Data quality is essential in the modern world. The higher the quality of the data, the more information, knowledge and thereby wisdom can be retrieved. Besides better wisdom high quality data has another advantage: it can save costs since errors can be avoided. Low quality data is costing a lot of money to companies and will lead to information with more noise. The energy sector is also an industry where data is of great importance. Data quality is of importance in the electricity chain since a lot of parties depend on it. The greatest challenge emerging from this energy transition is the balance between decentralized electricity production and constant electricity consumption. However the data in the electricity chain is not always of great quality leading to problems. The main research question is: Which measures can be taken to improve data quality in the electricity data chain? Through a case study this will be explored.