Determination of the current-voltage characteristic curve of individual photovoltaic modules as well as of a module string up to max. 1500V and max. 15 A. By simply pressing a button, the current power (MPP), peak power, short-circuit current and open-circuit voltage are displayed on the graphic display in a few seconds and are automatically converted to standard test conditions (STC).The measured characteristic curves converted to STC are also displayed and compared with the characteristic curves specified by the manufacturer. This allows conclusions to be drawn immediately about the current quality status of the PV modules. The measurement data and the characteristic curves can be stored in the I-V500w after the measurement with 3 reference numbers (system, string, module number) and an additional text comment and transferred to the PC or iPad/tablet via the optically isolated interface or via WLAN and evaluated for further processing (protocol).A database with the characteristic dat