Anker SOLIX C300 DC: What Dual USB-C 280W Charging Requires
The Anker SOLIX C300 DC can accept up to 280W through two USB-C connections, but a single cable does not unlock that figure. Its A1726 user guide assigns up to 140W of input to USB-C2 and another 140W to USB-C3. Reaching the combined ceiling requires suitable power on both connections. Start by checking the charger you already own; replacing the station will not fix a charger that cannot supply the required power.
VibePicks may earn a commission if you buy through links on this page, at no extra cost to you.
A1726 charging figures from the user guide
Use the two bidirectional ports
USB-C2 and USB-C3 support input and output. USB-C1 and USB-C4 are output-only ports, so connecting a wall charger to either is not the documented recharge route. Check the printed port labels rather than relying on a connector’s position in a product photograph.
Anker specifies a 140W adapter and 140W cable for its best USB-C charging experience. The input table includes 28V at 5A for each 140W port. A USB-C connector alone does not establish that an adapter can supply that profile. Read its output label and documentation, and use the cable rating as a separate check. Follow the manual’s accessory and safety requirements; a higher headline wattage on a charger is not sufficient evidence of compatibility.
This guide covers C300 DC, model A1726. It has no AC outlet. The C300 AC model is a different product; do not transfer its ports or recharge specifications to this one.
A multiport charger needs a power-allocation check
A charger advertised as 140W total may deliver that rating to one port while dividing its available power when two ports are connected. That does not make it a two-times-140W supply. Look for the manufacturer’s simultaneous-port allocation table, including which combinations reduce individual outputs.
For planning, imagine two connections that each successfully negotiate 65W. Their combined input ceiling would be 130W, not 280W. This is an illustrative budget, not a compatibility test of a particular charger. Two independent 140W supplies have a different potential budget, but each still needs the appropriate cable and supported input profile.
If your goal is convenient overnight recharging, a lower input may meet your needs without buying extra adapters. If you have short access to a campsite outlet, input power matters more. Compare the complete adapter-and-cable cost with the time available. Our USB-C laptop power guide explains why port limits and a device’s actual demand are separate questions.
Why 288Wh divided by 280W is not a full-charge promise
The simple calculation 288Wh ÷ 280W is about 1.03 hours, or 62 minutes. It assumes constant maximum input and no charging losses. It is a theoretical energy-transfer floor for the nominal capacity, not a measured empty-to-full charging time. Real charging can slow near full capacity, and temperature, starting charge and connected loads can affect the result.
Use the screen’s input reading to see what your setup is accepting instead of inferring it from the adapter’s box. For useful comparisons, record the starting and finishing battery percentages, adapter and cable models, elapsed time and any devices running during the session. Our power-station test log provides a repeatable way to capture those conditions. We have not performed a charging test of this model.
Purchase availability
The eBay listing previously featured here has ended and is no longer available. We removed its purchase links and price on October 14, 2026. The charging guidance in this article applies to the C300 DC model A1726; it does not establish availability, included accessories or warranty terms for another listing.
Practical check: match USB and supported DC loads to the documented port limits, and account for the charging hardware you already own. For the port map, input profiles and safety instructions, consult Anker’s A1726 user guide.