WindStream Technologies has developed the MobileMill — a portable trailer which harvests both solar and wind power, designed for first responders at disaster sites where other power sources have been knocked out. WindStream developed the MobileMill at the request of the Indiana Department of Homeland Security. The portable energy unit adapts the hybrid technology of WindStream’s SolarMill, which combines solar photovoltaic panels and vertical axis wind turbines into one small scale, high density device. Often, the drawback of renewable energy products is their reliance on uncontrollable environmental factors — solar panels can only function in the daytime, while wind power generation is very unpredictable. By combining the two into an integrated device, WindStream’s SolarMill becomes an efficient and scalable consumer driven product — a single unit, installed on a user’s roof, can harvest almost 1000W.