{"product_id":"victron-cyrix-ct-intelligent-battery-combiner-12-2-4849","title":"Victron Energy - 12\/24V - Cyrix-ct Intelligent Battery Combiner 12\/24V-230A VSR","description":"\u003ch2\u003eVictron Cyrix-ct 12\/24V-230A: Intelligent Battery Combiner for Dual-Battery Systems\u003c\/h2\u003e\n\u003ch3\u003eAdvanced Voltage Sensing Relay for Reliable Parallel Charging\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eVictron Cyrix-ct 12\/24V-230A\u003c\/strong\u003e is a microprocessor-controlled \u003cstrong\u003evoltage sensitive relay (VSR)\u003c\/strong\u003e designed to intelligently manage dual-battery systems in vehicles, boats, and off-grid installations. Unlike conventional split charge relays that rely on simple voltage thresholds and fixed time delays, the Cyrix-ct uses \u003cstrong\u003eintelligent trend detection\u003c\/strong\u003e to prevent unwanted switching caused by momentary voltage dips or spikes. This ensures your auxiliary battery bank charges reliably without premature disconnection, even when powering high-demand loads.\u003c\/p\u003e\n\u003cp\u003eEngineered for 12V and 24V auto-ranging systems, this \u003cstrong\u003e230A continuous battery combiner\u003c\/strong\u003e is an ideal solution for \u003cstrong\u003ecaravan battery charging\u003c\/strong\u003e, \u003cstrong\u003emarine dual-battery setups\u003c\/strong\u003e, \u003cstrong\u003e4x4 auxiliary power\u003c\/strong\u003e, and \u003cstrong\u003ecommercial vehicle electrical systems\u003c\/strong\u003e. Its bidirectional voltage sensing and dual power supply allow it to engage from either battery side, making it a versatile component in any \u003cstrong\u003eDC charging architecture\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eIntelligent Trend Detection: Smarter Than a Standard VSR\u003c\/h3\u003e\n\u003cp\u003eTraditional battery combiners often disconnect under short, high-amperage loads or fail to connect a deeply discharged battery bank because the voltage immediately drops below the disengage threshold. The Cyrix-ct overcomes these limitations by analysing the \u003cstrong\u003evoltage trend over time\u003c\/strong\u003e. It only reverses a connection decision if the trend has genuinely reversed, with a time delay proportional to the voltage deviation. This prevents nuisance switching and ensures stable, continuous charging.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e230A continuous current rating\u003c\/strong\u003e with 500A cranking capacity for 5 seconds, supporting large battery banks and high inrush loads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12\/24V auto-ranging\u003c\/strong\u003e automatically detects system voltage, simplifying installation across mixed fleets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBidirectional voltage sensing\u003c\/strong\u003e and dual power supply allow engagement from either battery, ideal for alternator or shore charger input\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStart Assist function\u003c\/strong\u003e enables manual parallel connection for 30 seconds via push button or switch, providing emergency cranking power from the auxiliary battery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver-temperature protection\u003c\/strong\u003e disengages the relay if contact temperature exceeds safe limits, automatically reconnecting after cooling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED status indicator\u003c\/strong\u003e provides clear visual feedback: engaged, disengaged, connecting, disconnecting, and alarm states\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVirtually zero voltage drop\u003c\/strong\u003e across the contacts, eliminating the need to increase alternator or charger output voltage as required with diode isolators\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrioritises starter battery\u003c\/strong\u003e by only engaging when the starter battery reaches the connect voltage, ensuring reliable engine starting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e16 mm (M8) long bolts\u003c\/strong\u003e allow secure connection of multiple heavy-duty cable lugs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP54 protection\u003c\/strong\u003e rated for dust and water spray, suitable for engine bays and exposed installations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow current consumption\u003c\/strong\u003e: less than 4 mA when open, 320 mA (12V) or 180 mA (24V) when closed\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBuilt for Demanding Environments\u003c\/h3\u003e\n\u003cp\u003eThe Cyrix-ct operates reliably in temperatures from -40 to +60 °C, making it suitable for Australian outback conditions, marine engine rooms, and cold-climate expeditions. Its compact dimensions (65 x 100 x 50 mm) and lightweight design (0.27 kg) allow flexible mounting in tight spaces. The included 1-metre control cable simplifies integration with existing wiring, while the robust M8 stud terminals accommodate heavy-gauge cables for minimal resistance.\u003c\/p\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaravans and motorhomes\u003c\/strong\u003e: automatically charge house batteries from the alternator while driving\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4x4 and off-road vehicles\u003c\/strong\u003e: maintain auxiliary power for winches, fridges, and lighting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine vessels\u003c\/strong\u003e: combine starter and service battery banks for efficient charging underway or at dock\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommercial trucks and buses\u003c\/strong\u003e: manage multiple battery banks for lift gates, communications, and auxiliary equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOff-grid solar systems\u003c\/strong\u003e: integrate with battery chargers to parallel charge multiple battery strings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Choose the Cyrix-ct Over Diode Isolators?\u003c\/h3\u003e\n\u003cp\u003eDiode isolators introduce a voltage drop of 0.6-0.7V, requiring higher alternator output and reducing charging efficiency. The Cyrix-ct uses a mechanical relay with negligible voltage loss, ensuring your batteries receive the full charging voltage. This leads to faster, more complete charging and longer battery life, especially critical for AGM and lithium batteries that require precise voltage regulation.\u003c\/p\u003e\n\u003ch3\u003eUpgrade Your Dual-Battery System Today\u003c\/h3\u003e\n\u003cp\u003eExperience reliable, intelligent battery management with the \u003cstrong\u003eVictron Cyrix-ct 12\/24V-230A\u003c\/strong\u003e. Whether you're building a new off-grid setup or upgrading an existing split charge system, this VSR delivers the precision and durability needed for demanding mobile and marine applications. Add it to your system now and ensure your auxiliary batteries are always ready when you need them.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable class=\"product-specifications\" style=\"width:100%; border-collapse:collapse; border:1px solid #d9d9d9; table-layout:auto;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eAuto Ranging\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e12\/24 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eLED Status Indication\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eContinuous Current\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e230 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eCranking Rating (5 Seconds)\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e500 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eConnect Voltage With Intelligent Trend Detection\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eFrom 13 V to 13.8 V and 26 to 27.6 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eDisconnect Voltage With Intelligent Trend Detection\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eFrom 11 V to 12.8 V and 22 to 25.7 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eCurrent Consumption When Open\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e\u0026lt;4 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eCurrent Consumption When Closed\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e12 V: 320 mA; 24 V: 180 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eOperating Temperature Range\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e-40 to +60 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eStart Assist\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eYes (Cyrix remains engaged during 30 seconds)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eControl Cable Included (Length 1 m)\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eProtection Category\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003eIP54\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eLong Bolts\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e16 mm (M8)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eWeight\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e0.27 kg (0.6 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #d9d9d9; padding:8px; text-align:left; width:35%; vertical-align:top;\"\u003eDimensions H x W x D\u003c\/th\u003e\n\u003ctd style=\"border:1px solid #d9d9d9; padding:8px; vertical-align:top;\"\u003e65 x 100 x 50 mm (2.6 x 4.0 x 2.0 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"Victron","offers":[{"title":"Default Title","offer_id":52364354879771,"sku":"Vic-CYR010230010","price":169.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0854\/3354\/9083\/files\/Vic-CYR010230010-01.jpg?v=1781658044","url":"https:\/\/www.nbcampingequipment.com.au\/products\/victron-cyrix-ct-intelligent-battery-combiner-12-2-4849","provider":"NB Camping Equipment","version":"1.0","type":"link"}