A system, comprising: - a wind power system, comprising: - a wind tower configured to store liquid in an interior volume of the wind tower; and - a wind turbine supported by the wind tower and configured to generate a first power output from wind; and - a pumped liquid energy storage system, comprising: - a reservoir configured to collect liquid flowing from the interior volume of the wind tower; - a turbine generator disposed between the wind tower and the reservoir and configured to generate a second power output using the liquid flowing from the wind tower to the reservoir; and - a pump configured to pump the liquid from the reservoir to the interior volume of the wind tower, wherein the interior volume is defined by at least one tower section of a plurality of tower sections (30, 100, 102) of the wind tower, said at least one tower section is configured to contain the liquid, said at least one tower section comprises an inner surface exposed to the interior volume, and an exterior surface exposed to environment surrounding the wind tower, and each tower section of the plurality of tower sections (30, 100, 102) comprises a frusto-conical shape from a first axial end to a second axial end of the respective tower section, characterized in that the interior volume comprises a liquid storage portion configured to store the liquid, a lower dry section below the liquid storage portion, and an upper dry section above the liquid storage portion, wherein the lower dry section extends from a foundation of the wind tower to the liquid storage portion of the wind tower, and the lower dry section comprises a height of at least approximately 15 meters. - a wind power system, comprising: - a wind tower configured to store liquid in an interior volume of the wind tower; and - a wind turbine supported by the wind tower and configured to generate a first power output from wind; and - a pumped liquid energy storage system, comprising: - a reservoir configured to collect liquid flowing from the interior volume of the wind tower; - a turbine generator disposed between the wind tower and the reservoir and configured to generate a second power output using the liquid flowing from the wind tower to the reservoir; and - a pump configured to pump the liquid from the reservoir to the interior volume of the wind tower, - a wind tower configured to store liquid in an interior volume of the wind tower; and - a wind turbine supported by the wind tower and configured to generate a first power output from wind; and - a pumped liquid energy storage system, comprising: - a reservoir configured to collect liquid flowing from the interior volume of the wind tower; - a turbine generator disposed between the wind tower and the reservoir and configured to generate a second power output using the liquid flowing from the wind tower to the reservoir; and - a pump configured to pump the liquid from the reservoir to the interior volume of the wind tower, - a reservoir configured to collect liquid flowing from the interior volume of the wind tower; - a turbine generator disposed between the wind tower and the reservoir and configured to generate a second power output using the liquid flowing from the wind tower to the reservoir; and - a pump configured to pump the liquid from the reservoir to the interior volume of the wind tower, wherein the interior volume is defined by at least one tower section of a plurality of tower sections (30, 100, 102) of the wind tower, said at least one tower section is configured to contain the liquid, said at least one tower section comprises an inner surface exposed to the interior volume, and an exterior surface exposed to environment surrounding the wind tower, and each tower section of the plurality of tower sections (30, 100, 102) comprises a frusto-conical shape from a first axial end to a second axial end of the respective tower section, characterized in that the interior volume comprises a liquid storage portion configured to store the liquid, a lower dry section below the liquid storage portion, and an upper dry section above the liquid storage portion, wherein the lower dry section extends from a foundation of the wind tower to the liquid storage portion of the wind tower, and the lower dry section comprises a height of at least approximately 15 meters.