Abstract: The invention relates to a device that generates clean, renewable energy by using gravity. The device generates energy by pumping water in a water well and has a plurality of methods for use. In the case of a single well, the well acts as a battery that stores energy and produces more energy than it stores. The well can store energy in multiple ways, it being possible to store energy during off-peak hours and pump energy during peak hours, benefitting from the cost difference, or to store the excess free energy produced from renewable energy, such as solar energy, wind energy or other types of renewable energy, and pump the energy when same is required. The second use is based on two or more devices of the invention that generate hydroelectrical energy by pumping and storing between the at least two devices, taking turns to charge and produce energy from one well to another. The well can be used in multiple sizes.