Ultra-Low Power Solar DC System Using Supercapacitor And Low-Power Environment Monitoring

Energy harvesting enables a new generation of wireless sensing systems by reducing dependence on finite power sources and enabling long-term autonomous operation. In this paper, an Ultra-Low Power Solar DC System Using Supercapacitor and SEPIC Converter for Environmental Monitoring has been explored within the broader context of energy harvesting sensor networks. The study reviewed existing energy harvesting sensor node implementations and applications to illustrate how design choices in storage and power management influence system efficiency and reliability. Particular attention was given to the use of supercapacitors as energy storage elements, which offer fast charging, high cycle life, and maintenance-free operation. The integration of a SEPIC DC–DC converter enables stable voltage regulation under fluctuating solar input conditions. Overall, the proposed approach demonstrates that combining solar energy harvesting with supercapacitor-based storage and efficient DC–DC conversion provides a robust and scalable solution for long-term environmental monitoring applications.

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