Trailers equipped with which system utilize a 12 V battery?

Trailers equipped with electro-hydraulic brakes utilize a 12 V battery because this system combines hydraulic actuation with electric control. The 12 V battery powers the electric component that activates the hydraulic system, allowing for more responsive braking and improved performance compared to traditional hydraulic or air brake systems. The electric component enables the driver to have better control over the braking force applied, which can enhance safety and maneuverability, especially in varied driving conditions.

Unlike the other systems mentioned, hydraulic brakes rely purely on hydraulic fluid pressure without electrical input, air brakes operate with air pressure from a compressor, and disc brake systems can be either hydraulic or air-operated. Therefore, the unique integration of electric control within the electro-hydraulic system is what distinctly necessitates the use of a 12 V battery.