Sunways AT 2700 User manual

User Manual for
Sunways Solar Inverter
AT 5000, AT 4500, AT 3600, AT 2700

1 Operating field with LCD display, oper-
ating LED and keyboard
2 DC connections
3 DC load break switch
4 Rating plate
5 AC connection
6 Communication interfaces
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This user manual contains explanations
on using the Sunways Solar Inverter. You
will learn to recognise the many possibili-
ties of the solar inverter. Information is
provided on safety, installation, com-
missioning, operation and system
monitoring.
Please observe the safety precautions
exactly to ensure increased safety at the
operating site of the solar inverter.
Introduction
Thank you for deciding in favour of a
Sunways Solar Inverter of the AT Series!
In doing so you have purchased an inno-
vative, high-quality product with unique
equipment features and a high, constant
efficiency. This solar inverter is equipped
with HERIC®topology and innovative FP
switching, and therefore enables opera-
tion on a large number of silicon and
thin-film modules – as accustomed from
Sunways – without the use of a trans-
former.

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Imprint
All rights reserved.
© Copyright by:
Sunways AG
Photovoltaic Technology
Macairestraße 3 - 5
78467 Konstanz
Germany
This user manual may only be reprinted or copied in whole
or in part with the express, written approval of Sunways
AG. Any type of reproduction, distribution or storage on
data carriers in any form and of any kind not authorised
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 standard – 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 products
and product names is used only for information purposes
and does not represent
product misuse. The passage referring to these products in
this user manual does not represent original documenta-
tion of the respective product.

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Content
Introduction 3
1.0 Product Description 8
1.1 Proper use 9
1.2 Function description 9
Block diagram 11
1.3 Integration in solar system 12
Design of solar generator 12
Standard components of a solar
system 13
1.4 Assembly description 14
1.5 Delivery scope 15
2.0 Safety precautions 16
2.1 General safety precautions 17
2.2 Explanation of symbols and
warnings 18
Warnings and symbols in user
manual 18
Symbols 19
2.3 Basic safety measures 20
2.4 Safety concept 20
3.0 Installation 22
3.1 Mechanical installation 23
Requirements for installation
location 23
Installation 25
3.2 Electrical installation 26
Solar generator connection 26
Grid connection 33
3.3 Installing communication 39
Interface overview 39
Networking solar inverters via
CAN bus 40
Networking solar inverters via
RS485 interface 41
S0 interface 42
Connection of temperature and
irradiation sensor 43
Connecting alarm relay 44
4.0 Commissioning 46
4.1 Connecting and disconnecting
solar inverter 47
Connecting 47
Switching off 48

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4.2 Commissioning 49
Commissioning single unit 50
Commissioning several
networked units 52
Later commissioning 55
5.0 Operation 56
5.1 Operating elements 57
Operating field 57
LCD display 57
Operating LED 58
Standard screen (single unit) 59
Standard screen (system) 60
5.2 Access rights 61
5.3 Menu structure 62
Instantaneous Values – Unit 63
5.4 Overview of screen displays 63
Events – Unit 64
History – Unit 65
Information – Unit 66
Instantaneous values – Solar
system 67
Yields – Solar system 67
Events – Solar system 68
History – Solar system 68
System info – Solar system 69
Settings – General 70
Settings – Login 71
Settings – Network 72
5.4 Malfunction displays 73
6.0 System monitoring 96
6.1 General information 97
6.2 Integrated data logger 98
6.3 Direct Ethernet connection 99
6.4 Network settings on solar
inverter 100
6.5 Network settings on PC 101
6.6 Connection via an existing
Ethernet network 105
6.7 Connection via Internet 107
6.8 Connection via Sunways
Modem 108
6.9 Dialling in from a PC to solar
inverter 109
6.10 Sunways Browser 114
General information 114
Access protection 115
Overview – Menu 116
Language selection 116

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Setting date/time 117
Software update 118
Distributing software update
to networked units 119
6.11 Internet dial-in via modem 120
Modem settings 120
Email settings 122
6.12 Active alerting 124
General information 124
Alerting settings 125
6.13 Sunways portal connection 126
General information 126
Setup 127
7.0 Appendix 130
7.1 Technical data 131
7.4 General liability disclaimer 139

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1.0 Product Description

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1.1 Proper use
The Sunways AT 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-conformant AC current and fed into
the grid.
Thanks to the HERIC®topology with FP
switching, the AT Solar Inverter has a
voltage curve which corresponds to that
of a transformer unit with an earthed
negative terminal, and is generally also
recognized for operation on thin-film
modules.
Solar modules which require earthing of
the positive terminal cannot be operated
with the AT Solar Inverter. If in doubt,
always ask your module manufacturer
about a release!
1.2 Function description
Conversion from direct into alternating
current
The AT Solar Inverter converts the direct
current produced by the solar generator
into alternating current. The alternating
current is then fed into the public power
grid.
Operating and display elements
Various interfaces are available for sys-
tem configuration and monitoring:
· Operating field (LCD display and key-
board) 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

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· CAN bus interface for interconnecting
several solar inverters
· S0 pulse output for controlling large
displays
· Alarm relay for realising simple moni-
toring locally
· Interface for connecting an irradiation
and temperature sensor
Data logging
The AT Solar Inverter is equipped with
internal data logging for recording and
saving system data:
· 5-minute mean values of voltages,
currents, output, temperature and ir-
radiation (if sensor is installed)
· 5-minute, daily, monthly and annual
values of energy yield
· Memory for malfunction messages
Grid monitoring
The AT Solar Inverter assumes the task
of grid monitoring for the protection of
the unit and persons. In case of abnormal
grid conditions, feeding is immediately
interrupted and the solar inverter discon-
nects from the grid by triggering the grid
relay.
Design of solar inverter
The principle design of the AT Solar In-
verters can be recognised from the block
diagram. The most important character-
istic of the inverter is the earthing of the
solar generator, i.e. the negative terminal
is directly connected to the neutral con-
ductor on the grid.
The solar generator voltage connected to
the inverter input is always positive and is
initially adapted by the DC actuator and
then converted to alternating current by
the high-efficiency HERIC®inverter. The
AC connection is made with 5 wires for a
3-phase feed point (3-phase AC current
connection) due to the 3-phase passive
grid monitoring, whereby feeding is
only single-phase. A 3-wire connection
is made at the single-phase feed point
(alternating current connection).