Tanzania is among the countries with fast growing economies in Africa with an increasing energy demand. To achieve sustainable growth it's imperative to undergo transition into 100% energy from renewable sources. The transition to 100 % renewable energy needs to be planned based on reliable and viable baseline data, although the availability of such data is challenging in Tanzania. Decisive actions need to be undertaken to prevent the continuation hindrance to Energy sector development. Data-driven planning is key for an efficient, effective and just energy transition. Access the RE:Factsheet here: https://cantz.or.tz/publications/18