This article shows the change of pressure. Since the transmission power In remote areas of power station. Connect with In electrical network system is very small. Power quality By considering two case studies is Conditions of normal power At a distance far from the main power. Separate and independent state The results showed that in normal power conditions. To mitigate the volatility of electricity produced from PV generator with the appropriate size of a battery energy storage system.Presented in this article can alleviate voltage. And improve power quality To meet the standards set.Separate independent state Found that using the right size of BESS presented in this article can improve power quality. Produced by PV generator and can reduce the Diesel generator power during the time of the PV generator capacity sufficient to meet the energy requirements of the load. Support state power as well.