What bothered me was the lack of scientific possibility surrounding the new energy source. They mentioned that it was hydrogen based. Hydrogen has a melting point of −259.14 °C/ −434.45 °F so the solid crystal piece they held several times throughout the movie was not possible. At room temperature and pressure it would have quickly vaporized.

Further, hydrogen has been used as a fuel source for automobiles and has many disadvantages including the need to be pressurized and very cold for packaging. Explained well here: (https://m.youtube.com/watch?v=AouW9_jyZck). Storage size might not be as critical for a house but without cooling and pressurization the storage tanks would be huge. Showing a giant storage silo or underground tank in the movie would have made it more convincing.