Construction of a Rooftop Photovoltaic Power Plant in Pančevo

A new rooftop photovoltaic (PV) power plant is installed at the modular container assembly plant in Pančevo. The power plant will be placed on a sloped roof covered with thermal insulation sandwich panels. The primary goal is to partially or fully meet the energy needs of the plant with self-produced clean energy, while any surplus will be fed into the local distribution grid.

Investor: STRABAG D.O.O.
Contractor: Elektrovat
Project location: The works were carried out on the roof of the MK Kliniken – Pančevo, Naval Box – CAL d.o.o.

A 0.99 MWp rooftop photovoltaic power plant is installed in Pančevo by Elektrovat for STRABAG DOO. Learn more about this sustainable energy project!

Capacity and Potential of the Solar System

  • Total Power: 0.99 MWp.

  • PV Panels: 2,179 monocrystalline panels, each with a nominal power of 550 Wp under standard test conditions.

  • Future Expansion: There is a possibility of adding 2×1 MW if additional capacity is required.

Technical Specifications of Solar Panels

Solar Panels – High-Quality Modules

  • Panel Type: Monocrystalline modules (LX–550M/182-144+).

  • Nominal Power: 550 Wp at STC.

  • Installation: Mounted on existing thermal insulation sandwich panels using aluminum brackets.

Inverters and Their Role in the Energy System

  • Model: Sungrow SG125CX-P2 (a total of eight inverters).

  • DC Input: Up to 175 kW, with 12 MPPT inputs per inverter.

  • AC Output: Three-phase, 400 V, 50 Hz, 125 kVA per inverter.

  • Protection: Built-in protection against overvoltage/undervoltage, frequency deviations, and islanding operation.

Electrical Installations and System Connectivity

Cabling and Safety Measures

  • DC Side: Panel strings are connected to inverters using H1Z2Z2-K solar cables.

  • AC Side: Energy is transmitted from the inverters to the low-voltage (0.4 kV) distribution system in two transformer stations (TS1 and TS2) via PP00 cables.

  • Grounding and Potential Equalization: All metal components (panel frames, brackets, cable channels) are integrated into a unified grounding system for safety and fault protection.

Grid Connection and Energy Protection

  • System Protection: Includes overvoltage/undervoltage, overfrequency/underfrequency, and islanding protection.

  • Compliance: The project adheres to applicable regulations and standards in Serbia (e.g., SRPS EN 50549-1 for parallel operation with the low-voltage grid).

  • Energy Measurement: Electricity accounting is performed at the 20 kV level (indirect measurement), recording the amount of energy delivered to the grid.

Advanced Monitoring and Smart Management System

  • Cloud Monitoring: Inverters are connected via the RS485 communication protocol to the COM100E device, which transmits data to the iSolarCloud platform.

  • Real-Time Data Storage: Production, fault, and operational data are stored and can be monitored online in real-time.

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