Interested in Module Measurements?
Photovoltaic (PV) module measurements at NREL include current versus voltage (I-V) under simulated and outdoor conditions to increase measurement accuracy and reduce uncertainty.
Simulated Module Current versus Voltage
We use two I-V measurement systems to assess the performance parameters for PV modules under simulated conditions:
- Spire 5600 SLP pulsed solar simulator
- Large-area continuous solar simulator.
The following table is a condensed list of characteristics for module I-V measurements under simulated light.
|System||Special Features||Light Source||Dimensions||Voltage||Bias|
|System 0.2- to 1-sun module I-V||Special Features 30- to 100-ms flash; sweep both directions||Light Source 2 xenon flash lamps||Dimensions 200 cm × 137 cm||Voltage 1 mV /250 V||Bias 0.1 mA / 25 A|
|System 1-sun modules||Special Features 100% duty-cycle continuous light allows the sample to be in any state prior to measurements; spectral irradiance measured; user-controlled bias||Light Source 25-kW xenon lamp||Dimensions 170 cm × 130 cm||Voltage 5 mV / ±300 V||Bias ± 1 µA to ±60 A|