Fronius Symo UL

The flexible inverter for commercial systems.

The Fronius Symo inverter series has been specially developed for the demands of the North American market. Available in power categories from 10 to 24 kW, the transformerless device is the perfect three-phase inverter for commercial systems of any size. With a high system voltage, wide input voltage range and two MPP trackers, it guarantees maximum flexibility in system design. A WLAN or Ethernet internet connection as standard plus easy integration of third-party components make the Fronius Symo one of the most communicative inverters on the market. Standard equipment also includes a built-in arc detector (AFCI = Arc Fault Circuit Interrupter), in keeping with all other North American SnapINverters.

Product details

Technical Data

Input Data

Number of MPP trackers	1
Recommended PV Power (kWp)	12,0 - 19,5 kWp
Max. usable input current	50 A
Max. usable input current total (MPPT1 + MPPT2)	50 A
Max. array short circuit current (1.5 * Imax)	75 A
Nominal input voltage	325 V
DC input voltage range (U_{dc min} - U_{dc max})	325 - 1000 V
MPP Voltage Range	325 - 850 V
Max. input voltage (U_{dc max})	1000 V
Integrated DC string fuse holders	6- and 6+

Output Data

Max. output power 480 V	NA
Max. output power 240 V	NA
Max. output power 208 V	15 kVA
Output configuration	3~ NPE 208/220 V
Frequency range	45 - 65 Hz
Frequency	60 Hz
Power factor range	0 - 1 ind./cap.
Max continuous output current 480 V	NA
Max. continuous output current 240 V	NA
Max. continuous output current 208 V	41,6 A
OCPD/AC breaker size 480 V	NA
OCPD/AC breaker size 208 V	60 A
Max. efficiency	97,3 %
CEC efficiency 480 V	NA
CEC efficiency 240 V	NA
CEC efficiency 208 V	96,5 %

General Data

UL safety standards & network regulations	UL 1741-2015, UL 1998, UL 1699B Issue 2-2013
Dimension / width	511 mm
Dimension / height	724 mm
Dimension / depth	226 mm
Weight	35,52 kg
Degree of protection	NEMA 4X
Night-time consumption	< 1 W
Inverter design	Transformerless
Cooling	Variable speed fan
Ambient Temperature Range	-40°C - +60°C
Maximum Relative Humidity	0 - 100 %
Max. altitude	2000 m (6560 ft) with a max. input voltage of 1000 V / 3400 m (11160 ft) with a max. input voltage of 850 V
Certificates and compliance with standards	UL 1741-2010, UL1998 (for functions: AFCI and isolation monitoring), IEEE 1547-2003, IEEE 1547.1-2008, ANSI/IEEE C62.41, FCC Part 15 A & B, NEC Article 690, C22. 2 No. 107.1-01 ( September 2001), UL1699B Issue 2 -2013, CSA TIL M-07 Issue 1 -2013
DC connection technology	6x DC+ and 6x DC- screw terminals for copper (solid / stranded / fine stranded) or aluminium (solid / stranded)
AC connection technology	Screw terminals 14-6 AWG
Interference emission class	B

Protection Devices

DC reverse polarity protection	Yes
Anti islanding	Internal in accordance with UL 1741-2005, IEEE 1547-2003 and NEC
Over temperature protection	Output power derating / Active cooling
AFCI	Yes
Rapid shutdown compliant	Yes (according to NEC 2014)
Ground fault protection with isolation monitor interrupter	Yes
DC disconnector	Yes

Interfaces

USB (type A socket)	Datalogging and inverter update possible via USB
2x RS422 (RJ45 socket)	Fronius Solar Net
Wi-Fi / Ethernet / Serial / Datalogger and webserver	Wireless standard 802.1 1 b/g/n / Fronius Solar.web, SunSpec Modbus TCP, JSON / SunSpec Modbus RTU - Available with the Fronius Datamanager 2.0 Card only
6 inputs and 4 digital I/Os	Load management signaling, multipurpose I/O - Available with the Fronius Datamanager 2.0 Card only

SnapINverter technology

The SnapINverter generation of inverters features a simple, standardised mounting system, making installation and maintenance easier than ever. A special feature in the design of the device is that the connection area is separate from the power stage set compartment, with both being installed separately. The remarkably light connection area and all its cabling is fitted to the wall first, followed by the power stage set. The innovative hinged system makes installation and servicing extremely user-friendly. The inverter is simply placed in the wall bracket and then secured. This means that it is not necessary to remove the entire inverter for servicing, just the power stage set. All the cabling remains in place.

Integrated data communication

We are the first inverter manufacturer to offer a data communication package with fully integrated datalogging, WLAN, Ethernet, energy management, web server and a range of interfaces. The inverter is connected to the internet by network cable or WLAN - without additional cabling - and grants you the perfect overview of how the PV system is operating. Connection to third-party components is provided by means of interfaces such as Modbus TCP SunSpec, Modbus RTU SunSpec or Fronius Solar API (JSON). The open interfaces can also be operated in parallel to the Fronius Solar.web.

SuperFlex Design

The Fronius SuperFlex Design is an ingenious combination of technical performance attributes that make designing your PV system not only extremely simple, but also incredibly flexible. The key performance factors of the SuperFlex Design are two MPP trackers, together with a high system voltage and wide DC input voltage range. Every DC input, and therefore every MPP tracker, is able to accommodate the entire nominal output of the inverter. Regardless of whether the inverter has to cope with different roof orientations, shading of one or two strings, or the use of residual modules: a Fronius inverter featuring integrated SuperFlex Design will satisfy every conceivable operational PV system planning scenario using just a single inverter model.

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. They 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 if grid parameters exceed the thresholds. Fronius inverters therefore help to guarantee the yield of a PV system. Furthermore, where feed-in limits are imposed, Fronius inverters can provide dynamic feed-in control with self-consumption taken into account. Just connect the meter and set the feed-in limit!

Arc Fault Circuit Interruption Integrated

The Fronius Arc Fault Circuit Interruption (AFCI) makes each inverter NEC 2011 compliant and maintains some of the most civilized, integrated technology available today. Ensuring the utmost safety, AFCI shuts down the inverter in the event of an arc fault.

Active Cooling

Active cooling technology relies on one or more fans, which not only avoid hot spots, but also regulate the air circulation inside the inverter, thus keeping the temperature of the power electronics low. This has a positive effect on the service life of the devices, optimises yields and reduces costs. At Fronius, active cooling is supplied as standard in all devices.