I don't know.... But since H2 is not the fuel (it is the working fluid, the sun is the fuel) and as long as the loss is kept within reason, it seems like this

I don't know.... But since H2 is not the fuel (it is the working fluid, the sun is the fuel) and as long as the loss is kept within reason, it seems like this could generate enough energy to do some electrolysis and refill any lost H2.