Renalfa IPP and Eurowind open Bulgaria's Tenevo park: 242 MWp of solar, 772.5 MWh of batteries
Serguey Asael Shinder2 min readRenalfa IPP and the Danish developer Eurowind have inaugurated the Tenevo hybrid renewable energy complex in Tundzha Municipality in south-eastern Bulgaria, Energy-Storage.news reported. The companies announced commercial operation on 30 September.
What is there. A 242 MWp solar array and co-located battery storage with a total of 311 MW and 772.5 MWh. The solar plant was commissioned in the first quarter of 2026, by which time the first battery, 65 MW / 260 MWh, was already running. Two more phases followed, 144 MW / 300 MWh and 102 MW / 212.5 MWh. The companies also plan to add 250 MW of wind at the site but gave no timeline.
Who owns it. Tenevo Solar Technologies, a special-purpose company owned by Eurowind and by Renalfa IPP, which is itself a joint venture of Austria's Renalfa Solarpro Group and the French investment manager RGreen Invest. The partners described the project as part of a strategy to get the most value out of the grid connections they already have by hybridising them. Renalfa Solarpro founder Ivo Prokopiev called Tenevo the first dispatchable renewable asset of that scale in Europe.
The country around it. Bulgaria had about 5.4 GW of battery storage operating at the start of September, equal to 22.8% of its installed power capacity, the highest share of any country, according to the article. California, by comparison, has about 16 GW, or 14.9% of its capacity, and China about 150 GW, or 3.7%. Research by the think tank Ember found that Bulgaria installed enough batteries in 2025 to shift 77% of its newly installed daytime solar capacity, slightly ahead of Chile at 76%. The growth came despite political turmoil and was supported in part by EU Recovery and Resilience funding.
What it means
Tenevo shows the pattern behind Bulgaria's numbers: the scarce asset is the grid connection, and batteries are added behind it in stages until the solar output can be moved into the evening. Projects built that way compete in the same evening hours, so the more of them there are, the smaller the price spread each new battery can earn.