REFUlink - Smart Link for Smarter Energy
Central communication and control unit for new and existing REFUsol systems.
Connects inverters, data, and grid requirements within a controllable infrastructure.
Technical interface between inverter and system control.
REFUlink collects operational data from REFUsol inverters via RS485 or LAN and transmits it to the REFUview monitoring portal.
Via Modbus TCP/IP, the system also enables centralized power control and integration into higher-level SCADA or EMS systems.
Core Technical Functions of REFUlink
The core functions for system integration, power control, and mixed-generation setups summarized concisely.
Modbus TCP Power Control
Active and reactive power control via Modbus TCP/IP (Port 5020).
Direct integration into SCADA and EMS systems.
Register-based control according to defined address ranges.
DRM & Digital Inputs
Four digital inputs for power reduction (0/30/60/100%).
Direct implementation of external grid requirements.
No additional control hardware required.
RS485 & LAN Integration
Communication with REFUsol Gen 1, Gen 3, and Gen 4.
Support for RS485 fieldbus and LAN architectures.
Ideal for repowering and mixed-generation installations.
Technical Power Control via Modbus
Direct control of active and reactive power via defined register ranges (Port 5020).
Modbus TCP/IP
Port: 5020
Protocol: TCP
Register Access: Read / Write
Response Time: < 100 ms
Registers
Function
Description
0x1001
Control Mode
Activation of external power control
0x1002
Active Power
Power limitation in % (0–100%)
0x1003
Reactive Power
Reactive power control
0x1005
Grid Connect
Grid disconnection / reconnection
REFUlink Product Variants
REFUlink is available in three variants — designed for different plant sizes, with Modbus TCP/IP control, RS485 communication, and REFUview integration.
REFUlink Core
For 1–6 inverters.
Basic gateway for smaller PV systems and standardized installations.
Direct Modbus integration and monitoring via REFUview.
REFUlink Plus
For 7-30 inverters.
Scalable solution for medium-sized plants with extended integration requirements.
Optimized for stable communication across larger RS485 networks.
REFUlink Ultra
For >30 inverters.
High-capacity gateway for large PV parks and utility-scale systems.
Centralized control and monitoring of extensive inverter networks.
REFUview – Monitoring for PV Systems
Central platform for monitoring, analytics, and user management — with secure hosting in Germany.
Real-time data and plant overview
Quick overview of system status, performance, and plant structure.
User and permission management
Centralized management of roles and access permissions.
Configuration of new inverters
Adjust parameters directly via REFUview.
Support for mixed installations
Monitor new and existing systems together.
REFUlink Application Areas
REFUlink enables the integration and control of PV inverters across a wide range of plant architectures.
Repowering of existing systems
Integration of new inverters into existing PV systems with centralized power control and monitoring.
SCADA- and EMS-Integration
Communication interface for higher-level energy management and SCADA systems via Modbus TCP/IP.
Utility-Scale PV Plants
Scalable control of large PV plants with many inverters and complex grid requirements.
Who REFUlink Is Designed For
REFUlink enables system integration, power control, and monitoring for various stakeholders across the PV ecosystem.
EPC Companies
Integration and control of inverters in new PV projects with centralized monitoring and grid regulation.
Municipal Utilities and Energy Providers
Integration of PV systems into grid and energy management structures.
PV Plant Operators
Monitoring, analysis, and power control of existing plants via REFUview.
System Integrators
Connection of inverters to SCADA, EMS, or monitoring systems via standardized interfaces.
Proven in PV projects worldwide
REFUlink is used in PV projects of various sizes — from industrial rooftop installations to large solar parks.
“REFUlink turned a regulatory challenge into a straightforward modernization of our plants — with minimal effort and high operational reliability.”
Mr. Nikos Mavrogiannis
Repowering of a PV portfolio in Greece – 1.4 MW
PROJECT
Greece
POWER
1,4 MW
INVERTER
REFUsol
INTEGRATION
REFUlink + REFUview
Three existing PV plants in Greece had to be retrofitted to comply with new grid operator requirements for active power control and remote shutdown. The objective was to implement the regulatory requirements without interrupting ongoing plant operation.
Retrofit to meet new grid requirements
With REFUlink, one gateway was installed per plant, enabling centralized power control and communication with the grid operator. At the same time, the existing REFUsol inverters were integrated into modern monitoring and control structures.
Compliance with new regulatory requirements for power control
Modernization of existing inverters through new communication interfaces
Simplified replacement of individual inverters without reconfiguration
Centralized monitoring of all plants via REFUview
Integrate REFUlink into your plant
Our experts support the integration of REFUlink and REFUview into new or existing PV systems.
Modbus TCP/IP Integration
REFUview Monitoring Platform
Scalable from 1 to over 30 inverters