Fronius Eco 27.0-3-S Light 27kW 3ph Solar Inverter

Fronius Eco 27.0-3-S Light 27kW 3ph Solar Inverter

£2,039.00 excl. VAT




The Fronius Eco Solar Inverter is designed for maximum flexibility for the solar pv applications of tomorrow.The three-phase Fronius Eco in power categories 25.0 and 27.0 kW perfectly meets all the requirements of large-scale installations. Thanks to its light weight and SnapINverter mounting system, this transformerless device can be installed quickly and easily either indoors or outdoors. This inverter range is setting new standards with its IP 66 protection class. Furthermore, thanks to its integrated double fuse holders and optional overvoltage protection, string collection boxes are no longer necessary.

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SnapINverter mounting system

The innovative SnapINverter mounting system makes installation and servicing extremely user-friendly. It is not necessary to remove the entire inverter for servicing, just the power stage set compartment. All the cabling, settings and configurations remain in place.

SuperFlex Design

The Fronius SuperFlex Design combines all the system design requirements into a single inverter form. Two MPP trackers combined with a high system voltage and wide input voltage range guarantee maximum flexibility.  The result: an inverter for every application. Thanks to the SuperFlex Design, a single inverter can cope with any challenge – including different roof orientations, shading of one or two strings, or the use of residual modules.

Dynamic Peak Manager

The Dynamic Peak Manager is a new MPP tracking algorithm searching for the optimal operating point. The special feature is that the Dynamic Peak Manager automatically checks the entire characteristic curve on a regular basis and finds the global Maximum Power Point (GMPP), even in partial shade.

The Fronius Eco 27kW 3ph Solar Inverter is Smart Grid Ready

Fronius inverters are ready for the Smart Grid of tomorrow. The inverters are optimally equipped to meet the technical requirements of grids in the future. A series of smart functions, known as Advanced Grid Features, are built into the devices. These include a number of control functions for optimum feed-in of reactive power and effective power.

Zero feed-in

In various countries power grid operators require a PV power feed-in limit as a precondition before connection. With dynamic power reduction, Fronius is offering a solution for optimum feed-in management. The Fronius Eco 27.0-3-S Light 27kW 3ph Solar Inverter allows zero feed-in into the grid. This meaning that no PV power is fed into the grid. The relevant requirements of the grid operator can be fulfilled by simply enabling a setting on the inverter’s web interface.

Fronius Logo
The history of Fronius begins in 1945. The company is now represented by subsidiaries in 28 countries and by sales partners and representatives in over 60 countries, and is a recognised innovation and technology leader. Since 2011, Fronius has been led by the granddaughter of the company founder, Elisabeth Engelbrechtsmüller-Strauß. However, the company´s goal remains the same as ever: to create a sustainable future through innovation, quality and a first-rate service. Join our ZERO Home Bills Community. The best solar power inverters and solar PV Accessories from the best NASDAQ and Bloomberg listed solar manufacturers at the best retail price.

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Additional information

Weight35.7 kg
Dimensions51 × 22.5 × 72.5 cm
Product Category

Inverters, on-grid inverters, Solar Inverters, SOLAR PHOTOVOLTAIC (PV)



Rated Power (W/kW)

27 kW

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Fronius Eco 27.0-3-S Light 27kW 3ph Solar Inverter

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Technical Data

INPUT DATAFronius Eco 27.0-3-S
Max. input current
(Idc max)
47.7 A
Max. array short circuit current
(Isc PV)
71.6 A
Min. input voltage (Udc min)580 V
Feed-in start voltage (Udc start)650 V
Nominal input voltage (Udc,r)580 V
Max. input voltage
(Udc max)
1,000 V
MPP voltage range
(Umpp min – Umpp max)
580 – 850 V
Number of MPP trackers1
Number of DC connections6
Max. PV generator output (Pdc max)37.8 kWpeak
AC nominal output (Pac,r)27,000 W
Max. output power27,000 VA
AC output current (Iac no)40.9 A / 39.1 A
Grid connection (voltage range)3~NPE 380 V / 220 V or 3~NPE 400 V / 230 V (+20 % / -30 %)
Frequency (frequency range)50 Hz / 60 Hz (45 – 65 Hz)
Frequency range (fmin – fmax)45 – 65 Hz
Total harmonic distortion< 2.0 %
Power factor (cos φac,r)0 – 1 ind. / cap.
(height x width x depth)
725 x 510 x 225 mm
Weight35.7 kg
Degree of protectionIP 66
Protection class1
Overvoltage category (DC / AC)1)1 + 2 / 3
Night time consumption< 1 W
Inverter designTransformerless
CoolingRegulated air cooling
InstallationIndoor and outdoor installation
Ambient temperature range-25°C to +60°C
Permitted humidity0 % to 100 %
Max. altitude2,000 m
DC connection technology6x DC+ and 6x DC- screw terminals 2.5 mm² – 16 mm²
AC connection technology5 pole AC screw terminals 2.5 mm² – 16 mm²
Certificates and compliance with standardsÖVE / ÖNORM E 8001-4-712, DIN V VDE 0126-1-1/A1, VDE AR N 4105, IEC 62109-1/-2, IEC 62116, IEC 61727, AS 3100, AS 4777-2, AS 4777-3, CER 06-190, G59/3, UNE 206007-1, SI 4777, CEI 0-16, CEI 0-21
Max. efficiency98.3 %
European efficiency (ηEU)97.6 %
η at 5 % Pac,r2) 95.9 / 93.1 %
η at 10 % Pac,r2)96.8 / 95.7 %
η at 20 % Pac,r2)97.7 / 97.1 %
η at 25 % Pac,r2)98.1 / 97.3 %
η at 30 % Pac,r2)98.1 / 97.4 %
η at 50 % Pac,r2)98.3 / 97.5 %
η at 75 % Pac,r2)98.2 / 97.6 %
η at 100 % Pac,r2)98.1 / 97.5 %
MPP adaption efficiency> 99.9 %
DC insulation measurementYes
Overload behaviourOperating point shift, power limitation
DC disconnectorYes
Integrated string fuse holders3)Yes
Reverse polarity protectionYes
WLAN / Ethernet LANFronius Solar.web, Modbus TCP SunSpec, Fronius Solar API (JSON)
6 inputs and 4 digital in/outInterface to ripple control receiver
USB (type A socket)4)Datalogging, inverter update via USB flash drive
2 x RS422 (RJ45 socket)4)Fronius Solar Net, Interface protocol
Signalling Output4)Energy management (floating relay output)
Datalogger and WebserverIncluded
External Input4)S0 meter connection / Evaluation of overvoltage protection
RS485Modbus RTU SunSpec or meter connection
fronius logo 300x300
The history of the Austrian Fronius begins in 1945. At that time, charging car batteries was not something that could be taken for granted. Günter Fronius was unwilling to accept this. In 1950, Günter Fronius expanded his product portfolio to include welding transformers. Driving forward their growth and internationalisation strategy saw the establishment of subsidiaries around the world. In 1992, the decision was taken to focus on the “future field” of solar energy, which is why the company today is split into three strong divisions: Perfect Welding, Solar Energy and Perfect Charging. Join our ZERO Home Bills Community. The best solar pv inverters from the solar energy brands at the best retail prices on by Solaranna.