The rapid evolution of solar energy researches during the last decades resulted in the installation of many solar energy systems over the world. But the installation cost is still high, so the data measurements. However, such effort requires detailed knowledge of system temperature and the site where the system will be installed. Thus, the development of automate database management systems is indispensable. Such systems typically consist of microcontroller-based unit for recording the signals of interest, while the collected data are usually transmitted to personal computers (PC) for storage and further processing. Automatic sensor-based data acquisition systems are currently used for both monitoring system performance and storing data. Data collected can be used to evaluate and measure the system performance during long periods [1], [2], [3] and [4]. Several data acquisition systems have been developed for use in a specific purpose such as monitoring the performance of photovoltaic (PV) systems, which include measuring, acquisition and processing environmental variables [5] and [6]. These systems depend manly on personal computers and highly expensive temperature sensors and microcontrollers.