The Dominican Republic 's Superintendency of Electricity (SIE) has opened a public consultation on a regulation that could strengthen the business case for battery storage systems in the country. The proposal recognizes Battery Energy Storage Systems (BESS) as providers of voltage and reactive power regulation services, enabling a new revenue stream for a technology that recently won 325 MW in a key tender for the sector.
The initiative comes at a strategic time for the Dominican market. As the large-scale integration of BESS (Bus and Services Energy Services) progresses, developers and investors are seeking mechanisms to diversify revenue streams beyond energy arbitrage or power purchase agreements. In this context, the possibility of participating in ancillary services adds a component that could improve the profitability of awarded projects and increase their attractiveness for future investments.
The regulation under consultation establishes the technical, operational, and economic conditions for providing voltage and reactive power regulation services within the National Interconnected Electric System (SENI). Among its most relevant aspects, it formally incorporates battery systems as authorized resources for providing voltage support, a function increasingly in demand in networks with high renewable energy penetration.
The regulatory discussion comes a few months after the awarding of 325 MW of renewables with BESS , a process that confirmed the market's interest in this technology, but also left questions on the table about the mechanisms that will allow monetizing all the flexibility attributes that batteries offer.
Until now, much of the projected revenue for these assets has focused on shifting energy between different time slots, reducing operational constraints, and supporting renewable energy integration. The SIE's proposal broadens this scope by incorporating a specific scheme for providing ancillary services, including mechanisms for reactive energy valuation, zonal settlements, and performance-related penalties.
Beyond the projects already awarded, the measure also sends signals to those considering entering the Dominican market. The ability to contribute to grid stability is becoming a competitive advantage and could influence the design of future renewable energy plants and storage systems.
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A system that demands more flexibility
The regulatory progress coincides with a period of transformation for the National Interconnected System (SENI). The sustained addition of solar and wind farms has increased the need for resources capable of responding quickly to operational variations and absorbing generation surpluses.
The curtailment episodes recorded in different parts of the country accelerated the discussion about the role batteries should play in the Dominican energy transition. In addition to storing energy, these systems can contribute to frequency stability, voltage support, and contingency management—attributes that are becoming increasingly valuable as renewable energy shares grow.
The importance of these services was also highlighted by recent events that affected the operation of the National Interconnected System (SENI). The power outages recorded in recent months, including the blackout caused by a failure at Punta Catalina, reopened the debate about the resilience of the grid and the need to strengthen the tools available to respond to large-scale disruptions.
While voltage regulation is not an isolated solution for these types of events, it is part of a set of measures aimed at improving the dynamic behavior of the system and supporting an increasingly complex electrical matrix.
Therefore, the outcome of this public consultation will be closely followed by the entire sector. The main challenge will be defining economic indicators that adequately compensate the services provided and enable the mobilization of new investments. If the scheme achieves this balance, the Dominican Republic will not only have opened a new business opportunity for energy efficiency and service providers (ESSPs), but will also have taken another step toward building a more flexible electricity system, better prepared for renewable energy expansion.
