Maximizing PV Value Under Grid Instability in Ukraine
Project Overview
This project showcases a BESS for Energy Shifting in Ukraine, designed to capture surplus PV energy under unstable grid conditions and shift discharge to peak-price hours to protect project revenue.
In response to Ukraine’s unstable grid conditions and the need to protect PV revenue under frequent curtailment, FFD POWER deployed a 945kW/2,097kWh BESS to support PV energy shifting for a grid-export PV site. The system bridges the gap between high PV availability and limited grid acceptance. The solution captures otherwise-curtailed PV energy during grid outages, then exports it when the grid is available and market prices are higher—improving renewable utilization, stabilizing site operation, and maximizing project revenue.
Project Background
The customer operates a PV plant in Ukraine where grid supply and export conditions can be unstable. Most PV generation is normally exported to the grid; however, during grid outages or curtailment periods, PV output can be partially or fully wasted. At the same time, PV export tariffs may be low during certain hours. The project required an energy storage solution that could capture surplus PV when the grid is unavailable and dispatch energy when grid conditions and prices are favorable, while maintaining reliable operation in low-temperature environments.
Project Challenge
- Grid Instability & Curtailment: Grid outages and limited acceptance can force PV to curtail, directly reducing revenue.
- PV Value Optimization: PV export prices are low during some hours; energy must be shifted to higher-value periods.
- Off-Grid PV Charging & Low-Temperature Operation: The BESS must charge from PV during grid-loss events and operate reliably in cold climates.
FFD POWER Solution
FFD POWER delivered a PV-integrated BESS controlled by EMS to maximize renewable utilization and project economics. When grid export is constrained or unavailable, the system prioritizes charging the battery using PV generation to prevent curtailment. When the grid is restored and prices are higher, the PCS discharges the stored energy to the grid, enabling peak shaving and energy shifting. The solution is engineered for low-temperature operation to ensure stable performance and availability in Ukraine’s climate conditions.
System Specifications
- PV installed : Existing grid-export PV
- BESS POWER : 945 KW
- BESS capacity : 2,349 KWH
- Product used : Galaxy 261L-AIO-2H (105kW/261kWh Unit) * 9
- Architecture: PV + BESS for Curtailment Capture, Energy Shifting, and Price-Based Dispatch
Operational Logic: PV Energy Shifting and Curtailment Capture
The EMS coordinates PV, battery, and grid-export operation to maximize revenue while protecting system stability
- PV-to-BESS Charging During Grid Loss: When the grid is down or export is restricted, PV power is routed to charge the BESS to avoid curtailment and energy waste.
- Price-Based Energy Shifting: When the grid is available and electricity prices are higher, the PCS discharges the BESS to export energy, improving project returns and enabling peak shaving.
- Cold-Climate Reliability: The thermal management system supports stable operation at low temperature, maintaining availability for both PV charging and grid dispatch.
