A buoyancy vehicle apparatus includes a water or liquid source, such as a water tank, and a buoyant mass in communication with an electrical generator. The buoyant mass is lifted from a lower level to a higher level to store energy. The mass is stored at the predetermined height and released to travel downward when the electricity is needed. After the mass is released and pulled down by gravity, it will drive the generator to produce electricity. The system can store this energy with no loss in power over a long period of time.