There are two legitimate ways to buy electricity for a Mexican industrial operation: through CFE Basic Supply or through a private Qualified Supplier in the Wholesale Electricity Market (MEM). Public conversation tends to polarize —"CFE is more expensive but safe," "private is cheaper but risky"— and the simplification hides what matters: each option fits a different company profile.
This article is a point-by-point comparison, without commercial bias, so you can decide on the merits which structure suits your operation. The right answer for a continuous 8 MW manufacturer is not the same as for an industrial park with scattered loads or for an operation with a low load factor.
The 2 supply options in Mexico
CFE Basic Supply is the regulated supplier of last resort. It serves any user who does not qualify as UC and any user who qualifies but chooses not to migrate. Price is set by a regulated tariff that the CRE adjusts periodically based on system costs and tariff policy. There is no negotiable contract, no exclusivity terms, no financial guarantees, no exit clauses.
Qualified Supplier (SuCal) is a private participant authorized by the CRE to buy energy in the MEM and resell it to Qualified Users under bilateral contracts. Price is negotiated, the contract runs 2 to 5 years, and the conditions (indexation, firm/spot mix, exit, guarantees) are subject to negotiation.
Structurally: one is a tariff, the other is a contract. That difference explains nearly everything that follows.
Cost structure compared
| Component | CFE Basic Supply | Qualified Supplier |
|---|---|---|
| Energy (kWh) | Regulated tariff with peak/intermediate/base hours | Negotiated price, frequently lower; firm + spot mix |
| Demand (kW) | Regulated charge per peak demand | Negotiated capacity charge, usually lower |
| Power factor | Fixed penalty if below 0.90 | Negotiable; some suppliers waive if compensated on-site |
| Clean Energy Certificates (CELs) | No allocation to user | Allocated based on contracted renewable mix |
| Transmission & Distribution (T&D) | Included in tariff | Regulated pass-through (independent of supplier) |
| Taxes | Standard | Standard |
The total billed price in MEM tends to be lower for industries with high load factor (above 50%). For more detail on how that difference is calculated, read How much do you really save as a Qualified User?.
Coverage, reliability and SLA
There's a common myth here: "if I switch to a private supplier, I lose grid backup." False. The national electric network is still operated by CFE Transmisión and CFE Distribución, and CENACE coordinates the system —regardless of who bills you for energy—.
- Network quality, blackouts, transmission interruptions, and reliability do not change between Basic Supply and a MEM contract.
- Backup service in case of supplier default is guaranteed via the supplier of last resort figure (CFE).
- Commercial SLAs —response times, information quality, dispute handling— do vary and are typically better with private suppliers serving mature industrial portfolios.
Switching supplier does not affect technical reliability. It affects how energy is contracted and billed.
Risks associated with each option
CFE Basic Supply risks:
- Full exposure to future tariff adjustments with no ability to lock in price
- No CEL access; obligation to fulfill CELs via secondary market if applicable
- No contract negotiation: you take the tariff as it comes
- Demand and power-factor charges with non-negotiable penalties
Qualified Supplier (MEM) risks:
- Spot price volatility if the contract leaves uncovered exposure
- Risk of supplier contractual default (financial collapse, operational issues)
- Required financial guarantees (letter of credit, bond, deposit)
- Take-or-pay clauses if your operation contracts
- Early-termination penalty in some contracts
Neither scheme is risk-free. What changes is the nature of the risk: tariff and regulatory under CFE, contractual and financial under SuCal.
Typical contractual terms
| Element | CFE Basic Supply | Qualified Supplier |
|---|---|---|
| Document | Tariff adhesion contract | Negotiated bilateral contract |
| Duration | Indefinite, no commitment | Typically 2 to 5 years |
| Price negotiation | No | Yes |
| Indexation | Defined by CRE | Negotiable (gas, USD, CPI) |
| Take-or-pay clauses | No | Frequently yes |
| Exit clauses | Not applicable | Negotiable, with penalty |
| Financial guarantees | Not required from user | Yes |
| Reports and telemetry | CFE standard | Bilateral commitment, frequently richer |
The asymmetry is clear: CFE is operational flexibility with rigid price; SuCal is operational commitment with negotiated price.
Which option fits which company
This is the matrix rarely shown:
CFE Basic Supply fits when:
- Your demand is below 1 MW (you don't qualify)
- Load factor below 35% (intermittent operation)
- Operation horizon shorter than 24 months at the site
- No internal team to manage energy contracts
- Need for maximum operational flexibility without volume commitments
Qualified Supplier in MEM fits when:
- Contracted demand above 1 MW per load point
- Load factor above 50%
- Continuity horizon of 3+ years at the site
- Willingness and capacity to manage contract and guarantees
- Active pursuit of lower electricity cost or improved renewable mix
- Need for cost visibility over 24–60 months for financial planning
Final comparison table
| Dimension | CFE Basic Supply | Qualified Supplier MEM |
|---|---|---|
| Access | Any user | Only Qualified Users (≥1 MW) |
| Price | Regulated tariff | Negotiated |
| Typical savings vs CFE base | Base | 15–30% gross |
| Commitment | No binding contract | 2–5 year contract |
| Financial guarantees | No | Yes |
| CEL access | No | Yes |
| Technical reliability | Same | Same |
| Cost visibility | Low (subject to adjustments) | High (24–60 months) |
| Suitable for low load factor | Yes | No |
| Suitable for high load factor | Suboptimal | Yes |
3 common myths about each option
Myth 1: "Private is always cheaper." Not always. An operation with a 30% load factor and consumption concentrated in peak hours can pay more under a poorly structured MEM contract than under optimized CFE.
Myth 2: "Migrating to the MEM means cutting ties with CFE." No. You remain connected to the CFE Transmisión and Distribución network. Only who bills you for energy changes.
Myth 3: "If I sign with a SuCal and they go bankrupt, I'm without power." No. The supplier-of-last-resort figure exists and there are transfer protocols coordinated by the CRE. The user does not lose power; they are reassigned.
How to decide on the merits
The decision is made with three data points: your last 12 months of bills, your verified real load factor, and your operational horizon at the site. Without those three data points, any "comparison" is marketing.
To understand the full picture of the regime, review the Complete Guide to Qualified Users. To avoid the most common problems when migrating, read 10 common mistakes when registering as a Qualified User.
How Enerlogix helps you compare
At Enerlogix Solutions we model both scenarios with your operation's real data. Plan 360 Management includes in its diagnostic phase an explicit comparison of optimized CFE Basic Supply vs MEM with 3 real Qualified Supplier quotes, over 24 and 36 months.
For an honest comparison of your case, request a free evaluation or learn about our energy procurement service. We work with your actual bill, not generic scenarios.
