No, the energy density is poor. Gravitational potential energy depends on mass and height (mass * gravitational acceleration * height = energy in joules). If y

No, the energy density is poor. Gravitational potential energy depends on mass and height (mass * gravitational acceleration * height = energy in joules). If your whole house went up and down 10 meters it would store just a handful of kWh, maybe 1 to 10 depending on the mass of your house.