Excellent 30W panel. Look no further, this is the best. Right out of the box I hooked up a multimeter and the panel read 19.7 volts and 1.7 amps. I connected the panel to a solar charge controller that had a 12V battery connected to it. The battery was 11V when I connected the panel. I put the panel, battery and controller in the sun for six hours and tested the battery again. It showed 12.44 volts. I was very impressed. Very impressive, very well done. Fast delivery.