... F-60KVA,SBW-F-100KVA,SBW-F-150KVA,SBW-F-200KVA,SBW-F-250KVA,SBW-F-300KVA,SBW-F-320KVA,SBW-F-400KVA,SBW-F-500KVA,SBW-F-600KVA,SBW-F ... is an electric device that is designed to automatically maintain a constant voltage level.In easier ... words its job is to make sure that your precious electrical appliances ... 1.8 when calculating total power,so to insure it can also have excellent load ...