Repowering

Modernise existing PV plants without rebuilding everything

New REFUsol inverters replace individual older units, and REFUlink connects old and new generations together. Existing plants meet new grid operator requirements, and REFUview monitors everything centrally.

Request a projectSuitable products
REFUsol 125K-10T

What matters in repowering

Many PV plants have been running for more than ten years. Individual inverters fail or are no longer available, and grid operators now require controllable feed-in from existing plants too.

A complete rebuild is rarely necessary. What matters is that new and existing equipment work together and operation continues during the changeover.

Challenges

New grid requirements

Grid operators require active power control and remote shutdown from existing plants too.

Replacing individual units

Faulty or outdated inverters are replaced one by one while the rest of the plant keeps running.

Mixed generations

Old and new REFU inverters work together in one system via REFUlink and REFUview.

Extending operation

With new inverters and central monitoring, the plant stays economical for longer.

How REFU delivers repowering

REFUlink is installed as a gateway in each plant and applies the grid operator’s setpoints to all connected inverters, including existing units. When individual units are replaced, settings and production history are retained.

REFUsol 125K-10TREFUsol 110K-10TREFUsol 50K-4TREFUlinkREFUviewGrid operator / control room

up to 60

inverters per REFUlink

0 / 30 / 60 / 100 %

DRM levels for power setpoints

Modbus TCP/IP

Connection to grid operator and control system

Real time

Monitoring with REFUview

Suitable products

C&I inverters

REFUsol 125K-10T

More power for large commercial and smaller ground-mounted systems

AC power
110 kW
MPPTs
10
max. efficiency
98.6 %

REFUsol 110K-10T

For complex system layouts with many module arrays

AC power
100 kW
MPPTs
10
max. efficiency
98.6 %

REFUsol 50K-4T

Powerful for large commercial and industrial rooftops

AC power
50 kW
MPPTs
4
max. efficiency
98.8 %

REFUsol 33K-3T

More power for mid-size commercial systems and repowering

AC power
33 kW
MPPTs
3
max. efficiency
98.6 %

REFUsol 25K-3T

For replacement in existing commercial systems

AC power
25 kW
MPPTs
3
max. efficiency
98.6 %

REFUsol 20K-2T

Compact entry model for smaller commercial rooftops

AC power
20 kW
MPPTs
2
max. efficiency
98.6 %

REFUsol 20K-3T

Flexible for commercial rooftops with several roof areas

AC power
20 kW
MPPTs
3
max. efficiency
98.6 %

System & monitoring

REFUlink

Central interface for PV systems and grid operators

REFUstix USB

Compact data logger for individual inverters

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.

Project developers

  • Grid-compliant operation to European grid codes

    REFUsol inverters are certified to EN 50549 and the German VDE application rules. This gives you planning certainty for the grid connection of your PV project.

  • Monitoring with data hosting in Germany

    With REFUview, you keep track of the output and availability of your plants. The data is hosted and processed in Germany.

  • Complete documents for permits and grid connection

    Unit certificates, declarations of conformity and datasheets are ready in the download centre, so the plant certificate and grid connection procedure move ahead quickly.

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

Grid integration

Grid codes, reactive power and power control for grid connection.

Learn more

Discuss your project

Looking to modernise an existing plant? We advise you personally, directly with our engineers.

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

Request a project