Low Irradiance IV Testing for Solar Modules
Perform Low Irradiance IV Testing on solar modules at our Accredited PV Laboratory.
What is the Low Irradiance IV test?
Low Irradiance IV 200W/m2 test is done under conditions which simulate low sun irradiance where several performance parameters, mainly Pmax (maximum Power) is measured to test and validate the parameters. LIC simulates and tests the performance of solar modules at higher latitudes and during winter.
How is the I-V curve affected by low Irradiance Conditions?
PV cells typically have lower efficiency at the low irradiance level. The shape of the I-V curve changes with irradiance and curve shape can change dramatically beyond a critical level of irradiance. This can result in some errors in evaluating the performance of the system at certain levels. Normally the irradiance loss varies for different PV modules in relation to standard 1000 W/m². A typical specification is that the normal efficiency at 200 W/m2 compared to 1000 W/m2 (25°C, AM 1.5) is at least 96.5% of STC efficiency.
Low Irradiance IV 200W/m2 and IEC 61215
Low Irradiance IV 200W/m2 testing is a performance parameter and one of the qualifying tests for IEC 61215. The Low Irradiance IV 200W/m2 test is carried out before Outdoor exposure test and after performance at STC and NOCT conditions as per IEC 61215.
