The X-dependence of the H2 + Ag(111) SRP48 PES is shown for molecular configurations including the top site (X = 0.0; Y = 0.0), for φ = 0◦, θ = 90◦ and rb = 1.57 Å. Full lines: interpolated PES; symbols: DFT results. The values of Z corresponding to different curves and sets of symbols are provided with matching color.