22/10/2020
We have finite power from our father Sun: the solar hot water heaters, passive solar heating and solar roof, where solar energy must be used or stored in batteries for power at nights. Second, we have developed more universal technologies, which generate electricity. These systems include photovoltaics; the direct conversion of sunlight into electricity via semiconductors and concentrated solar power, the production of electricity via high-temperature steam turbines or thermodynamic engines. All solar technologies have been growing steadily over the past couple of decades, (Tesla's shingle roof). The progress has been truly remarkable with photovoltaics.
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