This was my Junior Design project. The goal of this project was to charge a large sealed lead acid battery and a smaller lithium-ion battery from a solar panel. Our finished product included light sensors and a stepper motor to rotate the solar panel so that it receives the most light possible throughout the day and an AC power inverter to provide power to external devices. We had a custom PCB manufactured to manage the input from the light sensors and control the stepper motor. We had also developed a charging board for the lead acid battery to provide proper charging stages. I had built two MOSFET switches to serve as emergency cut-offs that were controlled by a micro-controller with temperature and current sensors. The other part of the project that I was responsible for was the circuitry to charge the Li-ion battery. Additionally, I modified the enclosure we used to work for our specific purpose and then mounted the PCBs inside and wired them together.