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Self-consumption for energy communities in Spain: a regional analysis under the new legal framework

European climate polices acknowledge the role that energy communities can play in the energy transition. Self-consumption installations shared among those living in the same building are a good example of such energy communities. In this work, we perform a regional analysis of optimal self-consumption installations under the new legal framework recently passed in Spain. Results show that the optimal sizing of the installation leads to economic savings for self-consumers in all the territory, for both options with and without remuneration for energy surplus. A sensitivity analysis on technology costs revealed that batteries still require noticeably cost reductions to be cost-effective in a behind the meter self-consumption environment. In addition, solar compensation mechanisms make batteries less attractive in a scenario of low PV costs, since feeding PV surplus into the grid, yet less efficient, becomes more cost-effective. An improvement for the current energy surplus remuneration policy was proposed and analysed. It consists in the inclusion of the economic value of the avoided power losses in the remuneration.

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