Description
7.4V 8.4V 12V 2S 3S 4S 3A MPPT Solar Panel Controller
Efficiently charge your lithium-ion or LiFePO4 battery packs with the CN3722 MPPT Solar Charge Controller. Featuring advanced Maximum Power Point Tracking (MPPT) technology, this compact module extracts maximum power from your solar panel to significantly enhance charging speed and energy efficiency. Designed for 2S to 4S lithium 18650 battery configurations, it offers stable constant current/constant voltage charging, comprehensive battery protection, and high operational reliability under varying sunlight conditions.
The CN3722 supports input voltages up to 25V, perfect for diverse solar panel setups. With a 3A charging current (adjustable externally) and robust temperature operation (-40°C to +85°C), this controller is ideal for portable solar energy systems, off-grid applications, and DIY solar battery storage.
Key Features
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MPPT charging technology for >98% power utilization efficiency
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Compatible with 2S, 3S, and 4S Lithium-ion (7.4V, 11.1V, 14.8V) and LiFePO4 batteries
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Input Voltage Range: 6V to 25V DC (solar panel input)
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Maximum charging current: 3A (programmable via external resistor)
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Constant current / constant voltage battery charging
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Comprehensive protections: Overcharge, over-discharge, over-current, temperature monitoring
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High frequency switch-mode DC-DC converter design
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Large aluminum heat sink for thermal stability
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Dual status LED indicators for charging and battery state
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Compact size: approx. 50 x 30 x 1.6 mm
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Operating temperature: -40°C to +85°C
Applications
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Off-grid solar energy charging systems
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Portable solar power banks and battery packs
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Solar garden lighting and IoT outdoor devices
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Small-scale solar energy storage battery management