{"product_id":"enerdrive-12-24v-140a-epower-voltage-sensitive-relay","title":"Enerdrive 12\/24V 140A ePOWER Voltage Sensitive Relay","description":"\u003ch2\u003eIntelligent Dual Battery Isolation and Split Charging for 12V and 24V Systems\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eEnerdrive ePOWER 140A 12V\/24V Voltage Sensitive Relay (VSR)\u003c\/strong\u003e provides automated dual battery management for vehicles, marine vessels, and off-grid setups. Engineered with an integrated 10-bit microprocessor, this battery isolator continuously monitors your primary starting battery and automatically manages the charge path to your auxiliary battery bank. By prioritising the starter battery during initial engine cranking and charging phases, it eliminates the risk of a flat starting battery while running high-draw 12V or 24V accessories such as fridges, lighting, and inverters.\u003c\/p\u003e\u003cp\u003eUnlike traditional diode-based battery isolators that suffer from inherent voltage drop, the ePOWER VSR features direct mechanical switching with zero voltage loss. This ensures your secondary battery receives the full charging potential from your alternator. With automatic 12V and 24V system detection and a continuous 140A rating, it is a reliable solution for standard alternator charging in 4WDs, campervans, caravans, and commercial vehicles.\u003c\/p\u003e\u003ch3\u003eHow the ePOWER VSR Operates\u003c\/h3\u003e\u003cp\u003eWhen your engine starts, the starting and auxiliary batteries remain isolated, directing all alternator output to replenish the primary cranking battery. Once the system charge voltage reaches 13.2V (or 26.4V in a 24V system), the VSR engages, linking both batteries in parallel for simultaneous charging. When the engine is turned off and the system voltage drops below 12.8V (or 25.6V), the relay disengages to isolate the batteries. This allows your auxiliary battery to continue powering onboard loads without discharging the main starting battery.\u003c\/p\u003e\u003ch3\u003eMicroprocessor-Controlled Reliability\u003c\/h3\u003e\u003cp\u003eBasic thermal or mechanical relays often suffer from relay chatter—rapidly switching on and off when heavy loads cause temporary voltage sags. The Enerdrive ePOWER VSR solves this problem using intelligent battery monitoring and a built-in 60-second minimum charge time, alongside a fast-off disconnection protocol if voltage drops critically low. Furthermore, its bipolar switching capability allows charge current to flow in either direction, meaning if you connect a mains battery charger or solar regulator to your auxiliary battery, the VSR will also top up your starter battery once the auxiliary bank is full.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eZero Voltage Drop:\u003c\/strong\u003e Direct contact switching ensures maximum alternator charge efficiency compared to conventional diode splitters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto-Detecting 12V\/24V Operation:\u003c\/strong\u003e Seamlessly integrates into both 12V passenger vehicles and 24V commercial or marine electrical systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-Bit Microprocessor Control:\u003c\/strong\u003e Prevents relay chatter, false triggering, and premature wear through precise voltage sensing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBipolar Switching:\u003c\/strong\u003e Enables bi-directional charging when an external solar or AC charger is connected to the house battery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Low Standby Draw:\u003c\/strong\u003e Consumes just 1.5mA in the off state to preserve battery capacity during extended storage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact IP54 Housing:\u003c\/strong\u003e Splash and dust-resistant enclosure with heavy-duty M6 brass stud terminals for secure engine bay or cabin mounting.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBuilt for Harsh Marine and Automotive Environments\u003c\/h3\u003e\u003cp\u003eConstructed in a compact, IP54-rated enclosure, this voltage sensitive relay is protected against dust ingress and water splashes, making it suitable for under-bonnet automotive installations and marine engine bays. The heavy-duty M6 brass terminals accommodate up to 20mm2 battery cabling for secure, low-resistance connections, while the 6.3mm faston control terminals allow for straightforward ground and start-override wiring.\u003c\/p\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e4WD dual battery systems and touring canopies\u003c\/li\u003e\n\u003cli\u003eMarine vessels, boats, and yachts with dual banks\u003c\/li\u003e\n\u003cli\u003eCaravans, camper trailers, and motorhomes\u003c\/li\u003e\n\u003cli\u003eCommercial service vehicles and mobile workstations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDocuments and Manuals\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/enerdrive.com.au\/wp-content\/uploads\/2024\/10\/EN-VSR1224-140-Installation_Rev-1.1-1.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eePOWER VSR 140 Installation and Operation Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/enerdrive.com.au\/wp-content\/uploads\/2018\/12\/EN-VSR1224-160-Installation1.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eePOWER VSR 160 Installation and Operation Guide\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/enerdrive.com.au\/product\/140a-12-24v-voltage-sensitive-relay\/\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eManufacturer Product Page\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eUpgrade Your Dual Battery System\u003c\/h3\u003e\u003cp\u003eProtect your starting power and optimise your auxiliary charging with the Enerdrive 140A Voltage Sensitive Relay. Add it to your system today for dependable, automated battery isolation on your next off-grid or marine journey.\u003c\/p\u003e","brand":"Enerdrive","offers":[{"title":"Default Title","offer_id":43624905441341,"sku":"EN-VSR1224-140","price":96.3,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/3918\/3933\/files\/enerdrive-140a-12v-24v-battery-separator-en-vsr1224-140.jpg?v=1792903426","url":"https:\/\/www.solar4rvs.com.au\/products\/enerdrive-12-24v-140a-epower-voltage-sensitive-relay","provider":"Solar 4 RVs","version":"1.0","type":"link"}