The study explores the impact of power investment reforms on Ghana’s economic growth from 1980 to 2023, employing a positivist research philosophy and quantitative methods, specifically the Autoregressive Distributed Lag (ARDL) model. The study confirmed a short- and long-term relationship among variables based on cointegration analysis. Short-run results indicate that while current power investment reforms do not have an immediate statistically significant impact, there is a positive, albeit marginally significant, effect from reforms lagged by one period. Lagged gross capital formation and current total electricity consumption showed significant negative associations with economic growth in the short run, while population growth had a significant negative impact. In contrast, long-term analysis reveals a positive and marginally significant effect of power investment reforms on economic growth, affirming that sustained investments in the power sector are beneficial. Total electricity consumption, gross capital formation, inflation, transmission and distribution losses, trade openness, and population growth largely became statistically insignificant in the long run. Policymakers are urged to recognize the long-term benefits of power investment reforms and prioritize strategic, efficient, and sustainable investment strategies to enhance economic growth. For effective policy implementation, it is recommended to addressing potential short-term inefficiencies by establishing robust evaluation mechanisms for long-term investment interventions.