The ThunderBox simplifies and secures the connection of electronic accessories (additional lights, heated grips, GPS, phone charger, extra gauges, and other powered devices) to your BMW 1300, 1250, 1200, 1000, 900 / GS, XR, RS, RT, R, RR, XR.... It acts as an automatic and easy-to-use power distributor between the battery and the accessories. Thanks to the supplied quick-connect terminals, installation is simple and fast, requiring no tools or special knowledge.

The ThunderBox not only extends battery life but also protects the bike’s electrical system from overloads and short circuits. Solve your power issues in no time!

Simple and quick to use,
the control box connects directly to the battery terminals. Then choose between fully automatic or manual operation (with ignition key). Connect auxiliary equipment quickly, easily, and safely using the supplied terminals, without tools. Just plug in the cables, and you’re ready to go!

 Multiple operating modes:
The ThunderBox can operate in three different modes. Depending on the connection of the WHITE control wire, the following modes are available: Automatic mode: When the engine starts and runs steadily, the ThunderBox activates the power outputs.
When the engine stops, the outputs are deactivated after a few seconds.
Ignition-controlled mode: The ThunderBox activates/deactivates the outputs (with a delay of a few seconds) based on the ignition key position.
Sleep mode: The ThunderBox does not power the outputs, even when a battery charger is connected. This mode is useful during winter storage, as a maintenance charger will not activate it.

 Exceptional technology:
The TB continuously monitors battery voltage, engine status (on/off), and outputs, then automatically activates/deactivates loads. The TB isolates/cuts power to accessories until the engine starts and runs properly, ensuring 100% battery power for starting. This fully automated process guarantees trouble-free starts and extends battery life.

 Small but robust.
We use only the best components and technologies to create products capable of withstanding the harshest environments. The TB has no moving parts, relays, or fuses. Inside its durable plastic housing, the circuits are encapsulated in epoxy resin, making it completely oil- and water-tight, as well as resistant to shocks and vibrations.

 Wide compatibility
Compatible with ALL vehicles using a 12V battery system (all battery types and capacities supported), including all motorcycles, cars, ATVs/UTVs, kit cars, and even lawn tractor trucks.

 USB charger:
With optional USB chargers, the power to your mobile devices is automatically switched on and off and protected. You can connect multiple USB chargers to a single TB unit.

TB-USB1:
USB charger with weather-resistant USB-A port. Input: 11-24 V, Output: 5 V DC, 2 A

TB-USB2:
USB charger with USB-C port (for enhanced port protection, you can use a short USB-C extension).
Input: 11-24 V, Output: 5/9/12 V DC, 3 A