Some Practical Aspects of H21. Using electrolisis AKA green hydrogen, more energy is used to produce it than it delivers. 55 Kwhr vs. 33 Kwhr. 2. Assuming a cost of $0.11 per Kwhr the cost for a small distributed H2 gas station which can service 500 cars and uses 11.7 MW is about 25 million dollars with a plus or minus 30 capital cost. The price is about $8.00 per kg or around 9 dollars us a gallon not including taxes. The cost per mcf is about 40 bucks roughly 12 times natgas. I assume a power cost of 11 cents per kwh which I'd what I pay in the west Kootenays. I wont even start on safety.