A new smoothing technique named “Adaptive enhanced linear exponential smoothing (AELES)” is proposed to be utilized in energy storage systems to mitigate fluctuated power from PV distributed generations. The injected power to grid can effectively smooth out by the proposed technique, while the required energy capacity of utilized energy storage devices can be further reduced. AELES can achieve this advantage, because it can dramatically reduce the associated phase delay in its algorithm. To verify the performance of the proposed strategy, a measured PV profile is chosen to be smoothen with the proposed AELES. The key simulation results indicate that AELES accomplish better performance in both shorten phase delay and faster processing time.