Sustainability
Energy saving and carbon
reduction
Group Greenhouse Gas Inventory
SZS began voluntary inventories in 2015, expanded to a group-wide greenhouse gas inventory in 2021, and added the Bac Giang plant in Vietnam in 2025, achieving 100% coverage of greenhouse gas emissions. The entire Group has passed third-party verification under the ISO 14064-1:2018 organizational greenhouse gas emission inventory standard.
SZS has developed 5 major strategies comprising 24 action plans, categorized into short-, medium-, and long-term plans based on the Group's current status and business priorities. After consulting with relevant departments, we will establish KPIs, review each initiative on a rolling basis, and adjust as appropriate to actual conditions.
Setting Science Based Targets (Science Based Targets initiative, SBTi)
On our sustainability journey, SZS formally submitted a commitment letter to the Science Based Targets initiative (SBTi) in September 2023. This commitment letter represents our dedication to addressing climate change and establishes our ambition in reducing greenhouse gas emissions.
Energy Use
SZS's energy goals are to reduce energy consumption, improve energy efficiency, and achieve energy savings and emission reductions.
SZS has built its own solar PV systems at the Hukou and Bac Giang plants, with a total capacity of 2 MW and an estimated annual generation of 2 million kWh, at a total investment of NT$81.6 million. The systems were connected to the grid in January 2026 and August 2025 respectively, operating under a self-generation, self-consumption model that integrates renewable energy into daily operations.
Group Electricity Consumption
Internal Energy Consumption and Intensity
| Energy Item | 2023 | 2024 | 2025 | |||||
|---|---|---|---|---|---|---|---|---|
| Taiwan Plants | China Plants | Taiwan Plants | China Plants | Taiwan Plants | China Plants | Vietnam Plants | ||
| Indirect Energy | Purchased Electricity | 154,871.19 | 15,768.00 | 184,013.48 | 21,015.56 | 172,834.67 | 19,592.97 | 1,107.21 |
| Direct Energy | Natural Gas | 43.87 | 0 | 35.74 | 0 | 14.23 | 0 | 0 |
| Liquefied Petroleum Gas | 1,744.31 | 30.20 | 2,434.09 | 34.60 | 2,444.34 | 29.22 | 5.05 | |
| Vehicle Gasoline | 1,077.08 | 253.11 | 995.80 | 224.68 | 937.56 | 41.43 | 0 | |
| Diesel | 179.26 | 730.47 | 236.47 | 642.96 | 275.23 | 0 | 28.4 | |
| Subtotal (Unit: GJ) | 8,567.00 | 3,255.00 | 7,367.00 | 2,701.00 | 176,506.03 | 19,663.62 | 1,140.65 | |
| Internal Energy Intensity (Total Energy Used / Revenue) |
21.72 | 6.21 | 17.18 | 9.12 | 20.31 | 11.15 | ||
Note 1: The unit above is GJ (gigajoules).
Note 2: The statistical scope covers the Taiwan headquarters and overseas subsidiaries.
Note 3: Energy calorific values are cited from the "2015 Energy Statistics Yearbook – Unit Calorific Value Table for Energy Products": electricity 860 kcal/kWh, natural gas 9,000 kcal/m³, liquefied petroleum gas 12,062 kcal/kg, gasoline 7,800 kcal/L, diesel 8,400 kcal/L. 1 kcal equals 4.184 kJ (kilojoules).
Note 4: Renewable energy is currently under development; no renewable energy has been used, and no energy has been sold.
Note 5: Total energy consumption includes heating and cooling consumption.
Note 6: The organization-specific metric (denominator) is per NT$ million of revenue.
Note 7: Internal energy consumption of the organization is used. Total energy consumption includes heating and cooling consumption.
