Project Background

A medium-sized event venue in Thessaloniki, Greece operates a rooftop PV system under the country’s Zero-Export policy for distributed generation. Located in a mountainous area with highly variable load profiles, the site faced limited solar self-consumption and rising reliance on grid electricity. The project aimed to maximize on-site PV utilization while maintaining full regulatory compliance.

Client Demands

Comply with Greece’s "Zero-Export" policy, prohibiting excess PV power from being fed back into the grid.Break data silos between legacy third-party inverters and meters to improve solar energy utilization.Mitigate the impact of load volatility from event activities, reducing grid dependency and electricity bills.Overcome mountainous terrain challenges for stable wiring and reliable grid connection.

CESC Solution

  • Flagship ESS Deployment: Implemented the Mercury 233 EU all-in-one energy storage system (105kW/233kWh) with a "Software Customization + Hardware Adaptation" core strategy.
  • Unified EMS Communication: Reconstructed energy management system (EMS) protocols to seamlessly integrate legacy third-party equipment, enabling centralized real-time data monitoring and breaking data silos.
  • Precision Three-Phase Control: Leveraged the PCS’s unique unbalanced load handling capability to strictly adhere to "Zero-Export" mandates while maximizing on-site PV self-consumption.
  • Mountain-optimized Deployment: Addressed complex mountainous wiring and long-distance grid connection challenges through specialized engineering, ensuring rapid and high-quality installation.

Key achievements

  • 100% Zero-Export Compliance (Greece): Fully compliant operation under Greek Zero-Export regulations, with stable and precise export limitation.
  • Higher PV Self-Consumption: Captured and utilized surplus PV generation, eliminating curtailment and unlocking the full value of existing solar assets.
  • Lower Operating Costs: Shifted stored solar energy to peak demand periods, significantly reducing grid dependence and OPEX.
  • Stable Performance in Mountain Terrain:Reliable system operation under mountainous site conditions and fluctuating event-based loads.

Solution Expansion & Upgrade Applications

  • Retrofit Compatibility: The "Software + Hardware" customization approach is adaptable for commercial venues with legacy PV and energy equipment, supporting seamless retrofits.
  • Regulatory Adaptability: Serves as a replicable model for businesses in regions with "Zero-Export" or similar grid policies, turning regulatory obstacles into competitive advantages.
  • Versatile Commercial Application: Ideal for event venues, hotels, and other commercial properties with volatile power demand and existing PV systems, enabling energy independence.