Europe's (mostly Germany) feed - in tariffs allowed for a much higher demand for solar panels. This caused commercial production capabilities to increase to the point of reduced costs. Additionally about half of the cost of a cell comes from the metallization, a drop I silver prices equals a drop in panel price. I should note that the cost of installing (installation labor and brackets etc)a solar panel is now about 4 times the cost of producing said panel.
Autotrophs and heterotrophs differ in the way they obtain energy autotrophs make their own energy whereas heterotrophs must consume other organisms to get their energy. Autotrophs are the producers of ecosystems which means they are the providers of â¦
 These reduced carbon compounds can be used as an energy source by  the autotroph and provide the energy in food consumed by  heterotrophs. More than 95% of all organisms are heterotrophic.[2]   A heterotroph is an organism that requires organic  substrates to get its carbon for growth and development.A  heterotroph is known as a consumer in the food chain. Contrast with autotrophs which use inorganic carbon dioxide or  bicarbonate as sole carbon source. All animals are heterotrophic,  as well as fungi and many bacteria.These reduced carbon compounds can be used as an energy source by  the autotroph and provide the energy in food consumed by  heterotrophs. More than 95% of all organisms are heterotrophic.[2]   A heterotroph is an organism that requires organic  substrates to get its carbon for growth and development.