SMA SI 3324 Installation

Sunny Island 3324/4248
Installation Guide

Installation Guide Version 4.0 SI3324/4248-14:SE2406

IME-SI4248

SMA Technologie AG

Table of Contents

1 Notes on this Manual. . . . . . . . . . . . . . . . . . .9

1.1 Validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1.2 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2 The Sunny Island 3324/4248 . . . . . . . . . . . .11

2.1 General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.2 At a Glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.3 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.4 Scope of Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2.5 Required tools and resources . . . . . . . . . . . . . . . . . . . . 15

2.6 Accessories (optional) . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.7 SMA Products (Optional) . . . . . . . . . . . . . . . . . . . . . . . 17

2.8 Type Plate/Firmware Version . . . . . . . . . . . . . . . . . . . . 18

3 Safety Instructions . . . . . . . . . . . . . . . . . . . .19

3.1 Important Operational Notes . . . . . . . . . . . . . . . . . . . . 19

3.2 Potential Hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4 Installation. . . . . . . . . . . . . . . . . . . . . . . . . .23

4.1 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.1.1 Lifting/Moving. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.1.2 Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.1.3 Installation Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.1.4 Minimum Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.1.5 Wall Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.2 Mounting the Sunny Island 3324/4248. . . . . . . . . . . . . 29

4.2.1 Angle bracket on the underside . . . . . . . . . . . . . . . . . . 29

4.2.2 Wall Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

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SMA Technologie AG

5 Electrical Connection . . . . . . . . . . . . . . . . . .31

5.1 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.2 DC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

5.2.1 Safety Precautions/Conditions . . . . . . . . . . . . . . . . . . . 36

5.2.2 Cable Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5.2.3 Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

5.3 AC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

5.3.1 Cable Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

5.3.2 AC Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

5.3.3 AC Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

5.4 Additional Connections . . . . . . . . . . . . . . . . . . . . . . . . 44

5.4.1 Cooling Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

5.4.2 Battery Temperature Sensor . . . . . . . . . . . . . . . . . . . . . 46

5.4.3 Load shedding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

5.4.4 Generator Start with a Single Contact . . . . . . . . . . . . . . 50

5.4.5 Generator Start Using GenMan . . . . . . . . . . . . . . . . . . 52

5.4.6 Synchronization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

5.5 Connection of the Communication Interface . . . . . . . . . . 54

6 Removing the Cover . . . . . . . . . . . . . . . . . .55

6.1 Removing the Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . 55

6.2 Installing the Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

7 Operation . . . . . . . . . . . . . . . . . . . . . . . . . .57

7.1 Control Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

7.2 Changing Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . 58

7.3 Explanation of the Light-emitting Diodes (LEDs) . . . . . . . 59

7.4 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

7.5 Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

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SMA Technologie AG

8 Commissioning. . . . . . . . . . . . . . . . . . . . . . .63

8.1 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

8.2 Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

8.3 Password Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

8.4 Operating with the Public Grid . . . . . . . . . . . . . . . . . . . 72

8.5 Operation with a Generator. . . . . . . . . . . . . . . . . . . . . 74

8.5.1 Selection of Generator Control Method. . . . . . . . . . . . . 75

8.5.2 Setting the Output Current Limit . . . . . . . . . . . . . . . . . . 77

8.5.3 Generator Request. . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

8.6 Automatic Load Shedding Setting . . . . . . . . . . . . . . . . . 80

8.7 Operation with Sunny Boy Inverters . . . . . . . . . . . . . . . 80

8.8 Autostart Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

8.9 Starting after First Commissioning . . . . . . . . . . . . . . . . . 81

9 Switching On and Off . . . . . . . . . . . . . . . . .83

9.1 Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

9.2 Switching On/Starting . . . . . . . . . . . . . . . . . . . . . . . . . 84

9.3 Switching Off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

9.4 Disconnecting the inverter from Voltage Sources . . . . . . 85

9.5 Restarting the Automatic Shutdown . . . . . . . . . . . . . . . . 86

10 System Examples . . . . . . . . . . . . . . . . . . . . .87

10.1 PV Stand-alone System. . . . . . . . . . . . . . . . . . . . . . . . . 88

10.2 PV Stand-alone System with Generator . . . . . . . . . . . . . 90

10.2.1 Generators with Manual Start. . . . . . . . . . . . . . . . . . . . 91

10.2.2 Generator Start with a Single Contact (2-Wire) . . . . . . . 92

10.2.3 With Autostart and External Switch . . . . . . . . . . . . . . . . 93

10.2.4 With GenMan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

10.3 PV Grid Backup System . . . . . . . . . . . . . . . . . . . . . . . . 97

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SMA Technologie AG

11 Battery Management. . . . . . . . . . . . . . . . .101

11.1 Charge Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

11.2 Silent Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

11.3 Deep Discharge Protection/Battery State. . . . . . . . . . . 105

11.4 Exchanging the Batteries . . . . . . . . . . . . . . . . . . . . . . 109

12 Generator . . . . . . . . . . . . . . . . . . . . . . . . .111

12.1 Load-dependent Generator Request . . . . . . . . . . . . . . 111

12.2 Temperature-dependent Generator Request . . . . . . . . . 113

12.3 GenMan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

12.4 Display Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

13 Connecting Sunny Boy Inverters . . . . . . . .117

13.1 Sunny Boy Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

13.2 Setting Sunny Boy Parameters . . . . . . . . . . . . . . . . . . 118

13.3 Frequency Shift Power Control (FSPC). . . . . . . . . . . . . 120

14 Additional Functions. . . . . . . . . . . . . . . . . .121

14.1 Autostart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

14.2 ParameterSet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

14.3 Offset Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

14.4 Automatic Frequency Adjustment . . . . . . . . . . . . . . . . 122

15 Communication Interface . . . . . . . . . . . . . .123

15.1 Connection of the Interface. . . . . . . . . . . . . . . . . . . . . 124

15.2 Jumper Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125

15.3 Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

16 Updating Firmware . . . . . . . . . . . . . . . . . .127

17 Menu Structure and Parameter Lists . . . . .130

17.1 Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130

17.2 Menus Requiring the Installer Password. . . . . . . . . . . . 132

17.2.1 Displayed Measurement Values . . . . . . . . . . . . . . . . . 132

17.2.2 Adjustable System Parameters . . . . . . . . . . . . . . . . . . 134

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SMA Technologie AG

17.2.3 System and Fault Messages . . . . . . . . . . . . . . . . . . . . 140

17.2.4 Operation (Operation). . . . . . . . . . . . . . . . . . . . . . . . 141

18 Troubleshooting/Problem Solving . . . . . . .143

18.1 List of Fault Displays. . . . . . . . . . . . . . . . . . . . . . . . . . 143

18.2 Troubleshooting FAQs . . . . . . . . . . . . . . . . . . . . . . . . 145

19 Technical Data . . . . . . . . . . . . . . . . . . . . . .149

20 Contact. . . . . . . . . . . . . . . . . . . . . . . . . . . .151

21 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . .153

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SMA Technologie AG Inhaltsverzeichnis

Installation Guide SI3324/4248-14:SE2406 Page 8

SMA Technologie AG Notes on this Manual

1 Notes on this Manual

This installation manual is intended solely for qualified electricians. Its aim is to help
install and set up a Sunny Island 3324/4248 quickly and correctly.

For further operating information, please consult the Sunny Island 3324/4248 user
manual.

1.1 Validity

This installation manual for the Sunny Island 3324/4248 is valid for all firmware
versions up to and including 1.84/1.94.

You can call up the firmware version of your inverter

• by entering the "31-2 FWVers" parameter in the Sunny Island 3324/4248
display (see section 17.2.3 "System and Fault Messages" (Page 140)).

• and also on the EPROM label (see section 16 "Updating Firmware" (Page 127))
in the Sunny Island 3324/4248.

This product may only be used in the intended area of application, i.e. it is only
approved for use in 50 Hz grids.

Do not use the Sunny Island 3324/4248 for purposes other than those indicated in
this installation manual. Use of the inverter for inappropriate purposes voids the
warranty.

For further questions, you can call the Sunny Island hotline at [phone].

1.2 Symbols Used

To ensure optimum use of these instructions, please note the following explanations
of symbols used.

The symbol "Warning" indicates a danger that, if ignored, can lead
to serious injury or death and can also damage the inverter.

This symbol indicates a notice.
Failure to observe the advice can cause difficulties in the current working step
and can possibly also hinder optimum operation of the inverter.

Installation Guide SI3324/4248-14:SE2406 Page 9

Notes on this Manual SMA Technologie AG

This symbol identifies an example.

Here you will find further details on the operation and behavior of the inverter.

Page 10 SI3324/4248-14:SE2406 Installation Guide

SMA Technologie AG The Sunny Island 3324/4248

2 The Sunny Island 3324/4248

2.1 General Description

The Sunny Island 3324/4248 is a bidirectional battery power converter (battery
inverter and charger), ideally suited for use in stand-alone grid operation. This
inverter allows you to charge lead acid batteries, using power sources provided on
the AC side (e.g. generator, public grid, Sunny Boy). The Sunny Island 3324/4248
creates a 230 V AC stand-alone grid using the energy stored in the batteries,
allowing stable operation of connected loads and power generation devices (e.g. PV
inverters).

Energy sources can also be connected on the DC side, as long as the specified limits
are not exceeded (see section 19 "Technical Data" (Page 149)).

The Sunny Island 3324/4248 is able to control a starter contact for a generator and
automatically connect or disconnect it to an AC-grid (see section 12 "Generator"
(Page 111)).

The Sunny Island 3324/4248 can also switch off particular loads if the batteries do
not have sufficient electrical energy available (see section 5.4.3 "Load shedding"
(Page 48)).

The Sunny Island 3324/4248 can be used in different system configurations.
Detailed information on the different stand-alone systems can be found in section 10
"System Examples" (Page 87).

Installation Guide SI3324/4248-14:SE2406 Page 11

The Sunny Island 3324/4248 SMA Technologie AG

The following figure provides an overview of possible system configurations:

Loads

Batteriy

temperature sensor

Battery

Fuel Cell

*)

Can

N

TBAT

DC/DC

converter

R

E
W

O
P

M
E

SYST

T

R
O
P

E
R

Y
R
O

M

E
M

M
O
C

A

M
S

M

CO
T
E

N

M
O
C

B
S

U

x
o

B
y
n

b
n

e

Sunny

u

W
S

WebBox

PV x

Sunny Boy

t
l
s

n

u

s
o
i
u

a
t
l

g

F
b
h

a

e
n

r

r
e
c

u

i

u

th
e
s

r

r

l

t

r

i
p
d
e

a

r

E

E

B

O

Stö

Fa

*)

Com

Load_S

=

d
n

y

a
l

n

s

n

I
u
S

=

AC Output

G_Req

DC Input

Charge-

PV

controller

=

=

PV 1

Sunny Boy

Windy Boy

t
l
s

n

u

s
o
i
u

a
t
l

g

F
b
h

a

e
n

r

r
e
c

u

i

u

th
e
s

r

r

l

t

r

i
p
d
e

a

r

E

E

O

B

Fa

Stö

AC input

G_Ready

t
l
s

n

u

s
o
i

u

a
t

l

g

F
b

h

a

e
n

r

r

e

c

u

i

u

th
e

s

r

r

l

t

r

i

p

d
e

r

a
B

E

E

O

Stö

Fa

r

e

t

h

c

i

r

l

r

e

te

s

r

h

c

ve

e

n

i
w
g

g
n

n
i

i
r

r
t

t

s
S

­k

c
i

i
a

a
t

t
l

l

tovo

tovo
o

o
h

h
P

SWR 3000

Windy Boy

P

Start

Utility

Auto

Control voltage

*) Not included in delivery

Generator

Description:

Page 12 SI3324/4248-14:SE2406 Installation Guide

SMA Technologie AG The Sunny Island 3324/4248

PE N L

PE N L

SHIELD

G_RUN-

SHIELD

G_RUN+

S_IN-

S_OUT-

S_IN+

S_OUT+

FAN+

TBAT2

FAN-

TBAT1

LOAD_S

G_REQ

LOAD_S

G_REQ

CTS

RXD

S_GND

TXD

Shield

CAN_H

C_GND

CAN_L

Equipment

Ground

DC-

Negative

DC-

Positive

2.2 At a Glance

The following figure provides an overview of all control elements and connections of
the Sunny Island 3324/4248 (shown with cover removed).

Equipment

Ground

M
M

M
M

DC circuit
breaker

Display

LEDs showing
inverter

MMM
M

OFF

OFF

M
M

150V
200V
S5
S7
S9
S11
S13
S15
ENS2
ENS1

ENTERESC

MMM
M

operation: red

Keys

M
M

Socket for
Piggy-Back
(communication)

M

M

M

M

FAN+

CTS

Shield

RXD

CAN_H

S_GND

C_GND

TXD

CAN_L

Additional
connections (e.g.
communication,

M

M

control relays,...)

DC-

Negative

M
M

DC-

Positive

PENL

M

M

AC-OUTPUT AC-INPUT

M

M

M
M

M
M

PENL

M
M

SHIELD

S_IN-

LOAD_S

G_RUN-

S_OUT-

G_REQ

LOAD_S

G_REQ

M

M

TBAT2

SHIELD

S_IN+

FAN-

G_RUN+

S_OUT+

TBAT1

M
M

DC and AC
grounding

DC connection

(battery)

AC output

(Load)

AC input

(generator/utility)

Installation Guide SI3324/4248-14:SE2406 Page 13

The Sunny Island 3324/4248 SMA Technologie AG

2.3 Dimensions

The Sunny Island 3324/4248 housing has the following dimensions:

245 mm

OFF

OFF

ENTERESC

430 mm

600 mm

Page 14 SI3324/4248-14:SE2406 Installation Guide

SMA Technologie AG The Sunny Island 3324/4248

2.4 Scope of Delivery

The following elements are included:

• 1 Sunny Island 3324/4248 with housing cover (not fastened)

• 1 wall bracket

• 1 battery temperature sensor

• 5 cable feed-throughs M25

•5 nuts M25

• 1 double-hole insert for cable feed-throughs M25

• 4 cable feed-throughs M20

•4 nuts M20

• 4 double-hole inserts for cable feed-throughs M20 (2 x 6 mm)

• 1 cable feed-through M12

•1 nut M12

• 4 housing cover screws

• 1 screw for joining the angle bracket to the wall bracket

• 1 installation manual and 1 user manual

• 1 safety instructions (multilingual)

• 1 "Guarantee and Warranty Conditions" form

2.5 Required tools and resources

The following tools are recommended for mounting and installing the Sunny Island
3324/4248:

Installation of the Sunny Island 3324/4248 wall bracket:

1 drill
1 suitable drill (e.g. stone drill), Ø 8 mm
3 wall anchors for the wall bracket (e.g. SX 8)
3 hexagon bolts, 6x50 mm, washers
1 spirit level

refer to the "Installation" section for any further tools required

Installation of the Sunny Island 3324/4248:

1 stripping pliers

cable end sleeves

1 digital multimeter

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The Sunny Island 3324/4248 SMA Technologie AG

torque wrench with flathead screwdriver adapters:

1

size 10 mm

size 5.5 mm

size 2.5 mm

1 set hexagon/Allen keys, 3 mm to 8 mm

cable ties

1 cable knife

cable lugs
1 combination pliers
1 Phillips screwdriver, PH1
1 Phillips screwdriver, PH2

cables (see sections 5.1 "Grounding" (S. 33); 5.2 "DC Connection" (S.

36), 5.3 "AC Connection" (S. 40))
1 10 mm open-end/ring wrenches or socket wrench
1 19 mm open-end/ring wrenches
1 24 mm open-end/ring wrenches
1 30 mm open-end/ring wrenches

1

crimping tool for the cable end sleeves (suitable for cable cross-

sections of 2.5 mm², 4 mm², 10 mm² to 50 mm²)
1 flathead screwdriver, 0.4 x 2.5 mm
1 flathead screwdriver, 1.0 x 10 mm
1 flathead screwdriver, 1.0 x 5.5 mm

heat shrink tubing
1 diagonal cutting pliers

Installation of the Sunny Boy or Windy Boy:

1

1

service cable, to allow settings to be made (see section 2.7 "SMA

Products (Optional)" (S. 17))

PC/laptop with the Sunny Data software (available as a free

download from www.SMA.de)

access permission: In order to set grid relevant parameters in the

Sunny Boy (see section 13.2 "Setting Sunny Boy Parameters" (S.
1

118)), you need a special access code, the installer code. You can

obtain this personal code from the Sunny Boy hotline (telephone: +49

561 9522 499).

Page 16 SI3324/4248-14:SE2406 Installation Guide

SMA Technologie AG The Sunny Island 3324/4248

2.6 Accessories (optional)

The following accessories are not essential for operating a Sunny Island 3324/4248,
however they extend the range of possible applications in a stand-alone grid:

• 1 GenMan (generator manager) (SMA order number: "SI-GenMan-TFH-230")
Allows the Sunny Island 3324/4248 to control generators requiring more than a
simple start/stop (2-wire) signal for remote control (see section 12.3 "GenMan"
(Page 113)).

• 1 separate load disconnecting switch for the batteries (SMA order number: "SI­BattCase.01-200" for SI4248; "SI-BattCase.01-250" for SI3324)
Allows rapid, safe isolation of the Sunny Island 3324/4248 from the connected
batteries and also provides cable protection (see section 5.2 "DC Connection"
(Page 36)).

• 1 service cable for data transfer (SMA order number: "USBPBS-11"-USB-Service­Interface). You also require the free "Sunny Data" software (see below).
Allows connection of a PC/laptop for communicating with the Sunny Island
3324/4248 in order to set parameters and for data read-outs (see section 15
"Communication Interface" (Page 123)).

SMA Technologie AG also offers an extensive range of products allowing you to
communicate with the Sunny Island 3324/4248, for data read-outs and much more.
Among these devices are:

• Sunny Boy Control

• Sunny Boy Control Plus

•WebBox

The "Sunny Data" and "Sunny Data Control" software, which you can use to make
settings in and read/analyze data from your inverter, can be downloaded for free
from the SMA Technologie AG website at www.SMA.de (see section 20 "Contact"
(Page 151)).

2.7 SMA Products (Optional)

A stand-alone system using the Sunny Island 3324/4248 as the grid controller can
also be fed with other alternative energy sources. SMA Technologie AG offers the
following inverter products (see figure Page 12):

• Sunny Boy inverters (for feeding in from PV systems): SB 700/SB 1100/
SB 1100LV/SB 1700/SB 2500/SB 2800i/SB 3000/SB 3300/SB 3800/
SMC 5000/SMC 6000/SMC 6000TL/SMC 7000TL/SMC 8000TL

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The Sunny Island 3324/4248 SMA Technologie AG

• Windy Boy inverters (for feeding in from wind turbines or hydropower systems):
WB 1100/WB 1700/WB 2500/WB 2800i/WB 3000/WB 3300/WB 3800/
WB 6000

• Hydro-Boy inverters (for feeding in from fuel cell systems)

2.8 Type Plate/Firmware Version

You can identify the Sunny Island 3324/4248 from the type plate and the firmware
version.

The type plate is located on the left side of the housing (when the Sunny Island 3324/
4248 hangs vertically on the wall bracket).

You can call up the firmware version of your Sunny Island 3324/4248 under the "31­2 FWVers" parameter (see section 17.2.3 "System and Fault Messages"
(Page 140)). Information on firmware updates is provided in section 16 "Updating
Firmware" (Page 127).

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SMA Technologie AG Safety Instructions

3 Safety Instructions

3.1 Important Operational Notes

Please follow all operating and safety instructions in this manual. Failure to follow
these instructions could result in damage to the inverter and cause personal injury.
Carefully read the safety instructions before installing and commissioning the
inverter.

Ensure that the handbook are stored in an easily accessible location.

The Sunny Island 3324/4248 may only be installed or opened by
qualified personnel (electricians).

Never attempt to repair the inverter yourself. Unprofessional
repair work can be dangerous. Please consult your dealer or the
manufacturer if a fault occurs.

Be sure to observe all applicable regional standards and
guidelines.

The own consumption of the Sunny Island 3324/4248 discharges
the batteries, in standby mode (inverter DC disconnect is on,
inverter is in STOP mode and must be started manually) this load
is about 4 W and in idle mode (inverter is on, in invert mode, no
AC loads are present) it is about 22 W. You should take note of this
when you

• wish to install the Sunny Island 3324/4248 but do not wish to
immediately use it,

• or when operating the Sunny Island 3324/4248 for longer
times without recharge possibilities (e.g. in winter with snow on
your modules).

In these cases, you should set the Sunny Island 3324/4248 to Stop
mode (see section 9.3 "Switching Off" (S. 85)) and disconnect it
from the batteries via the DC circuit breaker.

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Safety Instructions SMA Technologie AG

3.2 Potential Hazards

Like any other power converter, the Sunny Island 3324/4248 is an electrical device
that presents certain hazards when operated.

Life-threatening voltages and currents exist within the Sunny
Island 3324/4248. Complete protection against accidental contact
is only provided when the following points are followed according
to the handbook:

• the inverter has been mounted correctly

• the inverter has been properly grounded

• all connections to the inverter
are made correctly

• the cover of the housing is securely closed

Failure to observance of these regulations may result in persons
suffering life-threatening injuries due to electric shock or parts of
the system being damaged.

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SMA Technologie AG Safety Instructions

Before performing any maintenance work, installation work or an
EPROM change on the Sunny Island 3324/4248, you must make
absolutely sure that all inverters built in or connected to the system
are completely isolated from all voltage sources (batteries, (stand­alone-)grid, generator). Ensure that the system cannot be
accidentally switched on again. Proceed in the order given below:

• Switch off all loads.

• Press and hold the "ESC" key until the "To STOP press ENTER"
message appears.

• Press "ENTER".

• Switch off the Sunny Island 3324/4248 using the DC circuit
breaker and also disconnect the inverter from the batteries (e.g.
using the optional SI-BattCase load break switch).

• Then disconnect the Sunny Island 3324/4248 from the grid/
generator.

• Make sure that the Sunny Island 3324/4248 has been
disconnected from all voltage sources.

• Wait at least three minutes to let the capacitors discharge and
allow the voltage inside the inverter to drop to a safe level.

• Open the housing cover and ensure the inverter is not under
voltage.

Use only rechargeable lead acid batteries. The use of other types
of battery can lead to personal injury and material damage.

The Sunny Island 3324/4248 can start up automatically. When
working on the stand-alone grid, ensure that ALL sources of AC
and DC power in the system have been switched off (see above).

When touching the inverter, please note that some housing
components of the Sunny Island 3324/4248 heat up during
operation. Temperatures may exceed 60°C. This represents a risk
of burns.

Installation Guide SI3324/4248-14:SE2406 Page 21

Safety Instructions SMA Technologie AG

This inverter has NOT been designed to supply life-sustaining
medical devices. The Sunny Island 3324/4248 may not be used in
installations where a power outage could result in personal injury.

This inverter is suitable only for installation in enclosed spaces.
Therefore, do not expose it to moisture, rain or direct sunshine (IP
category 30).

The Sunny Island 3324/4248 has been designed for use at
elevations up to 2000 m above sea level. Please contact SMA
Technologie AG before using the inverter at elevations above
2000 m.

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SMA Technologie AG Installation

4 Installation

Please take note of the required installation conditions specified in section 4.1
"Preparation" (Page 23) before mounting, installing and commissioning the Sunny
Island 3324/4248.

4.1 Preparation

4.1.1 Lifting/Moving

The Sunny Island 3324/4248 weighs 39 kg. Ensure that at least
two people are available for installing the inverter. Always wear
personal protective equipment (protective clothing, gloves, safety
boots) to avoid the danger of injuries.

4.1.2 Unpacking

Before installing the Sunny Island 3324/4248 make sure that all parts are included
in the delivery.

• Carefully check the packaging and the Sunny Island 3324/4248 for any signs of
damage. Please note that the housing cover is delivered unmounted. Carefully
separately remove the cover and the inverter from the packaging and do not
install the cover until the inverter is properly mounted and installed, as described
in section 6 "Removing the Cover" (Page 55).

• Ensure that all parts are included in the delivery (see section 2.4 "Scope of
Delivery" (Page 15)).

• Enter the type and serial number of the inverter into the "Guarantee and
Warranty Conditions" form.

• Keep the documents in a location where they will be easy to find later.

If something is missing or the Sunny Island 3324/4248 has been damaged during
shipment, contact SMA Technologie AG immediately. Information is provided in
section 20 "Contact" (Page 151) of this installation manual.

Keep the packaging in case you need to return the battery inverter or its
accessories.

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Installation SMA Technologie AG

4.1.3 Installation Site

The Sunny Island 3324/4248 weighs 39 kg. Please take this
weight into account when choosing the installation site and
method of installation of the Sunny Island 3324/4248.

Protect the Sunny Island 3324/4248 from direct sunlight. High
temperatures lead to lower performance of the battery inverter.

The ambient temperature must not be outside the - 25°C to
+ 50°C range.

39 kg

Do not install the Sunny Island 3324/4248

• on flammable materials,

• in areas where there are easily flammable substances,

• in potentially explosive areas!

Never install the Sunny Island 3324/4248 in rooms where a
danger of explosion exists!

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SMA Technologie AG Installation

4.1.4 Minimum Clearance

Air enters the Sunny Island 3324/4248 through the underside of the housing and
then flows through the inverter before exiting through the air grills on top of the
housing.

When installing the inverter, a minimum clearance of 20 cm at the sides and 10 cm
above the housing must be provided to ensure adequate ventilation of the Sunny
Island 3324/4248.

All external cables are connected through the underside of the housing. This requires
a minimum clearance of at least 30 cm.

Operation of the inverter and reading the display is much easier when the Sunny
Island 3324/4248 is installed with the display at eye-level with at least 50 cm
clearance in front. A minimum clearance of at least 10 cm is essential in order to
install the housing cover.

Minimum Clearance

Sides 20 cm

Top 10 cm

Underneath 30 cm

Front 10 cm

20

cm

10 c m

S

u
n
n

y
I
s
l

a

n

d

20 cm

10 cm

30 cm

When installing the Sunny Island 3324/4248 in smaller rooms, make sure that
adequate ventilation is available. The inverter produces heat when operating
that must be removed.

Installation Guide SI3324/4248-14:SE2406 Page 25

Installation SMA Technologie AG

In domestic installations, the inverter should not be
mounted on plasterboard walls, wooden boarding
or similar as otherwise audible vibrations are likely
to result.

SMA Technologie AG recommends securing the
Sunny Island 3324/4248 to a solid surface.

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SMA Technologie AG Installation

4.1.5 Wall Mounting

The Sunny Island 3324/4248 should be operated hanging vertically. To make the
job easier, we recommend you use the supplied wall bracket to mount the Sunny
Island 3324/4248 and use a spirit level to ensure correct alignment. The condition
and type of material used in the mounting surface determines the manner in which
the wall mounting is fastened.

In solid concrete or block walls the wall
bracket is fastened using the three outer holes.
Use type SX 8 wall anchors and (e. g.)
stainless steel hexagon bolts (6 mm x 50 mm)
with suitable washers, according to the DIN
571 standard.

S

u
n

n

y
I
s

l

a

n
d

This figure shows a detailed view of
the center distances of the holes for

260 mm

the wall bracket when installing on
a solid concrete or block wall.

310 mm

Installation Guide SI3324/4248-14:SE2406 Page 27

Installation SMA Technologie AG

If the Sunny Island 3324/4248 is to be
installed on laths, then use the four middle
holes in the wall bracket. Ensure that the wall
bracket is positioned over a wall stud. Make
sure that the wall where you intend to install
the Sunny Island 3324/4248 is vertical and
can carry the weight of the Sunny Island
3324/4248 (39 kg) on a long-term basis.
Use (e.g.) stainless steel Phillips screws (6
mm x 50 mm) with suitable washers,

Sunny

Island

according to the DIN 571 standard.

This figure shows a detailed view
of the the center distances of the
holes for the wall bracket when
installing on a single wall stud.

45 mm
30 mm

310 mm

235 mm

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SMA Technologie AG Installation

4.2 Mounting the Sunny Island 3324/4248

The following section describes the installation of the Sunny Island 3324/4248 in
detail. Keep to the order of operations suggested here:

1. Angle bracket on the bottom of the housing

2. Wall bracket

4.2.1 Angle bracket on the underside

The angle bracket on the underside of the Sunny Island 3324/4248 is mounted
backwards on delivery to avoid damage during transport. The angle bracket is used
to fasten the inverter to the wall bracket (see section 4.2.2 "Wall Bracket"
(Page 30)).

Before installing the inverter, you must first unscrew this angle bracket and then rotate
it so that the flange points downwards when the Sunny Island 3324/4248 hangs
vertically on the wall. The angle bracket can now be again screwed to the underside
of the Sunny Island 3324/4248, at the side of the the inverter that lies against the
wall (see figure below).

Underside view

Angle bracket

mounted with

flange pointing

downwards

Side view

Wall

Installation Guide SI3324/4248-14:SE2406 Page 29

Installation SMA Technologie AG

4.2.2 Wall Bracket

1. Mount the wall bracket (1). You can use
the wall bracket as a drilling template to
mark the positions for drilling the holes.

2

2. Then hook the Sunny Island 3324/4248
onto the wall bracket (2) at its upper
mounting plate so that it cannot be
moved sideways.

3. Secure the Sunny Island 3324/4248
against being raised by screwing the
angle bracket (see section4.2.1 "Angle
bracket on the underside" (Page 29)) to
the lower threaded holes of the wall
bracket using the supplied M6 x 10 mm
bolt.

4. Make sure the Sunny Island 3324/4248
is positioned securely on the bracket.

1

1

3

Page 30 SI3324/4248-14:SE2406 Installation Guide