I agree solar panels' weight shouldn't be a big problem.
About the fake, their car has suspiciously the same proportions than the BMW i3 and they have been accused of using many parts of an i3 in the past. But I want to believe they are trying for real. The i3 has a carbon fiber roof by the way.
I am suspicious of this product, but using an i3 as base and just designing the photovoltaic cover seems like a good idea, they don't have to sustain the costs of developing a full electric car and can still deliver on their main value added (the "self charging" bit).
It's not a fake if its still in development, which it clearly is