Utilizing SBSP entails in-space collection of solar energy, transmission of that energy to one or more stations on Earth, conversion to electricity, and delivery to the grid or to batteries for storage.
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Electricity is generated in a system of solar arrays. Besides the solar arrays on the Russian element, the station currently has two photovoltaic modules on orbit, with two more scheduled to be delivered.
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An optical-fiber network is useful for this purpose for the prime reasons of low loss/long reach as well as immunity to electrical interference, ground loops and lightning. 1 Megawatt of output requires 4,000 to 8,000 solar panels, with a surface area of 8,000 m2.
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In the Swiss Alps, a pilot project combining solar tracking systems and helical wind turbines achieved: "Our base stations now work like camels - storing energy when resources are plentiful and conserving it during lean periods," describes project manager Marco Fischer.
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