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EMS & SCADA · BESS

Energy Management System (EMS) for BESS

An integrated EMS and SCADA for Battery Energy Storage Systems. Closed-loop control at the Point of Interconnection, SoC management, frequency and voltage support and aggregator connectivity for FCR, aFRR and mFRR, proven across 5 BESS in operation in Greece.

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SCADA + EMS

SCADA & EMS for Battery Energy Storage Systems (BESS)

Rener Energy delivers a fully integrated SCADA and Energy Management System (EMS) tailored for Battery Energy Storage Systems. The solution combines real-time monitoring with advanced control algorithms to ensure optimal performance, safety, and grid compliance.

The EMS continuously manages energy flows, battery state, and grid interaction, enabling participation in energy markets while maximizing asset value and lifecycle performance.

Core functionalities

  • Intelligent charge/discharge optimization and SOC management
  • Closed-loop PID control for active and reactive power
  • Grid support functions (frequency and voltage regulation)
  • Real-time monitoring from cell level to grid connection point
  • Advanced control modes (droop control, cos φ, FSM)
  • Seamless integration with aggregators and dispatch systems
  • Sub-second response for real-time grid services
  • Support for ancillary services (FCR, aFRR, mFRR)

System highlights

  • Monitoring of BMS, PCS, transformers, and switchgear
  • 7000+ signals processed in under 600 ms
  • Redundant Power Plant Controller for high availability
  • Cloud and on-site data architecture for reliability and scalability
  • AI-driven analytics and predictive maintenance capabilities
IEC 61850IEC 104MMS & GOOSEModbus TCPFCR / aFRR / mFRRAggregator Ready

Nexus in depth

Control, architecture, security, markets

Every technical layer of the Nexus platform, from closed-loop grid control to aggregator connectivity.

Power Control Modes

Active Power Control

Tracks a reference value. Negative means absorption, positive means injection, with configurable ramp rates per grid code.

Reactive Power Control

Reactive setpoint tracking with the same absorption and injection logic for grid-stability services.

Power Factor cosφ

Maintains cosφ at the interconnection point by modulating reactive power relative to active output.

Ramp Rate Control

Controlled rate of change for power injection and absorption, configurable per plant and grid code.

Grid Support Modes

Frequency Support

Active-frequency droop on the operator’s P-F curve. FSM for 200 mHz, LFSM-O/U for larger excursions. Supports FCR, aFRR, mFRR services.

Voltage Control

Reactive droop at the POI following a U-Q characteristic, tunable per grid code.

State of Charge Management

Manages SoC bands across all plant containers for optimal battery longevity and availability.

Grid-Forming

Grid-forming capabilities for black-start and weak-grid operation in islanded conditions.

Integration process

How your plant goes live in Nexus

We start from your real equipment, not a generic template.

1

Technical Site Mapping

We document capacity, BMS, PCS, meters, MV/LV, communications, and project obligations on-site.

2

Redundant Controller

We install the clustered PPC Advantech MIC-770 V3 with automatic failover and all field accessories.

3

Protocols & Network

Modbus, IEC 61850, IEC 104/101, MMS & GOOSE in the field and IEC 104 toward HEDNO, with supervision UI.

4

Live Operations & Market

Closed-loop control, live monitoring, alarms, setpoints, and data ready for aggregator workflows from day one.

Why Nexus

Built for BESS and Solar PV

Six reasons operators and aggregators choose Nexus over generic SCADA platforms.

Scalable

Cloud-native fleet management

From one site to a national portfolio — the same platform, the same dashboard, zero reconfiguration.

<600ms

7,000+ signals, 1-second loops

High-speed parallel data acquisition with sub-second response for real-time grid services.

Zero-trust

Enterprise authentication & encryption

Role-based access, encrypted channels, and immutable audit logs across all user and system interactions.

Redundant

Clustered PPC & dual storage

Redundant on-site hardware with automatic failover and dual cloud backup — no single point of failure.

Compliant

Full grid-code & DSO/TSO support

Pre-deployment validation, HEDNO certification, and continuous compliance monitoring built in.

AI/ML

Predictive analytics & fleet insights

Machine learning tools for anomaly detection, performance forecasting, and fleet-wide optimization.

FAQ

Clear answers for BESS and PV owners

The essentials before connecting your station to Nexus or preparing for market-ready operations.

Call an engineerSend email

Battery storage (BESS) and photovoltaics, with or without a data logger — multi-vendor inverters, BMS, PCS, MV/LV, and cooling and fire-suppression subsystems are all supported.

Closed-loop PID for active and reactive power, ramp rate control, power factor (cos φ), frequency support (FSM ±200 mHz, LFSM-O/U), voltage droop, SoC band management, and grid-forming for black-start. All algorithms are configurable per grid code.

Modbus TCP and RTU, IEC 61850, IEC 104, IEC 101, MMS & GOOSE in the field. IEC 104 toward HEDNO for grid operator communication. HEnEx/IPTO data interfaces for market connectivity.

7,000+ signals delivered in under 600ms via parallel connections. 1-second monitoring loops. Redundant on-site PPC with automatic failover and dual cloud storage ensure high availability. All proven in production across 5 commissioned plants.

Nexus is designed to work with every aggregator platform. Setpoints from the aggregator are executed in real-time via the closed-loop EMS. Full HEDNO compliance for DSO/TSO telemetry, and live HEnEx/IPTO data feeds for market operations.

Yes. Nexus is built on a zero-trust architecture with enterprise authentication, end-to-end encryption, role-based access control, and full audit logs.

Contact

Bring your plant into Nexus with RENER ENERGY

Whether you are deploying a new BESS, upgrading an existing SCADA system, or need compliant telemetry for a solar PV plant, our engineers will assess your site and design the right solution.

Location
32 Adrianeiou Street, 11525 Neo Psychiko, Athens