Half a croissant, on a plate, with a sign in front of it saying '50c'
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Electric car cover

Many circular sunscreens attached to each other
  (+3)
(+3)
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Hinged to each other, each two, open up like a pair of glasses, finally covering the whole car. Switch it "off" and they fold back in to one single folded up thingy.

O
- the folded car cover

OO
- stage 1, two of the sunscreens open side by side with a hinge and small servo in between

O
OOO
- stage 2 - each of the circles opened in two

_OOO
OOOO
_O
- stage 3 - again each one opened into two

_OO0
OOOOO
OOOO
_OOO
__O
- stage 4 - prpeparing to doulbe its size by opening up...

pashute, Jun 29 2016

Or do it like this... https://en.wikipedia.org/wiki/Miura_fold
Folding carefully... [neutrinos_shadow, Jun 29 2016]

[link]






       You forgot to mention the things should be covered with solar cells, to help recharge the car battery.
Vernon, Jun 29 2016
  

       One of your hoops on the last diagram has suffered an accident...
MaxwellBuchanan, Jun 29 2016
  

       I thought this was going to be an adaptation to the "Fake PHEV charging lead" idea.   

       This is cooler than I thought it would be. (+) Interesting.   

       Carry on.   

       Clever! bun [+]
whatrock, Jun 30 2016
  

       What makes this incompatible with non-electric cars?
notexactly, Jul 18 2016
  

       not-exactly, sorry-for the-missing hyphen. Its: Electric car- cover of-course.
pashute, Aug 04 2016
  

       And of course, the hyphen that matters is the one that gets caught by the line break.
notexactly, Aug 05 2016
  
      
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