{"product_id":"victron-bcd-402-battery-combiner-diode-40a","title":"Victron BCD 402 2 batteries 40A (combiner diode) - BCD000402000","description":"\u003ch1 style=\"color: #f87c24;\"\u003eVictron BCD 402 Battery Combiner Diode (2 Batteries, 40A)\u003c\/h1\u003e\n\u003cp\u003eThe BCD 402 is a diode based battery combiner rated at 40A, designed to charge two separate battery banks from a single charge source. It is suited to installers working on marine, leisure and off-grid systems where two batteries need isolated charging without the voltage drop and switching complexity of relay-based combiners. The diode design keeps the batteries electrically separated while both receive charge simultaneously.\u003c\/p\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCombines charge current from one source to two separate battery banks\u003c\/li\u003e\n\u003cli\u003eRated at 40A continuous current\u003c\/li\u003e\n\u003cli\u003eDiode-based design keeps battery banks isolated from each other\u003c\/li\u003e\n\u003cli\u003eNo moving parts or relays, reducing points of failure in the charging circuit\u003c\/li\u003e\n\u003cli\u003eCompact housing at just 0.49 kg, suited to tight installation spaces\u003c\/li\u003e\n\u003cli\u003eSuitable for use with a single alternator, solar controller or charger feeding two banks\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3 style=\"color: #f87c24;\"\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eDiode battery combiners work by allowing current to flow from the charge source to each battery bank while preventing current from flowing back between the two banks. This means a starter battery and a leisure battery, for example, can share one charging source without one bank draining into the other when the engine is off or the charge source is disconnected. Because there are no moving contacts, there is nothing to wear out mechanically over the life of the installation.\u003c\/p\u003e\n\u003cp\u003eThe trade-off with diode combiners compared to relay-based isolators is a small forward voltage drop across the diode, typically in the region of 0.5 to 0.7 volts. Installers should account for this when setting charge voltages, particularly where charge controllers are not compensating for the drop. The BCD 402 is rated for 40A, so it is important to size it correctly against the maximum output current of the charge source being used.\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\u003eNumber of batteries supported: 2\u003c\/li\u003e\n\u003cli\u003eRated current: 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 with separate starter and house battery banks\u003c\/li\u003e\n\u003cli\u003eMotorhomes and campervans charging a leisure battery alongside a vehicle starter battery\u003c\/li\u003e\n\u003cli\u003eOff-grid cabins with a single charge source feeding two battery banks\u003c\/li\u003e\n\u003cli\u003eBackup systems where isolation between battery banks is required for reliability\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 battery combiner diode unit\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 installer familiar with DC electrical systems and battery bank wiring. Confirm the combined charge current does not exceed the 40A rating of the unit, and allow for the diode voltage drop when configuring charge controller output voltages. Correct cable sizing and fusing on each battery output is required for a safe installation.\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-battery-combiner-diode-40a","provider":"VoltaconSolar","version":"1.0","type":"link"}