SMA SMC 6000TL Installation
EN
PV Inverter
SUNNY MINI CENTRAL 6000TL / 7000TL / 8000TL
Installation Guide
SMC6-8TL-IEN101040 | IME-SMCTL_60_70_80 | Version 4.0
SMA Solar Technology AG Table of Contents
Table of Contents
1 Notes on this Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1 Scope of Validity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Target Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.4 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Appropriate Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3 Explanation of Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.3.1 Symbols on the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.3.2 Symbols on the Type Label . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3 Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.1 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2 Identifying the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2 Selecting the Mounting Location. . . . . . . . . . . . . . . . . . . . . . . . 16
4.3 Mounting the Inverter with Wall Mounting Bracket . . . . . . . . . 18
5 Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1 Overview of the Connection Area . . . . . . . . . . . . . . . . . . . . . . 21
5.1.1 Exterior View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.1.2 Interior View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.2 Connection to the public grid (AC). . . . . . . . . . . . . . . . . . . . . . 23
5.2.1 Conditions for the AC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2.2 Connecting the Inverter to the Public Grid (AC) . . . . . . . . . . . . . . . . . . . . . . 26
5.2.3 Additional Grounding of the Enclosure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Installation Guide SMC6-8TL-IEN101040 3
Table of Contents SMA Solar Technology AG
5.3 Setting the Display Language . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.4 Connection of the PV Generator (DC) . . . . . . . . . . . . . . . . . . . 30
5.4.1 Conditions for the DC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.4.2 Assembling the DC Plug Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.4.3 Opening the DC Plug Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.4.4 Connecting the PV Generator (DC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.5 Connection of the SMA Power Balancer . . . . . . . . . . . . . . . . . 37
5.5.1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5.5.2 Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.5.3 Testing the Functioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.6 Communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.7 Setting the Grid and Country Parameters . . . . . . . . . . . . . . . . . 45
5.7.1 Setting the Installation Country . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.7.2 Setting Stand-alone Grid Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6.1 Commissioning the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6.2 Self-Test in accordance with DK 5940, Ed. 2.2
(applies to Italy only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6.2.1 Starting the Self-Test by Tapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6.2.2 Completion of the Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7 Opening and Closing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.2 Opening the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.3 Closing the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
8 Maintenance and Cleaning. . . . . . . . . . . . . . . . . . . . . . . . 57
8.1 Checking Heat Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.1.1 Cleaning the Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.1.2 Checking the Fans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8.1.3 Cleaning the Air Grills. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
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SMA Solar Technology AG Table of Contents
8.2 Checking the Electronic Solar Switch (ESS) for Wear . . . . . . . 60
9 Failure Search. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.1 Blink Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.2 Error Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.3 Red LED is Glowing Continuously. . . . . . . . . . . . . . . . . . . . . . . 68
9.3.1 Checking the PV Generator for a Ground Fault . . . . . . . . . . . . . . . . . . . . . . 68
9.3.2 Checking the Functioning of the Varistors . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
10 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
10.1 Dismantling the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
10.2 Packing the Inverter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
10.3 Storing the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
10.4 Disposing of the Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
11 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
11.1 Sunny Mini Central 6000TL . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
11.2 Sunny Mini Central 7000TL . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
11.3 Sunny Mini Central 8000TL . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
12 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
13 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Installation Guide SMC6-8TL-IEN101040 5
Table of Contents SMA Solar Technology AG
6 SMC6-8TL-IEN101040 Installation Guide
SMA Solar Technology AG Notes on this Manual
1 Notes on this Manual
1.1 Scope of Validity
This manual describes the assembly, installation, commissioning and maintenance of the following
SMA inverters:
• Sunny Mini Central 6000TL (SMC 6000TL)
• Sunny Mini Central 7000TL (SMC 7000TL)
• Sunny Mini Central 8000TL (SMC 8000TL)
Store this manual where it can be accessed at all times.
1.2 Target Group
This manual is for qualified personnel.. The tasks described in this manual may only be performed by
qualified personnel.
1.3 Additional Information
You will find further information on special topics such as designing a line circuit breaker or the
description of the operating parameters in the download area at www.SMA.de/en.
Refer to the user manual for detailed information on operating the inverter.
Installation Guide SMC6-8TL-IEN101040 7
Notes on this Manual SMA Solar Technology AG
1.4 Symbols Used
The following types of safety precautions and general information are used in this manual:
DANGER!
"DANGER" indicates a hazardous situation which, if not avoided, will result in death or
serious injury.
WARNING!
"WARNING" indicates a hazardous situation which, if not avoided, could result in death
or serious injury.
CAUTION!
"CAUTION" indicates a hazardous situation which, if not avoided, could result in minor or
moderate injury!
NOTICE!
"NOTICE" indicates a situation that can result in property damage, if not avoided.
Information:
Information provides tips that are valuable for the optimal installation and operation of
your product.
☑ This symbol indicates the result of an action.
8 SMC6-8TL-IEN101040 Installation Guide
SMA Solar Technology AG Safety
2 Safety
2.1 Appropriate Usage
The Sunny Mini Central is a PV inverter, which converts the DC current of the PV generator to AC
current and feeds it into the public grid.
Operating Principle of a PV System with Sunny Mini Central
The Sunny Mini Central may only be operated with PV generators (modules and cabling) of
protection class II. Do not connect any sources of energy other than PV modules to the Sunny Mini
Central.
Capacitive Discharge Currents
PV modules with large capacities relative to ground, such as thin-film modules with cells on
a metallic substrate, are only to be implemented if their coupling capacity does not exceed
1400 nF.
During grid feeding, a discharge current flows from the cells to ground. The amount of
current depends on the manner in which the modules are installed (e.g. foil on metal roof)
and on the weather (rain, snow). This "normal" discharge current may not exceed 50 mA
due to the fact that the inverter would otherwise automatically disconnect from the grid as
a protective measure. For further information on this subject, see the technical information
"Capacitive Discharge Currents" in the download area at www.SMA.de/en.
Installation Guide SMC6-8TL-IEN101040 9
Safety SMA Solar Technology AG
When designing the PV system, ensure that the values comply with the permitted operating range of
all components at all times. The free design program "Sunny Design" (www.SMA.de/en/
SunnyDesign) will assist you. The manufacturer of the PV modules must have approved the modules
for use with this Sunny Mini Central unit. You must also ensure that all measures recommended by the
module manufacturer for long-term maintenance of the module properties are taken (see also
Technical Information "Module Technology", in the download area of www.SMA.de/en).
Do not use the inverter for purposes other than those described here. Alternative uses, modifications
to the inverter or the installation of components not expressly recommended or sold by SMA Solar
Technology AG void the warranty claims and operation permission.
Certified Countries
The Sunny Mini Central 6000TL / 7000TL / 8000TL (with according configuration) fulfill the
requirements specified in the following standards and directives (dated: March/2010):
• VDE 0162-1-1 (02.2006)
• C10/C11 (05.2009) *
•PPDS
• PPC (02.2006)
• RD 1663/2000 (2000) **
• SS-EN 50438
• AS4777 (2005)
• IEC utility Meeting 216
• DK 5940 Ed. 2.2 (02.2006) (only applies to SMC 6000TL-IT / 7000TL-IT / 8000TL-IT)
• Kepco guide (02.2006) (only applies to SMC 8000TL-KR)
* Only possible when the phase voltage is 220 V.
** In the event of restrictions in certain regions, contact the SMA Serviceline
SMA Solar Technology AG can preset special grid parameters for other countries / installation
locations according to customer requests, after evaluation by SMA Solar Technology AG. You can
make later modifications yourself by changing software parameters with respective communication
products (e.g. Sunny Data Control or Sunny Explorer) (see section 5.7”Setting the Grid and Country
Parameters” (page45)). To change grid-relevant parameters, you need a personal access code - the
so-called SMA Grid Guard Code. The application form for the personal access code is located in the
download area at www.SMA.de/en, in the "Certificate" category for each inverter.
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SMA Solar Technology AG Safety
2.2 Safety Precautions
DANGER!
Danger to life due to high voltages in the inverter.
• All work on the inverter must be carried out by qualified personnel only.
• T he a ppl iance is not to b e us ed b y ch ildren o r pe rso ns w ith reduced physical, sensory
or mental capabilities, or lack of experience and knowledge, unless they have been
given supervision or instruction.
• Children should be supervised to ensure that they do not play with the appliance.
DANGER!
Danger of burn injuries due to hot enclosure parts.
• Do not touch enclosure during operation.
• Only touch the lid during operation.
NOTICE!
Foreign objects or water entering the inverter can damage the device!
Once the Electronic Solar Switch has been pulled out, the inverter only provides protection
rating IP21. The inverter is then no longer protected against water and foreign objects. In
order to keep the protection rating IP65 during temporary decommissioning, proceed as
follows:
• Unlock and disconnect all DC connectors.
• Open all DC connectors and remove the wires.
• Close all DC inputs with the corresponding DC connectors and the sealing plug
provided.
• Securely attach the Electronic Solar Switch again.
Grounding the PV Generator
Comply with the local requirem ents for groundi ng the modules an d the PV generator. SMA
Solar Technology AG recommends connecting the generator frame and other electricityconducting surfaces such that there is continuous conduction and to connect them to the
ground in order to reach maximum protection for property and persons.
Installation Guide SMC6-8TL-IEN101040 11
Safety SMA Solar Technology AG
2.3 Explanation of Symbols
This chapter contains an explanation of all symbols found on the inverter and type label.
2.3.1 Symbols on the Inverter
Symbol Explanation
Operation display.
Indicates the operation condition of the inverter.
Ground fault or varistor defective.
Read section 9.3”Red LED is Glowing Continuously” (page68).
Disturbance or fault
Read section 9”Failure Search” (page61).
Tap to switch on the display light and switch to the next display message.
Electronic Solar Switch (ESS) DC load disconnection unit
• When the Electronic Solar Switch is plugged in, the DC circuit is
closed.
• To interrupt the DC circuit and disconnect the inverter securely
under load, you have to first pull out the Electronic Solar Switch
and then remove all DC plug connectors , as described in section
7.2”Opening the Inverter” (page52).
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SMA Solar Technology AG Safety
2.3.2 Symbols on the Type Label
Symbol Explanation
Beware of dangerous electrical voltage.
The inverter operates at high voltages. All work on the inverter must be
carried out by qualified personnel only.
Beware of hot surface.
The inverter can become hot during operation. Avoid contact during
operation.
Observe all documentation that accompanies the inverter.
The inverter must not be disposed of with the household waste. For more
information on disposal, see section 10.4”Disposing of the Inverter”
(page73).
CE mark.
The inverter complies with the requirements of the applicable EC
guidelines.
The inverter is transformerless.
Direct Current (DC)
Alternating current (AC)
Protection rating IP65.
The inverter is protected against penetration by dust particles and water
jets from any angle.
RAL quality mark for solar products.
The inverter complies with the requirements of the German Institute for
Quality Assurance and Labeling.
Installation Guide SMC6-8TL-IEN101040 13
Unpacking SMA Solar Technology AG
3 Unpacking
3.1 Scope of delivery
Check the delivery for completeness and any visible external damage. Contact your dealer if anything
is damaged or missing.
Object Quantity Description
A 1 Sunny Mini Central
B 1 Air grills (right / left)
C 1 Wall mounting bracket
D 1 Electronic Solar Switch (ESS) DC load disconnection unit
E 8 DC plug connectors (4 x positive / 4 x negative)
F 8 Sealing plugs for DC plug connectors
G 1 Cable gland for AC connection:
H 1 Counter nut for cable gland at AC connection
I 1 Clamping clip for additional grounding
K 2 Tooth lock washers: 1 x for cover screws (replacement),
1 x for ground connection cable terminal
L 2 Cylinder head screws (M6x16): 1 x for lid (replacement),
1 x for ground connection cable terminal
M 2 Jumper (1x for fan test 1x for the cabling of the SMA Power Balancer)
N 2 Cylinder head screws (M6x8) for securing the inverter to the wall mounting
bracket
O 1 Silicone tube for insulating the SMA Power Balancer connection cable
P 1 Installation Guide
Q 1User Manual
14 SMC6-8TL-IEN101040 Installation Guide
SMA Solar Technology AG Unpacking
Object Quantity Description
R 1 Set of documents with explanations and certificates
S 1 Supplementary sheet with inverter factory settings
3.2 Identifying the Inverter
You can identify the inverter by the type label. The type label is on the right side of the enclosure.
The serial number (Serial no.) and the type (Type / Model) of the product, as well as device-specific
characteristics are specified on the type label.
Installation Guide SMC6-8TL-IEN101040 15
Mounting SMA Solar Technology AG
4 Mounting
4.1 Safety
DANGER!
Danger to life due to fire or explosion!
Despite careful construction, electrical devices can cause fires.
• Do not mount the inverter on flammable construction materials.
• Do not mount the inverter in areas where highly flammable materials are stored.
• Do not mount the inverter in areas with a risk of explosion.
CAUTION!
Danger of burn injuries due to hot enclosure parts.
• Mount the inverter in such a way that it cannot be touched inadvertently.
CAUTION!
Risk of injury due to the heavy weight of the inverter.
• Take the inverter's weight of approx. 33 kg into account for mounting.
4.2 Selecting the Mounting Location
Consider the following points when selecting where to install:
• The installation method and mounting location must be suitable for the inverter's weight and
dimensions (see section 11”Technical Data” (page74)).
• Mount on a solid surface.
• The mounting location must at all times be clear and have safe access without the use of
additional aids such as scaffolding or lifting platforms. Any possible service actions are
otherwise limited.
• Vertical installation or tilted backwards by max. 45°.
• The connection area must point downward.
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SMA Solar Technology AG Mounting
• Never install the device with a forward tilt.
• Do not install horizontally.
• Install at eye level to allow operating modes to be read at all times.
• The ambient temperature should be below 40 °C to ensure optimal operation.
• Do not expose the inverter to direct sunlight to avoid a power reduction due to excessive
heating.
• In living areas, do not mount the unit on plasterboard walls or similar in order to avoid audible
vibrations. The inverter can make noises when in use which may be perceived as a nuisance in
a living area.
• Observe the minimum clearances to walls, other
inverters, or objects as shown in the diagram in
or der to gu ara ntee suf fic ien t heat di ssi pat ion and to
have enough space for removing the Electronic
Solar Switch.
Multiple inverters installed in areas with high ambient temperatures
There must be sufficient clearance between the individual inverters to ensure the cooling air
from the adjacent inverter flows freely.
If necessary, increase the clearances and make sure there is enough ventilation to ensure
sufficient cooling of the inverters.
Installation Guide SMC6-8TL-IEN101040 17
Mounting SMA Solar Technology AG
4.3 Mounting the Inverter with Wall Mounting Bracket
1. Mark the position of the drill holes using the wall mounting bracket and drill the holes. Use at
least 2 of the 6 holes, with one hole on the right and one on the left.
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SMA Solar Technology AG Mounting
CAUTION!
Risk of injury due to the heavy weight of the inverter.
The inverter weights approx. 33 kg.
• Attach the wall mounting bracket with the corresponding mounting material
(depending on the surface).
• U se t he s ide handles (ab ove and bel ow)
or a steel rod (maximum diameter of
30 mm) for transport and mounting. The
rod must be pushed through the
enclosure openings.
2. Secure the wall mounting bracket to the wall using
appropriate screws and washers.
3. Using the mounting hole, attach the inverter to the
rear panel of the enclosure in the wall mounting
bracket.
Installation Guide SMC6-8TL-IEN101040 19
Mounting SMA Solar Technology AG
4. Screw the inverter to the wall mounting bracket on
both sides using the screws (M6x8) provided.
Only tighten the screws hand-tight.
5. Check to ensure the inverter is firmly fastened.
6. Close the recessed grips with the air grills provided.
The air grills are marked "rechts/right" and "links/
left" on the interior for proper assignment.
The air grills prevent dirt and insects from entering
the device and, if necessary, can be reordered from
SMA Solar Technology AG (see section
13”Contact” (page85))
Optional Theft Protection
To protect the inverter against theft, the rear
panel can be secured to the wall at the bottom
using 2 single-use bolts.
The other two holes are spares.
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SMA Solar Technology AG Electrical Connection
5 Electrical Connection
NOTICE!
Electrostatic discharges can damage the inverter!
Internal components of the inverter can be irreparably damaged by static discharge.
• Ground yourself before touching a component.
5.1 Overview of the Connection Area
5.1.1 Exterior View
The following figure shows the assignment of the individual connection areas on the bottom of the
inverter.
Object Description
A DC connectors for connecting the PV strings
B Socket for connecting the Electronic Solar Switch (ESS) DC load disconnection unit
C Cable gland for optional communication via RS485 (PG16)
D Cable gland for grid connection (AC) (12 mm … 25 mm)
E Cable glands for SMA Power Balancer
Installation Guide SMC6-8TL-IEN101040 21
Electrical Connection SMA Solar Technology AG
5.1.2 Interior View
The following illustration shows the various components and connection areas of the open inverter.
Object Description
A Connection area and sockets for communication (page 44)
B Display
C Jumper for testing the fans (page 58)
D LEDs for displaying the operating modes (page 46)
E Jumper for SMA Power Balancer (page 37)
22 SMC6-8TL-IEN101040 Installation Guide
SMA Solar Technology AG Electrical Connection
Object Description
F Connections terminals for SMA Power Balancer (page 37)
G Flat connector for grounding the cable shield when connecting the SMA Power
Balancer (page37)
H Connection terminals for mains cable (AC) (page 23)
I Cable glands for the SMA Power Balancer (page 37)
K Cable gland for grid connection (AC) (page 23)
L Cable gland for communication (page 44)
M Screwing device of shield clamp for communication cable (page 44)
N DC connectors (page 30)
O Connection socket for “Electronic Solar Switch (ESS)” DC load disconnection unit
(page 30)
P Male connector for grounding the cable shield for communication (page 44)
Q Varistors (page 69)
5.2 Connection to the public grid (AC)
5.2.1 Conditions for the AC Connection
Connection requirements of the utility operator
Always observe the connection requirements of your utility operator!
Cable Sizing
The conductor cross-section should be dimensioned in a way that output losses do not exceed 1 % at
nominal power. Use "Sunny Design" (www.SMA.de/en/SunnyDesign) for this.
The maximum cable lengths relative to the conductor cross-section are shown in the following table.
Conductor crosssection
10.0 mm² 25 m 22 m 19 m
16.0 mm² 41 m 35 m 31 m
Cut line losses in half
If three inverters with symmetrical feeding are combined to form a three-phase system, the
neutral conductor is not subjected to any load, and the line losses are halved. Thus, the
maximum possible cable length is doubled.
The conductor cross-sectional area required in individual cases depends on the following factors
among others:
• Ambient temperature,
•Routing method,
•UV resistance.
Installation Guide SMC6-8TL-IEN101040 23
SMC 6000TL SMC 7000TL SMC 8000TL
Maximum cable length
Electrical Connection SMA Solar Technology AG
Cable Requirements
Position Description Value
A External diameter 12 mm … 25 mm
B Conductor cross-section 10 mm² … 16 mm²
C Strip insulation Approx. 16 mm
Load Disconnection Unit
You must install a separate line circuit breaker for each inverter in order to ensure that the inverter
can be securely disconnected under load. The maximum permissible rating is located in section
11”Technical Data” (page74).
De tai led inf orm ati on and ex amp les for the rat ing of a l ine cir cuit breaker can be found in the Technical
Information "Line Circuit Breaker" in the SMA Solar Technology AG download area at
www.SMA.de/en.
DANGER!
Danger to life due to fire.
When more than one inverter is connected to the same line circuit breaker, the protective
function of the line circuit breaker is no longer guaranteed. It can result in a cable fire or
the destruction of the inverter.
• Never connect several inverters to the same line circuit breaker.
• Comply with the maximum permissible fuse protection of the inverter when selecting
the circuit breaker.
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SMA Solar Technology AG Electrical Connection
DANGER!
Danger to life due to fire.
When a generator (inverter) and a consumer are connected to the same line circuit
breaker, the protective function of the line circuit breaker is no longer guaranteed. The
current from the inverter and the grid can accumulate to overcurrent, which is not detected
by the line circuit breaker.
• Never connect loads between the
inverter and the line circuit breaker
without protection.
• Always protect consumers separately.
NOTICE!
Damage to the inverter by using screw type fuse elements as a load
disconnection unit!
A screw type fuse element, e.g. D system (Diazed) or D0 system (Neozed) is not a load
disconnection unit, and thus may not be used as a load disconnection unit. A screw type
fuse element is only used as cable protection.
When disconnecting under load using a screw type fuse element, the inverter can be
damaged.
• U se o nly a lo ad disco nnec tin g sw itc h or a lin e ci rcu it b rea ker as a load disconnecting
unit.
Installation Guide SMC6-8TL-IEN101040 25
Electrical Connection SMA Solar Technology AG
5.2.2 Connecting the Inverter to the Public Grid (AC)
1. Check the grid voltage and compare with "V
The exact operating range of the inverter is specified in the operating parameters. The
corresponding document is available in the download area at www.SMA.de/en.
2. Switch off the line circuit breaker and secure it to prevent it from being reactivated.
3. Loosen all cover screws and remove the cover.
4. Remove tape on the AC enclosure opening
(see "D" on page 21).
5. Insert the AC screw clamp into the enclosure
opening from the outside and tighten it with the
counter nut from the inside.
6. Pull the cable through.
7. Connect L, N and the protective conductor (PE) to
the terminal blocks using a screwdriver in
accordance with the label.
To do this, the PE w ire must be 5 mm longe r th an the
L and N wires!
L and N must not be swapped.
" on the type label.
AC nom
8. Securely close the gland on the enclosure opening.
26 SMC6-8TL-IEN101040 Installation Guide
SMA Solar Technology AG Electrical Connection
9. Secure the lid with all screws and the
corresponding lock washers.
Tighten the screws with 6 Nm torque in the order
shown on the right hand side. The toothing of the
tooth lock washers must face toward the lid.
The inverter packing list includes another spare
screw and tooth lock washer.
DANGER!
Danger to life due to live lid.
The grounding of the enclosure lid is ensured by the tooth lock washers.
• Fasten the tooth lock washers for all 6 screws with the toothing facing toward the lid.
DANGER!
Danger to life due to high voltages in the inverter.
• Do not switch on the line circuit breaker until the inverter is securely closed and the
PV generator has been connected.
☑ The inverter is now connected to the public grid (AC).
Installation Guide SMC6-8TL-IEN101040 27
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