Actually. you would need to have the solar cell on the front as well, as this is the side uppermost when the Kobo is near a light source and being used.
I am not sure how much the Kobo uses for power, my guess is nowhere near as much as a laptop.
We are getting a lot of solar panels installed on our roof next week so it's a topic uppermost in my mind. We will be producing 2.5 Kw of power - I guess that's like a giant solar cell for my house!
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