SMA Sunny Boy SB 2500 User manual

Sunny Boy SB 2500 and SB 3000
String Inverter for Photovoltaic Plants
Installation Guide Version 1.0 SB25_30-11:SE0307
IMEN-SB25_30

SMA Technologie AG Table of Contents
Installation Guide SB25_30-11:SE0307 Page 3
Table of Contents
1 Explanation of the Symbols Used . . . . . . . . . . . . 5
2 Foreword. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Target Group. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Appropriate Usage. . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Validity of Documentation . . . . . . . . . . . . . . . . . . . . 8
3 Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1 Unit Description . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 External Dimensions . . . . . . . . . . . . . . . . . . . . . . . 12
5 Installation Requirements. . . . . . . . . . . . . . . . . . 13
5.1 Installation Location Requirements . . . . . . . . . . . . . 13
5.2 PV Generator Requirements . . . . . . . . . . . . . . . . . . 15
5.3 Low Voltage Grid (AC) . . . . . . . . . . . . . . . . . . . . . 15
6 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.1 Mounting the Device. . . . . . . . . . . . . . . . . . . . . . . 21
6.2 Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . 22
6.2.1 Connecting the AC Output . . . . . . . . . . . . . . . . . . . . . . . . . . .24
6.2.2 PV String (DC) Connection . . . . . . . . . . . . . . . . . . . . . . . . . . .30
6.3 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7 Opening and Closing the Sunny Boy . . . . . . . . 33
7.1 Opening the Sunny Boy . . . . . . . . . . . . . . . . . . . . 33
7.2 Closing the Sunny Boy . . . . . . . . . . . . . . . . . . . . . 33
8 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.1 Sunny Boy SB 2500 . . . . . . . . . . . . . . . . . . . . . . . 35
8.1.1 PV Generator Connection Data . . . . . . . . . . . . . . . . . . . . . . . .35
8.1.2 Grid Connection Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

Table of Contents SMA Technologie AG
Page 4 SB25_30-11:SE0307 Installation Guide
8.2 Sunny Boy SB 3000 . . . . . . . . . . . . . . . . . . . . . . . 37
8.2.1 PV Generator Connection Data . . . . . . . . . . . . . . . . . . . . . . . .37
8.2.2 Grid Connection Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
8.3 General Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
8.3.1 Efficiency of the Sunny Boy SB 2500 . . . . . . . . . . . . . . . . . . . .40
8.3.2 Efficiency of the Sunny Boy SB 3000 . . . . . . . . . . . . . . . . . . . .41
8.4 Operating Parameters. . . . . . . . . . . . . . . . . . . . . . 42
8.4.1 Explanation of the Operating Parameters . . . . . . . . . . . . . . . . .42
8.4.2 Parameter Settings for Germany . . . . . . . . . . . . . . . . . . . . . . .45
8.4.3 Country-specific Parameter Settings . . . . . . . . . . . . . . . . . . . . .47
8.4.4 Fixed Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
8.5 Certificate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8.5.1 CE Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . .49
8.5.2 SMA Grid Guard Certificate . . . . . . . . . . . . . . . . . . . . . . . . . .50
9 Replacing the Varistors . . . . . . . . . . . . . . . . . . . 51
10 Rating for a Line Circuit Breaker . . . . . . . . . . . . 55
11 The Communication Interface. . . . . . . . . . . . . . . 59
11.1 Connection of the Communication Interface. . . . . . . 60
11.1.1 Jumper Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
12 Contact. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

SMA Technologie AG Explanation of the Symbols Used
Installation Guide SB25_30-11:SE0307 Page 5
1 Explanation of the Symbols Used
To ensure optimum use of this document, note the following explanation of the symbols
used.
This symbol indicates an example.
This symbol indicates a note which, if ignored, will make the procedure or
operation more difficult.
This symbol indicates a fact which, if not observed, could result in damage
to components or represent a danger to persons. Read these passages
especially carefully.

Explanation of the Symbols Used SMA Technologie AG
Page 6 SB25_30-11:SE0307 Installation Guide

SMA Technologie AG Foreword
Installation Guide SB25_30-11:SE0307 Page 7
2 Foreword
Refer to the operating manual for detailed information on troubleshooting and
operating the Sunny Boy as well as on the various communication options.
Sunny Design will assist you in the system design and checking of the string size for a
given type of inverter. Further information on Sunny Design is available at
www.SMA.de.
If you require further information, please call the Sunny Boy Hotline:
[phone] - 499
2.1 Target Group
This installation guide is exclusively intended for qualified electricians and is intended
to assist with the speedy and correct installation and commissioning of the SMA Sunny
Boy SB 2500 and Sunny Boy SB 3000 inverters.
The Sunny Boy is equipped with the SMA grid guard. This is a type of automatic
disconnection device. This means that the Sunny Boy complies with the VDEW
(Verband der Elektrizitätswirtschaft – German Electricity Industry Association)
regulations for the connection and parallel operation of power-generating systems
to the low-voltage grid of the energy supply company and with DIN VDE 0126-1-
1, which forms part of these regulations.
Warning!
The Sunny Boy may only be installed by trained specialists. The installer
must be approved by the local energy supplier. Read this installation
guide carefully. Ensure compliance with all prescribed safety regulations,
the technical connection requirements of the local energy supplier and
any other applicable provisions.

Foreword SMA Technologie AG
Page 8 SB25_30-11:SE0307 Installation Guide
2.2 Appropriate Usage
2.3 Validity of Documentation
The Sunny Boy SB 2500 and Sunny Boy SB 3000 are identical in construction and only
differ in their technical data. This documentation uses the terms Sunny Boy or inverter
when referring to either device type. The device will be specified with its full name if the
information only refers to that particular device.
Warning!
The Sunny Boy is designed for operation in grid-connected PV systems.
Use of the Sunny Boy for any purpose other than those specified in this
documentation will lead to the loss of the right to all warranty claims and
may lead to a fault in the device. This includes, among other things, the
operation with voltage sources without any current limit. When in doubt,
contact SMA.

SMA Technologie AG Safety Instructions
Installation Guide SB25_30-11:SE0307 Page 9
3 Safety Instructions
Warning! Overvoltage!
Check the system design using the Sunny
Design tool (www.SMA.de) or by calling
the Sunny Boy Hotline. Overvoltages lead
to the destruction of the Sunny Boy.
Warning! High voltage!
Work on the Sunny Boy with the cover removed must be carried out by a
qualified electrician! High voltages are present in the device. Work is to
be carried out on the Sunny Boy only once the AC and DC voltages have
been disconnected from the Sunny Boy, and once it has been ensured that
the capacitors have been discharged.
The Sunny Boy must be disconnected from the grid and precautions must
be taken to prevent the grid being accidentally reconnected. In addition,
the connections to the PV generator must be disconnected.
After isolating the AC and DC voltage, you must wait approximately 30
minutes for the capacitors in the Sunny Boy to discharge. Only then is it
safe to open the unit by removing the cover to make sure that no voltage
is present in the device.
Warning! Electrostatic charge!
When working on the Sunny Boy and handling its assemblies, remember
to observe all ESD safety regulations. Electronic components are
susceptible to electrostatic charge. Discharge any electrostatic charge by
touching the grounded housing before handling any electronic
component.

Safety Instructions SMA Technologie AG
Page 10 SB25_30-11:SE0307 Installation Guide