Key Takeaways PLUG faces headwinds with declining hydrogen site installations, negative gross margins and cash outflows.FLUX sees strong momentum with revenue and margin growth in material handling and ground support markets.FLUX gains from new airline customers and growing portfolio that includes G-Series G96, AI-based battery tech.Plug Power Inc. (PLUG) and Flux Power Holdings, Inc. (FLUX) are both familiar names operating in the clean energy market. As rivals, these companies are engaged in manufacturing ...