Features: Maximize Your Solar Panel Efficiency with Solar Panel Multimeter - The UltimateSolution for Testing MPPT and Measuring Power Output. With its Automatic and Manual MPPT Detection, Overvoltage, Overtemperature, and OvercurrentProtection, and no External Power SourceRequired, EL800w Solar Panel Multimeter is the Most Versatileand Reliable Tool for Solar Energy Professionals and Enthusiasts Alike. Whether you are a Solar Panel Installer, Maintenance Technician, or DIY Enthusiasts, Solar Panel Multimeter is the Choice for You to OptimizeYour Solar PanelPerformance and Ensure MaximumPower Output. Use Solar Panel Multimeter to Test Your Solar Panel's MPPT and Measure Its Power Output Anywhere, inRealTime. For Field and Lab Testing, Troubleshooting, and QualityControl. With Its Compact Size, Lightweight, and Robust EVA Tool, EL800w Solar Panel Multimeter is Easy to Carry and Store, Making It an Essential Tool for Any Solar Energy Professional or Enthusiasts. Specifications: Material: Plastic Power: 0.1W-800W Voltage: 12-60V Current: 0-20A Power supply: Solar panel power supply Size: Approx. 16.5x8x3cm/6.5x3.15x1.18in Package Includes: Solar Panel Tester x1 MC4Cable x1 CrocodileClip Wire x1 EVA Tools x1 User Manual x1 note: 1.AUTO MPPT check 2. Manual MPPT detection 3. Over voltage, over temperature, over currentprotection 4. Overrated powerprotection 5. No additional power required When the AUTO MPPT test button is pressed, the instrument will automatically adjust the test interval according to the current power value and refreshthe digital display. For example, when the solar panel power is 100W, refreshit every 5S. When power is 300W, refreshit every 15S. When the manual MPPT test button is pressed, the instrument begins to scan the maximumpower point and refreshthe digital display. 1. Please be sure to use this product within therated voltagerange & Currentrange. 2, before the test, be sure to disconnectthe photovoltaic panel from other equipment or load.