The aims of this study is to evaluate On-grid and Off-grid photovoltaic (PV) energy systems which exist in two different livestock enterprises (broiler and freshwater fish enterprises) in the province of Kahramanmaraş. Methods and Results:The electrical energy requirements of the enterprises were determined according to their installed power, PV system equipment and their properties were examined, their energy (electricity and fuel oil) costs were determined and economic analysis was made. As a result of the research examining the system design and costs in accordance with the energy requirements of the enterprises, both the broiler enterprise with a capacity of 300 kWh and the freshwater fish enterprise with a capacity of 49 kWh reach the breakeven point within 4 to 5 years and reduce the electrical energy costs to zero. However, because of the broiler farm using On-grid system supplies the excess electricity generated to the grid, it takes profit approximately 312000 TL per year. Considering that the PV solar system has a life span of 20 years, it is seen that their use in agriculture and livestock enterprises is highly profitable. Conclusions: As Turkey, despite the superiority in the solar energy potential in agricultural production cannot sufficiently benefit from this potential and energy produced in this field remains far below the total energy needs. The biggest reason for this is initial costs of photovoltaic (PV) energy systems are high compared to energy efficiency. Significance and Impact of the Study: Energy needs and costs in the agriculture and livestock sector are increasing day by day and become an important problem. In order to reduce these costs, electricity generation from solar and wind energy is becoming widespread in farms. It is thought that the research will be an example in terms of energy management and energy diversity with the use of PV solar energy systems in the field of agriculture and livestock.