Dual QC 3.0 USB Socket with Digital Voltmeter, 36W, 8-32V DC
In Stock - Ready for immediate dispatch or pickup
Pickup Available from Punchbowl, NSW
DETAILS
Overview
Dual QC 3.0 USB socket with voltmeter
Two Quick Charge 3.0 USB-A ports and a built-in digital voltmeter in one socket. Fast charge two phones at once, and keep an eye on your battery voltage every time you lift the cap. The wide 8–32V input suits 12V and 24V vehicles, trucks, boats, caravans and battery boxes, and the factory-tested body is built for dust, damp and corrugations.
Compare our USB sockets
Which one is right for you? All six fit the same 29.2 mm hole, so you can upgrade an older socket without re-cutting the panel.

1 x USB-A 5V 2.1A (10.5 W)


1 x USB-A QC 3.0 (18 W)

1 x USB-A QC 3.0 (36 W)

1 x USB-A QC 3.0 (18 W)

1 x USB-A QC 3.0 (36 W)

Fast charging on both ports
| Port | Output | Max Power |
|---|---|---|
| USB-A QC 3.0 (x2) | 5V / 3.1A 9V / 2A 12V / 1.5A | 18 W per port |
| Both together | 36 W max |
Quick Charge 3.0 lifts the voltage to 9V or 12V for phones that support it, so they charge much faster than on a standard 5V port. Devices that don’t support QC simply charge at normal 5V speed, so it’s safe for every USB device.
Know your battery
The digital voltmeter shows the live voltage of the circuit feeding the socket. Wired to your auxiliary battery, it tells you at a glance how much charge is left, whether the solar or DC-DC charger is doing its job, and when it’s time to start the engine before the fridge cuts out.
- ✓12.7V or more: a lead-acid or AGM battery at rest is close to full
- ✓About 12.2V: a lead-acid or AGM battery is roughly half charged; recharge soon
- ✓Lithium (LiFePO4) batteries sit flat at about 13.0–13.4V for most of their capacity, so a falling reading means they are near empty

Tested for vehicle life

Every socket in our range is built to the same factory test standard, so it holds up to dust, damp and corrugations, not just a clean office desk:
- ✓Low contact resistance (under 100 mΩ): less power lost as heat in the port, so more reaches your device
- ✓Firm plug grip: plugs push in with under 1,000 gf and need up to 1,500 gf to pull out, so a cable stays put on rough tracks
- ✓Salt spray tested: 8 hours minimum in 5% salt fog, for boats, beach trips and coastal caravans
- ✓Impact rated to 8 kgf: takes a knock from a boot, bag or esky lid
- ✓Hinged weather cap: keeps dust and water out of the ports when not in use
- ✓Rated -25°C to +85°C: handles a hot dashboard in summer and frosty mornings in the high country
Fitting
- ✓Hole size: cut a round hole of at least 29.2 mm (a 30 mm hole saw works) in any panel, dash, battery box or canopy wall
- ✓Space behind the panel: allow about 53 mm for the body and terminals, plus room for the wires
- ✓Mounting: push the socket through from the front and tighten the threaded retaining nut from behind
- ✓Wiring: push-on spade terminals marked + and −. Run the positive through an inline fuse close to the battery
- ✓Suggested fuse: 5A on the positive feed
- ✓Terminals: 6.3 mm spade terminals, 10 mm apart
USB sockets and voltmeters draw a small current even with nothing plugged in. If the vehicle will sit for weeks, wire the socket through a switch or turn off the battery isolator.

Warranty
Need a hand choosing?
Not sure which socket suits your setup? contact our team and we’ll help you pick the right one. Every socket ships from our Sydney store with a 2-year warranty.
Features
- ✓2 x Quick Charge 3.0 USB-A ports, 18 W each (36 W total)
- ✓Output per port: 5V/3.1A, 9V/2A, 12V/1.5A
- ✓Built-in digital voltmeter to check battery voltage
- ✓Wide 8–32V DC input for 12V and 24V systems
- ✓Hinged weather cap
- ✓Fits a standard 29.2 mm hole, flush mount with threaded nut
- ✓Salt spray tested (8 hours, 5% NaCl) and impact rated to 8 kgf
- ✓Rated -25°C to +85°C
- ✓2-year warranty
Product Details
| SKU | TVDSU2 |
| Barcode # | 769807744103 |
| Brand | 12 Volt Direct |
| Type | Volt Meter |
| SKU | TVDSU2 |