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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.

36 Watts
Max Output
2 x QC 3.0
USB-A Ports
Voltmeter
Built In
8–32V
Input Voltage
2 Years
Warranty

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.

TVDSU USB socket
1 x USB-A 5V 1A (5 W)
1 x USB-A 5V 2.1A (10.5 W)
Total 15.5 W
Input 12–24V DC
Best for Everyday phone and GPS charging in older vehicles, caravans and boats
TVDSU2 USB socket
TVDSU2 THIS SOCKET
2 x USB-A QC 3.0 (18 W each)
Total 36 W
Input 8–32V DC
Best for Fast-charging two phones while keeping an eye on battery voltage
TVDSU3 USB socket
1 x USB-C PD (45 W)
1 x USB-A QC 3.0 (18 W)
Total 36 W on 12V, 45 W on 24V
Input 12–24V DC
Best for Charging a USB-A and a USB-C phone, both fast
TVDSU4 USB socket
2 x USB-C PD (45 W)
1 x USB-A QC 3.0 (36 W)
Input 12–24V DC (32V max)
Best for Families: three devices at once, two on fast USB-C
TVDSU5 USB socket
1 x USB-C PD (65 W)
1 x USB-A QC 3.0 (18 W)
Total 83 W
Input 12–24V DC
Best for Charging a laptop or tablet on the road (65 W USB-C)
TVDSU6 USB socket
1 x USB-C PD (100 W)
1 x USB-A QC 3.0 (36 W)
Total 136 W
Input 12V / 24V DC (32V max)
Best for Big laptops, and wet spots like boats and exposed panels (100 W, IP65)
Dual QC 3.0 USB Socket with Digital Voltmeter, 36W, 8-32V DC

Fast charging on both ports

PortOutputMax 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

Dual USB socket with built-in voltmeter display

Tested for vehicle life

Side view of the dual USB voltmeter socket and its spade terminal

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.

TVDSU2 size diagram: 37 mm face, 43 mm body length, 30 mm panel hole

2
Year
Warranty
Why buy from Perception Lighting12 Volt DirectSPC Enterprises
Australian business since 2007
Sydney store, shipping Australia-wide
Real people, here in Australia
Not an overseas call centre
2-year warranty
Plus 30-day change-of-mind returns

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

Specifications

Ports2 x USB-A Quick Charge 3.0
Output per Port5V / 3.1A
9V / 2A
12V / 1.5A
Max Output36 W
Input Voltage8–32V DC
DisplayDigital Voltmeter
Mounting Hole29.2 mm Minimum
Overall Length53 mm
Bezel Diameter37 mm
Height with Cap50 mm
Body Diameter29 mm (Threaded)
Retaining Nut37 mm Diameter, 5 mm Thick
Terminals6.3 mm Spade, 10 mm Apart
USB Contact ResistanceUnder 100 mΩ
Cover Opening ForceUnder 3,000 gf (about 29 N)
Plug Insertion ForceUnder 1,000 gf (about 9.8 N)
Plug Pull-Out ForceUnder 1,500 gf (about 14.7 N)
Salt Spray Test8 Hours Minimum, 5% NaCl
Impact Resistance8 kgf Minimum
Temperature Rating-25°C to +85°C
Warranty2 Years

What's Included

  • 1 x dual QC 3.0 USB socket with voltmeter and hinged cap
  • 1 x threaded retaining nut

Product Details

SKU TVDSU2
Barcode # 769807744103
Brand 12 Volt Direct

12 Volt Direct is a 12 V power specialist for the automotive, 4WD, caravan and off-grid industry. When 12V matters, trust the professionals. 12 Volt Direct was built around a simple idea: 12 V systems should be done properly. Its range is designed for the way Australians power their vehicles, carava...

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