Upgraded EY-1600W: Compared to the previous generation, our new exclusive EY1600W can double the maximum test power. You can use it to test any individual solar panel from 5 to 1600W or any combination of parallel solar panels (Note: Due to the combination of solar panels in series, the current may exceed 60A, so the combinations in series and more than 60A cannot be tested) Solar panel spec tester: Our solar panel multimeter is designed to detect the voltage, current and power of the solar panel and evaluate whether your solar PV is working well. And distinguish the difference in quality between different brands of photovoltaic panels with our solar tool. Or to find the best angle or space for solar panel position. Upgraded Exclusive Tester: Upgraded with large LCD screen which can be read clearly in sunlight. And fully automatic VOC voltage can be read in any mode. Suitable for portable solar panels, foldable solar panels, solar PV kits, car/boat solar, roof solar panels, etc. Compact and portable: our solar module tester Smart MPPT is packed with EVA package, two types of connection cables for different connection needs and the total weight is only 176g. You can put it in any of your tool kits or carry it with you like a wallet. No Battery Needed: Our solar PV tester does not require a battery, just connect wires to solar panel, then it can work. It has two MC4 connection cables and two long enough alligator clip cables. Multi-protection for safety: Our solar multimeter has multiple protection functions such as overvoltage protection, overheating, overcurrent and overvoltage. Ensure safe work for the user. (Important: the total power of the panel should not exceed 1600 W). Note: Be sure to disconnect the photovoltaic board from other devices or loads before testing.