Developers enter largest green hydrogen PPA in US with 345 MW of wind to power facility

a 30-ton hydrogen plant, which will require about 80 MWh at full capacity, Shrestha said. That's where the PPA comes into play.

30 tons from 80 MWh translates roughly to 4.5 Nm3/kWh (based on hydrogen's density of 0.0832 kg/m3 at 18 C and 1 bar pressure). They're talking about an entire plant so that would include the Balance of Plant energy requirements (rectifiers, transformers, pumps, compressors, separation & purification units...). Not bad.

The PPA was sized so that the wind farm's average generation is matched with the electrolyzers' 24-7 demand for energy, according to Mark Goodwin, president and CEO of Apex Clean Energy. When wind production exceeds the plant's needs, the excess energy will be put out on the grid via an interconnection in the Texas grid. When production falls below what's needed, Plug will draw power from the grid.

It looks like their electrolyzers aren't yet cheap enough to cycle in tandem with wind power's variability. Pity. This is exactly why the cost of electrlyzers need to come down ASAP.

/r/RenewableEnergy Thread Link - utilitydive.com