| Solar Photo Voltaic Modules are best known as a | | | | installed 45% of all photovoltaic, but a change in |
| method for generating electric power by using | | | | law limiting the feed-in tariff is expected to cause |
| solar cells to convert energy from the sun into | | | | a precipitous drop in the rate of new installations |
| electricity. The Solar Photo Voltaic Module effect | | | | there, from an extra 2500 MW in 2008 to an |
| refers to photons of light knocking electrons into | | | | expected additional 375 MW in 2009. |
| a higher state of energy to create electricity. The | | | | Perhaps not unexpectedly, a significant market |
| term photovoltaic denotes the unbiased operating | | | | has emerged in off-grid locations for |
| mode of a photo-diode in which current through | | | | solar-power-charged storage-battery based |
| the device is entirely due to the transduced light | | | | solutions. These often provide the only electricity |
| energy. Virtually all photovoltaic devices are some | | | | available. The first commercial installation of this |
| type of photo-diode. | | | | kind was in 1966 on Ogami Island in Japan to |
| Solar cells produce direct current electricity from | | | | transition Ogami Lighthouse from gas torch to |
| light, which can be used to power equipment or | | | | fully self-sufficient electrical power. |
| to recharge a battery. The first practical | | | | World solar photovoltaic (PV) installations were |
| application of photovoltaic was to power orbiting | | | | 2.826 gigawatts peak in 2007, and 5.95 gigawatts |
| satellites and other spacecraft, but today the | | | | in 2008, a 110% increase. The three leading |
| majority of photovoltaic modules are used for | | | | countries represent nearly 89% of the total |
| grid connected power generation. In this case an | | | | worldwide PV installed capacity. According to |
| inverter is required to convert the DC to AC. | | | | Navigate Consulting and Electronic Trend |
| There is a smaller market for off-grid power for | | | | Publications, the estimated PV worldwide |
| remote dwellings, boats, recreational vehicles, | | | | installations outlooks of 2012 are 18.8GW and |
| electric cars, roadside emergency telephones, | | | | 12.3GW respectively. Notably, the manufacture of |
| remote sensing, and cathodic protection of | | | | solar cells and modules had expanded in coming |
| pipelines. | | | | years. |
| Average solar irradiance, watts per square meter. | | | | Germany was the fastest growing major PV |
| Note that this is for a horizontal surface, whereas | | | | market in the world from 2006 to 2007. By 2008, |
| solar panels are normally mounted at an angle and | | | | 5.337 GWp of PV was installed, or 35% of the |
| receive more energy per unit area. The small | | | | world total. The German PV industry generates |
| black dots show the area of solar panels needed | | | | over 10,000 jobs in production, distribution and |
| to generate all of the world's energy using 8% | | | | installation. By the end of 2006, nearly 88% of all |
| efficient photovoltaic. | | | | solar PV installations in the EU were in grid-tied |
| Cells require protection from the environment and | | | | applications in Germany. Photovoltaic power |
| are usually packaged tightly behind a glass sheet. | | | | capacity is measured as maximum power output |
| When more power is required than a single cell | | | | under standardized test conditions. The actual |
| can deliver, cells are electrically connected | | | | power output at a particular point in time may be |
| together to form photovoltaic modules, or solar | | | | less than or greater than this standardized, or |
| panels. A single module is enough to power an | | | | "rated," value, depending on geographical location, |
| emergency telephone, but for a house or a | | | | time of day, weather conditions, and other |
| power plant the modules must be arranged in | | | | factors. Solar photovoltaic array capacity factors |
| multiples as arrays. Although the selling price of | | | | are typically under 25%, which is lower than many |
| modules is still too high to compete with grid | | | | other industrial sources of electricity. Therefore |
| electricity in most places, significant financial | | | | the 2008 installed base peak output would have |
| incentives in Japan and then Germany, Italy and | | | | provided an average output of 3.04. This |
| France triggered a huge growth in demand, | | | | represented 0.15 percent of global demand at the |
| followed quickly by production. In 2008, Spain | | | | time. |