 For large commercial/industrial (C/I) and small & medium C/I customers, the cost in the first hour was Baht 29.55/kW and Baht 89.50 /kW respectively.Further research from EPRI indicates that residential customers’ cost tend to peak at USD 1.50/kW in the first hour and falls of to USD 0.46/kW in subsequent hours.On the other hand, large C/I and small & medium C/I suffer much higher losses of USD 10/kW and USD 38/kW respectively in the first hour.