Let's do this. (This is one of several home designs I'm considering.) D esigned by Scott Specht studio architecture Spect Harpman Architects , the “ Zero House ” is a prefabricated house of 200 square meters totally autonomous and environmentally friendly. The roof is made of solar panels that provides electricity so you don’t have to worry about electricity and the power is then stored in a battery backup. Once completely charged, the home can run efficiently for one week without a hint of sunlight. The roof and also includes a tank of rainwater harvesting over 10 cubic meters. The ground floor when it is equipped with a unit of waste composting. The rest of the house features energy saving design strategies including ample daylighting (led lights are used for artificial light requirements), incredibly energy efficient wall assemblies (r-58 in fact), triple glazed windows, and a compact design (reducing overall energy requirements).