Each USB-A QC 3.0 port supplies up to 18W, with up to 36W combined when both ports are used. These are maximum ratings for compatible devices, cables and a suitable boat supply.





Two USB-A ports for everyday charging aboard. The BAYWATT US2X3 marine charger socket brings two USB-A Quick Charge 3.0 ports to your boat’s 12V or 24V electrical system. Each port supplies up to 18W, with a 36W combined maximum, for compatible phones, tablets and USB accessories.
Fit it in the saloon, beside the chart table or at a sheltered helm to keep navigation tablets, crew phones and communication accessories charged directly from the boat battery.
Smart charging: the power your device can accept
A compatible Quick Charge device requests a supported charging voltage and draws the power it needs. An 18W port does not force 18W into every device. Devices without compatible fast charging can still charge at a supported standard USB level.
The rating is an available maximum. Charging power changes with battery level, temperature and device use; it does not guarantee a fixed charging time.
Two Devices Connected: How Much Power Is Available?
Both USB-A ports can be used together: up to 18W + 18W = 36W. This model provides USB-A charging; choose a USB-C model for compatible USB-PD laptop charging.
The moulded nylon body, protective cap and overload protection suit a panel-mounted charging point aboard. The technical sheet lists ECE R10 electromagnetic compatibility.
The socket has an IP65 rating and a protective cap. For exterior installation, choose a sheltered location, close the cap when not in use and protect the rear connections. Keep open ports and plugs dry while charging: IP65 protection with a cable connected is not established.
No integrated on/off switch. To disconnect the charger between trips, use a suitable separate switch on the electrical panel.
Compatible BAYWATT flat, round or POD supports adapt the installation to your console. A multi-position panel can combine USB charging with another compatible socket, voltmeter or switch.
| Reference | US2X3 |
|---|---|
| Ports and protocols | 2 × USB-A QC 3.0 |
| Nominal boat system | 12V / 24V DC |
| Operating input voltage | 8–32V DC |
| Maximum USB-A output | 18W per port |
| Maximum USB-C output | — |
| Both ports in use | 18W + 18W ; 36W |
| USB-A output voltage | 3.6–12V |
| USB-C output voltage | — |
| Quiescent current | 20mA |
| Protection rating | IP65; close the cap when not in use |
| Electrical protection | Overload protection |
| Electromagnetic compatibility | ECE R10 |
| Operating temperature | −40°C to +80°C |
| Panel cut-out | Ø29.2mm / 26.2mm across flats |
| Front diameter | Ø36.5mm |
| Front collar projection | 6mm |
| Overall length | 62.9mm |
| Supply terminals | 6.3mm spade terminals; nickel-plated copper |
| Specified service life | 5,000 operating cycles |
Dimensions correspond to the model’s technical drawing. Check the template before drilling. Actual charging power depends on the device, cable, boat supply and operating conditions.
Choose the connections and power suited to your devices. All four models are intended for 12V/24V systems and have an IP65 rating.
| Model | Ports | USB-A maximum | USB-C maximum on one port | Total limit | Suggested use |
|---|---|---|---|---|---|
| US2X3 | 2 × USB-A | 18W per port | — | 36W | Phones, tablets and USB-A accessories |
| US2XH | USB-A + USB-C | 18W | 60W | 65W | USB-C laptop or tablet plus USB-A accessories |
| US2XC | 2 × USB-C | — | 60W | 60W | Two USB-C devices; up to 60W total |
| US2XH-2 | USB-A + USB-C | 36W | 100W alone; 60W with USB-A | 100W USB-C alone; 96W with both ports | Laptop charging up to 100W on USB-C alone |
Maximum outputs require compatible devices, protocols and cables. Individual port ratings do not automatically add together; observe each model’s total limit.
Discover tips, tricks, and detailed instructions on using our product in our dedicated blog post. Learn about setup, operation, and optimization to get the most out of your purchase.


