Journal of Electronic Systems Sandra Djosic, Milun Jevtic and Milunka Damnjanovic 14 1 2024 https://doi.org/10.6025/jes/2024/14/1/10-16 https://www.dline.info/jes/fulltext/v14n1/jesv14n1_2.pdf In this paper, we look at power consumption for fault-tolerant real-time systems. Specifically, we look at real-time systems where fault tolerance is reached by repeatedly running a task affected by the transient fault with time redundancy. We conduct a power consumption analysis for real-time fault tolerant systems using a heuristic-based dynamic voltage and frequency scaling algorithm that we developed. Simulation results demonstrate that our algorithm can be used successfully for power consumption based on fault tolerance analysis.