{"product_id":"victron-bcd-402-diode-battery-combiner-2-banks-40a","title":"Victron BCD 402 2 batteries 40A (combiner diode) - BCD000402000","description":"\u003ch1 style=\"color: #f87c24;\"\u003eVictron BCD 402 Diode Battery Combiner – 2 Batteries, 40A\u003c\/h1\u003e\n\n\u003cp\u003eThe Victron BCD 402 is a diode-based battery combiner designed to charge two separate battery banks from a single charging source without allowing the banks to discharge into each other. It is suited to marine, vehicle and off-grid installations where battery isolation between banks is required alongside simultaneous charging.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCombines two battery banks with a single 40A continuous current rating per output.\u003c\/li\u003e\n  \u003cli\u003eDiode-based design ensures complete electrical isolation between battery banks, preventing cross-discharge.\u003c\/li\u003e\n  \u003cli\u003eAllows a single alternator or charger to charge both banks simultaneously.\u003c\/li\u003e\n  \u003cli\u003eCompact and lightweight at 0.49 kg, suitable for installation in confined spaces.\u003c\/li\u003e\n  \u003cli\u003eNo moving parts or mechanical contacts, reducing maintenance requirements over time.\u003c\/li\u003e\n  \u003cli\u003eCompatible with standard 12V and 24V battery systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe BCD 402 uses Schottky diodes to split a single charging source across two battery banks. Current flows from the charger or alternator to both banks, but the diodes block any reverse flow between the banks themselves. This means a depleted starter battery cannot draw down a service or leisure battery, and vice versa.\u003c\/p\u003e\n\n\u003cp\u003eOne practical consideration with diode combiners is the voltage drop across the diodes, typically around 0.5V to 0.7V. This means the charging voltage reaching the batteries will be slightly lower than the source output. In systems using a Victron charger or a smart alternator regulator, this can be compensated by adjusting the charge voltage setpoint accordingly. Installers should account for this when commissioning the system.\u003c\/p\u003e\n\n\u003cp\u003eThe BCD 402 handles up to 40A, making it appropriate for moderate charging loads from a vehicle alternator or a shore power charger in a two-bank configuration. It is not intended for high-current applications such as large inverter charging banks.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSKU: BCD000402000\u003c\/li\u003e\n  \u003cli\u003eGTIN: 8719076020967\u003c\/li\u003e\n  \u003cli\u003eConfiguration: 1 input, 2 battery outputs\u003c\/li\u003e\n  \u003cli\u003eContinuous current rating: 40A\u003c\/li\u003e\n  \u003cli\u003eWeight: 0.49 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMarine installations requiring separate starter and service battery banks charged from a single alternator.\u003c\/li\u003e\n  \u003cli\u003eCampervans and motorhomes with a split-charge system between engine and leisure batteries.\u003c\/li\u003e\n  \u003cli\u003eOff-grid cabins or vehicles where two battery banks are charged from one solar charge controller or charger output.\u003c\/li\u003e\n  \u003cli\u003eLight commercial vehicles with auxiliary battery banks for refrigeration or equipment loads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eWhat Is Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Victron BCD 402 diode 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 experienced marine\/vehicle electrical installer. Ensure the wiring to and from the combiner is rated for at least 40A continuous and is appropriately fused on the input side. Account for the diode voltage drop when setting charge voltage on the source device. The unit should be mounted in a dry, ventilated location away from direct heat sources.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":60227790405966,"sku":"BCD000402000","price":28.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0796\/3698\/8238\/files\/VoltaconSolar_-_BCD000402000_-_BCD_402_2_batteries_40A_combiner_diode.webp?v=1785164852","url":"https:\/\/voltaconsolar.com\/products\/victron-bcd-402-diode-battery-combiner-2-banks-40a","provider":"VoltaconSolar","version":"1.0","type":"link"}