Bob Wyman for Congress (NY CD-10)

Can also use excess wind/solar to produce H2 for fuel cell vehicles. Less efficient to use H2 for stationary electricity due to far more conversion losses (electrolysis, compression, fuel cell) versus batteries.

Yes, that's certainly true. However, heat and mobility are just as important as electricity supply and here, one reaches dimensions that exceed my imagination of batteries. I think that this should be taken more into account when we think about solutions to the climate crisis.

Mark, are you sure it's "Less efficient to use H2 for stationary electricity due to far more conversion losses"? Modern power-to-gas is 63% efficient round-trip. Thats nothing like pumped hydro's 85%, but it can be centralized because there are already multiple unused pipelines..

Efficiencies of H2 system for producing electricity: electrolyzer (0.74); compressor (0.90); leakage (0.99); fuel cell (0.5-0.7); latent heat loss in water vapor (0.846) = 0.28 to 0.39 versus battery of 0.8 to 0.9 (with most of the lass during charging).

We're trying to eliminate combustion, so do not include CH4 in roadmaps, except digester or landfill methane that is use in a fuel cell. That methane would otherwise go to air. H2 in fuel cells is fine for transportation, because it is more efficient than internal combustion.