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

350

585

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23 4 5

87 9 13121110

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.

Imprint

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

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.

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

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

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

1.0 Product Description

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

· 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).

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