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The dominant perturbation in the first case is the tidal component of solar gravity . Designed to simulate launch vehicle events such as movement from wind , orbiter ignition and liftoff , effects of solar heating and cryogenic shrinkage . Certain plant diseases which are soil borne can be controlled with some success through a process of solar heating . On the other hand , declined are dressers , drawing room suites , sideboards , and other general furniture , as well as solar water heaters , motorcycles and scooters . Development continues on solar cell design and car power supply requirements such as heater or air-conditioning fans . For the past two decades researchers have tried to break the “ 40 percent efficient ” barrier on solar cell devices . The company , which now promotes itself as " Beyond Petroleum , " anticipates doing $ 1 billion a year in solar commerce by the end of the decade .