The 7SEMI MPPT Solar Charger is a compact, high-efficiency charging module designed for 3.7V Li-ion and 18650 batteries. Powered by the CN3791 MPPT controller, it maintains optimal solar power harvesting even during low-light conditions.
Key Features
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CN3791 MPPT charging IC
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Supports 1S Li-ion / Li-poly batteries
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True MPPT tracking for maximum solar power
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Solar input typically 5–18V
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Automatic CC/CV charging
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Charge status indication
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High-efficiency switching architecture
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Plug-and-play connectors for battery and solar
Applications
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Solar IoT nodes
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Off-grid battery charging
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Weather and environmental sensors
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Solar-powered LoRa / GSM / ESP32 projects
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Portable solar chargers
- Battery:
- 3.7V Li-ion or 18650
- Solar input:
- 5–18V typical
- Charge current:
- up to 2A (panel dependent)
- MPPT:
- Built-in voltage sampling algorithm
- Protection:
- Over-voltage, short-circuit, reverse polarity, over-temperature
