Transport & Environment have done some studies - https://insideevs.com/news/332584/efficiency-compared-battery-electric-73-hydrogen-22-ice-13/ https://insideevs

Transport & Environment have done some studies - https://insideevs.com/news/332584/efficiency-compared-battery-electric-73-hydrogen-22-ice-13/ https://insideevs.com/news/332584/efficiency-compared-batter... Turns out battery charging and inverting has lower losses than electrolysis and compression.