This study investigated the Effect of using Fabricated Motor – Generator device to teach Energy Concepts on Basic Science Students’ Achievement and Retention in Kaduna State, Nigeria. Two research questions and two hypotheses guided the study. The study employed quasi-experimental research design. The population for the study was 3741 JS2 students in North Senatorial District, Kaduna State, Nigeria. The sample of the study comprised 113 JSII students randomly sampled from two intact classes selected from public coeducational schools in North Senatorial District, Kaduna State, Nigeria. The instrument used for data collection was the Energy Achievement test (EAT). The reliability coefficient of the (EAT) was 0.86. Means and Standard Deviations were used to answer research questions while the Analysis of Covariance(ANCOVA) was used to test the hypotheses at a significance level of 0.05. The findings of this study reveal that the use of the fabricated Motor-Generator to teach Energy Concepts in Basic Science enhanced students’ achievement and retention than the conventional method. Based on the findings of this study, the following recommendations were made: Basic science teachers should be adequately trained on using the fabricated Motor-Generator device in the teaching through workshops and seminars. Curriculum planners like NERDC should incorporate the use of the fabricated Motor-Generator device to teach Energy concepts in Basic science.