RE: ORDERS4 Oct 2022 13:28
You did, sturm didn't, that was the post I was responding to initially.
And you then go on to get it all wrong, 4x 2.5kW is a system that can generate 10kW, so every hour 10kWh, it's a flow process, not a battery.
You really have no clue how these work do you.
A fuel cell takes h2 in and feeds out electricity and water, it doesn't hold h2, the only h2 in the 'cell' is what's being processed at that time. When you run out of h2 in a cylinder you change cylinder, or the manifold manages it. There is no 'max it can hold', so it's like a genset in that respect, the device that creates the electricity and fuel tank for that are two separate items of kit.
Something else you need to understand, these fuel cells unlike precious metal cells, can use impure h2, from memory 99% pure vs 99.999% pure. This is significantly cheaper and like running a genset on used chip fat vs super premium diesel. Other fuel cells get 'poisoned' by the impurities, alkaline cells don't seem to care.
Something further else you need to know, on the larger units they have attached an ammonia cracker to fuel cell, so you feed it ammonia (much much easier to transport and much more energy dense) and it converts to h2, and uses that, this is also impure, so is not an option for many other cells, but that's cheaper and more readily available than h2.
There's an image from klunk just below/above this.