The real influence on the generated energy during the year has the average intensity of solar radiation falling on 1 m\({}^{2}\) multiplied by the number of working hours of the module under study [7]. This parameter takes into account both the direct and indirect impact of the sun on the panel surfaces. Poland is located in the temperate climate zone, warm group, transitional type. The highest insolation in Poland is found in the Lubelskie, Podkarpackie, Malopolskie, Opolskie, Dolnoslaskie, Lodzkie provinces, as well as the southern parts of the Mazowieckie and Wielkopolskie provinces, with the highest values in the southern part of the Lubelskie province amounting to nearly 1100 \(\frac{\text{kWh}}{\text{m}^{2}\cdot\text{year}}\). In central Poland, the insolation ranges from 1022 to 1048 \(\frac{\text{kWh}}{\text{m}^{2}\cdot\text{year}}\). In the rest of the country, the insolation is slightly below 1000 \(\frac{\text{kWh}}{\text{m}^{2}\cdot\text{year}}\). The least insolation in Poland occurs in the Zachodiropomorskie and Pomorskie provinces. The city with the highest annual electricity received from photovoltaics, where the installation with a capacity of 1 kW produces an annual average of 1096 \(\frac{\text{kWh}}{\text{m}^{2}\cdot\text{year}}\), is Rzeszow followed by Lublin and Tarnow (1084 \(\frac{\text{kWh}}{\text{m}^{2}\cdot\text{year}}\) each) [9,10]. For example, in Malaysia, a country with high sunshine levels, solar energy is the main alternative system for electricity generation that reduces greenhouse gases [11,12]. Malaysia lies in the equatorial climate belt and consists of two regions: Peninsular West and East Malaysia, with very high solar potential (22-24 \(\frac{\text{M}}{\text{m}^{2}}\) and 14-24 \(\frac{\text{M}}{\text{m}^{2}}\) per day [13]) for electricity generation. In order to compare the conditions in Poland and Malaysia, the values of daily insolation were converted into annual insolation. The value for Malaysia varies between 1423 \(\frac{\text{kWh}}{\text{m}^{2}\cdot\text{year}}\) and 2435 \(\frac{\text{kWh}}{\text{m}^{2}\cdot\text{year}}\). In addition, the energy produced each day varies only slightly throughout the year. This is due to the length of the day in the equatorial belt. Its length throughout the year is practically unchanged; the longest day lasts for 12:18 h and the shortest for 11:56 h. In this case, it is much easier to design installations to meet the energy needs of the consumer, and no long-term energy storage is required. Very good conditions for electricity generation from the sun could meet the energy needs of the population at a projected level of 23.1 GW in 2019, which was a 39.47% increase over the peak demand in 2013 [14]. The degree of efficiency of the module under specific operating conditions has a key influence on the output power. In most cases, e.g., due to the conditions in Europe, Standard Test Conditions (STC) are taken into account. They define the module working temperature at 25 \({}^{\circ}\)C and the amount of solar energy falling on the panel at 1000 \(\frac{\text{W}}{\text{m}^{2}}\)[15]. Therefore, it can be assumed that the efficiency given by the manufacturer is the \"output efficiency\". Its value will change depending on changes in parameters specified by STC. Its value is directly influenced by manufacturing technology and materials used for production. Poland is a favorable area for investment in photovoltaic systems because a cooler than tropical climate is conducive to converting solar energy into electricity. Annual insolation in Poland amounts to an average of 990 \(\frac{\text{kW}\text{m}}{\text{m}^{2}}\). The sunniest months are June, July, and August--these months account for about 43% of annual radiation. It has been estimated that about 77% of the annual radiation energy in Poland falls on the six warmer months of the year (April to September) and only 23% from October to March.