power stations.

Pass-Through Charging

Anker’s public product page does not clearly document every simultaneous input-and-output combination. Do not assume unrestricted pass-through operation for continuous or critical equipment. Confirm the exact ports, power limits, and operating behavior in the current A1726 guide before relying on a specific setup.

Price Availability and Value

The C300 DC’s value depends on whether your devices already use USB-C or 12V power. It combines a 288Wh LFP battery, two 140W two-way USB-C ports, a 120W car socket, app control, and low weight. The limitation is equally important: it cannot power AC appliances directly.

Anker’s direct U.S. listing was marked sold out when this draft was prepared, while third-party price and availability can change. Compare the current price with both the smaller C200 DC and compact models that include AC outlets. Avoid paying a premium for the DC-only design unless its ports match the equipment you plan to use.

Best Uses for the C300 DC

Camping and Road Trips

Charge phones, cameras, drones, lights, and compatible 12V travel equipment without carrying a larger AC-equipped station.

Remote Work and Mobile Electronics

Recharge a USB-C laptop, phone, hotspot, tablet, and accessories. Confirm the laptop’s Power Delivery requirements and cable rating first.

Photography and Drone Kits

Consolidate charging for several battery-powered devices while keeping the combined demand below 300W.

Short Outages

Maintain communication, networking, lighting, and selected DC equipment. The 288Wh battery is intended for targeted loads rather than whole-home backup.

Compatible CPAP Setups

A CPAP may work through a compatible manufacturer-approved DC cable. Estimate runtime from its average DC draw and account for humidifier and heated-tube use. Do not rely on a universal one- or two-night claim.

Who Should Skip It?

• Anyone who needs household AC outlets
• Users planning to run cooking appliances, heaters, standard refrigerators, or power tools
• People who need more than 288Wh for long outages or multi-day off-grid use
• Buyers who do not already own compatible USB-C chargers and cables
• Users whose solar panel falls outside the 11–28V and XT60 requirements

Pros and Cons

Pros	Cons
288Wh LiFePO4 battery	No AC outlet or internal inverter
Two 140W two-way USB-C ports	Full-speed charging requires two separate 140W chargers
300W combined DC output	Only 288Wh for extended backup
Four USB-C ports, two USB-A ports, and a 12V socket	USB-A and USB-C4 share a 20W limit when used together
Up to 100W solar input	Narrow solar voltage and connector requirements
6.17lb compact design	Wall charger is not included
36-month U.S. warranty for A1726	Not intended for normal AC appliances

Anker SOLIX C300 DC vs Anker SOLIX C300

The C300 DC and C300 share the same basic 288Wh capacity and 300W continuous-output class, but they serve different connection needs. The C300 DC prioritizes USB and 12V power. The C300 adds household AC outlets and a 600W SurgePad mode for certain loads.

Feature	C300 DC	C300
Battery capacity	288Wh	288Wh
Continuous output	300W DC combined	300W AC output
AC outlets	None	Three AC outlets
High-power USB-C	Two 140W two-way ports	One 140W two-way port
Solar input	Up to 100W	Up to 100W
Fast-recharge claim	80% in about 1 hour with dual 140W USB-C input	80% in about 50 minutes from a wall outlet
U.S. warranty	36 months	60 months
Best fit	USB-C, USB-A, and 12V equipment	Mixed equipment including devices with AC plugs

Choose the C300 DC when most of your equipment already uses USB-C or 12V power and lower weight matters. Choose the C300 when you need standard wall outlets. For less capacity and weight, compare the Anker SOLIX C200 DC buyer’s guide.

Final Verdict

The Anker SOLIX C300 DC is a practical choice for buyers who want a compact battery dedicated to USB-C, USB-A, and compatible 12V equipment. Its 288Wh LFP battery, 300W combined output, two 140W two-way USB-C ports, and 6.17lb weight fit travel, camping, photography, remote work, and targeted emergency charging.

Skip it if you need AC outlets, household-appliance backup, a wall charger in the box, or enough capacity for long outages. The C300 DC makes the most sense when its exact ports match your equipment and its current price compares favorably with AC-equipped alternatives.

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Anker SOLIX C300 DC FAQs

Does the Anker SOLIX C300 DC have AC outlets?

No. It provides USB-C, USB-A, and 12V DC outputs but no household AC outlet. The separate Anker SOLIX C300 includes AC outlets.

Can the C300 DC charge a laptop?

Yes, if the laptop accepts USB-C Power Delivery within the selected port’s limit. The two highest-power USB-C ports support up to 140W each with compatible devices and cables.

Can the C300 DC run a refrigerator?

Not a typical household refrigerator with an AC plug. It may power a compatible 12V cooler through the car socket if the cooler stays within the 12V/10A, 120W limit.

How long can it power a CPAP?

Runtime depends on the CPAP’s average DC wattage and whether humidification or heated tubing is used. Using an estimated 245Wh of usable DC energy, divide 245Wh by the CPAP’s average watts to estimate hours.

What chargers provide the fastest recharge?

Anker specifies two compatible 140W USB-C chargers connected to USB-C2 and USB-C3 for up to 280W combined input and about 80% recharge in one hour. Those chargers are not included.

Can it recharge from solar panels?

Yes. It accepts up to 100W from a panel operating within 11–28V and using an XT60 connector. Verify voltage, connector, and polarity before use.

Does it support pass-through charging?

Do not assume every input-and-output combination is supported. Check the current A1726 guide for the exact ports and power limits involved in your setup.

Is the C300 DC waterproof?

Anker does not publish a waterproof IP rating for this model. Keep it protected from rain, splashes, snow, and standing water.

How long is the warranty?

Anker’s current U.S. warranty policy lists 36 months for the C300 DC model A1726, subject to the policy’s purchase, proof-of-purchase, and eligibility requirements.

Last update on 2026-10-15 / Affiliate links / Images from Amazon Product Advertising API