40A MPPT Solar Charge Controller – Multi-Voltage Auto-Detect – WiFi Bluetooth App, 0V LiFePO4 Recovery, Full Reverse Polarity Protectio

• 【MPPT Solar Charge Controller – Multi-Voltage Auto-Detect】Supports 12V, 24V, 36V, and 48V battery systems. Automatically identifies system voltage—no manual setting required. Delivers full 40A charging at 12V and 24V. At 36V and 48V, rated continuous output is 25A—set by thermal design to maintain stable temperature under sustained high-voltage loads. ★ LiFePO4 batteries must have a certified BMS protection board.
• 【Solar Charge Controller – 0V LiFePO4 Battery Activation】If a LiFePO4 battery shuts down due to BMS low-voltage protection, this controller safely reactivates the BMS using solar input alone—no external power required. Programmable low-voltage disconnect adds protection during seasonal storage. Helps avoid unnecessary full battery bank replacement.
• 【Solar Controller Reverse Polarity Protection – Prevent Wiring Damage】Detects reverse polarity on both battery and PV connections before energizing circuits, locks out operation, and displays a clear fault code in the app. Correct installation sequence: ① Battery → ② Load → ③ Solar panel. Disconnect in reverse order.
• 【WiFi Bluetooth Solar Controller – Real-Time Status and Alerts】No onboard screen—view PV input, battery %, charge status, and fault history via the Noi Solar App (iOS/Android). Local Bluetooth setup; 2.4GHz WiFi for remote checks (5GHz not supported). BT password: 666666 (changeable in App).
• 【40A MPPT Solar Controller Specifications – 120V PV Input, 1040W@48V】Max 120V PV input. Recommended PV power: 390W@12V / 780W@24V / 975W@36V / 1040W@48V. Three-stage charging with Automatic Equalization for lead-acid batteries. TVS lightning protection.

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