Fronius Symo Series Installation Instructions Manual
Grid-connected inverter
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Also See for Symo Series:
- Service manual & spare parts list (128 pages) ,
- Installation instructions manual (68 pages) ,
- Installation instruction (64 pages)
Table of Contents
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Summary of Contents for Fronius Symo Series
- Page 1 / Perfect Charging / Perfect Welding / Solar Energy Installation instructions Fronius Symo 10 - 20 kW Fronius Eco 42,0426,0175,EN 027-11102021 Fronius prints on elemental chlorine free paper (ECF) sourced from certified sustainable forests (FSC).
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Page 3: Table Of Contents
String fuses Fronius Eco - string fuses Connection variants on multi-MPP and single-MPP tracker inverters General Multi MPP tracker - Fronius Symo -M inverter Single MPP tracker - Fronius Eco inverter Connecting solar module strings to the inverter Safety General comments regarding solar modules... - Page 4 Tightly sealing the conduits Seal conduits Serial Number Sticker for Customer Use Serial number sticker for customer use DC SPD option Installing the DC SPD option Circuit Diagram Cabling the DC SPD option Settings in the Basic menu DC-plug +- pair MC4 option General...
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Page 5: Installation Location And Position
Installation location and position Explanation of DANGER! safety notices Indicates immediate danger. ▶ If not avoided, death or serious injury will result. WARNING! Indicates a potentially hazardous situation. ▶ If not avoided, death or serious injury may result. CAUTION! Indicates a situation where damage or injury could occur. ▶... -
Page 6: Proper Use/Intended Purpose
Note! Fronius will not accept any costs associated with production downtimes, installer costs, etc., that may arise as the result of a detected arc and its consequences. Fronius accepts no liability for fires that can occur despite the presence of the integrated arc de- tection/extinguishing system (e.g. -
Page 7: Choice Of Location
In order to minimise the heating up of the inverter, do not expose it to direct insolation. Install the inverter in a protected location, e.g. in the vicinity of the solar modules or beneath the eaves. Fronius Symo: at an altitude of: DCmax... -
Page 8: Installation Position
Do not install the inverter in: Places where there is an increased risk of damage from farm an- imals (horses, cattle, sheep, pigs, etc.) Stables or adjoining areas Storage areas for hay, straw, chaff, animal feed, fertilisers, etc. All inverters are designed to be dust-tight. However, in areas with a heavy build-up of dust, the thermal efficiency may still be impaired by dust forming on the cooling surfaces. -
Page 9: General Comments Regarding Choice Of Location
Do not install the inverter horizontally on a vertical wall or pillar. Do not install the inverter on a vertical wall or pillar with its connection sockets facing upwards. Do not install the inverter overhanging with the connection sockets at the top. - Page 10 If the inverter is to be installed on the outer wall of a cattle shed, maintain a minimum all-round clearance of 2 m between the inverter and all ventilation and other openings in the building. The installation location must not be exposed to ammonia, corrosive vapours, salts or acids.
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Page 11: Attaching The Mounting Bracket
Attaching the Mounting Bracket Safety WARNING! Danger due to residual voltage in capacitors. This may result in an electric shock. ▶ Wait for the capacitors to discharge. The discharge time is five minutes. CAUTION! Danger due to dirt or water on the terminals and contacts of the inverter's connec- tion area. -
Page 12: Fitting The Mounting Bracket To A Wall
Lock Fitting the mount- ing bracket to a wall... -
Page 13: Installing The Mounting Bracket On A Mast Or Beam
Installing the When installing the inverter on a mast or mounting bracket support, Fronius recommends the "Pole on a mast or Clamp" kit from Rittal GmbH (order no. SZ beam 2584.000). This kit enables the inverter to be installed on round or rectangular masts with the fol- lowing diameters: Æ... -
Page 14: Do Not Warp Or Deform The Mounting Bracket
Do not warp or Note! When fitting the mounting bracket to the wall, ensure that the mounting bracket deform the does not become warped or deformed. mounting bracket... -
Page 15: Connecting The Inverter To The Public Grid (Ac Side)
Connecting the inverter to the public grid (AC side) Safety WARNING! Danger due to incorrect operation and incorrectly performed work. This may result in serious injury and damage to property. ▶ Only qualified staff are authorised to commission your inverter and only within the scope of the respective technical regulations. -
Page 16: Ac Terminals
Vaseline Immediately connect the cable end to the terminal IMPORTANT!Repeat the procedure if the cable has been disconnected and is to be re- connected. AC terminals Fronius Symo Fronius Eco Ground conductor / earthing L1-L3 Phase conductor Neutral conductor Max. -
Page 17: Connecting The Inverter To The Public Grid (Ac)
IMPORTANT! The PE ground conductor of the AC cable must be laid in such a way that it is the last to be disconnected in the event that the strain-relief device should fail. This can be ensured, for example, by making it somewhat longer and by laying it in a loop. Fronius Symo... - Page 18 With the Fronius Eco, the three phases and the neutral conductor must be passed through a ferrite ring. The ferrite ring is supplied with the inverter. The ground conductor (PE) must not be passed through the ferrite ring. Fronius Eco...
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Page 19: Maximum Fuse Rating On Alternating Current Side
Maximum fuse rating on alternat- ing current side Inverter Phases AC output Maximum output overcur- rent protection Fronius Symo 10.0-3-M 10,000 W C 80 A Fronius Symo 12.0-3-M 12,000 W C 80 A Fronius Symo 12.5-3-M 12,500 W C 80 A Fronius Symo 15.0-3-M... - Page 20 us recommends that a residual-current circuit breaker that is suitable for frequency con- verters should be used.
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Page 21: String Fuses
Make sure that the DC side is de-energised before carrying out any work on the in- verter fuse holder. String fuses are used in the Fronius Eco to provide additional protection for the solar modules. The short circuit current I and the maximum series string fuse data (e.g. - Page 22 Replacing fuses: CHECK VALUES! Lock...
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Page 23: Connection Variants On Multi-Mpp And Single-Mpp Tracker Inverters
There are 3 terminals for DC+ per MPP tracker. In total there are six terminals for DC-. In the case of inverters with single MPP trackers like the Fronius Eco, there is 1 DC input (MPP tracker) available. The number of PV modules per string connection should be the same. - Page 24 DC Con Kit 25 The Fronius DC Con Kit 25 (4,251,015) can be used to connect a solar module string with a cross-section of up to 25 mm² to the inverter. Set the MPP tracker 2 to "Off" during initial commissioning.
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Page 25: Single Mpp Tracker - Fronius Eco Inverter
25: 5.5 Nm / 50 lb-in DC Con Kit 35 The Fronius DC Con Kit 35 (4,251,029) can be used to connect a PV string with a cross- section of up to 35 mm² to the inverter. Set the MPP tracker 2 to "Off" during initial commissioning. - Page 26 DC+2 DC Con Kit 25 The Fronius DC Con Kit 25 (4,251,015) can be used to connect a solar module string with a cross-section of up to 25 mm² to the inverter. By using the DC Con Kit 25, the DC strings of the connected DC lines are equally distributed to both inputs.
- Page 27 By using the DC Con Kit 35, the DC strings of the connected DC lines are di- vided equally between both inputs. PV cable connection torque DC Con Kit 35: 3 PV cable connection torque DC Con Kit 35: 3 Nm...
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Page 28: Connecting Solar Module Strings To The Inverter
Danger due to overloading. This may result in damage to the inverter. ▶ Fronius Symo: The maximum amperage when connecting to a single DC terminal is 33 A. ▶ Fronius Eco: The maximum amperage when connecting to a single DC terminal is 15 A. -
Page 29: General Comments Regarding Solar Modules
The temperature coefficients on the solar modules data sheet must be observed. More exact values for dimensioning the solar modules can be provided by suitable calculation programs, like the Fronius Solar.configurator (which can be downloaded from http://www.fronius.com). Note! Before connecting up the solar modules, check that the voltage for the solar mod- ules specified by the manufacturer corresponds to the actual measured voltage. -
Page 30: Connecting Aluminium Cables
When installed between 2501 and 3000 m above sea level: 900 V ▶ When installed between 3001 and 3400 m above sea level: 850 V ▶ the Fronius Symo must not be installed at an altitude exceeding 3400 m above sea level ▶ Fronius Eco: ▶... -
Page 31: Connecting The Solar Module Strings To The Inverter
(e.g. if there are 2 DC cables, then break out 2 recesses). strings to the in- verter Note! Fronius Eco: check the string fuses used (type and rating) before connecting the solar module strings to the inverter. 2.5 - 10 mm²... - Page 32 Note! Observe the torque values marked on the side underneath the terminals.
- Page 33 If DC cables are laid over the shaft of the DC main switch or across the connection block of the DC main switch, they may be damaged when the inverter is swung in or they may even prevent the inverter from being swung in.
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Page 34: Data Communication
To cater for this eventuality, a suitable blanking cover (item number 42,0405,2094) is available from Fronius as an option. IMPORTANT! If data communication cables are wired into the inverter, observe the fol- lowing points:... - Page 35 IMPORTANT! Observe the ESD guidelines when handling option cards. IMPORTANT! Only one Fronius Datamanager in master mode is permitted per Fronius Solar Net ring. Switch any other Fronius Datamanagers to slave mode or remove them. Seal off the unoccupied option card slot by replacing the cover (item number 42,0405,2094);...
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Page 37: Attaching The Inverter To The Mounting Bracket
Attaching the inverter to the mounting bracket Attaching the in- WARNING! verter to the mounting bracket Danger from inadequate ground conductor connection. This can result in serious injury and damage to property. ▶ The housing screws provide a suitable ground conductor connection for earthing the housing and must NOT be replaced by any other screws that do not provide a reli- able ground conductor connection. -
Page 40: Attaching The Metall Bracket
Attaching the With the Fronius Eco, a metal bracket in- metall bracket cluded in the scope of delivery must also be fitted to the device. This metal bracket is required for compliance with EMC (elec- tromagnetic compatibility) regulations. -
Page 41: Starting For The First Time
Starting for the first time Starting the in- WARNING! verter for the first time Danger due to incorrect operation and incorrectly performed work. This can result in serious injury and damage to property. ▶ Only qualified personnel are authorised to commission your inverter and only within the scope of the respective technical regulations. - Page 42 * Country setup examples The available country setups may change during a software update. Therefore, the following list may not ex- actly match the display on the inverter. 50Hz International 50 Hz DE2P Deutschland (> 4,6 kVA) - Italia ≤ 11,08 kVA 2019 60Hz International 60 Hz cosPhi(P) 0,9...
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Page 44: Notes Regarding Software Updates
Notes regarding software updates Notes regarding If the inverter is supplied with a USB flash software updates drive, the inverter software must be up- dated as soon as the inverter has been commissioned: Plug the USB flash drive into the data communication area of the inverter Open the Setup menu Select the "USB"... -
Page 45: Usb Stick As A Data Logger And For Updating Inverter Software
DALO.fld log file: A log file for reading the data in the Fronius Solar.access software. Further details on the Fronius Solar.access software can be found in the "DATCOM Details" operating instructions at http://www.fronius.com DATA.csv log file: A log file for reading the data in a spreadsheet program (e.g.: Microsoft® Excel) -
Page 46: Data Volume And Storage Capacity
Structure of the CSV file: Inverter no. Inverter type (DATCOM code) Logging interval in seconds Energy in watts per second, relative to the logging interval Inductive reactive power Capacitive reactive power Average values during the logging interval (AC voltage, AC current, DC voltage, DC current) Additional information Data volume and... -
Page 47: Buffer Memory
Datamanager 2.0 Operating Instructions, section "Setting and displaying the menu items", "Viewing and adjusting parameters in the DATCOM menu item"). On the Fronius Eco or Fronius Symo 15.0-3 208, the buffer memory also functions with just a DC supply. Suitable USB... -
Page 48: Usb Stick For Updating The Inverter Software
USB symbol on the inverter display, e.g. in display mode 'NOW': If the inverter detects a USB flash drive, the USB symbol will appear in the top right corner of the display. When inserting a USB flash drive, check whether the USB symbol is displayed (it may also flash). -
Page 49: Notes Regarding Maintenance
Maintenance Note! When installed outdoors in a horizontal position: once a year, check that all screw joints are tight! Maintenance and servicing may only be carried out by Fronius-trained service techni- cians. Cleaning Clean the inverter as required with a damp cloth. -
Page 50: Australian Conduits
Australian Conduits Tightly sealing Ensure that the conduits are tightly sealed. the conduits Seal conduits NOTE! Condensation within the conduits can damage the inverter or components of the photovoltaic systems. To avoid undesirable air circulation and condensation in the conduits: ▶... -
Page 51: Serial Number Sticker For Customer Use
Serial Number Sticker for Customer Use Serial number The serial number of the inverter is located sticker for cus- on the rating plate on the bottom of the in- tomer use verter. Depending on the installation position of the inverter, the serial number can be diffi- cult to access or read, e.g. -
Page 52: Dc Spd Option
DC SPD option Installing the DC Surge protection (DC SPD option) can be retrofitted in the inverter. Depending on the SPD option device type, one surge protective device (single MPP tracker) or two surge protective devices (multiple MPP tracker) must be installed in the inverter. The surge protective device must then be fully cabled (see chapter Cabling the DC SPD option... -
Page 53: Cabling The Dc Spd Option
Cabling the DC The DC SPD option can be ordered built-in or retrofitted at a later date. The cabling de- SPD option scribed below must be carried out for both variants. The M16 cable gland is included in the scope of delivery. DC SPD - M option DC SPD - S option... -
Page 54: Settings In The Basic Menu
Settings in the Basic menu Warning is shown on the display. M o d e o f o p e r a t i o n T r i g g e r r e s p o n s e C o n n e c t i o n t y p e The inverter is switched off. - Page 55 N/C (normally closed contact) M o d e o f o p e r a t i o n T r i g g e r r e s p o n s e C o n n e c t i o n t y p e N/O (normally open contact)
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Page 56: Dc-Plug +- Pair Mc4 Option
DC-plug +- pair MC4 option General The inverter can be ordered with the DC- plug +- pair MC4 option. Unused connections must be covered with a cover plate. The cover plates can be ordered using the following item numbers: MC30A DC+: 43,0003,0880 MC30A DC-: 43,0003,0879... - Page 57 The scope of delivery for the inverter with the DC-plug +- pair MC4 option includes a label with a cable overview. This label can be positioned on the inverter in a suitable place.
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