① Energy-saving and efficient, improving lift efficiency by 20%-30%. ②Since it is an energy storage type, the regenerative energy does not return to the grid and there are no harmonic problems. ③Installation does not require any modification and can be completed simply and quickly by connecting two wires. ④Suitable for both new and existing elevators. ⑤Suitable for various brands of elevators. ⑥ Compared to batteries, supercapacitors have superior power density and charge-discharge cycle characteristics. ⑦No maintenance required, just clean the cooling fan. ⑧It can improve the energy saving class of the elevator and improve the green building score. ① Energy-saving and efficient, improving lift efficiency by 20%-30%. ②Since it is an energy storage type, the regenerative energy does not return to the grid and there are no harmonic problems. ③Installation does not require any modification and can be completed simply and quickly by connecting two wires. ④Suitable for both new and existing elevators. ⑤Suitable for various brands of elevators. ⑥ Compared to batteries, supercapacitors have superior power density and charge-discharge cycle characteristics. ⑦No maintenance required, just clean the cooling fan. ⑧It can improve the energy saving class of the elevator and improve the green building score. Due to energy shortages and high costs, the energy-saving, recycling and reducing carbon emissions are getting more important. This energy recovery system can improve the elevator efficiency by 20 to 30%, reducing electricity bills and carbon emissions. It's simple and easy to install on new and existed elevator without any modification and is suitable for all brands of elevators. Besides, supercapacitors have superior power density, charge-discharge cycle characteristics and longer life span compared to batteries. In addition, the characteristics of energy storage do not allow the regenerative energy to return to the grid, so there are no harmonic problems, and due to the lower using frequency, the life span of braking resistor chopper and VFD inverter can be extended. Finally, it could improve the energy-saving class of the elevator helping companies access government subsidies when they reach net-zero carbon emissions by 2030.