This document discusses the design aspects of standalone solar PV systems. It begins by providing background on solar PV technology and India's solar energy potential. The key components of a standalone solar system are then explained - solar modules, batteries, charge controller, inverter. The document outlines the steps to design a system, including assessing the load, sizing the battery bank and solar panels. An example design for a 436W system is presented along with component selection and cost estimation of around 175,000 INR. Proper design considering location factors is emphasized to satisfy load demand economically.