Upgraded LCD Solar Panel Multimeter Multifunctional LCD Solar PV Panel MPPT Tester with Backlight for Photovoltaic Panel Item Type: Multimeter Material: ABS Model: EL400B Second Generation Size: Approx. 165 x 80 x 30mm/6.5 x 3.1 x 1.2in Power: 5-400W Current: 0-20A Power Mode: Solar Panel Power Features: LCD Display Function Gross Weight: Approx. 445g/15.7oz Target Audience: PV Panel Manufacturers, PV Panel Distributors, PV Panel Installers, PV Panel Users, PV Panel FansTROUBLESHOOTINGERRORCAUSEEXPLANATIONNo displayReverse connection protectionPlease check the input polarityDisplay over powerOver rated powerUsing within the rated power range of the instrumentDisplay over temperatureOver temperature protectionTo be used after coolingDisplay over voltageOver voltage protectionUsing within the rated voltage range of the instrumentDisplay over currentOver current protectionUsing within the rated current range of the instrument