I never reached the 120W power no matter how I set it. In addition, I found that the same plate assembly is made identical to many other assemblies. It's still good, but I'd say the power output is closer to 80w than 120. Now I have two panels that look the same and both work the same. They plug directly into my solar generator, a 300w unit which I mainly use to remotely power our projector but it works well for charging our devices and powering our laptops when needed. This battery also tells me how much the panels are charging. Laying it flat on the table I could only get 43 watts at first, adjusting for the sun and infinitely adjusting the position of the panel relative to the sun gave 73 watts. It does the job I need it to do to charge the battery so I won't complain too much but it lost a star due to false advertising. I will also post this review for another solar panel.
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