Through four years of joint efforts of all parties, all project development, financing, installation & commissioning and operation of the "Koh Jik Recharge" project have been completed to establish a sustainable electricity consumption mode: On the island, the electricity during the day is supplied by the PV system, and the additional energy output is stored by lithium cells; at night, the stored energy supplies the islanders with electricity, thus meeting the electricity supply and demand on the island during day and night; in addition, all islanders have installed smart electricity meters to obtain electricity through prepayment; The Electric Power Commission helps the islanders prepay the electricity fee every Wednesday.