I didn't get round to giving you my impression of what I saw in the Jetstar yesterday. If you haven't seen one, it's a very well built unit. I'm an Engineer and have been involved in lots of manufacturing environments and product designs. There is no expense spared on the Jetstar's construction and it's materials. He uses copper where I would use aluminum, aluminum is the typical material for use in heatsinks [TC of 235 W/(m.K)] as it's a good conductor of heat and is lightweight. However copper is an excellent conductor [400 W/(m.K)] but it's much more expensive, and heavy. But, in Tom's mind, it has to be the best to make the unit as reliable as it is. The electrolyser is built like a tank. It electronic management systems seem to cover all eventualities, vibration isolation has been taken care of, great thermal management (but hot and cold) and the manufacturing process has constant QA and QC.

They have a unit in the lab which has run for 4 years continuous. It process a good, steady stream of hydrogen. Given the fact that it works, combined with it's construction, it's easy to see why it's the market leader. I would encourage anyone who hasn't seen it or is considering an investment in DYA to see this thing first hand, visit the plant and see what it's all about. It's probably the best DD you can do, IMHO.