In 2026, a Mexican industrial company can no longer ignore three acronyms that appear more and more in conversations with customers, banks, and regulators: CELs, RECs and ESG. They are not the same thing, they are not bought in the same markets, and they serve different purposes. But together they define the sustainability posture your company projects outward — and increasingly, that posture translates into pesos: better access to credit, contracts with European OEMs that demand Net Zero, avoidance of carbon tariffs.
This guide explains what each one is, which obligations apply to your company today, what is coming in 2026–2027, and how to build an integrated strategy without falling into greenwashing.
The 3 acronyms explained in one page
CELs · Clean Energy Certificates (Mexican market)
These are certificates issued by the CRE that prove 1 MWh was generated with clean energy (renewable, nuclear, efficient cogeneration). The regime has been in force since 2017.
Who is required to buy them:
- Basic Service Suppliers (CFE Basic Supply)
- Qualified Suppliers
- Market-Participant Qualified Users
- Generators that signed legacy contracts
How many you need: SENER sets an annual percentage of total consumption. In 2026 the obligation is 13.9%. This means that if your company consumes 10,000 MWh/year, you must acquire 1,390 CELs (1,390 MWh of certified clean generation).
How much they cost: the market price fluctuates. In 2026 it ranges between MX$80 and MX$220 per CEL.
Penalty for non-compliance: the CRE fines between MX$300 and MX$700 for each missing CEL.
RECs · Renewable Energy Certificates (international market)
These are international certificates (primarily from the I-REC system) that prove renewable energy generation. They are not mandatory in Mexico, but they are increasingly required by the international value chain.
When they matter:
- Your company exports to Europe, the U.S., or Asia and customers demand sustainability reports
- You are a supplier to a global OEM (automotive, electronics) with corporate Net Zero targets
- You need to report Scope 2 under the GHG Protocol with a zero or reduced emission factor
- You are seeking renewable attributes specific by technology (solar vs wind vs hydro)
Typical 2026 price: USD $1.50 – $5.00 per REC in the I-REC market. Significantly less than CELs per unit.
Key difference from CELs: RECs are additional and voluntary. They do not exempt you from buying CELs if you are a Qualified User.
ESG · Environmental, Social, Governance
It is a corporate sustainability reporting framework covering 3 dimensions: environmental, social, and governance. It is not mandatory in Mexico for most companies, but it is required by:
- Banks when evaluating corporate credit (Sustainable Finance)
- Global OEMs to keep their suppliers
- Institutional investors
- European regulators (CBAM) for importers
Most-used standards in 2026:
- GHG Protocol (Greenhouse Gas) — the most common for emissions inventory
- ISSB (International Sustainability Standards Board) — the emerging global standard, required for companies exporting to Europe since 2026
- GRI (Global Reporting Initiative) — for broad sustainability reporting
- TCFD (Task Force on Climate-related Financial Disclosures) — specific to climate risk
The energy component within ESG
The energy your company consumes enters the ESG report through two paths:
Scope 1 · Direct emissions
Fuels your plant burns directly: natural gas, diesel, fuel oil. Measured in tonnes of CO₂ equivalent (tCO₂e) per year, calculated with standard emission factors.
Scope 2 · Emissions from purchased electricity
The electricity your plant consumes has an emission factor associated with its source. When you buy electricity from CFE Basic Supply, the emission factor is the average of the Mexican mix (high in gas, hydro, and limited renewables). If you buy energy with CELs or via a certified renewable PPA, you can report a lower or zero emission factor for that portion of your consumption.
That is why many exporting companies migrate to the MEM as Qualified Users: it lets them contract packages with additional CELs or direct renewable PPAs, significantly lowering their reported Scope 2.
Scope 3 · Value-chain emissions
Emissions from suppliers, transport, product use, end of life. It is the most complex scope and the one global OEMs increasingly require from their tier-1 and tier-2 suppliers. If you want to see how each category is classified using SEN factors, read Scope 1, 2 and 3 GHG: your plant's emissions.
What obligations do you have today?
If you are a Qualified User of the MEM
- Mandatory purchase of CELs at 13.9% of your annual consumption (2026)
- Annual compliance report to the CRE
- Penalty if you do not comply
If you exceed the national emissions threshold
- If your direct and indirect emissions add up to 25,000 tCO₂e or more per year, you must report to SEMARNAT's National Emissions Registry. It is a legal obligation, not a commercial one: see RENE SEMARNAT: mandatory GHG reports.
If you export to the European Union
- As of 2026, the Carbon Border Adjustment Mechanism (CBAM) applies additional charges on steel, cement, aluminum, fertilizers, hydrogen, and electricity exported to the EU.
- You need a validated emissions inventory for your exported product.
- See the detail in European CBAM 2026: impact on Mexican exporters.
If you are a supplier to a global automotive OEM
- Tier-0 OEMs (Toyota, GM, Stellantis, Volkswagen, Mercedes) have corporate Net Zero targets with deadlines between 2030 and 2050.
- They increasingly require their tier-1 suppliers to report Scope 1, 2, and 3 aligned with SBTi (Science Based Targets initiative).
- Tier-2 and tier-3 plants are also beginning to receive ESG information requests.
If you supply an automaker, the ESG audit for automotive OEM suppliers details what platforms like EcoVadis and CDP review and how to prepare to pass.
If you are seeking sustainable financing
- Banks like BBVA, Banorte, and Santander offer preferential rates for loans linked to ESG performance (Sustainability-Linked Loans).
- Access to green funds from NAFIN, Banobras, and international development banks.
How much does it cost to comply with everything?
| Item | Approximate annual cost (MXN, 2–5 MW plant) |
|---|---|
| CELs (consumption 10,000 MWh/year, mid price) | $200,000 – $300,000 |
| Additional RECs for voluntary targets | $50,000 – $200,000 |
| GHG Protocol emissions inventory | $150,000 – $400,000 |
| ESG / ISSB report (first year) | $300,000 – $1,200,000 |
| ESG / ISSB report (subsequent years) | $100,000 – $400,000 |
| External validation (third-party verification) | $80,000 – $250,000 |
| First-year total | $780,000 – $2,400,000 |
| Recurring total | $580,000 – $1,300,000 |
The costs sound high but the alternative — losing an OEM contract, paying full CBAM, not accessing green rates — is frequently more expensive.
Integrated strategies vs loose pieces
The most common trap: each area of the company handles its own fragment — ESG is run by sustainability, CELs by the electricity-procurement area, the CBAM report by exports. Result: triple effort, inconsistent data, duplicated costs.
An effective integrated strategy connects the three elements:
- Migrating to the MEM as a Qualified User gives you direct control of the energy source and of the associated CELs
- Contracting with a Qualified Supplier that offers a certified renewable package lowers your Scope 2 and gives you CELs covering the obligation + voluntary attribute
- Using the same electricity-consumption dataset for CELs (CRE), Scope 2 (GHG Protocol), CBAM report (EU), and ESG report (OEM customer)
This avoids the triple effort and lowers the total cost by between 25% and 40% compared to handling each item separately.
The ROI: owned renewable portfolio vs CELs only
The recurring question: is it worth investing in your own renewable generation (rooftop solar, on-site PPA, wind) or just buying CELs/RECs?
It depends. We cover it in detail in owned renewable portfolio vs buying CELs, where we compare payback and Scope 2 reduction route by route, but the practical rule:
- CELs/RECs only: if your goal is to meet the regulatory + customer minimum, without significantly reducing your electricity rate. Low cost, high simplicity.
- Renewable PPA + CELs: if you want to reduce Scope 2 to 30–60% AND lower your electricity rate simultaneously. Moderate investment, ROI in 5–10 years.
- Owned on-site generation: if you have available land and a long operating horizon. High investment, maximum predictability of cost and emissions.
How emissions are reported to OEMs and to CBAM
OEMs typically require:
- Standardized platforms: CDP (Carbon Disclosure Project), EcoVadis, Sedex
- Scope 1 and 2 data with GHG Protocol methodology
- A reduction roadmap aligned with SBTi
- Increasingly: relevant Scope 3 data for the product you sell
CBAM has its own reporting platform managed by the European Commission. It is more technical and requires specific validation of the exported product, not of the company in aggregate.
Common mistakes that invalidate the report
- Double counting of renewable attributes: using the same MWh for a CEL and a REC and for a bilateral PPA
- Reporting Scope 2 with the wrong emission factor (mixing the national average with the supplier's specific factor)
- Lacking documentary evidence of the renewable electricity contracted
- Inconsistent consumption data between the ESG report and the internal inventory
- Lack of external validation when the customer or regulator requires it
Do you need an integrated ESG strategy?
At Enerlogix we integrate the energy dimension of ESG within the 360 Management Plan and our sustainable services: we contract the CELs, optimize Scope 2 with renewable packages via a Qualified Supplier, prepare the GHG Protocol inventory, and connect the data with your reports to CBAM, OEMs, and banks.
If your company faces:
- ESG demands from a global customer that you do not know how to meet
- The need to report to CBAM in 2026
- A CEL obligation as a Qualified User that you are resolving reactively
- A search for sustainable financing
Request a free evaluation of the 360 Management Plan. We review your current situation and deliver an integrated roadmap with no obligation.
For more detail, read European CBAM 2026: impact on Mexican exporters.
Frequently asked questions
CELs are certificates issued by the CRE that prove 1 MWh was generated with clean energy in Mexico; they are mandatory for Qualified Users and other market participants. RECs are international certificates, mainly from the I-REC system, that prove renewable energy: they are not mandatory in Mexico, they are voluntary and additional, and they are increasingly required by the export value chain.
SENER sets an annual percentage of total consumption and in 2026 the obligation is 13.9%. If your company consumes 10,000 MWh per year, you must acquire 1,390 CELs. The market price ranges between 80 and 220 MXN per CEL in 2026. If you do not comply, the CRE fines between 300 and 700 MXN for each missing CEL.
For a 2-to-5 MW plant, the first year runs from 780,000 to 2.4 million MXN: it includes CELs, voluntary RECs, GHG Protocol inventory, an ESG or ISSB report, and external verification. The recurring cost drops to a range of 580,000 to 1.3 million per year. An integrated strategy reduces the total cost by between 25% and 40% versus handling each component separately.
Electricity from CFE Basic Supply carries the average emission factor of the Mexican mix. By migrating to the MEM as a Qualified User you can contract packages with additional CELs or direct renewable PPAs via a Qualified Supplier, which lets you report a lower or zero emission factor for that portion of consumption and significantly lower your Scope 2.
The most common are double counting of renewable attributes, using the same MWh for a CEL, a REC, and a bilateral PPA; reporting Scope 2 with the wrong emission factor by mixing the national average with the supplier's factor; lacking documentary evidence of the renewable energy contracted; inconsistent consumption data between the ESG report and the internal inventory; and lack of external validation when the customer or regulator requires it.
