{"product_id":"victron-cyrix-i-24-48v-400a-battery-combiner","title":"Victron Cyrix-i 24\/48V-400A intelligent battery combiner - CYR020400000","description":"\u003ch1 style=\"color: #f87c24;\"\u003eVictron Cyrix-i 24\/48V 400A Intelligent Battery Combiner\u003c\/h1\u003e\n\n\u003cp\u003eThe Victron Cyrix-i 24\/48V-400A is a microprocessor-controlled battery combiner designed for 24V and 48V systems requiring high-current parallel charging between two battery banks. It replaces conventional diode-based isolators and voltage-sensing relays, eliminating the voltage drop and heat losses associated with those approaches. Suitable for marine, vehicle, off-grid and industrial applications where reliable split-charge management is required.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eRated at 400A continuous current, suitable for high-demand 24V and 48V battery systems.\u003c\/li\u003e\n  \u003cli\u003eMicroprocessor-controlled logic monitors battery voltages and connects banks only when charging conditions are met, preventing unwanted discharge between banks.\u003c\/li\u003e\n  \u003cli\u003eOperates across both 24V and 48V nominal system voltages, making it compatible with a wide range of battery configurations.\u003c\/li\u003e\n  \u003cli\u003eNo voltage drop across the combiner when closed, unlike diode-based isolators which introduce a 0.6V to 0.7V loss.\u003c\/li\u003e\n  \u003cli\u003eAutomatic disconnect when voltage drops below threshold, protecting the starter or primary battery bank from being drained by auxiliary loads.\u003c\/li\u003e\n  \u003cli\u003eCompact and robust construction with a weight of 0.9 kg, suitable for installation in confined spaces.\u003c\/li\u003e\n  \u003cli\u003eCompatible with lead-acid battery chemistries including AGM, gel and flooded types.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe Cyrix-i works by continuously monitoring the voltage of both battery banks. When the voltage on either bank rises above a preset threshold (indicating that a charger or alternator is active), the Cyrix-i closes its internal relay and connects the two banks in parallel. This allows both banks to charge simultaneously from a single source. When the voltage drops back below the disconnect threshold, the relay opens and the banks are isolated again.\u003c\/p\u003e\n\n\u003cp\u003eAt 400A, this unit is rated for systems with high charging currents, such as those fed by large alternators or multi-stage battery chargers. The 24\/48V dual-voltage compatibility means the same unit can be used across different system architectures without needing separate part numbers for each voltage. The absence of a voltage drop across the device (when compared to diode isolators) means charger voltage settings do not need to be compensated, and battery charging accuracy is maintained.\u003c\/p\u003e\n\n\u003cp\u003eThe Cyrix-i range is designed to work alongside Victron chargers, inverter\/chargers and BatteryProtect devices, though it functions independently of any specific Victron ecosystem and can be integrated into third-party systems.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"border: 2px solid #f87c24; border-collapse: collapse; width: 100%;\"\u003e\n  \u003ctr style=\"background-color: #f87c24; color: #ffffff;\"\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e\u003cstrong\u003eValue\u003c\/strong\u003e\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eSKU\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eCYR020400000\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eSystem Voltage\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e24V \/ 48V\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eContinuous Current Rating\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e400A\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eWeight\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e0.9 kg\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003eGTIN\u003c\/td\u003e\n    \u003ctd style=\"border: 1px solid #f87c24; padding: 8px;\"\u003e8719076022305\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSplit-charge systems on commercial vehicles, coaches and HGVs with 24V electrical systems.\u003c\/li\u003e\n  \u003cli\u003eMarine vessels with separate starter and house battery banks at 24V or 48V.\u003c\/li\u003e\n  \u003cli\u003eOff-grid installations where a generator or solar charger feeds multiple battery banks.\u003c\/li\u003e\n  \u003cli\u003eIndustrial and telecoms backup power systems requiring isolated battery banks with automatic parallel charging.\u003c\/li\u003e\n  \u003cli\u003e48V electric vehicle auxiliary systems requiring battery bank management.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eWhat Is Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1x Victron Cyrix-i 24\/48V-400A intelligent battery combiner\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eInstallation Notes\u003c\/h3\u003e\n\u003cp\u003eInstallation should be carried out by a qualified electrician or marine\/vehicle electrical specialist familiar with high-current DC systems. At 400A, correct cable sizing, fusing and terminal torque are critical for safe operation. Ensure the unit is mounted in a ventilated location away from flammable materials. For off-grid solar installations, installation by a qualified professional is strongly recommended. Always follow Victron's wiring guidelines and local electrical regulations.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":59863679402318,"sku":"CYR020400000","price":210.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/3698\/8238\/files\/VoltaconSolar_-_CYR020400000_-_Cyrix-i_24-48V-400A_intelligent_battery_combiner.webp?v=1781183326","url":"https:\/\/voltaconsolar.com\/products\/victron-cyrix-i-24-48v-400a-battery-combiner","provider":"VoltaconSolar","version":"1.0","type":"link"}