Multifunctional voltage curve indicator up to 1500 V for maintenance and testing of single-phase systems. Measures the efficiency of single-phase photovoltaic systems. Measures IV characteristics of modules or strings up to 1500 V/10 A — 1000 V/15 A. Measures open-circuit voltage (VOC) of modules or strings (1500 V). Measures short-circuit current (ISC) of modules or strings (15 A). Enables testing and verification of IV curves, with optional remote SOLAR02 for synchronized measurements. User-updated module database for comparing measured data with nominal values. Current and voltage measurements are performed using a 4-wire method for accuracy. Displays IV curve at the end of testing, confirming compliance with panel specifications.