Renewable energy procurement (REP) is gaining increasing importance globally as a policy instrument in driving energy diversification and sustainable development agendas, yet little is known about the institutional dynamics of how these policies evolve and integrate with broader energy sector reform agendas. In this paper, we discuss the institutional changes and interactions between REP policies and electricity sector reforms in China, South Africa, and Ethiopia. We argue that, for newly industrialised and developing countries, REP is embedded in the complexity of long-term sectoral reforms to serve various policy goals such as improving energy access and energy security, enhancing governance efficiency, or attracting private investment, along with assisting the transition to a modern and sustainable energy system. The introduction of REP into the prevailing energy system will inevitably impact on existing actor networks, institutional arrangement, and configurations of power and interest among key public and private entities, particularly when it involves foreign investors and newly established regulatory entities. Therefore, REP should not be viewed as a mere technical instrument: rather, it has the potential to destabilise the current political establishment and institutions in perspective countries. To be successful, REP must be designed to suit the specific historical and institutional context of a country and maintain a considerable level of flexibility to accommodate potential alternations as sectoral reforms proceed. This forward-looking strategy will inevitably demand strong state capacity in designing and implementing REP.