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Technology Stocks : Energy Conversion Devices

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To: Allen Bucholski who wrote (8036)	11/1/2005 12:50:26 PM
From: Krowbar	of 8393

I especially like this from the same document...... A private house in Richmond (London) covered with UNI-SOLARâ PV shingles on the southern and northern slopes of the roof. Photo courtesy of Solar Century. On a private house in a suburb of London (Richmond), a 1.632 kWp UNI-SOLARâ PV-shingle roof has been installed in March 1999. It is the first PV-installation in the UK to be completely made using electricity generating shingles. The PV-system consists of two separate parts: 64 SHR-17 PV-shingle units are installed on the southern face of the roof (total rated power 1.088 kWp), while 32 SHR-17 PV-shingle-units were placed for testing purposes on the northern slope (total rated power 0.544 kWp). The roof inclination is 40°. The PV-shingle units are connected in 6 series strings of 16 units, which are distributed over three SMA Sunnyboy SWR700 inverters. In the period March 1999 until March 2000, the southern slope system generated a total of 900 kWh, corresponding to a specific AC-yield of 827 kWh/kWp for the full year. This yield is very high for UK standards, especially if one considers the location of the installation: an urban environment close to a large airport (London-Heathrow) that causes serious air pollution. A typical c-Si PV-system under the same condition would generate in London no more than 700-720 kWh/kWp per year [5], some 15% less. It is interesting to note that the northern face installation also had a high yield: 528 kWh/kWp for the same period. This yield is still some 64% of the one of the southern face installation despite the fact that the insolation on that plane is more than 45% less than on the southern slope. This is a clear indication that UNI-SOLARâ PV-products perform well under non-ideal orientations. How many crystalline systems can produce 64% of full sun exposure from the diffuse light of the rest of the sky? That's why we start producing from firstlight, while the others have to wait until the sun comes up to a higher angle. Del

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