SRL200 - Microprocessor Controlled 200a Smart Battery Isolator and High Current Starter Relay, Dual Sensing Smart Relay, with Ring Terminals

The SRL200 is a microprocessor-controlled 200-amp smart battery isolator and high-current starter relay designed for dual-battery vehicle setups. It automatically manages charging between batteries without the voltage drop associated with conventional diode-based isolators. Built for car audio systems and demanding vehicle electronics, it protects the main starting battery from discharge when accessories run with the engine off.

• 200A continuous / 300A surge — handles high-current loads without thermal shutdown under normal operating conditions.
• Voltage-sensing activation — connects the secondary battery once the main battery reaches 13.2V, ensuring the alternator is charging before linking banks.
• No voltage drop to secondary battery — microprocessor-controlled relay design outperforms traditional diode isolators that reduce charge voltage.
• Main battery protection — isolates the secondary bank when the engine is off, preventing accessory loads from draining the starting battery.
• Ring terminal connections — heavy-duty terminations suited for high-current wiring runs.
• 12V compatible — designed for standard automotive and marine 12-volt electrical systems.