The United States' once-vaunted solar-industry trade surplus with China disappeared between 2010 and 2011, according to findings released today by the Coalition for American Solar Manufacturing (CASM). The U.S. solar industry had an estimated $1.6 billion trade deficit with China in 2011, after enjoying an estimated $250 million to $540 million surplus in 2010. CASM's findings are based on data from the U.S. Department of Commerce and the U.S. International Trade Commission (ITC), as well as a prior study by GTM Research.
"This new data, drawn from official government sources, finally buries the Chinese importers' tired, shop-worn and factually incorrect talking point that the U.S. solar industry has a trade surplus with China," said Gordon Brinser, president of SolarWorld Industries America Inc., the largest U.S. manufacturer of solar cells and panels. "Chinese importers often claim that the modest U.S. trade surplus in 2010 proved that China is not threatening the U.S. solar industry and economy. But it is no longer 2010, and any trade surplus is history. Illegal dumping by massively subsidized Chinese solar producers, combined with curbed exports of polysilicon and manufacturing equipment, are decimating U.S. solar manufacturers, the supply chain and their export business."
WS501 series Compact Weather Stations for measuring of air temperature, relative humidity, solar radiation, air pressure, wind direction and wind speed. Relative humidity is measured by means of a capacitive sensor element; a precision NTC measuring element is used to measure air temperature. The world renowned technology of Kipp+Zonen CMP3 is integrated. Ultrasonic sensor technology is used to take wind measurements. Measurement output can be accessed by the following protocolls: UMB-Binary, UMB-ASCII, SDI-12, MODBUS. One external temperature or rain sensor is connectable.
The WS503 is a similar sensor available with a tiltable pyranometer for plane of array measurements of solar panels efficiency.
Surface temperature and rainfall accessory sensors are also available as add on to the weather station.