content: That's the beauty:  It's all electric.  The lifting gas is hydrogen:  made onboard by electrolysis, with water collected by the craft itself.  The entire top is a massive lightweight solar panel, and all of the systems are electrical.  At the bottom of the craft will be a large hybrid battery/capacitor array, and also an onboard water storage tank for ballast/hydrogen production/drinking water/showering.  Also on the bottom will be gray water and brown water tanks.  Great question.  Keep 'em coming!