Limitations

Materials:
Should be no larger than a 1.2 metre cube
Should be no smaller than a .5 metre cube
Should use materials easily available in northern Chile (more information on materials and availability found on EK's blog)

Energy/Power:
Should be completely powered by the sun
Should not need extensive capacitor systems
Should not be contingent on a centralized power infrastructure
(information on exact power uptake available on EH's blog)

Information:
Should interact with the consumer easily and intuituvely
Should not need to be refilled more than 3 times per week
Should not need maintenance more than twice per month
Should cost between 100 and 150 USD

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