A thermo-hydraulic gravitational energy conversion system includes a hydraulic tank hydraulically coupled to a hydraulic pump, the hydraulic pump hydraulically coupled to a check valve, the check valve hydraulically coupled to a first hydraulic valve, the first hydraulic valve hydraulically coupled to a first hydraulic cylinder and to a second hydraulic valve, the first hydraulic cylinder housing a first piston and a first spring, the second hydraulic valve hydraulically coupled to a third hydraulic valve and a fourth hydraulic valve, the third hydraulic valve hydraulically coupled to a second hydraulic cylinder and to a fifth hydraulic valve, the second hydraulic cylinder housing a second piston that supports a weight, the fifth hydraulic valve hydraulically coupled to a heat exchanger, the fourth hydraulic valve hydraulically coupled to a hydraulic motor and to a third hydraulic cylinder, the third hydraulic cylinder housing a third piston and a second spring, the third piston mechanically coupled to a rod, the rod mechanically coupled by a rotational joint to a lever, the lever mechanically coupled to a freewheel, the freewheel mechanically coupled to a shaft.