TY JOUR TI TECHNICAL AND ECONOMIC ASSESSMENT OF PHOTOELECTRIC SYSTEM APPLICATION FOR POWER SUPPLY OF AGROBUSINESS OBJECT KW photovoltaic system KW agro-industrial complex facility KW cost of generated electrical energy KW payback period JO Vestnik of Kazan State Agrarian University AU Daus, Y.V. AU Yudaev, I.V. PY 2023 IS 18 PB Kazan state agrarian University