The use of autonomous solar photovoltaic (SPV) systems has emerged as a viable method for addressing the challenge of providing electricity in locations where traditional power grids are absent. The primary obstacles encountered in the process of creating such systems are outlined below: 1) The optimisation of power extraction from photovoltaic systems in response to rapidly fluctuating irradiance levels. 2) The achievement of a substantial increase in voltage gain through the implementation of a DC-DC converter. 3) The design and implementation of an effective power management strategy for seamless integration between solar photovoltaic systems and energy storage systems. Due to the need to fulfil several objectives, current autonomous system designs need a minimum of three conversion processes, resulting in a notable decrease in system dependability and efficiency. Various control techniques are employed to tackle the concerns. A modified non-iterative Incremental Conductance Maximum Power Point Tracking (MPPT) approach has been created in order to optimise power extraction. This method generates a finely adjusted duty cycle to accommodate rapid changes in irradiance, ensuring that the intersection point of the load line and the I-V curve consistently reflects the Maximum Power Point (MPP). A high voltage gain DC-DC converter is typically necessary for industrial applications. This may be accomplished by utilising a high duty ratio, which can lead to challenges such as reverse recovery issues and increased voltage stress on power switches. In order to address this issue, a proposed solution is the implementation of a soft switch interleaved boost converter (SSIBC). This converter operates by utilising zero current switching to activate the active switches, hence enabling it to attain a large voltage gain even at lower duty ratios. The lead acid battery is a type of energy storage technology commonly employed in solar photovoltaic (SPV) systems. To effectively control power, an algorithm is devised that utilises a variable direct current (DC) bus voltage system, using both a super capacitor (SC) and a battery (BAT) as energy storage systems (ESS). The effectiveness of the proposed control techniques is assessed and confirmed by experimentation conducted across a range of circumstances.