{"product_id":"dc-12v-auto-power-switching-module-battery-failover-control-board","title":"DC 12V Auto Power Switching Module – Battery Failover Board","description":"\n\u003ch2\u003eDC 12V Automatic Power Switching Module – Battery Failover \u0026amp; Charging Control Board\u003c\/h2\u003e\n\u003cp\u003eKeep your DC-powered devices running without interruption. This \u003cstrong\u003eLOTHYE DC 12V Automatic Power Switching Module\u003c\/strong\u003e intelligently monitors your main power supply and instantly switches over to battery backup the moment power is lost — then seamlessly switches back when mains power is restored. Ideal for security systems, solar setups, UPS applications, and any 12V DC circuit that requires uninterrupted power.\u003c\/p\u003e\n\n\u003cp\u003eBuilt with high-quality components and a compact 69 × 48 × 18 mm form factor, this module features two onboard adjustable potentiometers (RP1 \u0026amp; RP2) for precise voltage threshold control, letting you set your own cut-in and cut-out battery voltage levels with ease.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAutomatic Failover:\u003c\/strong\u003e Instantly switches from mains to battery power upon power failure; switches back when power is restored\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable Voltage Thresholds:\u003c\/strong\u003e Set custom turn-on and turn-off battery voltages via dual potentiometers (RP1 \u0026amp; RP2)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e10A Control Current:\u003c\/strong\u003e Handles up to 10A, suitable for a wide range of 12V DC loads\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Easy to Install:\u003c\/strong\u003e 69 × 48 × 18 mm body with 61 × 41 mm (4 × Φ3 mm) mounting holes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClockwise \/ Counter-clockwise Tuning:\u003c\/strong\u003e Turn potentiometer clockwise to increase voltage threshold, counter-clockwise to decrease\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Application:\u003c\/strong\u003e Solar systems, backup power circuits, security systems, embedded electronics, and more\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eMade in Mainland China\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eControl Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eControl Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e69 × 48 × 18 mm (L × W × H)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e61 × 41 mm (4 × Φ3 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLOTHYE\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eHow to Set Voltage Thresholds (Example: Turn ON at \u0026lt;11V, Turn OFF at \u0026gt;13V)\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eInput 11V to the BAT terminal; measure pin 5 (CONT) — typically ~5.08V.\u003c\/li\u003e\n  \u003cli\u003eAdjust \u003cstrong\u003eRP1\u003c\/strong\u003e so pin 2 (TRIG) reads exactly half of pin 5 (CONT) — i.e., ~2.54V. Relay will activate below this threshold.\u003c\/li\u003e\n  \u003cli\u003eInput 13V to the BAT terminal; measure pin 5 (CONT) again — typically ~5.08V.\u003c\/li\u003e\n  \u003cli\u003eAdjust \u003cstrong\u003eRP2\u003c\/strong\u003e so pin 6 (THRES) matches pin 5 (CONT) — i.e., ~5.08V. Relay will deactivate above this threshold.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cem\u003eTip: Adjust the potentiometers gently and in small increments for the most accurate results. For other voltage values, fine-tune accordingly.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/360-bicycle-chain-cleaner-tool-gear-cleaning-kit\"\u003e360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.energystar.gov\/products\" target=\"_blank\" rel=\"noopener\"\u003eENERGY STAR product efficiency guidance\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does the DC 12V automatic power switching module do?\u003c\/h4\u003e\n\u003cp\u003eA: This module continuously monitors your primary DC 12V power supply. If the main power fails or drops below your configured threshold, the relay automatically switches the load to battery backup. When mains power is restored, it switches back seamlessly — ensuring uninterrupted operation for your connected devices.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I set custom voltage thresholds for the battery switchover?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The board features two adjustable potentiometers — RP1 sets the low-voltage turn-on point and RP2 sets the high-voltage turn-off point. You can configure any turn-on\/turn-off voltage pair by following the step-by-step calibration procedure described above.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the maximum current this module can handle?\u003c\/h4\u003e\n\u003cp\u003eA: The module supports a control current of up to 10A at 12V DC, making it suitable for most small to medium 12V DC loads including security cameras, LED lighting, sensors, and embedded systems.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How is the module mounted or installed?\u003c\/h4\u003e\n\u003cp\u003eA: The board has four Φ3 mm mounting holes arranged in a 61 × 41 mm pattern, allowing easy screw-mount installation into enclosures, panels, or project boxes. The compact 69 × 48 × 18 mm size fits neatly in tight spaces.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does the DC 12V automatic power switching module do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This module continuously monitors your primary DC 12V power supply. If the main power fails or drops below your configured threshold, the relay automatically switches the load to battery backup. When mains power is restored, it switches back seamlessly — ensuring uninterrupted operation for your connected devices.\"}}, {\"@type\": \"Question\", \"name\": \"Can I set custom voltage thresholds for the battery switchover?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The board features two adjustable potentiometers — RP1 sets the low-voltage turn-on point and RP2 sets the high-voltage turn-off point. 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