EVN Hanoi has discussed energy saving with its prime customers consuming more than 3 million kwh per year or having capacity of greater than 500kW. Thang Long, Quang Minh and Noi Bai industrial zones agree to EVN Hanoi not to exceed the amounts of consumption stated on electricity supply contracts, avoid overloads and cut from 5 to 10% of its energy consumption demand, equivalent to about 3302.43 to 6603.86 MWh.