Comparison study between the performance of tracking and stationary solar photovoltaic systems in Malta

Abstract

The paper compares the performance of a 1.8 kWp stationary solar photovoltaic grid-tied system and a 360 Wp single-axis tracking system, for the period January to December 2001. Results show that the tracking system had succeeded in maintaining a relatively stable performance ratio, while the stationary system suffered from lower values, throughout summer. Wind gusts of up to 14 m/s were logged during this period but the tracking system, weighed down by concrete blocks, has remained in position on the roof. The tracking mechanism design proved to be rigid and simple to operate however a higher power-rated double-faced pilot solar photovoltaic module had to be used to drive the tracking motor. Analysis of data was carried out according to the guidelines set by the Joint Research Centre - Ispra Establishment.