Atonometrics, a developer of PV test and measurement technologies, has developed a new suite of product offerings, which include the Irradiance Measurement System, the PV Module Soiling Measurement System and the PV Module Degradation Measurement System. By quantifying the effects of various elements on PV plant performance using on-site testing, the tools allow operators to mitigate risk and maximize return on investment.
As wary lenders look to safeguard solar investments with high-demand performance guarantees, a clear need has emerged for more accurate PV performance measurement at a project site. Using side-by-side module comparisons, PV power plant operators can demonstrate the real-world effects of factors like soiling and potential induced degradation at a given site to ensure long-term bankability.
In conjunction with the National Renewable Energy Laboratory (NREL), Atonometrics recently completed a study demonstrating the ability of a PV reference device (PVRDs) to reduce uncertainty in irradiance measurements to just ±2.4 percent, versus ±5.2 percent for other technologies. Module soiling is also another issue, which can cause monthly power loss rates of more than 10 percent, in turn reducing a project’s return on investment. The Atonometrics Irradiance Measurement System is designed to transform a cell or module planned for use at a project site into a PV reference device PVRD to measure insolation.
Commercial and utility-scale PV power plants, including most types of module technology.
Unlike current technologies, such as pyranometers, Atonometrics’ solution enables automatic compensation for changes in factors including seasonal effects, angle of incidence, spectral content and ratio of direct to diffuse radiation, resulting in better correlations with PV array power output.
September 2012 onwards.