Ann: SOR Energy Ink - Energy from Moisture, page-36

Further on the weight and the footprint of Energy Ink vs solar, given the Energy Ink cells can be screenprinted at just 200 microns thick and your typical solar panel is between 4 to 5cm thick then for the footprint of one solar panel you could get between 200 to 250 Energy Ink sheets!

Obviously they would not be able to be stacked one on top of the other as there would need to be space at a minimum for air movement between the sheets, hence the Energy Ink Cube, but that would give some considerable advantages to the use of these Cubes in certain scenarios particularly if each sheet achieves equivalent energy density to solar and can attain a decent longevity / durability.