# Renewable energy and storage expansion in Southeast Europe

> Live situation record from CLSTR: https://clstr.news/situations/renewable-energy-and-storage-expansion-in-southeast-europe
> Updated: 2026-10-21T21:00:08.000Z. Sources: 12. Developments: 2.

Renewable energy development in Southeast Europe is advancing through large-scale hybrid projects and strategic regional investments. In Bulgaria, Renalfa IPP and Eurowind Energy have inaugurated the enlarged Tenevo hybrid renewable energy complex in southeastern Bulgaria. The facility, operated by Tenevo Solar Technologies, combines a 242 MW peak capacity photovoltaic plant with two co-located battery energy storage systems (BESS) totaling 311 MW and 773 MWh. The project is expected to generate approximately 332 GWh of clean electricity annually, with future plans to add more than 250 MW of wind power. Total investment for all phases of the Tenevo complex is projected to exceed EUR 500 million. Financing for the solar component included EUR 50 million from the EBRD and EUR 53 million from Raiffeisen Bank International AG, with an additional EUR 60 million expected for the second phase of the battery storage system. This project is among the first in Bulgaria to utilize a guarantee under the EU’s InvestEU programme.

Concurrently, DEI and Metlen are accelerating their joint energy storage strategy as part of an 11.8 billion euro investment program through 2030. The partnership targets a regional portfolio of up to 1,500 MW of battery capacity and 3,000 MWh of storage across Romania, Bulgaria, and Italy. The first phase is expected to deliver 300-500 MW of battery projects by the first quarter of 2027. This expansion supports a broader goal to add 1.5 to 2 GW of renewable capacity annually in Greece and Eastern Europe, focusing on solar, wind, and flexible production to ensure grid stability.

## Claims

- The first battery projects in Bulgaria and Romania will be completed by the first quarter of 2027. (corroborated by 5 sources)
- The joint venture aims for a total portfolio of 1,500 MW and 3,000 MWh of storage capacity. (corroborated by 5 sources)
- The partnership involves a 50/50 split in capital and revenue between DEH and Metlen. (corroborated by 5 sources)
- The initial phase of battery projects will have a capacity of 300-500 MW. (corroborated by 4 sources)
- Metlen is responsible for the development and construction of the infrastructure. (corroborated by 4 sources)
- DEH is responsible for the commercial management of the batteries. (corroborated by 4 sources)
- DEH plans to invest approximately 11.8 billion euros through 2030. (corroborated by 2 sources)
- DEH aims to add 1.5 to 2 GW of new renewable energy capacity annually until 2030. (corroborated by 2 sources)

## Timeline

### 2026-10-21: DEI and Metlen expand energy storage footprint in Southeast Europe

DEI and Metlen aim to deploy 1,500 MW of energy storage in Southeast Europe by 2027, part of a larger €11.8 billion regional renewable energy and grid stability investment plan.

10 sources. https://clstr.news/cluster/ppc-and-metlen-expand-renewable-energy-footprint-in-southeast-europe

### 2026-10-01: Renalfa IPP and Eurowind Energy launch hybrid power plant in Bulgaria

Renalfa IPP and Eurowind Energy have launched the Tenevo hybrid renewable energy complex in Bulgaria, featuring 242 MW of solar power and 311 MW of battery storage.

2 sources. https://clstr.news/cluster/renalfa-ipp-and-eurowind-energy-launch-hybrid-power-plant-in-bulgaria

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Cite as: Renewable energy and storage expansion in Southeast Europe. CLSTR, https://clstr.news/situations/renewable-energy-and-storage-expansion-in-southeast-europe