Fronius Eco 25.0 kW 3ph Solar Inverter + Data Manager

Fronius Eco 25.0-3-S 3ph 25kW Solar Inverter

£1,989.90 excl. VAT

  • 3 phase (Fronius 25.0-3-S)
  • 25 kW
  • 1 MPPT
  • Warranty: 5 years (optional up to 20)
  • incl. display
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The Fronius Eco 25.0-3-S 3ph 25kW Solar Inverter is a compact project inverter for maximum yields. The three-phase Fronius Eco in power categories 25.0 and 27.0 kW perfectly meets all the requirements of large-scale installations.

Fronius Eco 25.0-3-S 25kW Solar Inverter for Sale

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.

The main features of the Fronius solar inverter

  • SnapINverter Technology
  • Integrated data communication
  • Smart Grid Ready
  • Dynamic Peak Manager
  • Zero feed-in
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.

Related links to the Fronius Eco 25.0-3-S 3ph 25kW Solar Inverter :

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Additional information

Weight 35.7 kg
Dimensions 51 × 22.5 × 72.5 cm
Product Category

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



Rated Power (W/kW)

25 kW

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Fronius Eco 25.0-3-S 3ph 25kW Solar Inverter

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Technical Data

INPUT DATA Fronius Eco 25.0-3-S
Max. input current
(Idc max)
44.2 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 trackers 1
Number of DC connections 6
Max. PV generator output (Pdc max) 37.8 kWpeak
AC nominal output (Pac,r) 25,000 W
Max. output power 25,000 VA
AC output current (Iac no) 37.9 A / 36.2 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
Weight 35.7 kg
Degree of protection IP 66
Protection class 1
Overvoltage category (DC / AC)1) 1 + 2 / 3
Night time consumption < 1 W
Inverter design Transformerless
Cooling Regulated air cooling
Installation Indoor and outdoor installation
Ambient temperature range -25°C to +60°C
Permitted humidity 0 % to 100 %
Max. altitude 2,000 m
DC connection technology 6x DC+ and 6x DC- screw terminals 2.5 mm² – 16 mm²
AC connection technology 5 pole AC screw terminals 2.5 mm² – 16 mm²
Certificates and compliance with standards ÖVE / 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. efficiency 98.2 %
European efficiency (ηEU) 97.5 %
η at 5 % Pac,r2)  95.1 / 95.1 %
η at 10 % Pac,r2) 97.0 / 95.2 %
η at 20 % Pac,r2) 97.8 / 96.9 %
η at 25 % Pac,r2) 98.0 / 97.0 %
η at 30 % Pac,r2) 98.1 / 97.2 %
η at 50 % Pac,r2) 98.2 / 97.5 %
η at 75 % Pac,r2) 98.2 / 97.5 %
η at 100 % Pac,r2) 98.2 / 97.5 %
MPP adaption efficiency > 99.9 %
DC insulation measurement Yes
Overload behaviour Operating point shift, power limitation
DC disconnector Yes
Integrated string fuse holders3) Yes
Reverse polarity protection Yes
WLAN / Ethernet LAN Fronius Solar.web, Modbus TCP SunSpec, Fronius Solar API (JSON)
6 inputs and 4 digital in/out Interface 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 Webserver Included
External Input4) S0 meter connection / Evaluation of overvoltage protection
RS485 Modbus 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.