According to the Board's decision dated April 16, 2026 numbered 14482, 1300 megawatts of the total capacity of 1500 megawatts (MW) of hydroelectric power plants and 100 megawatts each of biomass and geothermal power plants reported by Turkish Electricity Transmission Inc. (TEİAŞ) were allocated.
Applications for HEPPs are sorted by low capacity factor.
According to the decision, the facilities eligible for multi-source power generation conversion applications must be partially or fully functional power plants.
For applications for hydroelectric power plants, the average capacity factor is calculated taking into account the production data of the last 5 years and the installed performance data of the systems.
Applications will be ranked based on the power plant with the lowest capacity factor and capacity will be allocated until the announced total allocation capacity is reached.
For power plants that have been in operation for less than 5 years, the calculation is based on the current operating period. If there are capacities that were put into operation at different times in the last 5 years, a separate calculation is made for each capacity.
For hydroelectric power plants, capacity can be allocated for systems with a total installed capacity of 5 megawatts of electricity (MWe) and below up to the installed capacity in operation.
The capacity that can be allocated for hydropower plants above 5 MWe is determined by adding 25 percent of the installed capacity above 5 MWe to the said 5 MWe.
The allocable output of a hydroelectric power plant is limited to a maximum of 20 megawatts.
If the capacity previously acquired for the power plant applied for is above the specified limits, the application will be returned. If it is below the established limits, the remaining capacity will be allocated by TEİAŞ.
YEKDEM requirement in biomass and geothermal energy
According to the decision, biomass and geothermal power plants that can be used in applications to convert to multi-source power generation plants must have completed the Renewable Energy Resources Support Mechanism (YEKDEM) period.
For each biomass and geothermal power plant used, the average capacity factor is calculated based on the production and installed performance data from the last 5 years.
Applications are ranked based on the power plant with the highest capacity factor and capacity is allocated until the announced total allocation capacities are reached.
If there are capacities that were put into operation at different times in the last 5 years, a separate calculation is made for each capacity, taking into account the operating period and the installed capacity.
For biomass and geothermal power plants, only the installed capacity can be allocated during operation for systems with a total electrical output of 3 MWe and less.
For systems over 3 MWe, the capacity to be allocated is determined by adding 25 percent of the installed capacity over 3 MWe to the said 3 MWe.
The allocated output of a biomass and geothermal power plant is limited to a maximum of 10 megawatts.
If the capacity previously acquired for the power plant applied for is above the specified limits, the application will be returned. If it is below the established limits, the remaining capacity will be allocated by TEİAŞ.
Applications will be accepted until June 30th
As part of the decision, it was announced that applications for capacity allocation will be received by June 30, 2026.
It was also noted that existing, pending applications will be evaluated alongside new applications.
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