Abstract  Eskilstuna Strängnäs Energi och Miljö is an energy company that provides electricity to its customers in the Eskilstuna and Strängnäs region. The company is currently facing stability problems in its electrical grid caused by a change in load patterns and increased implementation of renewable energy sources. Research has shown that batteries can provide flexibility which allows stabilisation on these evolving grids. The purpose of this thesis is to evaluate how a grid connected battery and its inverter can provide stability in a distribution grid where the production of electricity suddenly changes. To get the results that were requested, a simscape-MATLAB model was used, which follows the IEEE requirements for inverter-based resources. The results from the simulation were presented in multiple graphs and revealed the capability of a battery to restore a balance between production and consumption of electricity very quickly. The results also showed that a grid forming inverter provides a faster response from the battery, allowing it to stabilize the grid faster than a grid following inverter. The results showed that the grid forming inverter is more suitable for the future electrical grid that is getting weaker than the grid following inverter