1. Solar panels are marked with "+, -" when they leave the factory, just like the electrical appliances we usually buy! During the manufacturing process, everything is measured with a meter! \r\n2. It is best to have a multimeter. One can distinguish positive and negative poles, and the other can measure voltage and current to adjust it to the most suitable voltage and current for electrical appliances. It has the same effect as a voltage regulator. \r\nFor more information on how to distinguish the positive and negative poles of solar panels, enter: https://m.abcgonglue.com/ask/50996a1615781251.html?zd to view more content
How to distinguish the positive and negative poles of solar panels?
Introduction How to distinguish the positive and negative poles of solar panels? 1. Solar panels are marked "+, -" when they leave the factory, just like the electrical appliances we usually buy! During the manufacturing process, all measurements are measured using