Performance degradation issues of PV solar power plant

P V solar power plants are planned to work for long time, monitoring of plant will ensure a safety and longterm operation. The photovoltaic system degradation of 10% per year in the year 1991 has reduced to 12% for 25 years due to modules manufactured after 2000. Some of the common and basic degradation issues in pv solar plants are discussed in this paper. The adequate maintenance is required for long term operations and increasing performance.