At the address Celine 3 in Zabok, the solar power plant project “SE Tehnoguma” was successfully implemented through the collaboration of investor Tehnoguma d.o.o. and project designer Neteko d.o.o. The power plant is designed as a rooftop photovoltaic system with an installed capacity of 132 kW, technically limited to 99 kW, in accordance with HEP’s (Croatian electricity provider) low-voltage grid connection requirements. The plant’s purpose is to generate electricity for self-consumption, operating in parallel with the distribution grid.
The goal of the project is to increase the investor’s energy self-sufficiency while reducing electricity costs and greenhouse gas emissions. This initiative supports sustainable development objectives and the transition to renewable energy sources. The plant is expected to produce approximately 148,580 kWh annually, reducing CO₂ emissions by around 69,800 kg per year.
The system consists of 340 high-efficiency monocrystalline photovoltaic modules (WINAICO WST-410MGX-P1), installed on a rooftop surface area of 666 m². The generated direct current is converted into alternating current using three advanced three-phase inverters (Huawei SUN2000-40KTL-M3). The plant is engineered for continuous operation with high efficiency and minimal energy losses, and it includes integrated surge and electric shock protection systems.
The system is optimized for local climatic conditions, using computer simulations to assess energy output and losses caused by shading, tilt, orientation, and other factors. According to analysis, the system achieves a self-consumption rate of 92.3%, and the total energy self-sufficiency amounts to 27.4%, significantly reducing the need for grid electricity.
The project complies fully with applicable laws and technical standards, including the Building Act, Fire Protection Act, regulations on electromagnetic compatibility, and numerous standards for electrical installation design. All installed equipment meets the highest technical and safety criteria.
The total investment amounted to €110,928.38, with a projected payback period of less than 4 years and an internal rate of return (IRR) of 27.17%. The estimated cost of electricity production is €0.0396/kWh, making the project economically viable in the context of current and anticipated electricity prices.
“SE Tehnoguma” stands as a best-practice example in the application of renewable energy in industrial settings, demonstrating that energy transition can be both financially justified and environmentally beneficial. The project was implemented with high expertise and responsibility, ensuring long-term sustainability and system reliability.