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Are there solar powered window blinds?
(sh.itjust.works)
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Solar glass yes. Solar blinds I don't know of anything that would be thin and flexible enough to roll and unroll everyday.
There are some think flexable solar panels, but nothing that I seen that you could use as a replacement blind in a roller blind.
Take a look into solar glass, you can retrofit some of these products right onto existing windows on the inside.
The one advantage to sollar glass is you don't have to keep your blinds down all the time especially if you want to enjoy a sunny day.
Edit: Seems I misunderstood the assignment.
Motorized Solar powered blinds where you don't have access to power.
https://www.amazon.ca/Motorized-Insulation-Complementary-Cordless-Automatic/dp/B0CWL7TFYP?mcid=cd45a4fde0803f77966b0a9d1947818a&tag=googlemobshop-20&hvadid=730828764438&hvpos=&hvnetw=g&hvrand=16448465338767325826&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9000966&hvtargid=pla-2338116708393&psc=1&gad_source=1