Indoor Photovoltaic Energy Harvester with Rechargeable Battery for Wireless Sensor Node

Extending the lifetime of the wireless sensor node is a critical issue facing the developing of the wireless sensor networks. One of the solutions is employing the energy harvesting technologies to collect renewable energy from the ambient environment. For indoor Wireless Sensor Network (WSN) applications, the chosen of the energy harvester is based on the requirements of the application and the environment. Our application will be used in offices and hospitals so using a noiseless technology is required. So, the photovoltaic energy is the best solution which matches the requirements. In this paper, we will present the design of the photovoltaic energy harvesting system with mathematical modeling and the results of the real experiments.