Last February 4th was held the kick-off meeting of the new research project Solar to hydrogen energy conversion efficiency using seawater, S2H, PLEC2021- 007718, funded by MCIN/AEI and by the European Union NextGenerationEU. S2H aims to generate new knowledge to improve the efficiency in the conversion of seawater into hydrogen through the use of solar energy. This project started last December and has a total duration of 36 months.