Today, solar cells are manufactured at the industrial level mainly from polycrystalline and monocrystalline silicon. Solar elements made of silicon make up more than 90% of the solar elements that are produced worldwide. Depending on the seasons of the year in the Ferghana Valley, the movement of the Sun, geographical location, air humidity, temperature changes, the intensity of light falling on the surface of solar panels and other parameters, the characteristic (I-V) of solar panels was studied. The installation of solar panels installed at Andijan State University consists of the installation, commissioning and analysis of the results obtained on sunny, cloudy, sunny-cloudy days during the month at a certain angle due to the climatic conditions of Andijan. Andijan was installed at an angle of 380 degrees relative to the horizontal, depending on the geographical location of the panels. These installed panels are of two different types, one consisting of two solar modules consisting of monocrystalline solar cells (maximum 3 kW) and the other consisting of polycrystalline solar cells (maximum 3 kW). Our first module (monocrystalline solar cells), which we installed, works in the grid system, that is, it transmits the electrical energy coming from the solar panels directly to the electrical network using the "Sunleaf 500TL"inverter. The second module (polycrystalline solar cells) works in the battery system, that is, it transfers the electrical energy coming from the solar panels to the battery using cones, transfers the electrical energy in the battery to the consumer using a hybrid inverter "Inverter/charger" (model: EP18-4048). According to the results, polycrystalline solar panels can provide a certain amount of energy even on winter days. In addition, several tests of solar modules made of monocrystalline silicon were carried out. One of them is their current-voltage characteristic (I-V). Of course, this characteristic can be used to determine several parameters of solar cells and photo batteries.
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 https://tanders.ru/uz/solar-panels-set-use-of-collectors-andsolar- panels-in-the-heating-of-the-house/
Алиев, Райимжон; Каххоров, Жамшидбек; Мирзаалимов, Авазбек; Мирзаалимов, Наврузбек; and Рашидов, Бобур
"Development and implementation of a photovoltaic power plant with a capacity of 3-6 kW with “smart greed” elements in the conditions of the Fergana Valley,"
Scientific Bulletin. Physical and Mathematical Research: Vol. 3
, Article 8.
Available at: https://uzjournals.edu.uz/adu/vol3/iss1/8