Environmental Information Disclosure (EID) for Electricity Products
Environmental Information Disclosure (EID) is a regulatory framework that requires electricity suppliers to publish transparent, comparable, and reliable data about the environmental performance of the electricity they sell. The aim is to empower consumers, investors, and policymakers with the information needed to make greener choices and to drive market competition toward lowercarbon energy sources.
Why EID Matters
- Consumer empowerment: Clear data enable households and businesses to select products that align with their sustainability goals.
- Market transparency: Standardised information reduces information asymmetry, fostering competition based on environmental quality rather than just price.
- Policy support: Regulators can monitor progress toward national and international climate targets when data are publicly available.
- Investment signalling: Investors use disclosed metrics to assess risk and allocate capital toward lowcarbon generators.
Key Elements of an EID Disclosure
Most jurisdictions require the following core indicators, often presented in a single product sheet that is updated annually:
| Indicator | Description | Typical Unit |
|---|---|---|
| Carbon intensity | Average CO-equivalent emissions per kilowatthour (kWh) of electricity supplied. | gCOe/kWh |
| Renewable share | Proportion of electricity generated from renewable sources (wind, solar, hydro, etc.). | % |
| Generation mix | Breakdown of generation sources (coal, gas, nuclear, renewables, etc.) used to meet the products demand. | % per source |
| Lifecycle GHG emissions | Total greenhousegas emissions accounting for generation, transmission, distribution, and ancillary services. | gCOe/kWh |
| Energy losses | Total electricity lost between generation and enduse, expressed as a percentage of supplied energy. | % |
| Certification & standards | Any thirdparty certifications (e.g., Green Power, RECs, Guarantees of Origin) that the product carries. | List |
How the Data Are Calculated
To ensure comparability, regulators prescribe a methodology based on:
- Systemwide accounting: Use of a national or regional electricity system model that tracks every megawatthour from generation to consumption.
- Temporal resolution: Most EID schemes calculate average values over a calendar year, but some also provide seasonal or monthly breakdowns.
- Allocation rules: When a supplier mixes electricity from multiple sources, emissions are allocated proportionally according to the share of each source in the mix.
- Verification: Independent auditors or designated bodies verify the underlying data and methodology before publication.
Presentation Requirements
Regulations typically require that the product sheet be:
- Machinereadable (e.g., CSV, JSON) for automated comparison tools.
- Humanreadable with clear tables, charts, and explanatory notes.
- Accessible on the suppliers website for at least three years after the reporting year.
- Accompanied by a brief narrative that explains any significant changes, such as a new power purchase agreement or the retirement of a coal plant.
Case Study: GreenChoice Electricity (UK)
GreenChoice, a fictional supplier, publishes the following EID sheet for its Renewable Plus product (2023):
| Metric | Value |
|---|---|
| Carbon intensity | 45 gCOe/kWh |
| Renewable share | 92% |
| Generation mix | Wind 55%, Solar 30%, Hydro 7%, Biomass 0%, Gas 8% |
| Lifecycle GHG emissions | 48 gCOe/kWh |
| Energy losses | 6% |
| Certifications | UK Renewable Energy Guarantees of Origin (REGO) |
The accompanying narrative notes that a new offshore wind farm commissioned in 2022 increased the wind share by 10% and reduced the products carbon intensity by 5gCOe/kWh compared with the 2022 figure.
Benefits for Different Stakeholders
Consumers
By comparing carbon intensity and renewable share, households can select the cleanest option that fits their budget. Many pricecomparison sites now integrate EID data, turning environmental performance into a searchable attribute.
Businesses
Corporate sustainability teams use disclosed metrics to calculate Scope2 emissions for reporting under the Greenhouse Gas Protocol. Some companies set internal targets (nomorethan50gCOe/kWh) that can be met by purchasing specific electricity products.
Investors
Asset managers incorporate EID data into ESG scoring models. A lower carbon intensity often correlates with reduced regulatory risk, making such assets more attractive.
Regulators
Aggregated EID data help monitor progress toward national targets (e.g., EU's 2030 renewable share) and identify gaps where policy interventions may be needed.
Challenges and Future Directions
While EID has advanced transparency, several issues remain:
- Data granularity: Annual averages can mask seasonal peaks of fossil generation.
- Scope of emissions: Inclusion of upstream emissions (e.g., mining of materials for solar panels) varies between jurisdictions.
- Verification costs: Small suppliers may find the auditing burden disproportionate.
- Consumer awareness: Many users still select electricity based on price alone; further education is needed.
Emerging trends aim to address these gaps:
- Realtime dashboards: APIs that deliver hourly carbon intensity to smartmeter apps.
- Extended scope reporting: Incorporating lifecycle assessment (LCA) of generation equipment.
- Standardised digital passports: Blockchainbased certificates that verify renewable claims.
Getting Started with EID as a Supplier
If you are an electricity provider planning to publish an EID product sheet, follow these steps:
- Identify the regulatory framework that applies to your market (e.g., EU Regulation2022/1755, US EPAs Green Power Partnership).
- Collect generation data from all owned, contracted, or purchased sources for the reporting year.
- Apply the prescribed allocation methodology to calculate each indicator.
- Engage an accredited verifier to review the calculations.
- Prepare a humanreadable product sheet and a machinereadable data file.
- Publish the information on your website and notify the regulator, if required.
*The figures and case study presented above are illustrative only and do not represent any real company.*
