MWAC, to be constructed by US-company First Solar, using CdTe modules, a thin-film PV technology. All three power stations will be located in the Californian desert. When the Solar Star project was completed in 2015, it was the world's largest photovoltaic power station at the time. Specialty Power Systems Photovoltaics may also be incorporated as energy conversion devices for objects at elevated temperatures and with preferable radiative emissivities such as heterogeneous combustors. Hybrid power systems Hybrid systems combine two or more modes of electricity generation together, usually renewable technologies such as solar photovoltaic (PV) and wind turbines. These systems often yield greater economic and environmental returns than wind, solar, geothermal or trigeneration stand-alone systems by themselves. Concentrated photovoltaics Concentrated solar power (CSP) systems generate solar power by using a combination of mirrors or lenses to concentrate a large area of sunlight onto a receiver. Electricity is generated when the concentrated light is converted to heat (solar thermal energy), which drives a heat engine (usually a steam turbine) connected to an electrical power generator or powers a thermochemical reaction. Transportation PV has traditionally been used for electric power in space. PV is rarely used to provide motive power in transport applications, but it can provide auxiliary power in boats and cars. Some automobiles are fitted with solar-powered air conditioning. A self-contained solar vehicle would have limited power and utility, but a solar-charged electric vehicle allows use of solar power for transportation. Solar-powered cars, boats and airplanes have been demonstrated, with the most practical and likely of these being solar cars. The Swiss solar aircraft, Solar Impulse 2, achieved the longest non-stop solo flight in history and completed the first solar-powered aerial circumnavigation of the globe in 2016. Solar vehicles Solar vehicle, whether ground, water, air or space vehicles may obtain some or all of the energy required for their operation from the sun. Surface and air vehicles generally require higher power levels than can be sustained by a practically sized solar array, so a battery assists in meeting peak power demand, and the solar array recharges it. Space vehicles have successfully used solar photovoltaic systems for years of operation, eliminating the weight of fuel or primary batteries. Spacecraft applications Solar panels on spacecraft have been one of the first applications of photovoltaics since the launch of Vanguard 1 in 1958, the first satellite to use solar cells. Contrary to Sputnik, the