In this chapter it is addressed the application of hybrid energy storage (HES) combining batteries and hydrogen energy storage in the off-grid/microgrid scenario within southern climates. Hybrid battery-hydrogen Power-to-Power electricity storage concept has been thoroughly assessed under the EU-funded REMOTE project that demonstrated the feasibility of the hybrid storage concept through on-site demonstrations and techno-economic evaluations. The HES demonstration plant installed in southern Europe in Spain (Gran Canaria) within REMOTE project has been selected as case study. This demonstrator is an energy storage solution for photovoltaic (PV) integration in the microgrid of a cattle farm. The chapter provides the detailed description of demonstration plant, including performance indicators calculated from its initial months of operation, the estimation of its environmental performance compared to base-case internal combustion engine generators, and the economic estimation of the Levelized Cost of Electricity (LCOE) and Storage (LCOS).