This working paper describes the preliminary environmental assessment for Case Studies 1 and 5 as described in the ESMAP report ‘The viability of cooking with electricity in Sub-Saharan Africa and South/Southeast Asia – a cost perspective’. The intention is to provide accompanying environmental information to the cost analysis, thus providing detail on two of the three sections of sustainability assessment, the final section being a social impact analysis. The assessment has been carried out using ReCiPe (H) midpoint and endpoint environmental impact categories. The study was conducted following the principles of BS/EN ISO 14040 and 14044 and other good practice systems.