At larger scales, you are typically limited by the efficiency of whatever is lifting it. A large generator can convert kinetic energy to electric energy with very high efficiency (over 95%).
Also this is very poor energy density each kg moved 1m results in 9.8 joules or ~2.7e-6 kWh. So one metric ton moving 1km would generate 2.7 kWh.
I think that'd be easy to fix though.
This has me wondering how much energy a larger scale application could store and what its efficiency would be.