200A Battery Isolator Relay — Smart Power Management for Dual‑Battery Systems

FUNCTION:
This isolator automatically links both batteries when the alternator is charging (engine running) and separates them when the engine is off, ensuring your secondary battery can power accessories without draining your starting battery. You always keep the ability to start your vehicle.

SPECIFICATIONS:

• Voltage: 12V DC
• Continuous Power Handling: 200A
• Surge Power Handling: 300A
• Mechanical Cycle Life: 100,000+ cycles
• Dimensions: 2‑3/8" W × 2‑3/8" D × 3‑3/4" H
• Current Draw: Less than 1 amp when active

ADVANTAGE:
Unlike conventional isolators, this relay does not cause voltage drop to the secondary battery — delivering full charging power and better overall system performance. Ideal for high‑demand car audio setups, off‑grid builds, and dual‑battery systems.

WIRING NOTES:

• Connect one small stud to ground
• Connect the other small stud to an ignition‑on source (fuse box)
• Large and small stud orientation does not matter

QUALITY & SUPPORT:

• 100% brand‑new, high‑quality construction
• 1‑year warranty
• Free returns and refunds

This isolator relay is the perfect solution when adding a secondary battery to your audio system — delivering clean power, reliable switching, and zero voltage loss where it counts.