Pernik (Bulgaria)
Case Study: Pernik – From Industrial Decay to Renewable Transformation
Overview
The Pernik project stands as a landmark example of SUNOTEC’s ability to merge technological innovation with sustainable land use. Situated in Pernik, Bulgaria, the project transformed the former slag landfill of Stomana Pernik, once one of the country’s largest steel plants, into a renewable energy hub. The site had long symbolised industrial decline, marked by soil contamination, illegal dumping, and environmental degradation.
Through SUNOTEC’s integrated approach, this brownfield area was rehabilitated and repurposed into a centre for clean energy generation. The project now hosts seven photovoltaic (PV) installations, five of which feature integrated battery energy storage systems (BESS). By turning a contaminated industrial zone into a productive solar park, SUNOTEC demonstrated how responsible engineering and sustainability principles can drive both ecological recovery and renewable energy expansion.
Client
Solaris Holding
Key Numbers
0 ha
Site Size0 MWp
Installed Solar Capacity0 MWp
Installed BESS Capacity0
Modules Installed
Key Challenges
Before SUNOTEC’s involvement, the site posed severe environmental and logistical difficulties. The ground was contaminated by decades of industrial waste, while illegal dumping had further degraded the landscape. The area lacked adequate drainage and soil stability, posing significant risks of erosion and waterlogging. Additionally, the challenge was not only environmental but also regulatory—aligning rehabilitation work with EU and Bulgarian brownfield utilisation standards while ensuring the site met strict environmental compliance requirements.
How SUNOTEC Overcame Those Challenges
SUNOTEC implemented a comprehensive remediation and development plan to restore and repurpose the land. Hundreds of cubic meters of polluted soil were relocated, and illegal waste deposits were safely removed. New stormwater and runoff management systems were installed to stabilise the ground and prevent future erosion. Throughout the process, SUNOTEC adhered to its sustainability principles: avoiding agricultural and protected areas, prioritising degraded land, and designing the project to minimise ecological disturbance. The result was a fully rehabilitated, safe, and productive renewable energy site—an exemplary model of how industrial wastelands can be transformed into clean energy assets.
The Pernik project exemplifies SUNOTEC’s mission to combine innovation, sustainability, and responsible land use, proving that every challenge can be turned into an opportunity for renewable transformation.
