A wireless sensor network (WSN) consists of battery-operated sensor nodes. The lifetime of WSNs can be improved by implementing energy efficient protocol/hardware at either the network or operating level of the sensor node. The idea is to introduce a technique that has the potential to generate power. Energy harvesting is a technique in which power is extracted and stored from the ambient environment, for example, radio frequency energy, solar energy, thermal energy, wind energy, and acoustic energy. Efficient energy harvesting architecture, efficient energy transferring, good mechanical design for the transducers, for example, TEG, and an efficient framework are a few of the research challenges for energy harvesting techniques in WSNs. The solar energy is harvested from solar light with the use of a photovoltaic cell. Solar energy harvesting is the best choice as a power management mechanism as it is a reliable power source among other kind of energy sources such as wind, thermal, and vibration.