Fronius Tauro: Do you know all its features?

Available in power classes from 50 to 100 kW, the three-phase Fronius Tauro promises maximum performance, even in the most demanding conditions. Its intelligent hardware design not only helps to optimize system balance costs but also offers unprecedented flexibility in system design. With the Fronius Tauro inverter, both centralized (P version) and decentralized (D version) system designs can be implemented. In addition, one of the simplest installations and some of the fastest servicing on the market guarantee maximum safety.

Some advantages of the Tauro inverter:


        • Quick installation and efficient maintenance
        • Protect power electronics with active cooling
        • Optimum temperature compensation thanks to the double-walled housing
        • Stable, high performance at ambient temperatures up to 50°C
        • The 27 kg power transfer unit can be easily replaced by a single person
        • Efficient service management and targeted online support with Fronius Solar.SOS
        • Possibility to combine Tauro and Tauro ECO
        • AC-Daisy Chaining
        • Built-in surge protection
        • Reduced component and wiring requirements
        • Open architecture system
        • Easy integration of accessories and third-party components


There are many versions of the Fronius Tauro range, but how do we know which one we need? The Fronius Configurator will help you.

Tauro Configurator

Using the configurator is very simple and quick. The system asks you 6 questions and you can choose from the answers provided.


The first question is the design of the system. For a centralized design, not short AC cabling but long DC cabling is required, and vice versa for a decentralized design. For large power plants (>1.2-1.6 MW) or if the transformer is far away, the centralized version is more practical, but in this case more strings have to be routed to the inverter in extra DC collector boxes. Also, the centralized version has the usual MC4 DC connectors, and the decentralized version has DC gland boxes that can accept 90 mm2 cables.



The second question asks you to choose the power rating (50, 99, or 100 kW) and the number of MPPTs of the inverter. The ECO inverters have 1 MPPT and a narrower voltage range (580-930 V), whereas the regular inverter has 3 MPPTs and a wider voltage range (400-870 V). ECO inverters are more useful for large power plants, where there is likely to be no different orientation and tilt. And the standard design can overcome these problems. The 99 kW inverter is needed to comply with the limits. In many calls for tender, it is stated, e.g. “power plant below 500 kW”. In such cases, 4×100 kW and 1×99 kW are the appropriate choices

Tauro 50-3-D 


Tauro ECO 50-3-D 


Tauro ECO 99-3-D 


Tauro ECO 100-3-D 


Thirdly, we can select the fuses: a 15 A fuse is recommended up to 10 A module current, and a 20 A fuse up to 14.5 A module current. For modules with higher currents, such as the Canadian Solar HiKu7, we should choose the P (precombined) inverter, which has a significantly higher input current. Fuses are only required for the D (decentralized) versions, for P (precombined) systems they must be placed outside the inverter in a separate socket.

15 A fuses for 50 kW inverter (4,240,340)

20 A fuses for 50 kW inverter (4,240,341)

The next step is to decide on the SPDs. Do we need AC and DC T1+T2, or is plain AC and DC T2 enough? These SPDs are standard, so we can replace them with any other standard device in the inverter later.

SPD Type 1+ 2 (4,240,334)

SPD Type 2 (4,240,332)

The next option is to design the AC cabling. We have three options:

        • AC Daisy Chaining – in this case, inverters are daisy chained to reduce the number of AC cables required (up to 200 kW). Only single core cables (10-28 mm) can be used in this version. This is a big saving on cables and costs.
        • Single-core design – in this case, the inverter can accommodate AC cables where each cable is connected via separate glands (10-28 mm). The single-core version is much easier for installers to work with, and the wiring is simpler as you don’t have to handle all 5 wires in one go. Another advantage is that you can use thicker cables than with the multi-core version.
        • Multi-core version – in this case, a large gland is available (max 63 mm). Multi-core cables are more difficult to work with, but there will be less loss due to the wires.

AC Daisy Chaining (4,240,330)

Single-Core (4,240,329)

Multi-Core (4,240,328)

Finally, we need to decide whether we want an AC disconnect switch or not.

AC disconnector (4,240,338)

Without AC disconnector

If everything is selected correctly, the system will tell you which inverter you need and what features it has. We can add this to our configuration, or add an inverter with other parameters if required.

Tauro 50-3-D (4,210,300,001)

System design: Decentralised

Fuses: 20 A fuses for 50 kW inverters (4,240,341)

Surge protective device (SPD): Type 2 (4,240,332)

AC connection: Single-Core (4,240,329)

AC disconnector: AC disconnector (4,240,338)

Quantity:  1


Once you have created your configuration, you can choose from three more accessories:


        • Ground mounting rack for the inverter: necessary if you are not installing the inverter on a wall. The device can be installed quickly, as it only needs a few screws to be fixed at the fixing points.


        • Protection hoses: The AC terminals can reach a temperature of up to 90°C under certain circumstances. If cables are used that cannot withstand this temperature, this protection hose can be passed over the phases and neutral conductor to provide additional protection.


        • DC disconnector locking device: This option can be used to lock the DC disconnector during operation. This is required in some markets (e.g. Australia)

How to order with Solarity?

The answer is very simple: by clicking on the “CSV Export” button, the system will generate a file that you can send to our colleagues to place your order. The CSV will contain all the inverter configurations you have added, as well as the accessories.