{"product_id":"11-1v-3a-pwm-solar-charge-controller-li-ion","title":"11.1V 3A PWM Solar Charge Controller | 3S Li-ion Regulator (OHS-3S)","description":"\u003ch2 class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eSmart Solar Management for 3S Li-ion Batteries\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eThis\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e11.1V Solar Controller\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cspan\u003e \u003c\/span\u003eutilizes an advanced PIC microcontroller to deliver highly stable, interference-free charging specifically for 3-cell (3S) Lithium-ion battery packs. By employing a high-efficiency PWM (Pulse Width Modulation) charging mode, it significantly extends your battery's lifespan while maximizing the energy harvested from your solar panels. It features comprehensive electronic protections—including overcharge, over-discharge, and reverse polarity protection—making it incredibly safe for DIY off-grid power systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eDual MOSFET Circuit for Maximum Efficiency\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eThe internal charging circuit features a dual MOSFET series design that cuts voltage loss by nearly 50% compared to traditional diode-based solar controllers. This ultra-low resistance architecture ensures that more solar energy reaches your battery, boosting overall charging efficiency by 3% to 6% and keeping the module cool during continuous 3A operation. The controller also utilizes discharge rate correction, which dynamically adjusts the termination voltage based on how fast the battery is discharging, perfectly matching the inherent characteristics of lithium-ion cells.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eAutomated Lighting Control with Power-Off Memory\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eYou can easily automate your DIY solar street lights using the controller's three selectable working modes: Normally Open, Pure Light Control, and Light Control with Timer. Furthermore, the built-in power-off memory chip automatically saves all your parameter settings. This ensures your system recovers seamlessly and maintains its timer configurations after a complete battery drain, without requiring any manual reprogramming.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003ePro Tip from Our Technicians\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eWhen wiring this\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong class=\"ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003ePWM Solar Regulator\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"ng-star-inserted\"\u003e, our Sham Shui Po technical team strictly advises connecting your 11.1V Li-ion battery to the controller\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003efirst\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e, before connecting the solar panel. This sequence allows the MCU chip to correctly recognize the battery voltage and initialize the protection circuits. Always use insulated tools and install an inline fuse between the battery and the controller to prevent catastrophic short circuits.\u003c\/span\u003e\u003c\/p\u003e","brand":"Sun Cheong Computer Company Limited","offers":[{"title":"Default Title","offer_id":48111926444183,"sku":"21TS000903","price":88.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0440\/4022\/4919\/files\/ohs-3s-11v-3a-pwm-solar-charge-controller-front.jpg?v=1786171433","url":"https:\/\/scccltd.com\/products\/11-1v-3a-pwm-solar-charge-controller-li-ion","provider":"Sun Cheong Computer Company Limited","version":"1.0","type":"link"}