Grid integration

Grid-compliant feed-in, from low to medium voltage

REFUsol inverters are certified to EN 50549 and the German VDE application rules 4105 or 4110. REFUlink applies active and reactive power setpoints to all inverters in a plant.

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What matters in grid integration

With every new PV plant, grid operators’ requirements increase. Active and reactive power must be controllable, and the plant must respond to setpoints from the control room.

Grid connection requires unit certificates for the inverters and, depending on the size of the plant, a plant certificate.

Challenges

Certified to grid codes

EN 50549-1 and VDE-AR-N 4105, depending on the model also 4110.

Reactive power

Adjustable power factor from 0.8 inductive to 0.8 capacitive on all REFUsol inverters.

Power control

REFUlink applies setpoints via Modbus TCP/IP or the DRM levels 0, 30, 60 and 100 %.

Grid protection

Anti-islanding to IEC 62116: if the grid fails, the inverter disconnects safely.

How REFU delivers grid integration

Every REFUsol inverter controls its own active and reactive power. REFUlink combines up to 60 inverters and connects them to the park controller, control room or grid operator.

REFUsolREFUlinkREFUviewGrid operator / control room

4105 / 4110

VDE-AR-N, depending on the model

0.8 ind. – 0.8 cap.

Power factor, all inverters

0 / 30 / 60 / 100 %

DRM levels

up to 60

inverters per REFUlink

Suitable products

REFUlink

Central interface for PV systems and grid operators

REFUview

Central platform for monitoring, analysis and user management

Your benefit as …

EPCs & general contractors

  • Datasheets, certificates and manuals in the download centre

    Datasheets, unit certificates, declarations of conformity and manuals are all in one place in the download centre, always in the current version.

  • Personal contacts in sales and engineering

    For system design, quotations and detailed technical questions, you talk directly to our sales team and our engineers, including for large solar parks.

  • Scalable with REFUlink and REFUview

    REFUlink connects up to 60 inverters to the control room and the grid operator, while REFUview brings all operating data together. The system grows with your plant.

Installers & electrical contractors

  • Easy commissioning

    Many models can be set up via app over Bluetooth directly at the inverter. This saves time when commissioning on commercial rooftops.

  • Technical support from Germany

    For questions about installation, settings or error messages, you can reach our technical support in Germany, personally and without detours.

  • Fits new and existing systems

    REFUsol inverters can be integrated into new and existing PV plants, and via REFUlink also together with older generations of REFU inverters.

Operators & investors

  • Real-time monitoring with REFUview

    REFUview shows the status, output and yield of your PV plant in real time, on your computer and on your smartphone. Spot deviations early and protect your yield.

  • Data hosting in Germany

    Your plant data is hosted and processed in Germany. This makes data protection and data sovereignty easier, especially for operators of critical infrastructure.

  • Technical support from Germany

    For questions about operation, faults or firmware updates, you can reach our technical support in Germany, personally and without detours.

Planners & engineers

  • Unit certificates and declarations of conformity in the download centre

    Download the evidence you need for plant design, such as unit certificates to VDE-AR-N 4105 and 4110 or EN 50549, directly and without a request.

  • Complete technical data for comparison

    Every product page shows all values from the datasheet, from the MPPT voltage range to the overvoltage category, clearly arranged by group.

  • Direct contact with engineering

    For detailed questions on grid protection, reactive power or plant control, talk directly to our engineers, without detours.

Utilities & grid operators

  • Power control via Modbus TCP/IP and DRM

    With REFUlink, you apply active and reactive power setpoints via Modbus TCP/IP or the DRM levels 0, 30, 60 and 100 % on all connected inverters.

  • Grid-compliant operation to grid codes

    The inverters meet the requirements of EN 50549 and the German VDE application rules for connection to low- and medium-voltage grids, certified and documented.

  • Data hosting in Germany

    Operating data is hosted and processed in Germany. This supports operators of critical infrastructure with data protection and information security.

Related solutions

Utility-scale solar projects

Inverters for large plants on medium-voltage grids.

Learn more

Data security

Data hosting in Germany, rights management and NIS2-ready.

Learn more

Discuss your project

Questions about grid connection? We advise you personally, directly with our engineers.

Or directly+49 7121 145 1888info@refu.com

Request a project