Sustainable Products, Projects and Green Design The Sun House Sustainable Social Building by SunEdge PV Technology Co., Ltd The Sun House is a sustainable building designed to generate and reuse energy on site. The roof and exterior walls are made of solar panels with a total capacity of 65.57 kW. The interior is built mostly from recycled cypress timber, reshaped into ceilings, flooring, furniture and partitions. A heat pump system circulates heat to regulate the temperature, and collected rainwater is stored in a ten ton tank for garden irrigation. The building provides 440 square meters of indoor space and aims to be self sufficient.