So, as a person who has used electrolysis to produce hydrogen, I can tell you that DYI units are typically low temperature and pressure, and that means really low energy conversion efficiency. If you are referring to these YT “hydroxy” production rigs, that is not only exceptionally dangerous, but ineffective at fueling any real power producing engine or fuel cell. We can review the chemistry and math involved if you wish, but hydrocarbons or anhydrous ammonia are much more dense methods to store hydrogen energy.