Sunways NT 10000 User manual

English EN
User Manual
Sunways Solar Inverter
NT 10000, NT 11000, NT 12000

2NT 10000...NT 12000

NT 10000...NT 12000 I

Impressum
All rights reserved
© Copyright by:
Sunways AG
Photovoltaic Technology
Macairestraße 3 - 5
D-78467 Konstanz
Phone: [phone]
Fax: [phone]
EMail: [email protected]
Internet: www.sunways.de
This user manual may only be reprinted or copied in whole or in part with the express, written approval of Sun-
ways AG. Any type of reproduction, distribution or storage on data carriers in any form and of any kind not au-
thorised by Sunways AG represents a violation of the applicable copyright laws and will be prosecuted. We
reserve the right to make technical changes which serve to improve the unit, or which increase the safety stan-
dard – even without separate prior notice.
Publisher responsible for the content: Sunways AG
This user manual contains products and product names which are registered trademarks. The mention of pro-
ducts and product names is used only for information purposes and does not represent product misuse. The pas-
sage referring to these products in this user manual does not represent original documentation of the respective
product.

Introduction
NT 10000...NT 12000 III
Introduction
Thank you for purchasing an NT series Solar Inverter from Sunways, an innova-
tive, high-quality product with unique features and consistently high efficiency.
This Solar Inverter is equipped with HERIC®topology and enables operation
with a large number of solar modules and – as accustomed from Sunways – wi-
thout the use of a transformer.
This user manual contains instructions for using the Sunways Solar Inverter and
explains its functionality. Information is provided on safety, installation, com-
missioning, operation and system monitoring.
Please follow the safety instructions carefully to ensure increased safety at the
operating site of the Solar Inverter.

Introduction
IV NT 10000...NT 12000

V
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III
1 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.3 Integration into solar system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.4 Module description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.5 Delivery Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 General safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Explanation of symbols and warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Basic safety measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 Safety concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Mechanical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Electrical installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3 Installing the communication equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.1 Connecting and disconnecting Solar Inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.2 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.2 System monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6.3 Sunways Browser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
A Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
A.1 Drilling template for the wall bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
A.2 General liability disclaimer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

VI

Product description
NT 10000...NT 12000 1
1 Product description
1.1 Intended use
The Sunways NT Solar Inverter is the link between your solar generator and the
public power grid. The energy from the connected solar generator is converted
to grid-compliant AC current and fed into the grid.
Solar modules which require earthing of the negative or positive terminal can-
not be operated with the NT Solar Inverter. If in doubt, always ask your module
manufacturer about a release!
1.2 Functional description
Conversion from direct into al-
ternating current
The NT Solar Inverter converts the direct current produced by the solar genera-
tor into alternating current. The alternating current is then fed into the public
power grid as a three-phase current.
Operating and display ele-
ments
Various interfaces are available for system configuration and monitoring:
Control panel (LCD display and keyboard) for displaying operating and status
values or for inputting system parameters
Operating LED
Integrated web server for display and configuration via a web browser
Interfaces Bus interface for connecting an analogue modem, ISDN modem or GSM/
GPRS modem
Ethernet interface for connecting a PC or for integration in existing networks
CAN bus interface for interconnecting several Solar Inverters
S0 pulse output for controlling large displays
Alarm relay for realising simple monitoring locally
Interface for connecting an irradiance and temperature sensor
Data logging The NT Solar Inverter offers internal data logging for recording and saving sys-
tem data:
5-minute mean values of voltages, currents, output, temperature and irradi-
ance (if sensor is installed)
5-minute, daily, monthly and annual energy yield values
5-minute maximum and minimum values for AC output, irradiance, system
output
Memory for malfunction messages
Grid monitoring The NT Solar Inverter assumes the task of grid monitoring for the protection of
the unit and persons. In case of abnormal grid conditions, feeding is immedia-
tely interrupted and the Solar Inverter disconnects from the grid by triggering
the grid relay.

Product description
2NT 10000...NT 12000
Functions resulting from the
German Renewable Energy Act
and the Medium- and Low-Vol-
tage Directive
The Solar Inverter hardware already meets the requirements of the new Medi-
um- and Low-Voltage Directive and will support all functions via software up-
date by the end of the transitional period.
The output control through the PSC required according to the German Renewa-
ble Energy Act can be realised via the optional CAN power control box.
Solar Inverter configuration The basic configuration of the NT Solar Inverter is shown in the block diagram.
The solar generator voltage connected to the inverter input is converted to al-
ternating current by the high-efficiency HERIC®inverter. A 5-core AC connec-
tion is used.
1.3 Integration into solar system
Solar generator configuration The technical data of the selected solar generator must match the Solar Inverter
specification (see Technical Data). Incorrect dimensioning can lead to reductions
in the yield and to destruction of the unit.
The Sundim design program from Sunways can be used for this purpose. Sun-
ways Sundim can be found on the enclosed CD-ROM or on our website at http:/
/www.sunways.eu/de/.
Be sure to take the following points into account before planning your system:
Watch the celestial alignment of the modules. In Central Europe a maximum
yield is achieved with a module tilt of 30° to the horizontal and direct south
orientation of the solar generator
field.
=
~
L1
L2
L3
PE
N
L1 L2 L3 PE N
–
+DC+
DC–
HERIC® inverter
Solar generator 2
Control andmonitoring
Solar generator 1
Solar generator 3
+
+
–
–
DC+
DC–
DC+
DC–
Grid

Product description
NT 10000...NT 12000 3
The cell output decreases as the module temperature increases. Install your
solar generator with sufficient ventilation at the rear.
Check your solar generator approx. every three years for soiling. This occurs
especially on the lower edge of the modules and forms a haze that cannot
be washed off even by heavy rain. Yield reduction can be prevented by
cleaning the modules with a wet cloth or a brush.
Avoid shading of individual modules or solar cells in your system. This can
lead to major reductions in yield.
Standard components of a so-
lar system
Depending on the recommendations of your PV planning expert, your PV sys-
tem consists of the following components:
1 Solar generator
2 Solar Inverter with integrated DC
load break switch
3 Mains fuse and energy meter
Options
4 Irradiance sensor with integrated
temperature sensor
5 PC for monitoring system
6largedisplay
14
5
2
3
6
DC
AC

Product description
4NT 10000...NT 12000
1.4 Module description
1Fan
2 Control panel with LCD display,
operating LED and console
3 DC Load Break Switch
4 DC terminals
5 Communication interfaces
6 Type label
7 AC connection
1.5 Delivery Scope
The delivery consists of:
Sunways NT series Solar Inverter
Wall bracket
3 pairs of Tyco Solarlok plug-in connectors
AC connector
CAN terminating resistor connector (connected)
Ethernet cable, 2 m (CAT 5e, 1:1)
Warranty registration
SETUP - quick reference guide
CD-ROM, including Manual, Sunways Sundim design program, product and
service information
530
840
210
2
34 5 7
6
1

Product description
NT 10000...NT 12000 5
Checking delivery Before shipment our products are checked for proper condition. Despite care-
ful, recyclable packing, transport damage may occur, for which the transport
company is generally responsible.
Please check the delivered Solar Inverter thoroughly.
Should you discover damage to the packing or the Solar Inverter, please inform
the transport company immediately. Your specialist dealer will be happy to pro-
vide assistance if required. Any damage report must be received by the trans-
port company in writing no later than seven days after receipt of the goods.

Product description
6NT 10000...NT 12000

Safety precautions
NT 10000...NT 12000 7
2 Safety precautions
2.1 General safety precautions
Follow the instructions in the
operating manual.
Safe handling and trouble-free operation of the NT Solar Inverter requires
knowledge of the basic safety precautions.
This user manual contains the most important information for operating the
system safely.
Each person concerned with the installation, commissioning, maintenance and
operation of the Solar Inverter must have read and understood the entire user
manual, and in particular the chapter entitled Safety Precautions.
In addition, the rules and regulations for accident prevention applicable for the
operating site/plant must be observed.
Risks associated with handling
the NT Solar Inverter
The Solar Inverter has been built in accordance with state-of-the-art technology
and the recognised safety rules and may only be used
for its intended purpose and
in safe condition.
Improper use may lead to dangers to the life and limb of the user or others, or
can adversely affect the system or other property.
In case of malfunctions which can impair safety, the system must be shut down
immediately and secured against being switched on again. The malfunction
must then be eliminated immediately.
Warranty and liability The General Terms and Conditions of Sale and Delivery of Sunways AG always
apply. Warranty and liability claims for injuries and damage shall not be accep-
ted if they are due to one or more of the following causes:
Improper use of the Solar Inverter
Improper installation, commissioning, operation and maintenance
Operation of the Solar Inverter with defective and/or non-operational safety
and protective equipment
Failure to observe the information in the user manual regarding installation,
commissioning, operation and maintenance
Unauthorised modifications
Inadequate monitoring of wearing parts
Improper repairs
Emergencies caused by external influence or force majeure
Opening the cover and removing the safety seal without prior permission
from Sunways AG

Safety precautions
8NT 10000...NT 12000
2.2 Explanation of symbols and warnings
The following warnings and symbols are used to help you quickly understand
this manual and safely use the Solar Inverter.
Warnings used in this user ma-
nual
DANGER
This symbol indicates an immediate danger which will result in death, injury or
serious damage if the applicable safety regulations are not followed.
DANGER
Danger of death through electric shock!
This symbol indicates an immediate danger from electric shock which will result
in death, injury or serious damage if the applicable safety regulations are not
followed.
CAUTION
CAUTION
This symbol indicates an immediate danger which can result in damage if the
applicable safety regulations are not followed.
Symbols used in this user ma-
nual
NOTE
Information
This symbol indicates important information which contributes to a better un-
derstanding of the Solar Inverter.
Warnings and symbols on unit The following warnings on the housing of the Solar Inverter point out dangers.
Always observe the warnings exactly.
This symbol indicates that the user manual must be read and understood before
putting the unit into operation.
Hot surface! The housing can heat up during operation.
Always disconnect the unit from the mains supply and the PV generator before
opening the cover. The unit still carries life-threatening voltage for approx. five
minutes internally and at the connection terminals of the PV generator fol-
lowing disconnection from the PV generator. The energy storage capacitors are
not completely discharged until after this time. You must wait at least five mi-
nutes after disconnecting the unit from the mains supply and from the PV ge-
nerator before opening the unit.

Safety precautions
NT 10000...NT 12000 9
WARNING
High leakage currents. Be sure to make an earthing connection before connec-
ting the power supply circuit (AC system).
2.3 Basic safety measures
Electrical work on the Solar Inverter must be conducted by a qualified electrici-
an while observing the VDE regulations, national and other regulations!
The Solar Inverter may only be opened by persons who are authorised by Sun-
ways AG.
When circuit breakers are tripped, the cause of the fault must be determined
and eliminated before returning the unit to operation.
Check electrical equipment regularly.
Retighten any loose connections.
Replace damaged lines/cables immediately.
2.4 Safety concept
The following parameters are monitored and displayed continuously and simul-
taneously by the inverter controller:
DC overvoltage
Overvoltage L1, L2, L3
Undervoltage L1, L2, L3
Over-/underfrequency L1, L2, L3
Surge error (brief overvoltage L1, L2, L3)
DC share in AC current
AFI residual current
Overtemperature of heat sink
When a malfunction occurs, feeding is immediately interrupted and the Solar
Inverter disconnects from the grid by triggering the mains relay.
The potential-free alarm relay is activated.
If a residual current occurs on the DC side, only the affected power unit switches
off. The same applies in th event of an insulation fault: Only the power unit in
which the fault occurred switches off. The other power units continue operating
normally.
Warning! High leakage current,
earth connection essential before
connecting supply.

Safety precautions
10 NT 10000...NT 12000
In addition, the following protective equipment in accordance with overvoltage
category III is provided on the grid and the solar generator side:
Grid-side varistors
These protect the power semiconductors in case of high-energy, short-term
voltage peaks in the grid and dissipate the energy in the choke in case of a
grid disconnection.
Generator-side varistors
Varistors offer protection against atmospheric overvoltages (e.g. caused by
remote strikes during thunderstorms).

Technical data
NT 10000...NT 12000 11
3 Technical data
Model NT 10000 NT 11000 NT 12000
Article no. SI310NT0C SI311NT0C SI312NT0C
DC input
Rated DC output 10500 W 11550 W 12600 W
Maximum DC current 11.0 A per MPP input 11.5 A per MPP input 12.8 A per MPP input
Nominal DC voltage 340 V
MPP voltage range 340 V…750 V
Maximum DC voltage 900 V
Number of DC connections per MPP
tracker
1 x Tyco Solarlok
Number of MPP trackers 3
AC output
Rated AC output 10000 W 11000 W 12000 W
Maximum AC output 10000 W 11000 W 12000 W
Nominal AC current 14.5 A per phase 16.0 A per phase 17.4 A per phase
Maximum AC current 16.0 A per phase 17.5 A per phase 19.0 A per phase
Nominal frequency 50 Hz
Frequency range 47.5 Hz…50.2 Hz (according to DIN VDE 0126-1-1)
Grid voltage 400 V
AC voltage range -20% to +15% (according to DIN VDE 0126-1-1)
Distortion factor < 1%
Power factor (Cos Phi) 1 or configurable between -0.9 and +0.9
Grid voltage monitoring three-phase (according to DIN VDE 0126-1-1)
Earth fault protection RCD (according to DIN VDE 0126-1-1)
Insulation, frequency and DC cur-
rent monitoring
integrated according to DIN VDE 0126-1-1
Required phases for grid connec-
tion
3 (L1, L2, L3, N, PE)
Number of feed-in phases (230 V
single-phase)
3
Performance data
Stand-by consumption 9 W
Night-time consumption ~0 W
Maximum efficiency 97.6% 97.6% 97.6%
Max. European efficiency 97.3% 97.2% 97.2%
MPP efficiency (static) > 99%
Circuit type HERIC®topology, transformerless

Technical data
12 NT 10000...NT 12000
Other features
DC switch according to
IEC 60947-1/3
integrated
Grid-connection fuse layout 3 x 25 A
Data interfaces Ethernet, CAN, RS485, potential-free signalling relay, S0, modem
Sensor interfaces irradiance, temperature
Display LCD dot matrix, backlit, 128 x 64 pixels
System monitoring Automatic alarms via e-mail, Sunways Browser, Sunways Portal
IP rating according to IEC 60529 IP 54
Max. relative humidity 95%
Cooling Forced ventilation via external fans, temperature-controlled
Ambient temperature -25°C to 50 °C (at full
load)
-25°C to 45°C (at full
load)
-25°C to 40 °C (at full
load)
Overload characteristics Working point adjustment
Dimensions (height x width x
depth)
84 x 53 x 21 cm
Weight 31 kg
Installation type Wall installation
Noise level < 60 dB (A)
Warranty
Standard warranty 5 years
Warranty extension to 10 years Art. No. SV101020A
Warranty extension to 15 years Art. No. SV101050A
Warranty extension to 20 years Art. No. SV101080A
Warranty extension to 25 years Art. No. SV101110A
Certificates CE, DIN VDE 0126-1-1
Model NT 10000 NT 11000 NT 12000
Article no. SI310NT0C SI311NT0C SI312NT0C