Victron Cyrix-ct 120A Battery Combiner Kit

The Victron Cyrix-ct 120A Battery Combiner Kit is a comprehensive, all-in-one solution engineered for effortless integration of a secondary or tertiary battery system into your vehicle, RV, or marine craft. By leveraging your engine's existing charging infrastructure, this plug-and-play kit ensures your house battery bank is automatically topped up while driving. When the engine is switched off, the system intelligently isolates the batteries, guaranteeing that your primary starter battery remains fully charged and ready for action.

At the heart of this kit lies the microprocessor-driven Cyrix-ct 120A smart relay, which completely outperforms traditional diode-based isolators. Because it eliminates internal voltage drops, it ensures that your batteries receive the precise charging voltage dictated by your alternator, leading to faster and more efficient charge cycles. With all necessary cables and hardware included, this kit is designed for a streamlined, professional-grade installation.

The kit bundles the Cyrix-ct 120A relay itself with the cables, ring terminals, and mounting hardware needed for a complete installation, so there is no need to source connectors separately or improvise a wiring solution. This is particularly useful for a first dual-battery install, where matching the right lug sizes and cable gauge to the relay's terminals can otherwise be a trial-and-error process.

Like the standalone relay, the kit's Cyrix-ct uses trend-based voltage sensing rather than a fixed timer, so it only closes the connection between banks when the alternator or another charge source is genuinely active, and opens again once the engine stops - avoiding both nuisance switching and the risk of a flat starter battery from house loads being left connected overnight.

Features

Complete "Ready-to-Install" Kit

Eliminates the guesswork by providing all essential components, including high-quality power cables, terminals, and mounting hardware for a quick, efficient setup.

Zero Voltage Drop Charging

The solid-state relay architecture provides a direct electrical path, ensuring that 100% of the alternator's output reaches your auxiliary batteries without the energy losses typical of diodes.

Intelligent Battery Management

Monitors voltage trends on both banks to automatically combine batteries during charging and isolate them during idle states, preventing the risk of a dead starter battery.

Emergency Start Override

Features a "Start Assist" terminal that allows for a temporary parallel connection (30 seconds) via a dash switch, enabling you to jump-start the engine using your auxiliary bank.

Versatile Power Compatibility

The system automatically detects 12V or 24V configurations, making it compatible with a wide range of standard vehicle and marine electrical systems.

Specifications

Datasheets and Manuals