BlitzWolf BW-S31: A 240 W GaN Station with Six Ports and Questions at High Load

The BlitzWolf BW-S31 is a desktop GaN charging station with four USB-C ports, two USB-A ports and a claimed total output of up to 240 W. Its two main USB-C ports support Power Delivery 3.1 and can each deliver up to 140 W when used individually.

The station can power a laptop, phone and tablet at the same desk. When choosing a charger, though, it’s important to distinguish between individual port maximums and the power available when several ports are in use. A user test with an electronic load also reported disconnections with some load combinations at around 200 W.

Two main USB-C ports with up to 140 W

USB-C1 and C2 each support up to 140 W individually via PD 3.1. PPS is also available at approximately 3.3–21 V and up to 5 A.

To use the full 140 W, you need a compatible device and a USB-C cable that supports 5 A and PD 3.1 EPR. A 5 A rating or the presence of an E-marker alone does not confirm that a cable supports 140 W.

In a two-port test, a user measured 140 W from C1 at 28 V and 5 A. This shows that the port can deliver that output in the tested configuration. It does not mean both main ports can deliver 140 W each simultaneously: the station’s claimed total output is lower than that.

Additional USB-C and USB-A ports

USB-C3 and C4 support approximately 65 W per port. They can power a compatible laptop or charge other devices, although the available output also depends on which other ports are in use.

USB-A1 and A2 support Quick Charge, with a stated maximum of up to 60 W when used individually. When both are used together, power is shared: the official table lists approximately 15 W per port for the A1 + A2 combination.

What the 240 W total means

The manufacturer claims a total output of up to 240 W. That does not mean every port can operate at its individual maximum when used simultaneously. With multiple devices connected, the available power depends on the particular port combination and how output is allocated.

In one user test with an electronic load, the station disconnected at approximately 200 W across several load combinations. The available description does not specify the configurations in detail, so the result cannot be generalized to every setup or every unit. It is nevertheless a reason not to assume that 240 W is a guaranteed stable output for any port combination.

Heat under high load

The same user reported measuring a surface temperature of around 90 °C after 60 minutes under a sustained load of approximately 200 W. The test took place in a hot room at about 34.5 °C. The description does not specify the configuration for this measurement or how it differed from the tests in which the station disconnected.

Leave clear space around the station for ventilation and do not cover it with papers or other objects. If the surface is hot, avoid touching it and let the device cool before handling it.

Display and key specifications

The front digital display shows power, making it useful for a rough check while charging. The available description does not specify how the display measures power or how accurate it is.

• Claimed total output: up to 240 W
• USB-C1 and C2: up to 140 W individually via PD 3.1
• PPS on the main USB-C ports: approximately 3.3–21 V / 5 A
• USB-C3 and C4: approximately 65 W per port
• USB-A1 and A2: Quick Charge, stated maximum of up to 60 W individually
• USB-A1 + A2: approximately 15 W + 15 W according to the official table
• Display: shows power

The design makes this more of a desktop charging station than a travel adapter. The available description does not give specific dimensions or weight.

Who is the BW-S31 for?

The BW-S31 is an option for a desk where a laptop and several other devices need charging at the same time. The main ports offer high output for a compatible laptop, while the additional USB-C and USB-A ports can connect phones, tablets or accessories.

If you need to draw more than 200 W continuously across several ports, however, the user test leaves questions about how the station behaves under that load. Before deciding, check the power allocation for the specific port combination you intend to use, and do not assume that the sum of the individual port maximums is available simultaneously.