The global shortage of freshwater resources worldwide, particularly in KSA, has tremendously influenced the development of desalination technologies, with electrodialysis desalination (ED) being one of the most well-known and respected techniques. In this study, a module was designed for an experiment on electrodialysis desalination. Under batch mode, operation factors including applied voltage, flow rate and feed concentration were investigated. The optimal operating parameters were 20 V of applied voltage, 200 ml/min of flow rate, and 40000 mg/L of dosage. With a high saline concentration of 40000 mg/L NaCl diluted to 1560 mg/L, the ED achieves a removal efficiency of 97.05% and an energy consumption of 2.03 Wh/L. In Jeddah, Saudi Arabia, where the salinity of the Red Seawater is 42420 mg/L, we utilize these optimal conditions to desalinate the water and produce water with a salinity of 1272 mg/L valid for aquacultural, industrial, agricultural, and municipal usage with a removal efficiency of 97 %, a recovery percentage of 83.33% and an energy usage of 2.03 Wh/L. The RO unit we utilize generates water with a removal efficiency of 97.74%, a recovery percentage of 64% and an energy consumption of 3.2 Wh/L.  We observed that the ED unit uses less energy, costs less, and wastes less water when we compared its performance to that of a RO unit. If solar energy is used instead of DC electricity, we can save more money and energy.