1. Introduction
The photovoltaic (PV) module in the market is usually not equipped with solar-tracker to have better
performance. Users who buy this module will assign other party to install them at home/industry. Most of
the simple installation is by finding the best location and orientation with open and clear sky during the
day. And then, the system is installed with a fixed tilt and orientation. However, many systems have been
developed to be able for tracking the sun. The common method and more popular for example is by using