Techno-Economic Analysis of Second-Life Residential Battery Storage Systems: A Simulation-Based Comparison Across European Countries

Retired traction batteries from electric vehicles can be repurposed for a second life as residential energy storage systems. However, their economic viability strongly depends on local electricity prices and household load profiles. This thesis therefore investigates how second-life battery storage systems age under country-specific conditions in Germany, Spain, and Norway, and evaluates their economic performance. The analysis is based on a custom-developed, PyBaMM-based battery degradation simulation with a graphical user interface. By comparing the remaining useful lifetime and economic profitability of these systems, recommendations for their deployment are derived.