Powering cellsites can be a real challenge for operators where it is difficult to provision mains electrical power and must use high-cost alternatives such as diesel generators. Cellsites powered by renewable energy can help lower these costs. Motorola has successfully run a year-long wind- and solar-powered cellsite at its Swindon R&D facility in the UK. The trial concluded that an optimized solar and wind solution can generate enough power to drive amid-sized base station (BTS) plus ancillaries. The next step will be a commercial customer trial using a 6-carrier BTS cellsite.