Solar Economy

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iNFo Little pyramids are used to bend the light rays that hit the electricity-generating surface of the panels. This increases energy generation by as much as 4%. th Nor t Wes t Solar panels are installed Eas facing the south. Sou th EU countries installed more than 20 GW of new solar photovoltaic (PV) capacity during 2011 which is almost the same amount than all other power capacity additions last year in the EU. Germany’s solar PV capacity was 25 GW at the end of 2011 which is about third of Germany’s average power consumption. Germany will produce about 5% of its electricity consumption with solar PV in 2012. Global PV capacity was 67 GW at the end of 2011. Italy installed 9 GW and Germany 7.5 GW new PV capacity in 2011. China, USA, Japan and India will be the biggest growing PV markets in the future. The building’s elements must not create shadow zones. In summer, the sun shines higher in the sky than during winter. Shadow area The price of the technology is no longer an obstacle to the mainstreaming of solar electricity. the surplus electricity on the electricity exchange for a price that is lower than the consumer price would not be financially profitable for consumers without the feed-in tariff,” notes Eero Vartiainen. Nor would over-sizing be feasible in terms of the entire grid. If a certain area has more renewable electricity than is consumed there, the surplus should be stored or transmitted elsewhere for consumption. Even though grids are becoming smarter all the time and new storage solutions are being developed, right now the solar electricity bottlenecks are transmission capacity and storage. Vartiainen envisions electricity consumption that flexes according to supply: when electricity is most expensive, consumers shift their consumption to a cheaper time. And when advancements in battery technology reach a point where the price of lithium batteries drops to a tenth of the current price, solar electricity can account for even more than one fifth of all electricity consumption. Fortum forAgendA 19

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