There are existing companies that are sustainable, profitable...

There are existing companies that are sustainable, profitable and with a long history of delivering that are already in the same business. If you don't know that, I really don't know how to help you. As far as I can tell, there appears to be absolutely no innovation in what NVX proposes, which is exactly why there have been endless delays to the supposed NVX's production timelines and cash flows. A genuinely good product would not just be delayed in silence for so many years. Basic googling will help you to understand the industry and find who are the already established players.