1、Multiple Protection: Solar panel MPPT tester has over temperature, over voltage, over current protection, PV panel reverse connection protection, over rated power protection. 2、Switching Mode: PV panel multimeter can switch manual or auto test mode without extra power supply. Measure PV panel open circuit voltage, measure PV panel class high power point. 3、HD Backlight: The solar panel MPPT tester adopts HD LCD display with its own backlight, clear under the sun, no batteries, solar panel power supply, no need for another battery. 4、Automatic Measurement: When pressing the automatic MPPT test button, the multimeter will test itself and refreshing the digital display according to the current power value. 5、Manual Measurement: When pressing the automatic MPPT test button, the instrument automatically adjusts the test interval time according to the current power value, the higher the power, the longer the interval time, and refreshes the digital display.