Regenerative Power Saving Cabinet Solution: Comprehensive Energy-Saving Technology from Elevators to Production Lines

In today’s rapid growth of smart buildings and smart manufacturing, energy efficiency is no longer a “bonus”—it’s a necessity. Beyond HVAC, lighting, and power systems, there is a major category of energy consumption that is often overlooked: dynamic equipment with frequent start–stop cycles, acceleration and deceleration, and bidirectional load movement.

The core value of the regenerative power saving cabinet lies in recovering and reusing the energy that would otherwise be wasted during braking or load changes, effectively elevating the overall energy efficiency of a building or production line. This is not only about reducing electricity costs—it’s a crucial step toward low-carbon operations, ESG goals, and long-term sustainability.

Why Do We Need a Regenerative Power Saving Cabinet?

Many dynamic systems generate substantial regenerative energy during operation. Without proper conversion equipment, this energy is released as heat—wasted and burdening the system with additional thermal load.
A regenerative power saving cabinet captures this kinetic energy, converts it back into electrical energy, and feeds it into the power grid or other equipment, achieving the following benefits:

Real energy savings, with support for energy management and remote monitoring

Reduced continuous heat buildup, lowering brake resistor usage and burnout risk

In short, it transforms equipment that traditionally only consumed energy into intelligent systems that can generate and save energy on their own.

Three Key Values for Buildings and Factories

Immediate and Effective Power Savings

Regenerated energy is directly converted into usable power. For equipment with frequent start–stop cycles and high daily operation, the energy savings are significant.

Visible Power Data

With an optional monitoring module, users can view energy trends, regenerated power, temperature rise, and more—supporting property teams and facility managers in making precise energy management decisions.

Enhanced ESG and Sustainability Performance

The system provides transparent, quantifiable results in energy efficiency and carbon reduction, making it suitable for ESG, CSR, and green building reports.

ACEPILLAR's Power Saving Cabinet – Simplified System Overview

REG2000 – Regenerative Power Unit

Suitable for low-speed / general elevator applications (below 2 m/s)

Average system energy savings above 30% (PM: 35–45%; IM: 20–30%)

Reduces waste heat dissipation

AFE2000 – Active Front End

Bidirectional power flow; regenerative energy can be fed back to the grid with higher efficiency

Low input harmonic distortion (THD < 5%), high power factor, improved overall power quality

Replaces brake resistors, reducing heat loss

▌Case 1: Top 3 Elevator Manufacturer in Taiwan

Site Background: Elevator from 1F to 12F, load capacity 1600 kg, speed 240 m/min. Due to extremely high usage, the building owner wished to reduce energy consumption.
System Integration: Drive – Delta VFD450ED43A, Motor – PM 33.2 kW
Energy-Saving Solution: AFE450A43A + AF-RC450A4
Energy-Saving Rate: h % = 42.2654 / 87.9996 = 48%

▌Case 2: Elevator at a University in Taiwan

Site Background: Elevator from 1F to 9F, load capacity 1000 kg, speed 60 m/min. To support the school’s ESG goals, the owner aimed to achieve energy savings and carbon reduction.
System Integration: Drive – Delta VFD-ED 11 kW, Motor – PM Motor 6.7 kW
Energy-Saving Solution: REG110A43A-21
Energy-Saving Rate: h % = 0.242 kWh / 0.644 kWh = 37% (calculated based on 10 cycles of up/down operation)

Value-Added Software Solution:

Smart Monitoring & Real-Time Alerts

With software integration, the power-saving cabinet not only saves energy but also enhances overall management efficiency.
The system provides a clear data visualization interface, automatically generating Excel reports and trend charts. It supports multi-dimensional data viewing and cross-elevator report integration, enabling managers to quickly understand equipment conditions.

It also features real-time monitoring and alerting functions. Users can set upper and lower power consumption limits, and receive instant notifications via Email, Line, or mobile devices. This empowers managers to detect anomalies remotely, significantly improving operational efficiency and equipment management capabilities.

Beyond Elevators: Broader Energy-Saving Applications

Diverse Applications × Comprehensive Energy Savings

From equipment-level savings to carbon reduction in daily operations

Whether in building elevators or industrial production equipment, regenerative energy recovery is one of the most direct ways to improve energy efficiency.

The regenerative power-saving cabinet helps enterprises achieve multiple goals—energy reduction, carbon reduction, and improved management efficiency—without major equipment replacement. It has become one of the essential technologies for future smart buildings and smart production lines.

Applicable Equipment Types

Large Inertia Loads: centrifuges, industrial washing machines, crushers, gantry-type machine tools, etc.
Four-Quadrant Loads: elevators, oil field pumpjacks, cranes, etc.
Applications Requiring Rapid Braking: machine tools, bag-making machines, automatic storage systems, stamping presses, etc.
Long-Duration Regenerative Energy: printing machinery, escalators, etc.

Power Saving Cabinet Deployment: Implementation S.O.P.

ACEPILLAR brings extensive experience in building-level energy-saving projects. Our professional team provides end-to-end support throughout the deployment of power-saving cabinets—from on-site assessment, space and wiring planning, to installation and integration testing with elevator control panels.
After implementation, our cloud platform enables clients to monitor power usage in real time, ensuring system stability and making energy-saving performance fully visible. This allows building management to be more effortless, efficient, and reliable.