SRL500 - Microprocessor Controlled 500a Smart Battery Isolator and High Current Starter Relay, Dual Sensing Smart Relay, with Ring Terminals

The SRL500 is a microprocessor-controlled smart battery isolator and high current starter relay rated for 500A continuous and 700A surge at 12V. Designed for dual-battery setups in vehicles with high-draw audio systems or auxiliary equipment, it keeps the main starting battery protected when accessories run with the engine off. Unlike conventional isolators, it uses smart relay logic to avoid voltage drop to the secondary battery.

• 500A Continuous / 700A Surge: Handles high-current demands without thermal throttling or voltage loss.
• Microprocessor-Controlled Activation: Connects both batteries once the main battery reaches 13.2V, preventing secondary drain from pulling down the primary.
• Dual Sensing Smart Relay: Monitors both battery banks independently for accurate isolation and connection decisions.
• No Voltage Drop: Smart relay design eliminates the voltage penalty common with diode-based isolators.
• Engine-Off Protection: Prevents auxiliary loads from discharging the main starting battery during engine-off operation.
• Ring Terminal Connections: Includes ring terminals for secure, low-resistance high-current wiring.