Power-to-Gas (PtG) is a technology that uses electricity to produce hydrogen through a process of electrolysis. This one can be used directly or, after appropriate conversation into syngas or methane, it can be used as chemical raw materials, burned to produce heat, or converted to electricity by means conventional gas turbines. The presence of generation from renewable sources is becoming larger and larger in our electrical systems, and this often causes the production being higher than the demand. In this context, the proper use of PtG represents an alternative energy storage to reduce the renewable curtailment. The study conducted in this thesis aims to improve the knowledge on the impact of a PtG inserted in a distribution network with the presence of photovoltaic (PV) generation, using the test technique known as Power-Hardware-In-the-Loop (PHIL).