Utility-scale solar projects

String inverters for large PV plants on medium-voltage grids

REFUsol inverters up to 360 kW, certified to VDE-AR-N 4110 and EN 50549, plus REFUlink for plant control and REFUview for monitoring with data hosting in Germany.

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Solarpark im Abendlicht mit REFUsol-Wechselrichter an der Unterkonstruktion

What matters in utility-scale solar

Solar parks feed into the medium- or high-voltage grid. The grid operator requires a plant certificate, firm specifications for active and reactive power, and a secure connection to its control room.

At the same time, the availability of every single inverter determines the yield, over twenty years and more. Planning, certification and operation therefore have to fit together from the start.

Challenges

Grid connection and certificates

Unit certificates to VDE-AR-N 4110 are a prerequisite for the plant certificate and therefore for connection to the medium-voltage grid.

Reactive power and weak grids

EGrid operators specify reactive power and power limits, often at grid connection points with low short-circuit power.

Yield and availability

High efficiency, full power even in the heat and fast fault diagnosis secure the yield over the entire service life.

Data security

Operators of critical infrastructure must secure access and data flows in a traceable way, including with regard to NIS2.

NIS2-ready

Security to the state of the art

REFUlink and REFUview support operators with the requirements of NIS2, with hosting and data processing in Germany as well as user and rights management.

How REFU delivers utility-scale solar

String inverters from the utility series spread the power across many units: if one fails, the rest of the plant keeps running. REFUlink applies the grid operator’s setpoints to all inverters, and REFUview shows output and availability in real time.

REFUsol 360K-6TREFUsol 250K-5TREFUsol 125K-10TREFUlinkREFUviewGrid operator / control room

up to 360 kW

AC power per inverter

99,01 %

max. efficiency

1.500 V

max. DC voltage

bis 60

inverters per REFUlink

Suitable products

Utility inverters

REFUsol 360K-6T

Rugged for large solar parks in harsh conditions

AC power
363 kW
MPPTs
6
max. efficiency
99.01 %

REFUsol 250K-5T

For solar parks with full power even in hot conditions

AC power
250 kW
MPPTs
5
max. efficiency
99.01 %

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 %

System & monitoring

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.

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

Grid integration

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

Learn more

Data security

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

Learn more

Repowering

Replace old inverters, meet new grid requirements, monitor everything centrally.

Learn more

Discuss your project

Planning a solar park? We advise you personally, directly with our engineers.

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

Request a project