West Holdings Corporation mainly engaged in design, construction, sale, operation and maintenance of public and industrial solar power generation system, as well as provision of esco business of energy saving service, and sale of electric power. The Company operates in four business segments. Renewable Energy segment engages in construction and sale of public and industrial photovoltaic power generation system, and construction, sale and wholesale of photovoltaic power generation system and other environmentally friendly remodel business. Energy Conservation segment engages in total energy saving service, and construction and sale of roofing, outer wall, earthquake proof construction and other building conservation remodel business. Telectric Power segment engages in power producer and supplier (PPS) business, and sale of power using solar power generation system. Maintenance segment engages in management and maintenance of photovoltaic power generation system and related facilities.