1.Dual automatic and manual operating modes allow flexible solar panel testing with a clear digital display showing real-time measurement data. 2.Built-in safety protections include overvoltage, overcurrent, overtemperature, and reverse polarity to help protect both the tester and PV modules. 3.Advanced MPPT algorithm supports accurate maximum power point tracking with up to 200 sampling points and storage for 30 test records. 4.Measures key photovoltaic parameters including open-circuit voltage, Pmax, Vmp, and Imp, supporting up to 1600W power, 3–90V voltage, and 0–40A current. 5.Compact and lightweight design with a rechargeable battery enables convenient field testing, featuring data hold, low battery alert, and auto shutoff.