Green hydrogen is being produced today at around $2.30/kg at Ningxia in China. The actual price they quote is $0.20 per cubic meter, [here](https://www.upstream

Green hydrogen is being produced today at around $2.30/kg at Ningxia in China. The actual price they quote is $0.20 per cubic meter, [here](https://www.upstreamonline.com/energy-transition/chinese-company-starts-commissioning-worlds-largest-solar-powered-hydrogen-project/2-1-999379 https://www.upstreamonline.com/energy-transition/chinese-com...), which if you work backwards from a density of 0.089kg/m^3 at SSL conditions give roughly $2.24 per kg. That's a 200MW facility; a much larger 2.1 GW facility has just started construction in Inner Mongolia and is expected to come online in 2023. It's possible this facility reaches price parity with grey H2 just based on economies of scale. Also, 33kWh is the upper bound for the energy you get out of hydrogen. Practically, a fuel cell will get 60-70% of that, depending on the type. Electrolysis is around 90% efficient today, depending on the type of electrolyzer, and how you measure. SOECs can get better than 100% apparent efficiency by utilizing waste heat. Most sources I've seen for green H2 put the threshold for economic viability at around 2c per kWh. At that price you're still more expensive than grey, but you're at least within spitting distance, and this seems to line up with the Chinese figures.