The Mexican government published three new provisions for storage systems, cogeneration, and guidelines for the migration of legacy permits, published on April 16 in the Official Gazette of the Federation.
The regulatory package not only redefines technical rules but also establishes the operational and economic foundations under which new technologies will be integrated into the national electricity system. Specifically, the instruments set mandatory conditions for the participation of energy storage, delimit generation capacity based on industrial needs, and regulate the transition from legacy contracts to the new electricity framework.
In parallel, this regulatory redefinition aligns with a new phase of expansion for the sector. The government is preparing a new call for renewable energy generation projects after having already awarded 3.3 GW of clean capacity along with 1.2 GW of storage , while also projecting the development of an additional 2,000 MW of battery storage systems , representing an unprecedented scale for the country.
One of the central focuses is the regulation of Electrical Energy Storage Systems (EESS), which for the first time have a specific regulatory framework that defines their integration, operation and services within the electrical system.
The provisions establish that these systems may participate both in association with power plants and independently, and even be integrated into transmission and distribution networks, significantly expanding their business models.
Likewise, the services that can be provided are determined, including backup, regulation and support for the reliability of the system, under schemes coordinated by the operator.
The goal is for storage to contribute directly to the quality, continuity, security, and efficiency of the national electricity system , consolidating it as a strategic, not complementary, asset.
It is worth remembering that the government anticipated a specific call for stand-alone storage, separating its development from that of generation for the first time , which enables new opportunities for investors specializing in batteries.
The new framework not only defines the integration of storage but also introduces technical and economic conditions that directly impact the bankability of projects. Industry experts warn that these provisions require a review of key assumptions in financial models, particularly regarding revenue, system sizing, and operation.
One of the most relevant points is the minimum three-hour duration threshold for a storage system to participate in certain market schemes. This means that projects designed below this standard could be excluded from anticipated revenue streams, directly impacting their economic viability.
In turn, the new rules establish that the capacity intended to compensate for the variability of the power plants must remain available throughout the validity of the permit , and is subject to the operating instructions of the system.
In practice, this means that a portion of the storage ceases to be fully marketable, as it is primarily committed to the reliability of the electrical system.
Another critical aspect is the handling of battery degradation, which becomes a risk explicitly assumed by the developer. If the system's capacity falls below required levels and the operator determines that this affects reliability, the permit holder must replace or upgrade the infrastructure.
This introduces a contingent obligation, but with a direct impact on the long-term technical and financial design.
Furthermore, the new framework introduces an element of short-term regulatory uncertainty. The system operator has 90 days to define the variability analysis methodology that will establish the minimum sizing of storage systems. This means that projects currently under development may require adjustments once this criterion is published, affecting their technical configuration.
Taken together, these elements reflect a paradigm shift: storage is no longer a flexible add-on but a regulated component with strict technical requirements and a central role in system operation. For developers, this means greater operational predictability, but also greater demands on project design and structuring.
In parallel, the permit migration scheme reinforces the role of the Federal Electricity Commission as the central organizing force of the market , by establishing modalities where the state-owned company acquires a relevant part or all of the energy generated.
This redefines the marketing conditions for existing projects seeking continuity under the new framework.
Finally, although with less prominence in the package, the provisions on cogeneration introduce adjustments aimed at improving the efficiency of the system , by more strictly linking the electricity generation capacity with the thermal demand of industrial processes, limiting over-installation and optimizing the use of fuels.
In this context of regulatory redefinition, the sector will have a key forum for discussion on May 19 at the Future Energy Summit (FES) Mexico , where the participation of 500 executives from the public and private sectors is expected. The event is shaping up to be a strategic meeting point to analyze new calls for proposals, regulatory challenges, and investment opportunities emerging from this new framework for renewables and energy storage.