Projects & Applications

Renalfa IPP repowers Kaolinovo PV park, adds 110 MWh battery storage system

The repowered site is now a hybrid renewable park with 3.3 times more solar, and a larger 60 MW output capacity to support the Bulgarian grid.

By

Tristan Rayner

Oct 21, 2025

Renalfa IPP has completed the repowering of its Kaolinovo solar park in northeast Bulgaria, refreshing the site’s capacity to a 60 MW from the solar PV, while adding a 33 MW / 110 MWh battery energy storage system (BESS).

Originally commissioned in 2012 with 10 MW, the Kaolinovo facility now features an upgraded 33 MW solar array alongside the co-located storage system. The project was managed and built by Solarpro Bulgaria, which served as EPC contractor.

Vienna-based Renalfa IPP is a joint venture between Renalfa Solarpro Group and French fund manager RGREEN INVEST. The company is active as a renewable energy investor in Central and Eastern Europe, operating in Bulgaria, Hungary, Romania, and North Macedonia, and only a week ago switched on a 260 MWh BESS.

According to Renalfa IPP, its current portfolio includes 554 MW of operational generating assets and 455 MW / 1,008 MWh of implemented storage capacity. A further 1 GW of projects is under construction, with another 1 GW in late-stage development.

Written by

Tristan Rayner

Tristan is an Electrical Engineer with experience in consulting and public sector works in plant procurement. He has previously been Managing Editor and Founding Editor of tech and other publications in Australia.

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