DUAL BATTERY SWITCH 300 AMPS 3 POST

Dual Battery Switch 300 Amps 3-Post — Motorsport Battery Isolation and Selector Switch

The Dual Battery Switch 300 Amps 3-Post — SKU: 16-126 is a high-current motorsport battery selector and isolation switch rated at 300 amps, designed for dual-battery motorsport electrical systems. The 3-post configuration allows the driver or crew to select between Battery 1, Battery 2, Both batteries simultaneously, or Off — providing complete battery management control, redundant starting capability, and full electrical isolation in a single compact switch unit. An essential safety and electrical management component for professional race cars and high-performance vehicles across Norway, Sweden, and Denmark.

Why a Dual Battery Switch in Motorsport?

Dual battery switch systems are specified in professional motorsport for several critical reasons. First, battery isolation: regulations across multiple motorsport disciplines (including FIA-sanctioned events in Scandinavia) require a main battery isolation switch accessible to marshals from outside the car. Second, dual battery redundancy: running two batteries with a selector switch provides a backup starting source if the primary battery is drained by an electrical fault during a race or endurance event. Third, electrical separation: isolating one battery for specific circuits reduces interference and voltage drop on sensitive ECU and data acquisition systems.

3-Post Configuration — Battery 1, Battery 2, and Common

The 3-post layout accommodates two battery inputs (Battery 1 and Battery 2) and a single common output — allowing the switch to route either individual battery or both batteries in parallel to the vehicle’s electrical system. The combined 300-amp rating ensures the switch handles the peak combined current draw of a full race car electrical load including starter motor transients, fan motors, fuel pumps, and ECU systems simultaneously.

Technical Specifications

• Type: Dual battery selector and isolation switch
• Current rating: 300 Amps
• Posts: 3 (Battery 1, Battery 2, Common/Output)
• Positions: Battery 1 / Battery 2 / Both / Off
• Suitable for 12V and 24V motorsport electrical systems
• Meets motorsport electrical isolation requirements for race and rally applications

Applications

• Dual-battery race car electrical isolation and battery management
• FIA and motorsport regulation-compliant battery isolation systems
• Endurance racing redundant battery switching
• High-performance road and track car dual-battery electrical builds across Norway, Sweden, and Denmark