Global electrification and automation leader providing utility-scale PCS and SCADA/EMS for BESS. PCS100 power conversion systems are deployed in large-scale grid storage projects worldwide.
Danish manufacturer of intelligent hybrid and microgrid controllers for BESS integration. ESS controllers handle automated charging/discharging, peak shaving, and load management while communicating with BMS and PCS over Modbus.
American EMS and BMS provider for utility-scale BESS and solar+storage plants. Turnkey controls, SCADA, cybersecurity, and 24/7 monitoring from Austin.
DNV subsidiary providing cloud-based and on-site monitoring, control, and asset management for BESS. Specializes in energy optimization and grid compliance.
Chinese C&I energy storage specialist and BNEF Tier 1 manufacturer. China's #1 user-side energy storage integrator with over 1,000 projects and 20,000 eBlock units deployed.
Chinese smart grid and energy storage company listed on the Shanghai Stock Exchange. Offers liquid-cooled battery containers, energy storage cabinets, and integrated EMS platforms.
Vendor-agnostic energy management software. Unity platform integrates SCADA, EMS, PPC, and asset management for BESS and hybrid plants in 70+ countries.
US-based BESS company (Mitsubishi Power and EES joint venture) offering integrated energy storage platforms. Over 6 GWh deployed across 35+ utility-scale projects.
Chinese BESS manufacturer offering modular cabinet and container energy storage from 120 kWh to 5 MWh, standalone PCS, and smart microgrid controllers.
Global energy technology company providing SINACON BESS systems from PCS to full AC block and SCADA. Targets utility-scale grid stability applications with turnkey solutions.
Chinese BESS manufacturer specializing in PCS, battery packs, BMS, and complete energy storage systems. Top 10 Chinese utility-scale BESS OEM supplier with 100+ large-scale projects installed globally.
Plant controls encompass the monitoring, control, and optimization systems that run a BESS project during operations. The three core components are: an EMS (energy management system), which optimizes charge/discharge strategies and manages market participation; a SCADA system, which monitors plant health in real time and manages alarms; and a PPC (power plant controller), which regulates active and reactive power at the point of interconnection to comply with grid codes.
For procurement teams, plant controls are critical to the commercial performance of a BESS. A misconfigured or underperforming plant controller can significantly reduce arbitrage and ancillary service revenues, cause grid code violations, and shorten battery life through suboptimal dispatch.
Key Specifications
What to look for when evaluating plant controls
When shortlisting for a BESS project, these are the key technical specifications that EPC contractors, project developers, and system integrators typically evaluate:
System types
EMS, SCADA, PPC
The three core components are often from different vendors — EMS optimizer, SCADA platform, and PPC. Some manufacturers offer integrated solutions.
Dispatch optimization
AI / rule-based
AI-based optimization uses price forecasts and degradation models to maximize revenue. Rule-based systems are more predictable and easier to audit.
Communication protocols
IEC 61850, Modbus, DNP3
IEC 61850 is the standard for substation and protection communication. Modbus (TCP/RTU) is widely used for device connectivity. DNP3 dominates in North American grids.
Grid code compliance
IEEE 1547, EN 50549
The PPC must meet local grid connection rules. Certification is often via unit certificate plus plant certificate.
Remote monitoring
Cloud-based dashboards
Real-time remote monitoring with alerting, performance reports, and historical data. Increasingly also predictive maintenance features.
Cybersecurity
IEC 62443
IEC 62443 covers OT security for industrial automation systems. Increasingly relevant as critical infrastructure classification applies.
FAQ
Frequently asked questions
What role do plant controls play in a BESS project?
Plant controls govern how a BESS is charged, discharged, and operated on the grid. They encompass three core functions: dispatch optimization (when and how much power to inject/absorb), grid regulation (active and reactive power at the point of interconnection per grid code), and health monitoring (operational status, alarms, degradation). The quality of plant controls largely determines how much revenue a BESS actually generates.
What is the difference between EMS, SCADA, and PPC?
The EMS (energy management system) optimizes dispatch — it decides when to charge and discharge to maximize revenue and minimize degradation. SCADA (supervisory control and data acquisition) monitors plant health in real time, collects operational data, and manages alarms. The PPC (power plant controller) regulates active and reactive power at the point of interconnection in real time to comply with grid codes.
Why is grid code compliance important for BESS controls?
Every grid-connected BESS must comply with local grid connection rules. These define requirements for active/reactive power regulation, frequency support, fault ride-through, and increasingly grid-forming capabilities. Non-compliance can result in connection refusal, contractual penalties, or curtailment. The PPC is the component that ensures this compliance in real time.
What communication protocols are used in BESS plant controls?
The three main protocols are: IEC 61850 (standard communication for substation and protection systems — increasingly also for BESS), Modbus TCP/RTU (widely used for device connectivity, BMS communication, and simple control), and DNP3 (common in North American grids for SCADA communication). Many BESS projects use a combination: IEC 61850 for the grid side, Modbus for internal devices, and proprietary APIs for cloud connectivity.
