SIE 600 MW tender: solar and wind with storage
Santo Domingo, Dominican Republic. – The Superintendency of Electricity (SIE) approved Resolution SIE-092-2025-LCE, which sets the technical and regulatory basis for a new national public tender to add up to 600 megawatts (MW) of solar and wind generation capacity.
Under the resolution, the awarded energy will be contracted long-term by the distribution companies, with payments in U.S. dollars backed by the end-user tariff. This structure offers investors greater certainty regarding revenue streams.
Details of the 2025 SIE Public Tender
The call is aimed at renewable generation projects with individual capacities between 20 and 300 MW. All resulting contracts will be for firm supply, with availability commitments subject to oversight by the regulator.
An innovative element is the requirement to include Battery Energy Storage Systems (BESS) with a minimum four-hour autonomy, interconnected at the same point as each plant. These systems must comply with the technical guidelines of the Coordinator of the National Interconnected Electrical System (SENI), including frequency regulation, synthetic inertia support, and black-start capability.
Expected Impact on the Power Sector
This 600 MW SIE tender is a key step in the country’s energy transition. By making storage mandatory, it ensures greater grid stability and a more efficient integration of renewable energy.
According to preliminary estimates, the new projects could reduce dependence on fossil fuels and deliver significant savings in operating costs for the national power system. In addition, given the long-term contracts denominated in U.S. dollars, investors will benefit from greater certainty and financial attractiveness.
Benefits for Investors
The tender offers competitive conditions for solar and wind developers. Long-term power purchase agreements (PPAs) backed by the distribution companies enable stable revenue projections, while the regulatory framework defined by the SIE provides legal certainty.
Local and international companies that participate will have the opportunity to tap into a growing market, with additional incentives driven by the inclusion of energy storage—a trend that is gaining traction across the region.
How It Affects End Users
The addition of 600 MW of renewable generation with mandatory storage will directly benefit users. In the medium term, improved supply reliability, fewer outages, and a gradual reduction in generation costs are expected—eventually reflected in electricity tariffs.
At the same time, the shift toward clean energy strengthens the Dominican Republic’s environmental commitments and responds to growing social demand for a more sustainable energy matrix.
Comparison with Previous Tenders
In past processes, renewable energy tenders did not require storage. This created challenges for SENI’s stability, especially during peak demand hours. The SIE’s new public tender sets a regional precedent by making batteries a mandatory requirement, aligning with international practices in countries such as Chile and Spain.
This change positions the country at the forefront of energy regulation in the Caribbean, ensuring that projects contribute not only renewable energy but also flexibility and reliability to the system.
Process and Next Steps
The Unified Council of the Distribution Companies (CUED) will be responsible for conducting the process, publishing the bid documents, and evaluating the offers. Once contracts are awarded, the distribution companies will formalize the long-term PPAs.
Interested parties can find more details at the Superintendency of Electricity (SIE) and access the official tender document.
At Pellerano & Herrera, we have the experience to support you at every stage of the tender process, ensuring regulatory compliance and protecting your interests in renewable energy projects.