Protection: The solar panel MPPT tester features overvoltage, overtemperature, overcurrent, and overrated power protection. Material: This solar panel multimeter is made of ABS material, making it sturdy, stable, and . Easy to Use: The multimeter can perform both automatic and manual MPPT tests without the need for an external power supply. Upgraded Version: This LCD solar photovoltaic panel multimeter is part of the second generation series with an upgraded backlight. Function: This solar panel multimeter is used to test the maximum power point and open-circuit voltage of photovoltaic panels., Manufacturer: Ounfhtrttk