In response to the Ministry of Economic Affairs’ target of achieving 20% self-generated renewable energy by 2025 and the Paris Agreement’s goal of limiting temperature rise, the Taiwan region has been purchasing green electricity to replace grey electricity since 2024. In 2025, the Taiwan region purchased 297,493 kWh of green electricity for the full year (including 152 renewable energy certificates), with renewable energy consumption of 1,070.97 GJ, accounting for 11.60% of the Taiwan region’s total electricity consumption. The U.S. region purchased 200 renewable energy certificates (200 MWh), accounting for 4.45% of the U.S. region’s total electricity consumption. Additionally, a 100 kW solar power generation system was installed at the Shanghai office, which commenced operations in 2024, with electricity generated primarily for self-use. In 2025, a total of 115,840 kWh was generated for self-use, with renewable energy consumption of 417.02 GJ, accounting for 7.68% of the China region’s total electricity consumption. Overall renewable energy consumption in 2025 was 2,208.00 GJ, accounting for 2.15% of the Group’s total energy consumption. Calculated based on floor area (732,110 m²), the 2025 energy intensity (0.1401 GJ/m²) increased by 60.85% compared to 2024 (0.0871 GJ/m²), primarily because Future Electronics sites were only included for eight months of energy consumption data in 2024, resulting in a lower base period, and the Group’s floor area decreased slightly in 2025. The Group’s data coverage rate was 100%.
The Group’s total energy consumption in 2025 was 102,535.69 GJ, comprising purchased electricity of 25,163,054 kWh (90,587.00 GJ, accounting for 88.71% of total energy consumption), Shanghai solar self-generated electricity of 115,840 kWh (417.02 GJ), automotive gasoline of 25,955.18 liters (847.46 GJ), and natural gas of 319,046.13 cubic meters (10,684.22 GJ).
The Group continues to implement the monthly EV charging subsidy for employees in Taiwan, encouraging the transition from traditional fuel vehicles to EVs to effectively reduce GHG emissions. Going forward, the scale of green energy generation and green electricity procurement will continue to be expanded, while capital expenditure plans for expanding solar power generation facilities and replacing energy-saving equipment will continue to be evaluated. The net-zero transition investment and procurement amount is expected to increase to approximately US$60,000 by 2035.
Note: Energy calorific value conversion factors uniformly adopt the energy product unit calorific value table from the Bureau of Energy, Ministry of Economic Affairs’ Energy Statistics Annual Report: 1 liter of automotive gasoline = 7,800 kcal, 1 cubic meter of natural gas = 8,000 kcal (based on the GHG emission factors announced by the Ministry of Environment on February 5, 2024), 1 kcal = 4,186 joules, purchased electricity converted at 1 kWh = 0.0036 GJ.
2021 2022 2023 2024 2025 720.3913 771.4068 1,022.2115 931.3838 11,531.6742 7,447.7736 15,501.9962 18,393.3181 66,333.9178 91,004.0183 8,168.1649 16,273.4628 19,415.5296 67,365.3016 102,535.6925 WT manages energy primarily through data digitization and equipment management, among other approaches, to control energy use efficiency. By monitoring energy consumption patterns and analyzing load characteristics, existing facilities and equipment undergo annual regular maintenance and servicing, with aging equipment replaced to reduce energy consumption. In 2025,
WT’s primary energy source was non-renewable electricity purchased from power companies. In addition to electricity, the organization’s internal energy consumption also includes gasoline and diesel. Going forward, energy conservation-related education and training will be planned starting from the Taiwan headquarters and subsequently extended to overseas operating sites, working together with employees and stakeholders to reduce energy consumption.
Historical total energy consumption and intensity
Note 1: Please refer to section “5-5 GHG Inventory and Assurance Status” for organizational boundaries.
Note 2: Electricity data is sourced from the billing records of purchased electricity at each site. Gasoline and diesel data is sourced from CPC Corporation’s EBCS financial operations platform or fuel purchase receipts.
Note 3: Electricity conversion factor: 1 kWh of purchased electricity = 0.0036 GJ.
Note 4: Energy conversion coefficients for various fuels are based on the Energy Products Calorific Value Table from the Energy Statistics Annual Report by the Ministry of Economic Affairs’ Energy Administration: 1 liter of gasoline = 7,800 kcal / 1 liter of diesel = 8,400 kcal
Note 5: 1 kcal = 4,186 joules.
Note 6: The denominator used for intensity is floor area; please refer to Note 6 under GHG emission intensity.
Note 7: The denominator for data coverage rate is the floor area of the Group’s operating sites for each year; the numerator is the floor area of operating sites included in the inventory for each year.
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