Though, energy conversion efficiency of PRO and RED are very good, 50% and 30% respectively, commercialization of these methods are restricted by cost and fouling of membranes which suffer from deteriorated ion selectivity and inadequate mass transportation. Elongation of life time of membranes is the most challenging task for these two methods to be implemented successfully in making of SGP station. Over past two decades, fabrication methods are advanced exceptionally, also the membrane technology. Thus, we may expect reduction of installation and maintenance cost of RED and PRO based electric power generation in near future.