FRONIUS Symo 3.7-3-M

Number of MPP trackers

2

Max. input current (I_{dc max})

16,0 / 16,0 A

Max. short circuit current, module array*

31 / 31 A

DC input voltage range (U_{dc min} - U_{dc max})

150 - 1000 V

Feed-in start voltage (U_{dc start})

200 V

Nominal input voltage (U_dc,r)

595 V

MPP voltage range (U_{mpp min} - U_{mpp max})

150 - 800 V

Usable MPP voltage range

150 - 800 V

Number of DC connections

2 + 2

Max. PV generator power (P_{dc max}) 

7,4 kWpeak

AC nominal output (P_ac,r)

3700 W

Max. output power (P_{ac max})

3700 VA

AC output current (I_{ac nom})

5,3 A

Grid connection (U_ac,r)

3~ NPE 400/230, 3~ NPE 380/220 V

AC voltage range (U_min - U_max)

150 - 280 V

Frequency (f_r)

50 / 60 Hz

Frequency range (f_min - f_max)

45 - 65 Hz

Total harmonic distortion

< 3 %

Power factor (cos φ_ac,r)

0,85 - 1 ind,/cap,

Width

431 mm

Height

645 mm

Depth

204 mm

Weight

19,9 kg

Degree of protection

IP 65

Protection class

1

Overvoltage category (DC / AC) ¹⁾

2 / 3

Night-time consumption

< 1 W

Inverter design

Transformerless

Cooling

Regulated air cooling

Installation

Indoors and outdoors

Ambient temperature range

-25°C - +60°C

Permitted humidity

0 - 100 %

Max. altitude ²⁾

2,000 m / 3,400 m

DC connection technology

4x DC+ and 4x DC- screw terminals 2.5 - 16 mm² (16 mm² without ferrules)

AC connection technology

5-pin AC screw terminals 2.5 - 16 mm² (16 mm² without ferrules)

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, G83/2, UNE 206007-1, SI 4777, CEI 0-21, NRS 097

Interference emission class

B

Max. efficiency (PV - grid)

98 %

European efficiency (ηEU)

96,9 %

η at 5% P_ac,r ³⁾

81,6 / 87,8 / 82,8 %

η at 10% P_ac,r ³⁾

87,9 / 93,6 / 90,5 %

η at 20% P_ac,r ³⁾

91,9 / 96,0 / 94,1 %

η at 25% P_ac,r ³⁾

92,9 / 96,6 / 95,2 %

η at 30% P_ac,r ³⁾

93,5 / 97,0 / 95,8 %

η at 50% P_ac,r ³⁾

94,6 / 97,7 / 96,8 %

η at 75% P_ac,r ³⁾

95,0 / 97,9 / 97,4 %

η at 100% P_ac,r ³⁾

95,1 / 98,0 / 97,5 %

MPP adaptation efficiency

> 99,9 %

DC insulation measurement

Yes

Overload behaviour

Operating point shift, power limitation

DC disconnector

Yes

DC Reverse polarity protection

Yes

WLAN / Ethernet LAN

Fronius Solar.web, Modbus TCP SunSpec, Fronius Solar API (JSON)

6 inputs and 4 digital inputs/outputs

Interface to ripple control receiver

USB (type A socket) ⁴⁾

Data logging, inverter update via USB flash drive

2x RS422 (RJ45 socket) ⁴⁾

Fronius Solar Net

Signalling output ⁴⁾

Energy management (floating relay output)

Datalogger and web server

Integrated

External input ⁴⁾

S0 meter connection / Evaluation of overvoltage protection

RS485

Modbus RTU SunSpec or meter connection