> The generation price of solar energy is ~$0.02/kwh. Even with 33% overall efficiency hydrogen could be very competitive at $0.06/kwh electricity. , But overall efficiency is a red-herring. The important thing is COST. With solar, the cost of energy itself is the smallest part - providing it at the desired time and place are the more expensive parts.

I'm not sure what you're saying here. Hydrogen produced with green energy necessarily also includes the price of that green energy. So hydrogen produced with solar has a price floor of the solar energy with all the inefficiencies of hydrogen electrolysis and use of hydrogen in a fuel cell on top of it.