In this chapter, a new approach to address the challenge of efficient storage of renewable energy in batteries is solved by presenting the design and execution of a modified half-bridge converter capable of operating in both step-up and step-down modes to regulate the desired output voltage. The main aim is to design and simulate a single switch-controlled modified half bridge converter used for battery charging applications for an extensive range of solar input variations. The presented converter employs a single switch control methodology, where the duty cycle of one switch is adjusted while the other is kept constant. By dynamically varying the duty cycle of a single switch, the converter efficiently converts input power to match the requirements for charging batteries with a specified nominal voltage. Simulation with solar input and a battery load for both buck and boost test cases are performed on Simulink. A lithium-ion battery of nominal voltage 24 V and rated capacity 20.8 Ah is used to simulate the battery load. For the experimental setup, an Arduino microcontroller is used for driving both IGBTs, through the TLP250 driver IC. The converter circuit PCB is designed, fabricated and tested for both buck and boost modes of operation (12–46 V) for the desired output of 30 V in simulation and 20 V input voltage to 30 V output voltage in the solar input.