Demand for PV is expanding at a new-high world record as an option for electricity generation, not only because solar energy is a renewable everlasting source but it has become one of the silver bullets to remedy pollution and global warming. The input solar energy for most parts of the world is known and an approximate record of 200 TW is captured by the Earth which is greater than the global population demand. With emerging development within the PV, the price of solar modules has decreased considerably and the character of PV panels allows easy and gradual implementation. Solar PV markets saw more capacity installed than ever before, with the strong demand in Europe, the United States and rapidly growing markets making up for a substantial decline in China. Solar PV accounted for high shares of electricity generation in countries including Honduras (10.7%), Italy (8.6%), Greece (8.3%), Germany (8.2%) and Chile (8.1%). In 2019, an estimated 18 countries added at least 1 GW of new capacity, up from 11 countries in 2018, and all continents contributed significantly to global growth. By the end of 2019, at least 39 countries had a cumulative capacity of 1 GW or more, up from 31 countries one year earlier . Fig 1. below shows the global trend in PV from 2009 to 2019 with an annual addition of 115 GW compared to 2018.
 “Renewables Global Status Report - REN21.” https://www.ren21.net/reports/global-status-report/ (accessed Apr. 01, 2021).