Feature 1Easy to Operate: The multimeter can detect automatic MPPT, manual MPPT detection without additional power supply. 2Protection: The solar panel MPPT tester has over voltage, over temperature, over current protection, and over rated power protection. 3Upgraded: This LCD solar photovoltaic panel multimeter belongs to the second generation upgrade series with backlight. 4Function: Solar panel multimeter is used to test the maximum power point and open circuit voltage of photovoltaic panels. 5High Quality Material: This solar panel multimeter is made of high quality ABS material, which is strong, stable and durable.Item Type: MultimeterMaterial: ABSModel: EL400B Second GenerationSize: Approx. 165 x 80 x 30mm/6.5 x 3.1 x 1.2inPower: 5-400WVoltage: 12-60VCurrent: 0-20APower Mode: Solar Panel PowerFeatures: LCD Display FunctionGross Weight: Approx. 445g/15.7ozTarget 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 .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Multimeter2 x Connecting Cable2 x Cable1 x English Manual1 x EVA KitNote1. Please be sure to use this product within the rated voltage & current power range.2. Please be sure to disconnect the photovoltaic board from other equipment or loads before testing.3. Please allow some errors due to manual measurement.