I am very impressed. I hooked up a voltmeter and it showed 19 volts in indirect sunlight. I figured it must be in direct sunlight. I'm not sure how many watts or amps it puts out, but I've found laminated solar panels to be very efficient. I also love how the panels are literally laminated into a board. The hinge doesn't look very strong but I plan to reinforce it with 2" velcro which I will use to attach it to the rooftop tent. The wires on the connectors are quite thin, but can easily be retrofitted. For charging a car battery at the output of 14.5 volts. like a generator. The supplied USB connector has a built-in small voltage regulator. At the other end of this connector are two interchangeable connectors. A cylinder output socket for connecting cigarette lighter plugs or alligator clips which are included. Comes with a good quality extension cord that fits all ports. On the back is a small output box with a 19 volt cylinder/cylinder connection and two USB ports. I didn't check the voltage of the USB outputs, but they charged my Samsung Note from 0 to 50% in about an hour. I also charged my Noko GB 40 starter generator but I didn't time it, I just plugged it in to see if it would charge. I was very impressed with the fact that the panels generate power in indirect ambient sunlight, meaning they should be able to generate some power even on cloudy days. How many did not measure. Definitely doesn't look or feel like a cheap piece of junk, but it's not a tank either. Overall I am satisfied and impressed with the first use. Update will take place later after further use.
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