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Fronius ECO 27.0-3-S

ECO 27.0-3-S
35.70 KGS
Calculated at checkout
Minimum Purchase:
1 unit(s)
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Product Description

Fronius ECO 27.0-3-S – this is an independent review for Fronius ECO 27.0-3-S we have compiled for your reference. Feel free to add your comments or experiences at the bottom of the page.

The compact project inverter for maximum yields.
The three-phase Fronius Eco in power category 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.

SnapINverter Technology

The special feature in the design of our devices is that the connection compartment is separate from the power stage set compartment. They are installed separately. The connection area and all its cabling is fitted to the wall first. The power stage set compartment is fitted afterwards. The innovative SnapINverter mounting system makes installation and servicing extremely user-friendly. The inverter is simply placed in the wall bracket and then secured. 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.

Integrated data communication
Simple, user-friendly system monitoring is very important to Fronius. With the Fronius Datamanager, we are the first inverter manufacturer to offer a WLAN interface in the inverter itself. The inverter is connected to the internet without additional cabling and grants you the perfect overview of how the PV system is operating.

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. These functions are designed to enable stable grid operation even when the PV system density is very high and to prevent unwanted interruptions to feed-in and associated yield losses. Fronius inverters therefore help to guarantee the yield of a PV system.

Dynamic Peak Manager
The Dynamic Peak Manager is a new MPP tracking algorithm that dynamically adapts its behaviour when 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.

Technical Data


Fronius 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 trackers 1
Number of DC connections 6
Max. PV generator output (Pdc max) 35.7 kWpeak
AC nominal output (Pac,r) 27,000 W
Max. output power 27,000 VA
AC output current (Iac no) 39.0 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) 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 98.3 %
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 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

1) Testing to IEC 62109-1. DIN rail for optional type 2 overvoltage protection fitted. 
2) And at Umpp min / Udc,r / Umpp max
3) Optionally fitted with 6 fuses 15 A/ 1,000 V on the plus side.
4) Also available in the light version.

Subject to modifications.


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