Coronavirus Disease 2019 (COVID-19) has been destructive in various sectors of Malaysia. In the renewable energy sector, Malaysia thrives in harvesting solar energy, biomass energy, and hydro energy, but despite years of development, the impacts of COVID-19 on these fields remain significant. This paper reviewed, analyzed, and summarized the effects of COVID-19 on the renewable energy sector in Malaysia. According to reviews, solar energy projects experience postponements as the import of solar panels is halted. At the same time, biomass saw its productivity reduced as workers were sent home as a measure to curb COVID-19. The same can be seen with the hydroelectric dams, where a single case may form a cluster which, once again, puts the entire project on hold. These are just some examples of the disastrous impact of COVID-19. However, there are positive impacts as well. The reduction in CO2 emission and the investment in the renewable energy sector once fossil fuel drops its price are the same example testimonies. The future of the renewable energy sector after COVID-19 and the lessons learned from the impacts of COVID-19 are reviewed and presented in this paper as well.