There's no question that Stan Meyer had something. But what he was doing evolved with time. He produced Hydrogen by chopping the output from an automotive alternator. He also showed the process as being workable at 48 Volts, what he called "an extremely low voltage". Then he said it needed to be "500 to 2,000 Volts", and later, at least a thousand Volts. So it's doubtful that there's a magic threshold at which an extra ten or fifteen Volts will suddenly make it all happen. Also, according to Wikipedia, electrical polarization can be produced at a very small potential. And there's the issue of electrode design, to produce his "rotating electric field".
He said that he deliberately gave wrong or misleading information at times, even covered up some details, to "maintain secrecy". Furthermore, he wasn't an expert scientist. His statement that the Oxygen is completely converted to energy during the cold fusion process just isn't right. (If this was the basis for his claim that one gallon of water contains as much energy as 200 barrels of oil, then that isn't correct.) He also presented the cold fusion as being caused by replacing orbital electrons with pi muons. At the time, muon catalysis was a scientific conjecture, but getting these particles isn't easy. So LENR is a more accurate description of the process.
With his lack of scientific understanding, his quest for secrecy, and his always improving technology, it's little wonder that replication is difficult. But I think the electrolysis part of his technology can be duplicated. The cold fusion part of it (the OU) will require more information, perhaps from someone who has made a related, 'accidental' discovery.
