Environmental Sustainability｜Energy Management

  • Environmental Sustainability
  • Energy Management

Energy Management

Nuvoton actively reduce the environmental impact of our business operations by investing in innovative technologies and initiating layouts for renewable energy and net carbon zero emissions. We enhance resource use efficiency and implement waste management to respond to the continuously evolving international environmental regulations, extreme climate events, and other risks. By estimating financial impacts and planning management costs in advance, we formulate environmental strategies and build operational resilience for the company.

SDGS
SDG 7 Affordable and Clean Energy
SDG 13 Climate Action

48.8

％

Approved SBTi Near-Term Target: Commitment to Reduce Scope 1 and 2 Emissions by 2030 Compared to the 2022 Baseline

25

%

Approved SBTi Near-Term Target: Commitment to Reduce Scope 3 Emissions by 2030 Compared to the 2023 Baseline

1163000

kWh

Nuvoton Taiwan's Annual Electricity Saving Achievement in 2024

Greenhouse Gas Emission
Energy Management
Water Management
Waste Management
Air Pollution Control
Key Chemical Raw Materials Management

Energy Management Policy

To ensure the promotion of energy management and energy-saving projects, Nuvoton has implemented the ISO 50001 energy management system and established an energy conservation and carbon reduction working group under the Sustainable Development Committee. This working group is composed of the facilities department and related units. In addition to holding regular energy management meetings to review the current status and project progress, they also share project results and experiences with overseas plants, continuously achieving energy-saving goals.

Energy Management

Electricity is the main source of energy consumption for Nuvoton. In 2024, renewable energy accounted for 1.36% of all energy types, and purchased electricity accounted for 95.24%1 in Nuvoton Taiwan. To this end, Nuvoton has implemented the P-D-C-A (Plan-Do-Check-Action) mechanism, aiming to enhance energy use efficiency and increase the proportion of renewable energy usage. Various energy-saving and carbon-reduction projects have been actively launched, and the energy management system has been implemented. Additionally, Nuvoton has initiated a digital transformation plan, introducing smart manufacturing systems to optimize energy digital integration; and continues to support the procurement of energy-efficient products, optimizing equipment performance, striving to achieve energy-saving goals.

Energy-saving measures were undertaken in four main areas
  • Install green energy equipment: Establish a solar power system, expected to generate 880,000 kWh/year.
  • Establish an energy management system: Obtain ISO 50001 certification.
  • System supply load optimization: Optimize HPA supply pressure (8.4→7.8 kgf/cm²), saving 182,000 kWh/year.
  • Prioritize energy-saving equipment when replacing old equipment.
In 2023, Nuvoton Taiwan advanced its energy-saving and carbon reduction initiatives by setting up solar renewable energy systems, achieving the installation of 8% of the contracted renewable energy capacity within the same year (with an installed capacity of 819 kW, generating 1 million kWh annually). In 2024, Nuvoton Taiwan’s total energy consumption decreased by 1.88% compared to the baseline year of 2021. Nuvoton Taiwan adopted the ISO 50001 Energy Management System in 2022 and achieved certification in 2023. In 2024, Nuvoton Japan's energy consumption decreased by 30% compared to the baseline year of 2021. Nuvoton Japan adopted the ISO 50001 Energy Management System in 2024 to achieve visualized management of energy use and improve employees' awareness of energy efficiency through company-wide efforts. In the same year, Nuvoton Japan procured solar power through a power purchase agreement, planning to supply electricity to the Arai plant starting from October 2025.

Nuvoton Internal Energy Consumption and Energy Intensity Items by Region (2021-2024)

 

Nuvoton 2023 Energy Saving Results 3

Nuvoton TaiwanElectricity Saving (kWh/year)Energy Saving (GJ/year)
Solar Power Installation880,0003,168
Update High Vacuum Unit 1 to Variable Frequency Machine87,600315
Optimize HPA Supply Pressure (8.4 → 7.8 kgf/cm²)182,500657
Replace Scrubber Fan with Energy-Saving Motor10,00036
Replace P5000, Lam Units with Energy-Saving Pumps12 Units112,500405
Replace LP-P with 2 Energy-Saving Pumps30,000108
Change Hsinchu Plant Sign Projector Lights and Landscape Lights to LED1,9067
LED Change Explosion-Proof Lights to LED25,00090
Total1,329,5064,786
3The scope of the investigation includes Nuvoton Taiwan and Japan. Energy savings are calculated at 3,600 joules per kilowatt-hour.
Nuvoton Japan (Including Nagaokakyo, Uozu, Arai Plants)Electricity Saving (kWh/year)Energy Saving (GJ/year)
  • Nagaokakyo, Uozu: Use LED Lighting
  • Arai: Equip North and South Chilled Water Secondary Pumps in C Building with High-Efficiency Motors, Stop Existing Heat Source Building Absorption Chillers, Cease Operation of Existing Heat Source Building Absorption Chillers, Switch to LED Lighting, Use Air Conditioning Timers in Facility Offices
1,953,0527,031

Electricity Saving Amount and Proportion Over the Past Three Years 4

Nuvoton Taiwan

Nuvoton Japan

Nuvoton TaiwanUnit2022 2023 2024 
Total Internal Energy ConsumptionGJ260,259258,670256,485
Electricity Saving AmountGJ3,1154,7894,223
 Reduction Proportion%0.391.821.62
Nuvoton JapanUnit2022 2023 2024 
Total Internal Energy ConsumptionGJ1,318,4191,098,307975,730
Electricity Saving AmountGJ45,911266,023388,599
 Reduction Proportion%31928
4 The survey scope covers Nuvoton Taiwan and Nuvoton Japan. Annual electricity saving rate = annual electricity saving amount / (annual electricity saving amount + annual electricity consumption) * 100%

Nuvoton's Energy-Saving Future Goals and Planned Corresponding Actions

 Mid-Term Target (2025)Long-Term Target (2030)
Strategy and ContentNuvoton TaiwanNuvoton JapanNuvoton TaiwanNuvoton Japan
Use of Renewable EnergyInstalled capacity of Tainan building rooftop after evaluation in 2025: 200kWp (capable of generating 200,000 kWh/year)Purchase solar powerRenewable energy accounts for 1.5% of total electricity consumption at Taiwan sitesPurchase solar power
Improve Energy Use EfficiencyAchieve a cumulative energybaseline rate of 5% compared to the baseline year (2021)Average annual energy and resource usage intensity decreases by 1% compared to the previous yearAchieve a cumulative energybaseline rate of 10% compared to the baseline year (2021)From 2025 onwards, the average annual energy and resource usage intensity will be reduced by 1% compared to the previous year over the next 5 years.