There is a plethora of PV system sizing tools in the market. However, none of these tools are specifically designed to cater to the various needs of a system sizing for off-grid PV systems such as functioning of the system at very high temperatures, hybrid energy sources, maximum power extraction, optimal functioning of battery system and the ability to choose the optimal tilt angle for the solar array at the various locations around the world. All of these constraints are required to be met while working off-grid.