Trailer Battery Monitor System

BMPRO’s TrailCheck is an additional remote trailer battery monitor system.


  • Bluetooth connectivity
  • Meets NSW regulations
  • LED status indicators for full-system safety check


Monitor your trailer with TrailCheck

TrailCheck is an additional remote trailer battery monitor system in the tow vehicle. Use it with TrailSafe break-away safety system, available from our store. As a wireless solution, TrailCheck communicates with TrailSafe via Bluetooth.

NSW has the extra-legal requirement to have a remote battery monitor onboard. The driver should be able to see or hear it, and it also should indicate that the breakaway system has a charged battery. Is your caravan registered in NSW? – Don’t go camping without an onboard monitor TrailCheck!

The TrailCheck will indicate system status with blue, green, orange or red LED indicators. For example, the green light indicates the battery is charged enough for over 15 minutes of operation – and that’s what you need in case of emergency.
Mount TrailCheck with the provided velcro strips so that it is visible to the driver, for example, under the dash, and plug it into a 15A (or lower) fused vehicle 12VDC Outlet or Cigarette lighter. Then pair it with the TrailSafe and test it. You are now safe to tow your caravan!



Bluetooth Low Energy (BLE 5.0)

Operational Voltage

8V to 16V

Operational Temperature

0°C to 50°C


The pairing button is located next to the cable, at the rear of the unit. How to pair TrailCheck with TrailSafe

The TrailCheck must be installed in a location where it is visible to the driver.

As the TrailCheck operates via Bluetooth,certain locations may provide a more reliable connection than others. If a suitable location can’t be located, a wired remote is required.

The recommended location is on the side of the transmission tunnel or under the dash.

No, you do not. The TrailCheck will remember the pairing to the TrailSafe even if it has been disconnected from power.