Model ISET - Balancing PV Monitoring Systems
From Measurement
Use in balancing monitoring systems for simple, fast and reliable information about the functioning and solar 'energy yield' of a PV plant. For site surveys, monitoring and other fields of survey technology.
Precise, high-quality solar radiation sensors for ...
- Precise, high-quality solar radiation sensors for PV plants
- Supplied with calibration certificate (based on EN DIN 17025), produced by the Institute for Solar Energy Supply Technology (ISET)
- High correspondence of measurement results due to use of the same technology as in PV generators
- Monocrystalline, polycrystalline, EFG and amorphous solar cell technologies available. Set-up uses same embedding in different modules.
- Simple and reliable registering of temperatures due to integrated temperature sensor PT 1000 via two-wire cable
- External temperature coupling through aluminium housing
- Sophisticated design and simple handling
- Price value in comparison to thermo-electric solar radiation sensors, which, however, have a different spectral sensitivity and different reflective and thermal characteristics and are only comparable to a real PV generator to a limited extent
- Long-lasting and with long-term usefulness, particularly in comparison with solar radiation sensors in the lower price category
Photovoltaic plant operators expect clear, rapid a...
Photovoltaic plant operators expect clear, rapid and reliable information on the function and solar 'energy yield' of their PV plants. Differing spectral sensitivity and reflective and thermal characteristics mean high-quality solar radiation sensors, usually thermoelectric, do not allow an easy comparison between the 'energy yield' and that of a real PV generator. The situation is compounded by the relatively high procurement costs.
However, lower price solar radiation sensors do not meet the long-term precision requirements and their 'cheap look' means their market acceptance is low, particularly in the buildings sector. The solar radiation sensor ISET Sensor solves these problems. Its physical properties are almost identical to those of an equivalent PV generator. Its simple and compact, yet precise form make it ideal for use in land and building surveying. Its design ensures it is accepted in the architectural sector in general.
Technical Features of the ISET Sensor
Technical Features of the ISET Sensor
Incoming solar radiation is converted into a proportional amount of current by a precisely defined solar cell. A special shunt resistor with a thermal connection to the compact aluminium casing calculates the measured voltage. Reproducible measurements are guaranteed thanks to the nearly identical geometric structure of the laminated cells (as in comparable PV modules) combined with the specially designed casing. The latter can be used to harness the outside temperature but are nevertheless extremely weather-resistant. A Pt 1000 temperature sensor measures the temperature of the cells via an ultra-precise two-wire line (!).
Calibration
Each ISET sensor is calibrated in W/m² with an identical control sensor from an accredited test laboratory; calibration is recorded in a calibration certificate - a quality guarantee.
Monitoring
The use of the ISET Sensor in a new monitoring concept makes it possible to compare the incoming solar radiation measured at the PV generators to the PV plant output (AC).The ratio offers a simple function and quality parameter for the PV plant. The cumulated energy yield gives solar module manufacturers, dealers and even installation engineers a basic 'record' for their products and thus a firmer basis for discussing or proving 'guaranteed' energy yields.
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