Latin America's AI data center expansion is colliding with grid infrastructure constraints, forcing utilities to prioritize capacity allocation.

As Latin America races to capture a bigger share of the global data center and AI investment wave, a new whitepaper from Finnish power technology group Wärtsilä reinforces that the region's biggest obstacle is not capital or demand. It is the power grid itself.

The report, "Beyond the Grid: Building the Power System for AI in the Americas," warns that interconnection queues, transmission congestion and permitting delays could turn today's "speed to power" race into "speed to powerless," where projects secure approvals but never reach operation.

While the analysis spans the US, Brazil, Mexico and Chile, it points to distinct—and in some cases urgent—dynamics playing out across Latin America's fastest-growing markets, including Argentina.

**Brazil: Transmission can't keep pace with contracts**

Brazil's constraint is delivery capacity to the corridors where data centers are clustering, not overall energy availability, the report argues. Just three months after Brazil's national grid planners published their 2026-2030 energy operation plan, projected data center load on the transmission grid for 2030 was revised upward by 60%, from 18.9 TWh to 30.3 TWh per year, as signed grid-connection contracts jumped from 8 to 22.

Yet, because reinforcement decisions depend on centrally planned auction cycles rather than a single developer's timeline, delivery to hotspots such as the São Paulo–Campinas–Rio corridor may lag by years even as national energy balances remain ample.

Speaking to BNamericas about the report, Jorge Bezerra, Wärtsilä's market development manager, said access to energy infrastructure is the central bottleneck for data centers across the Americas, and that in Brazil specifically the constraint lies more in transmission and distribution than in generation itself. Electricity demand has historically grown "vegetatively," tracking GDP growth of roughly 2%-5% a year. But now data centers are introducing a much steeper, less predictable demand curve that power systems worldwide are not built to absorb.

Sustainability policy adds another layer of uncertainty. The proposed ReData tax regime (Bill 278/2026), which would suspend certain federal taxes for qualifying data center operators, requires 100% clean or renewable electricity and a strict water-use threshold of 0.05 liters per kilowatt-hour. The bill remains under Senate review, with the eligibility of natural gas and even biofuels, such as sugarcane-derived ethanol, still undefined—a gap the report says will shape technology choices for years to come.

Even once ReData is finalized, Bezerra added, it would not resolve a core mismatch: a data center can be built in about two years, while expanding transmission infrastructure in Brazil typically takes five to seven years. For developers, he said, timing often matters as much as cost—sometimes more.

Bezerra also flagged a related, so far little-discussed question: whether output from on-site, behind-the-meter generation built to supply a data center would also count toward that 0.05 liter/kWh limit under the Water Usage Effectiveness methodology used to define the calculation's boundary. In his view, regulators are unlikely to fold co-located generation into that boundary, since doing so could make the threshold unworkable depending on the technology chosen.

To close the timing gap, Bezerra pointed to co-located generation, which can take two forms: fully off-grid, dedicated solely to the data center, or grid-connected, supplying either part of the load for reliability or serving as the primary source with the grid as backup. The two are not mutually exclusive, he said. A project can start off-grid and later evolve to sell surplus capacity into the market via bilateral contracts once connected, without the on-site assets losing value.

He distinguished this from conventional backup gensets, typically diesel-fired: co-located generation must serve the data center's load around the clock, while backup systems are sized for brief, contingency-driven use and are neither efficient nor reliable enough to run continuously at base load.

On fuel flexibility, Bezerra noted that Wärtsilä's engines can already run on natural gas, diesel and a range of biofuels, and that the company is beginning to test ethanol-fired operations. This, he said, is a relevant capability given that ReData's definition of "clean or renewable" remains open. Whatever that definition ends up being, he said, Wärtsilä believes it is positioned to meet demand. Yet, if only solar, wind and hydro ultimately qualify, system reliability could suffer, requiring additional firm capacity to be procured and its cost shared among consumers through capacity auctions, he said.

**Mexico: Self-consumption and water stress shape the model**

In Mexico, according to the paper, the core mismatch is similar to Brazil's: speed. Data centers can be built in roughly two years, while transmission, substation and thermal generation projects typically take longer. Mexico's grid situation is even more complex, and investments and time spent in expanding transmission and distribution networks, as well as in building substations, tend to be greater than in Brazil.

The Electricity Sector Law, promulgated in March 2025, preserves a pathway for dedicated on-site, self-consumption generation that the report describes as increasingly central to how projects get built. Competitively priced US pipeline gas flowing into the Bajío region strengthens the economics of that model.

Water is another defining constraint. In hubs such as Querétaro, aquifer stress is narrowing the range of viable generation technologies, favoring low-water-footprint, self-consumption architectures, according to Wärtsilä. The report notes that reciprocating engines, which use closed-loop water systems with negligible process-water consumption, hold a structural advantage over gas turbines that rely on evaporative or mist cooling in warm, high-altitude conditions typical of central Mexico.

**Chile: A grid-connected market nearing saturation**

Chile's data centers remain predominantly grid-connected, but the report flags corridor-level saturation as a growing risk. In Santiago's Lampa–Quilicura corridor, home to much of the country's hyperscaler buildout, transmission capacity is approaching its limits, requiring urgent network reinforcement to support new connections, says the paper.

Also, developers there are more dependent on system-level upgrades and firm supply than on an established path for on-site primary generation. According to Wärtsilä, Chile's push toward a highly renewable system—including a decarbonization plan that continues to retire coal while treating natural gas as a transition fuel—has to be balanced against system resilience concerns sharpened by the national blackout of February 2025, which the report cites as a reminder of the risks facing critical 24/7 infrastructure on a constrained grid.

**Argentina: Resources are abundant, certainty is not**

Argentina stands out in the report as a market where the constraint is not resource availability but speed to power and long-term investment certainty. The country combines strong Patagonian wind resources, abundant low-cost gas from Vaca Muerta, a cold climate that reduces cooling loads, and ample affordable land. The set represents an attractive profile reinforced by the Large Investment Incentive Regime (RIGI), which grants qualifying projects thirty years of tax, customs and foreign-exchange stability, alongside a proposed enhanced "Súper RIGI" regime targeting data centers and AI infrastructure.