To respond to the challenges of global energy shortages and climate change, we consolidate energy-saving proposals from all units to set relevant targets and action plans each year and periodically monitors and controls performance. Additionally, we promote production machinery assessments to drive energy efficiency improvements in plant facilities. Based on our energy-saving plan submitted to the Bureau of Energy, Ministry of Economic Affairs, the average energy-saving rate approved for our Taiwan Plant was 1.37%~2.84% in 2025. In line with the government’s promotion of renewable energy, we increased the installed capacity of solar panels at our Taiwan plant in 2020, reaching a cumulative capacity of 233 kWp by 2025, generating 364,301 kWh.
Note1: Conversions are based on the “Heat Content of Energy Products” of the Ministry of Economic Affairs. Starting from 2024, the unit conversion for diesel and gasoline will be calculated based on the calorific values announced by the Ministry of Environment.
Note2: Renewable energy refers to solar energy, which is estimated annually based on the daily generation in GJ of the installed capacity.
Note3: The 2023 data includes all consolidated entities, while data for other years covers only Taiwan Plant, China Plant and Malaysia Plant.
Note4: In March 2025, the SHS plant in China began implementing a solar photovoltaic system for self-generation and self-consumption.
In 2025, total electricity consumption reached 90,523,754 kWh (90,524 MWh), with an electricity intensity of 6.741. The primary sources of electricity consumption were process power and air conditioning systems. In 2025, the company’s overall operations and production activities continued to grow, resulting in a total electricity consumption increase of approximately 2.7% compared to 2024. However, the electricity intensity per unit decreased by approximately 8.3%, indicating an improvement in energy efficiency compared to the previous year. Moving forward, we will continue to focus on planning and implementing initiatives related to energy efficiency, as well as the selection and adoption of renewable and alternative energy sources.
To effectively lower energy consumption and GHG emissions, we actively promote various energy-saving measures. The focus is on improving the energy efficiency of plant facilities and production equipment, optimizing operational efficiency by adjusting production equipment parameters, and replacing traditional lighting with energy-efficient alternatives. We aim to achieve our environmental and energy-saving goals through initiatives across its plants. Additionally, we raise energy-saving awareness by encouraging employees to turn off lights when not in use and shut down computers after work. We also promote the widespread use of energy-efficient lighting and installs motion-sensor switches in areas with intermittent lighting needs to reduce energy waste by changing daily habits.
To fulfill our social responsibility, we voluntarily conduct an annual self-assessment and disclosure of our GHG emissions. To meet our own targets, we adopted ISO14064-1:2018 for our 2022 GHG inventory of Taiwan plant as a demonstration. GHG data were consolidated using the operational control approach and verified by a third-party assurance agency. In 2023, all subsidiaries completed the external assurance of their GHG inventories, and we have completed the external assurance of the Group’s GHG inventory. We adopted external inventory under ISO14064-1:2018 for the first time at our Taiwan plant in 2022, while other sites implemented it in 2023.
The Taiwan plants first introduced ISO 14064-1:2018 external verification in 2022, while the remaining plants introduced ISO 14064-1:2018 external verification for the first time in 2023. In 2025, in compliance with regulatory policies, the principles for calculation and classification of the greenhouse gas inventory were shifted to adhere to the GHG Protocol (Greenhouse Gas Protocol), adopting the financial control approach to conduct a group-wide (including overseas subsidiaries) greenhouse gas inventory to align with the IFRS Sustainability Disclosure Standards. Emission factors are sourced based on the principle of adhering to local regional applicability, such as: Taiwan plants calculate greenhouse gas emissions with reference to the "Greenhouse Gas Emission Factors" announced by Taiwan's Ministry of Environment on February 5, 2024, the electricity carbon emission factors published by the Energy Administration of Taiwan's Ministry of Economic Affairs, and the Ministry of Environment's "Product Carbon Footprint Calculation Platform"; China plants reference the " General rules for calculation of the comprehensive energy consumption " and the "2022 National Electricity Carbon Emission Factor" published by China's Ministry of Ecology and Environment; Malaysia references the Malaysia Energy Statistics Handbook 2023 published by Suruhanjaya Tenaga (Energy Commission) of Malaysia and grid emission factors published by IEA (2025) to calculate greenhouse gas emissions; Singapore references grid emission factors published by IEA (2025) to calculate greenhouse gas emissions. The Global Warming Potential (GWP) adopts the IPCC Assessment Report IPCC AR6 WGI (2021), updated by Errata (2025-10-07). The seven inventoried greenhouse gases are CO2, CH4, N2O, HFCs, PFCs, SF6, and NF3, with zero group-wide greenhouse gas emissions originating from perfluorinated compounds.
The primary source of greenhouse gas emissions for the CWTC Group comes from Scope 2 – purchased electricity. Therefore, we further analyzed the sources of electricity consumption within the Group’s facilities, which are mainly used for production processes. Other sources include air conditioning systems, air compressors equipment, wastewater treatment systems, lighting, and other equipment. We are committed to reducing energy consumption and improving energy efficiency in order to minimize greenhouse gas emissions generated during the production process. For related energy-saving measures, please refer to Section 3.3 Energy Management – Energy Conservation and Power Saving Plan.
The production processes of CWTC Group include electroplating, which generates air pollutants such as acidic and alkaline gases, as well as volatile organic compounds (VOCs). In response to these emissions, we strictly comply with environmental regulations applicable to the locations of each plant. We also regularly commission third-party organizations to conduct sampling and monitoring to ensure that exhaust concentrations meet regulatory emission standards. Taking the Taiwan plant as an example, in addition to complying with the Ministry of Environment’s Air Pollution Control Act by appointing dedicated air pollution control personnel and deputies, and providing relevant training, the plant also uses wet scrubbers. Acidic and alkaline gases, along with VOCs, are collected from emission ducts and directed into scrubbers for neutralization and treatment before discharge. Relevant data is recorded and monitored daily to ensure emission control performance aligns with regulatory requirements. In 2025, the total VOC emissions from the Taiwan plant amounted to 6.8 metric tonsNote. All production facilities within the Group met regulatory emission standards, with no major air pollution violations reported. Beyond process-related emission controls, the Taiwan plant is also promoting behavioral change among employees. This includes offering incentives and subsidies for switching to electric scooters, encouraging the adoption of low-carbon transportation options to reduce emissions and pollution from commuting — demonstrating our commitment to fulfilling environmental responsibilities.
Note: Calculated using the mass balance method.