Energy and Greenhouse Gases Management
Greenhouse Gas Inventory
WNC has referenced ISO 14064-1: 2018 and the GHG Protocol to set organizational boundaries according to operational control laws. We established 2022 as the base year to calculate our greenhouse gas emissions and for verification purposes. In 2023, the company formulated goals superior to those initiated by the Financial Supervisory Commission in 2022 in the TWSE Listed and TPEx Listed Companies Sustainable Development Roadmap. In 2024, greenhouse gas inventory operations and verification for all 16 sites was completed.
WNC's Scope 1 and Scope 2 GHG Emissions in the Most Recent Four Years Note
(Unit：tonnes CO2e)
- Note: Emission Intensity = Metric Tons of CO2e per NT$ Million in Consolidated Revenue.
WNC has conducted a comprehensive inventory of Scope 3 GHG emissions. In 2024, the total Scope 3 emissions amounted to 5,542,207.75 tonnes CO2e, with an emission intensity of 48.90 tonnes CO2e per NT$ million. This marks a significant decrease in comparison to the emission intensity of 51.63 tonnes CO2e per NT$ million in 2023. Furthermore, regarding the emissions hotspot of purchased goods and services, we utilize the supplier management platform and material carbon footprint database developed by us to strengthen our carbon management within the value chain and achieve our net-zero goal.
Scope 3 Emissions in the Most Recent Four Years Note
(Unit：tonnes CO2e)
- Note: Scope 3 emissions coverage expanded from selected categories in 2021–2022 to all categories in 2023, excluding the Mexico plant and Austin subsidiary. 2023 data for Categories 1 and 11 were extrapolated to align with the SBTi-approved reduction pathway (approved Feb 2025).
Energy Management
Energy Management System
To efficiently manage energy consumption and enhance energy efficiency, WNC has established an WNC Energy Management Policy and implemented energy management systems. We have set the baseline or base year based on historical data from each site, regularly tracked energy reduction performance, and continued improving energy efficiency by setting energy-saving goals and adopting related measures. Currently, the ISO 50001 energy management system has been adopted at all sites.
The energy used ( or non-renewable energy used ) by WNC consists of electricity and fossil fuels, including diesel, gasoline, and natural gas. In 2024, the total non-renewable energy consumption Note 1 amounted to 470,243 GJ, with electricity accounting for over 98%, or 463,538 GJ, it’s global non-renewable energy consumption data coverage rate Note2 is 88.98%. The company also uses a small amount of fossil fuels, primarily for emergency power generating, heating, company vehicles and employee cafeterias.
WNC's Fossil Fuel Usage for the Most Recent Four Years
(Unit: kWh / NT$ million revenue)
WNC's Electricity Usage for the Most Recent Four Years
(Unit: kWh / NT$ million revenue)
- Note 1: In 2024, the scope of power consumption calculations covers WNC headquarters, Taipei office, S1, S3, WNC (Kunshan), Wistron NeWeb (Kunshan), WebCom Communication (Kunshan), WebCom Communication - Nanjing Branch, Vietnam plant, and WNC subsidiaries in the US, the UK. Subsidiaries in Germany and Japan adopt a work-from-home model and are therefore not included in the calculation. The Mexico site was also excluded because the data does not cover a complete year.
- Note 2: The electricity statistics for non-renewable energy are compiled based on the utility billing cycle of each site.
- Note 3: According to the Heat Content of Energy Products table and the Abbreviation & Equivalents of Energy Units table in the Energy Statistics Handbook 2022 published by the Bureau of Energy, one liter of diesel oil generates 9.7692 kWh or 0.0351 GJ of power, one cubic meter of natural gas generates 10.4670 kWh or 0.0377 GJ of power, and one liter of gasoline generates 9.0714 kWh or 0.0326 GJ of power.
- Note 5: The non-renewable electricity data for each site is based on the billing period indicated on the electricity bill.
- Note 6: 1,000 kilowatt-hours（ kWh ）= 1 megawatt-hour（ MWh ）
Highlighted Energy-saving Project 1: Installation of Energy Management Platform and Related Modules Development and Application
The S3 Plant was completed and put into operation in 2023, planned as a smart factory area, aiming to enhance the efficiency of energy data collection and optimize energy allocation through comprehensive infrastructure construction. The plant has installed multiple circuit meters, with over 100 meters installed, and has set up an energy management platform along with the development of related modules and applications. These include not only plant facilities but also major production equipment. Currently, the main applications focus on energy-saving measure management and tracking of abnormal power consumption, effectively reducing unnecessary energy losses.
In addition, by establishing a power tree and comprehensive infrastructure, the S3 Site can accurately collect real-time electricity usage data from facility affair systems, each floor and primary production lines. Currently, the energy-saving measures and abnormal electricity usage tracking systems adopted for air conditioning and manufacturing have resulted in significant results, effectively reducing unnecessary energy losses. The following two cases illustrate the positive impact brought by the implementation of the energy management platform.
- The primary source of power consumption at the S3 site is the chiller system. By establishing performance indicators for the chillers on the energy management platform, equipment managers can schedule maintenance and optimize the operation of the chiller system using these direct efficiency metrics, ensuring the chiller system operates at high efficiency with low energy consumption.
- In 2024, the S3 site proposed 31 energy-saving projects, which are expected to save 3,905,684 kWh of power, 23.4 times higher than the energy-saving goal of the year. Through the energy management platform, these projects can be effectively managed. With the real-time alert system on the platform, personnel can take corrective actions when anomalies occur, ensuring the sustained and smooth operation of each project.
Highlighted Energy-saving Project 2: Green Building Label for New Sites
When the S3 plant was planned and constructed in 2019, the core concepts of the company's sustainable development were the initial consideration. It was designed following the standards of Taiwan’s green building certification, taking into account four major aspects: ecology, energy conservation, waste reduction, and health. Based on these, strict standards were developed according to nine major indicators for evaluation, aiming to create a building with minimal consumption of resources, minimal waste generation, and ecological, energy conservation, and health characteristics. In 2021, it received the Candidate Green Building Certificate (Bronze Level). In June 2024, the site obtained the green building certificate following an on-site investigation, becoming WNC’s first green factory.
The buildings built during phase two construction at WNC’s Vietnam site were designed in accordance with the LEED rating system, emphasizing environmental diversity, green transportation, sustainable sites, water efficiency and energy and atmosphere management. The company has installed water-efficient equipment, smart water meters, and water reuse systems as well as additional solar panels at the Vietnam site. This brings the site’s solar power generation capacity to 5,475 kW, producing around 5 million kWh of power annually, and the ratio of renewable energy use to total electricity consumption at the site is expected to exceed 4%. Measures such as upgrades to HVAC systems and building exteriors have also improved energy usage efficiency. In 2024, the site was awarded LEED Gold certification by the U.S. Green Building Council, with nearly perfect marks in the water efficiency and energy and atmosphere categories.
Renewable Energy Transition
To enhance climate resilience, WNC became a member of RE100 initiatives in 2023, pledging to achieve 50% renewable energy usage across all sites by 2030 and 100% usage by 2040. To achieve these goals, the company installs solar panels to generate power for self-use, purchases international renewable energy certificates (I-REC), and implements energy saving measures to increase renewable energy use.
In recent years, WNC has continued to install additional rooftop solar panels at its primary production sites worldwide. In 2022, a plan to install additional solar panels at the Kunshan site and new solar panels at the Vietnam site was realized, and these panels have begun generating power. In 2023, our new S3 plant commenced usage of solar panels and the Vietnam site completed its solar panel expansion. In 2024, both the S1 and Vietnam site also completed their solar panel installations and started generating power for self-use.
To date, WNC’s solar farms have a total installed capacity of 10.51 MW and have generated a total of 5,039,892 kWh of electricity. In addition, WNC has also purchased I-REC. The ratio of renewable energy use to total electricity consumption at WNC was 21.06% in 2024, meeting the goal for the year.