Why is electricity most of a Penang semiconductor assembly plant's footprint, and how is it reported?
Back end assembly and test run clean rooms, chillers, compressed air and testers around the clock, so grid electricity usually dwarfs fuel. Report location based Scope 2 with Peninsular Malaysia's grid factor and market based with any green tariff or certificates you hold, then split per unit for customers.
Where the kWh go
- Clean room air handling and chillers.
- Compressed air and nitrogen generation.
- Test and burn in equipment.
- Wire bonding, moulding and plating lines.
Two figures
Location based: grid kWh x the Peninsular factor. Market based: subtract kWh covered by a green tariff or retired certificates in your name, at zero.
Per unit
Customers ask per device or per wafer equivalent. Split by test hours or line hours, not just units, when packages differ.
What Senseible does here
Senseible reads electricity bills into a dated, fingerprinted record per plant; for sites outside India the grid factor is entered from the official source and labelled.
Sources: GHG Protocol Scope 2 Guidance, IEA, electricity and emissions data by country, GHG Protocol Corporate Standard
Last reviewed 2026-10-21.