Recently, there is an urgent need for clean energy (renewable energy) to replace traditional energy for irrigation purposes, especially in new reclamation lands. There is also an important question about how renewable energy can become cost-competitive. So, the aim of the current investigation is the cost estimation at operation of water pumping system via various technologies i.e., photovoltaic and diesel systems under drip irrigation method. The experiments were done in a private farm located in Wadi El-Natrun desert represented the new reclamation lands in Egypt. The comparison ‘s findings indicated that the system cost of solar photovoltaic panels was less compared to the cost of the diesel generator system. Also, the water delivery for each kWh under the solar photovoltaic system is higher compared to that one of the diesel generator systems. Generally, it can be noticed that solar photovoltaic panels system possess a higher initial cost as compared to diesel systems. However, the solar photovoltaic panels system possess a lower recurring cost compared with the diesel system during the study period of time. The cost of solar energy/m³ of extraction water under the solar photovoltaic panels system was about 0.36 LE/m³ while using the convention diesel energy leads to cost of about 1.79 LE/m³.  Thus it can be noticed that the cost of utilization of solar energy represented by 20% of usage of diesel energy.  Generally, this would encourage farmers to care to utilization of the solar photovoltaic panels system to operate ground wells. Finally, the collected an obtained data recommended using solar energy.