{"product_id":"enerdrive-12v-24v-140a-dual-sense-voltage-sensing-battery-isolator-relay-low-voltage-ip54","title":"Enerdrive 12V\/24V 140A Dual-Sense Voltage-Sensing Battery Isolator Relay, Low Voltage, IP54","description":"\u003ch2\u003eAutomated Dual-Battery Management for 12V and 24V Systems\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eEnerdrive 12V\/24V 140A Dual-Sense Voltage-Sensing Battery Isolator Relay\u003c\/strong\u003e is engineered to provide reliable, automated management between your vehicle's starting battery and auxiliary house bank. In any mobile power setup, ensuring your primary starting battery remains charged while running 12V or 24V accessories is critical. This voltage-sensing relay (VSR) monitors system voltage in real time, prioritising the cranking battery when the engine starts before safely linking the auxiliary bank for charging.\u003c\/p\u003e\u003cp\u003eUnlike basic isolators that can suffer from inaccurate switching, this unit features an integrated 10-bit microprocessor. This ensures precise voltage detection, engaging the relay once the charge voltage reaches 12.7V or higher, and cleanly separating the banks when the engine stops and voltage drops to 12.3V or below. This automated disconnection eliminates the risk of your fridge, lighting, or other auxiliary loads accidentally draining your starting battery while parked at a remote campsite or worksite.\u003c\/p\u003e\u003ch3\u003eThe Advantage of Dual-Sense Architecture\u003c\/h3\u003e\u003cp\u003eStandard single-sense isolators only monitor the primary starting battery. In contrast, the \u003cstrong\u003edual-sense functionality\u003c\/strong\u003e of this Enerdrive VSR monitors both the starting (Terminal 30) and auxiliary (Terminal 87) battery terminals. If you connect a solar panel, mains battery charger, or generator directly to your auxiliary battery, the VSR detects the rising voltage on the secondary side. Once the auxiliary battery reaches the engagement threshold, the relay links the banks together, allowing excess solar or mains charge to top up and maintain your vehicle's starting battery. This bidirectional charging capability adds significant value for long-term off-grid parking and seasonal vehicle storage.\u003c\/p\u003e\u003ch3\u003eBuilt for Demanding Mobile Environments\u003c\/h3\u003e\u003cp\u003eDesigned to handle substantial charge currents up to 140A, this low-voltage VSR is well-suited to high-output alternators found in modern 4WDs, commercial utility vehicles, camper trailers, and marine vessels. Compared to standard off-the-shelf relays that are prone to contact chatter and premature failure in harsh conditions, the Enerdrive VSR is housed in a sealed, weatherproof plastic enclosure with an IP54 rating. This protects the internal electronics against dust ingress and water splashes, reducing the risk of corrosion and electrical faults when installed under the bonnet or in damp marine compartments.\u003c\/p\u003e\u003ch3\u003eKey Features and Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e10-Bit Microprocessor Control:\u003c\/strong\u003e Delivers highly accurate voltage sensing and reliable switching without the rapid cycling common in lower-grade mechanical relays.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Sense Bi-Directional Charging:\u003c\/strong\u003e Allows charging from the alternator to the auxiliary battery, or from auxiliary solar and mains chargers back to the starting battery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Voltage Thresholds:\u003c\/strong\u003e Specifically calibrated to engage at ≥12.7V and disengage at ≤12.3V (in 12V systems), suiting specific alternator profiles and system requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Terminations:\u003c\/strong\u003e Equipped with robust threaded stud terminals for the primary and auxiliary battery connections to ensure secure, low-resistance cable lug attachment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP54 Weatherproof Enclosure:\u003c\/strong\u003e Sealed housing defends against dust and water splashes for dependable operation in 4WD, RV, and marine installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuick-Connect Control Tab:\u003c\/strong\u003e Features a dedicated blade terminal for straightforward minus wiring and optional start contact integration.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\u003cp\u003eWhether you are building a touring 4WD dual-battery system from scratch, outfitting a commercial trade vehicle, or upgrading a marine electrical layout, this isolator offers a straightforward, set-and-forget solution. It removes the need for manual battery switches and complex ignition-trigger wiring, simplifying your installation while protecting your starting power.\u003c\/p\u003e\u003cp\u003eUpgrade your dual-battery setup with the Enerdrive 140A Dual-Sense VSR today for dependable, automated battery isolation on your next off-grid journey or marine deployment.\u003c\/p\u003e","brand":"Enerdrive","offers":[{"title":"Default Title","offer_id":43632048308285,"sku":"EN-VSR1224LV-140","price":129.73,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/3918\/3933\/files\/enerdrive-140a-dual-sense-battery-isolator-en-vsr1224lv-140.png?v=1792906574","url":"https:\/\/www.solar4rvs.com.au\/products\/enerdrive-12v-24v-140a-dual-sense-voltage-sensing-battery-isolator-relay-low-voltage-ip54","provider":"Solar 4 RVs","version":"1.0","type":"link"}