Identification of the key energetic, environmental, and economic KPIs.

The key performance indicators (KPI's) for evaluating and comparing the performance of components and system configurations of the reference technologies and proposed storage systems will be provided. KPI will be defined at component level, e.g., storage solutions as well as at system level considering the configurations defined in Task 2.2. The defined metrics will take into account environmental, technological, energetic and economic aspects such as: i) energy (share of renewable energy, fossil fuel savings, primary energy savings, CO2 emissions savings, peak load reduction, etc.); ii) technology (volumetric storage energy density, complexity, availability, durability, efficiency, etc.); iii) environment and safety (toxicity, explosivity, lifetime, etc.); iv) economics: cost-effectiveness in terms of pay-back period, levelized costs of storage (LCOS) and levelized cost of energy (LCOE). Related tasks: 2.3.