Solar Cell (PV Cell) is very fragile, and what is one is broken?
Sure, you can replace one cell, but it will be much easier replacing one whole panel and this might be cheaper too.
So, the blind can fold down to pretty small volume that can easily be carried around, can we use it as portable unit?
Yes, but you might break it.
Then I saw my son playing with LEGO(R) Blocks.
Can I make one like a Lego blocks so I can make anything, like Car Shade to charge the car while parked at the airport parking lot. Take it to camping, so I can charge my phone and computer, or even run a small fridge.
Easy to replace broken if it ever breaks, and make any configuration I want (1.5V, 5V, 9V, etc)
Sturdy, so It will withstand some stress.