The DFRobot Micro Solar Power Manager is a compact MPPT (Maximum Power Point Tracking) solar charging module that harvests energy from small solar panels (6V–24V input) to charge 3.7V Li-ion and LiPo batteries while simultaneously providing a regulated 5V USB output. Its MPPT algorithm maximizes power extraction from the panel under varying light conditions, and built-in protection circuits guard against over-charge, over-discharge, and short-circuit events — making it a reliable power core for always-on outdoor IoT sensor nodes. Specifications Solar Input: 6V–24V (suitable for 5V–18V solar panels) MPPT: Maximum Power Point Tracking for optimal solar harvesting Battery Type: Li-ion / LiPo (3.7V nominal) Charging Current: Up to 900mA Output Voltage: 5V regulated USB output Output Current: Up to 1A (5V output) Protection: Over-charge, over-discharge, over-current, short-circuit Interfaces: JST Li-ion connector, Micro USB output, solar panel terminal Dimensions: Compact module, suitable for field deployment Key Features MPPT algorithm maximizes solar energy harvest from small panels (3W–10W) Charges Li-ion/LiPo battery while simultaneously powering the load 5V USB output powers Arduino, Raspberry Pi Zero, and ESP32-based boards directly Full battery protection suite prevents damage from over/under-charging Compact form factor for embedding in outdoor enclosures Works with any solar panel providing 6V–24V open-circuit voltage Suitable for always-on IoT sensor nodes powered entirely by solar energy Gravity connector compatible with DFRobot ecosystem Applications Solar-powered outdoor IoT sensor nodes (weather, soil, air quality) Remote wildlife monitoring cameras with solar recharging Off-grid Arduino and ESP32 data loggers Solar-powered Raspberry Pi Zero field stations Smart agriculture sensor networks with solar harvesting Emergency communication beacons with solar backup Educational solar power and energy harvesting projects STEM renewable energy curriculum demonstrations Package Includes 1x DFRobot Micro Solar Power Manager Module Note: Solar panel and LiPo battery sold separately FAQ Q: What size solar panel do I need? A: A 3W–10W panel (5V–18V) works well. Larger panels are fine — MPPT adjusts automatically. Q: Can I power an Arduino and charge simultaneously? A: Yes — the module provides 5V output while charging the battery. As long as solar input is available, both operate in parallel. Q: Does it work without a battery (solar-only mode)? A: Some models support pass-through mode. Check the Wiki for your specific variant. Q: How long to charge a 1000mAh LiPo from empty? A: At 900mA charging rate, approximately 1.5–2 hours in good sunlight with an adequate panel. Q: Is it weatherproof? A: The module itself is not sealed — mount in a weatherproof enclosure for outdoor deployment.
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