WirthCo 20090 Battery Doctor 75/100 Amp Dual Battery Isolator

The WirthCo 20090 Battery Doctor Battery Isolator is a state-of-the-art electronic dual battery controller designed for vehicles, RVs, boats, and equipment with auxiliary battery systems. Rated at 75 amps continuous with 100 amp peak capacity, this microprocessor-controlled isolator allows you to charge two 12-volt batteries from a single alternator while keeping the starting battery isolated from the auxiliary battery.

Key Features:

• Priority Charging: Ensures the starting battery is fully charged before connecting the auxiliary battery in parallel
• Manual Override Function: Single push-button allows batteries to be paralleled for jump-starting if the main battery is discharged
• Water Resistant Design: IP62-rated protection makes it suitable for marine applications
• Over-Current and Surge Protection: Protects the isolator and vehicle's electronic systems from damage
• Compact Electronic Design: Smaller and lighter than traditional diode-based isolators using advanced electronic switching control technology
• Easy Installation: No modifications to existing vehicle wiring required; fits all 12V negative ground systems
• Includes Mounting Bracket: Complete with hardware for secure installation

The isolator features LED indicators for power and charging status, automatically connecting the auxiliary battery once the starting battery reaches 13.4V and disconnecting when voltage drops below 12.8V. Designed for lead-acid batteries only, this fully automatic system requires batteries of the same nominal voltage. Compact dimensions of approximately 4" x 4" x 2" and lightweight design make installation simple in tight spaces.