RGBZONE 150 Amps Power Analyzer, High Precision RC Watt Meter with Digital LCD...
DROK Voltage Amp Meter DC, Battery Monitor DC 0-300V 200A, Ammeter Voltmeter for...
Handheld Digital Solar Power Meter (Pyranometer) 2000 W/m2, 634BTU / (ft2xh)...
WS400A Photovoltaic Panel Multimeter Solar Panel MPPT Tester Smart MPPT Solar...
If you are looking for a complete guide on how to test solar panels, you are going in the right direction as here you will get all the details thoroughly.