Анотация: Solar energy is very popular renewable energy source. Photovoltaic panels are necessary, to improve the efficiency of the panels are used maximum power point tracking (MPPT) methods. In this paper is made suggestion for a MPPT controller on the platform Arduino. The controller uses the P&O algorithm. The controller have the ability to write data to an sd card, display current time. The data that is written is used for analysis, for creating graphics