Case Study: Integration of a 1 MWh Storage System into a 400 kW Photovoltaic Park
The photovoltaic park, with an installed capacity of 400 kW and equipped with SMA Sunny invertersoperates in full grid-injection mode. To optimize economic performance and reduce losses caused by grid limitations and tariff fluctuations, an electrical energy storage system has been installed , a 1 MWh variant..
Main objectives of integrating the storage system:
- Peak shaving of photovoltaic injection;
- Storing energy during low-price (off-peak) periods;
- Selling stored energy during high-price (peak / day-ahead) periods;
- Stabilizing grid injection and maximizing revenue.
Technical Configuration
Photovoltaic Component:
- Installed power: 400 kW
- Inverters: SMA Sunny Tripower
- Operating mode: Injecție totală în rețea
Storage system:
- Total capacity: , a 1 MWh variant.
- Bidirectional inverter power: 500 kW
- Tehnologie baterii: Li-Fe-PO₄
- Fully integrated with: EMS, BMS, STS, HVAC, fire suppression system, lighting, protections
Operating Strategy
The system is controlled by Energy Management System (EMS)which correlates in real-time the estimated production, market energy prices, battery status, and injection thresholds. The charge/discharge cycles are automatically controlled to optimize costs and ensure efficient use of stored energy.
