The purpose of the renewable energy use will be for crossing oceans and delivering aid. LTA Research and Exploration, the secretive and mysterious airship company owned by Google co-founder and former Alphabet President Sergey Brin, will use the biggest mobile hydrogen fuel cell in the world to power its disaster relief airship. The company releases very little information about itself other than basic aerospace research intentions.
Using the biggest mobile hydrogen fuel cells in the world would give these airships a vast range. Moreover, they are more appealing to this kind of craft as they are lighter than lithium-ion batteries and have the potential to be notably cheaper as well. This helps to explain why H2 is a renewable energy source in a growing number of aircraft projects worldwide.