DC-to-USB Charging for Vehicles, Marine & Off-Grid Power Systems
Industry Solutions
DC-to-USB Charging for Vehicles, Marine & Off-Grid Power Systems
9–28V DC Direct / Embedded Installation / USB-C PD Up to 140W / No Inverter Needed
Any environment that runs on DC power — fleet vehicles, commercial trucks, buses, marine vessels, RVs, solar installations, or industrial control cabinets — faces the same challenge: how to charge USB-C laptops, tablets, and mobile devices without an AC inverter. Traditional setups waste 20–40% of energy converting DC to AC and back to DC, add bulk, generate heat, and introduce another point of failure.
AOK's PWR Series are compact industrial DC-to-USB charging modules designed for embedded installation — mounted behind panels, inside dashboards, or in control enclosures, with the USB-C port exposed through a panel cutout. They convert 9–28V DC directly to USB-C PD fast charging at up to 140W per port, in a single efficient step. Screw-lock USB-C connectors prevent disconnection from vibration, and the metal housing withstands harsh operating conditions from -20°C to +70°C.
Why Eliminate the Inverter?
Traditional setup: Battery (12/24V DC) → Inverter (DC→AC 220V) → Wall charger (AC→DC) → Device. Two conversion steps, 20–40% energy loss as heat, bulky inverter box, and a standard wall charger that vibrates loose.
AOK PWR setup: Battery (12/24V DC) → PWR module (DC→DC) → Device. One step, over 90% efficiency, compact metal module behind the panel, screw-lock USB-C output. Less heat, less space, more reliable.
Designed for Embedded Installation
◆ Behind-panel mounting The PWR module mounts behind a dashboard, console panel, or enclosure wall using screw holes on the metal bracket. The USB-C port faces outward through a panel cutout — only the port is visible to the end user, keeping the installation clean and professional. | ⚡ Screw-lock USB-C output USB-IF standard screw-lock mechanism physically locks the cable to the charger. In high-vibration environments — trucks, boats, construction equipment — this prevents the cable from disconnecting during operation. Critical for devices that must stay charged on the move. | ⚐ DC jack or terminal block input Two input options: DC 5.5x2.5mm jack for quick connections, or 2-pin terminal block for permanent hardwired installations directly to the battery, fuse box, or DC bus. Accepts 9–28V DC, covering 12V cars, 24V trucks, and solar/marine systems. |
Where It Gets Installed
Fleet Vehicles & Commercial Trucks Fleet integrators install PWR modules behind the dashboard or center console. USB-C ports are exposed through panel cutouts for drivers to charge tablets, laptops, and handheld scanners. Terminal block wiring connects directly to the fuse box for a permanent, clean installation across entire fleets. | Emergency & Special-Purpose Vehicles Ambulances, fire trucks, patrol cars, and military vehicles need reliable high-power charging for rugged laptops and communication equipment. The 100W and 140W models are embedded into the vehicle's equipment rack or console, hardwired to the 12V/24V system. OEM vehicle manufacturers integrate them at the factory. | Buses, Coaches & Ride-Share Dual-port models (PWR-2C-6545 or PWR-2C-200) are installed into seatback panels or armrest consoles, providing USB-C PD charging for passengers. The screw-lock mechanism is especially valuable in public transport where cables face constant plugging and unplugging. |
Marine & Yachts Boats and yachts run on 12V or 24V DC battery banks. PWR modules mount inside the helm console or cabin panel, providing fast USB-C charging for navigation tablets, communication devices, and personal electronics — without running the generator for AC power. | RV, Caravan & Off-Grid Solar Recreational vehicles and solar installations output 12V/24V DC from battery banks. PWR modules convert this directly to USB-C PD for laptops and tablets — no inverter needed, preserving precious battery capacity for longer off-grid use. | Industrial Control Cabinets Factory 24V DC bus systems can power a PWR module mounted inside the control cabinet, providing a USB-C PD charging point for maintenance engineers' laptops — directly from the DC rail, without a separate AC outlet in the cabinet. |
Choose Your Model
Installation Note
The PWR Series is designed as an embedded charging module, not a consumer plug-and-play device. Professional installation is recommended. Typical integration involves mounting the unit behind a panel or inside an enclosure, with the USB-C port accessible through a cutout, and the DC input hardwired to the vehicle battery, fuse box, or DC power bus via the 2-pin terminal block.
For lower-power models (PWR-1A1C at 78W and PWR-1C-100W at 100W), a cigarette lighter adapter cable (12V cigarette plug to DC 5.5x2.5mm) can also be used for quick, non-permanent installations — provided the vehicle's cigarette lighter fuse is rated at 10A or higher.
All Models Share These Features
9–28V DC inputUSB PD 3.0 / 3.1 EPRQC 4+ / SCP / AFC / PPSScrew-lock USB-CMetal housingOver-current / over-voltage / ESD-20 to +70 degrees CCharging only (no data)
Related Products
PWR-1C-140W Single USB-C, 140W EPR View Product → | PWR-2C-200 Dual USB-C, 100W+100W View Product → | PWR-1C-100W Single USB-C, 100W PD View Product → | PWR-2C-6545 Dual USB-C, 65W+45W View Product → | PWR-1A1C USB-A + USB-C, 78W View Product → |
Need a custom voltage range, connector type, or private label for your fleet?
AOK provides OEM / ODM services for DC-to-USB charging modules — custom input voltage, output power, panel-mount configuration, housing, and CE documentation from MOQ 500 pcs.
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AOK Electronics Co., Ltd.
- Factory Add.:Bldg A, No.9 Changyi Rd, Wuguishan Town, Zhongshan, GuangDong, China 528400
- Tel:+86 760 8993 5569
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- E-mail:info@aok-top.com
