The Electret Energy Storage System (EESS) achieves an advancement in the energy storage field due to high energy/power level densities integrated into a long term energy storage solution. Combining the high density energy storage solution of the EESS with traditional battery storage technologies reduces the overall energy storage three dimensional footprint when compared to battery only footprints. This combined EESS/battery long term energy storage provides a solution in providing energy from renewable energy systems when the presence of the wind or sun are not available when compared to traditional battery only storage solutions.