SMA Sunny Island 5048 Parts list manual

SI5048-TB-TEN110340 | TBE-SI5048 | Version 4.0
EN
Off-Grid Inverter
SUNNY ISLAND 5048
Technical Description

SMA Solar Technology AG Table of Contents
Technical Description SI5048-TB-TEN110340 3
Table of Contents
1 Notes on this Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.1 Validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.2 Target Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.3 Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.4 Nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.5 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2 The Sunny Island 5048 . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.1 Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2 At a glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.3 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.4 Identifying the Sunny Island . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3 Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.1 Important Notes Regarding Operation. . . . . . . . . . . . . . . . . . . 22
3.2 Potential Hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.1 Selecting the Mounting Location. . . . . . . . . . . . . . . . . . . . . . . . 24
4.2 Mounting the Sunny Island with the Wall Mounting Bracket . . 26
5 Opening and Closing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.1 Opening the Sunny Island . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.2 Closing the Sunny Island. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6 Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.1 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.2 DC connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.2.1 Safety Precautions/Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.2.2 Cable Sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

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6.2.3 Cable Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.2.4 Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.3 AC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.3.1 Cable Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.3.2 AC1 (Loads/Sunny Boys) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.3.3 AC2 (Generator/Grid) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.4 Additional Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.4.1 Battery Temperature Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.4.2 Battery Current Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6.4.3 Communication for Multi-device Connection . . . . . . . . . . . . . . . . . . . . . . . . 43
6.4.4 Multi-function Relay 1 and 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.4.5 BatVtgOut Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.4.6 DigIn Digital Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.5 Interface for External Communication. . . . . . . . . . . . . . . . . . . . 50
6.5.1 Connection of the Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7 Control Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.1 Display Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
7.2 DC Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
7.3 Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.4 Meaning of the Light Emitting Diodes (LED's) . . . . . . . . . . . . . . 55
7.5 SD Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
8 Initial Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
8.1 Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
8.2 Starting the Quick Configuration Guide (QCG). . . . . . . . . . . . 57
8.3 Commissioning the Battery Current Sensor. . . . . . . . . . . . . . . . 60
9 Switching On and Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
9.1 Switching On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
9.2 Stopping the Sunny Island (Standby) . . . . . . . . . . . . . . . . . . . . 63
9.3 Switching Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

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9.4 Disconnecting the Device from Voltage Sources . . . . . . . . . . . 64
9.5 Reactivating the Device Following Automatic Shutdown . . . . . 64
10 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
10.1 Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
10.2 Changing Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
10.3 Direct Access - Direct Access to the Parameters . . . . . . . . . . . . 71
10.4 Compact Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
10.5 Entering the Installer Password . . . . . . . . . . . . . . . . . . . . . . . . . 76
10.6 Display Messages (Overview) . . . . . . . . . . . . . . . . . . . . . . . . . 77
10.7 Parameter Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
10.8 Display of Events. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
10.9 Display of Warnings and Failures. . . . . . . . . . . . . . . . . . . . . . . 82
11 Archiving Data on a SD Card . . . . . . . . . . . . . . . . . . . . . . 83
11.1 Inserting the Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
11.2 Removing the SC Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
11.3 Saving and Loading Parameters. . . . . . . . . . . . . . . . . . . . . . . . 87
11.4 Writing Log Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
11.5 Status Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
11.6 Updating the Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
12 Additional Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
12.1 Load Shedding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
12.2 Sleep Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
12.3 Time-Controlled Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
12.4 Overload and Short-Circuit Behavior . . . . . . . . . . . . . . . . . . . . 95
12.5 Device Faults and Autostart . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
12.6 Automatic Frequency Control (AFC). . . . . . . . . . . . . . . . . . . . . 95
12.7 Time-Controlled Standby. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

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12.8 Reaction in Case of Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
13 Battery Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
13.1 Battery Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
13.2 Start Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
13.3 State of Charge / SOC and SOH . . . . . . . . . . . . . . . . . . . . . . 98
13.4 Charge Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
13.4.1 Boost Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
13.4.2 Full Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
13.4.3 Equalization Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
13.4.4 Manual Equalization Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
13.4.5 Silent Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
13.5 Battery Preservation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
13.6 Battery Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
13.7 Battery Lead Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
14 Connecting External Sources . . . . . . . . . . . . . . . . . . . . . 107
14.1 Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
14.1.1 Connecting in Parallel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
14.1.2 Generator Start Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
14.1.3 Generator Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
14.1.4 Manual Generator Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
14.1.5 Automatic Generator Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
14.1.6 Limits and Power Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
14.1.7 Run Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
14.1.8 Operation Together with PV Inverters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
14.1.9 Stopping the Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
14.1.10 Disturbances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
14.2 Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
14.2.1 Voltage and Frequency Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
14.2.2 Starting the Sunny Island. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
14.2.3 Stand-Alone Grid Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123

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14.2.4 Grid Reconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
14.2.5 Grid Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
14.2.6 Grid Failure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
14.2.7 Disturbances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
14.2.8 Limits and Power Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
14.2.9 Operation Together with PV Inverters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
14.3 Generator and Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
15 Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
16 Multicluster Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . 132
16.1 Communication between the Sunny Island. . . . . . . . . . . . . . . 132
16.2 Initial Start-up of the Multicluster System. . . . . . . . . . . . . . . . . 135
16.3 Switching a Multicluster System On and Off . . . . . . . . . . . . . 136
16.3.1 Activation / Startup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
16.3.2 Stopping and Switching Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
16.4 Generator Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
16.5 Behavior with Different Charge States . . . . . . . . . . . . . . . . . . 137
16.6 Communication Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
16.7 Automatic Frequency Control (AFC). . . . . . . . . . . . . . . . . . . . 138
16.8 Updating the Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
16.9 Error Handling in a Multicluster System . . . . . . . . . . . . . . . . . 139
16.10 Grid Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
16.11 Generator Emergency Operation. . . . . . . . . . . . . . . . . . . . . . 139
17 PV Inverters in Stand-alone Grid Systems . . . . . . . . . . . 140
17.1 Setting Stand-alone Grid Operation. . . . . . . . . . . . . . . . . . . . 140
17.1.1 Setting via Rotary Switch with SB 3000TL/4000TL/5000TL. . . . . . . . . . . 141
17.1.2 Setting via Rotary Switch with SB 2000HF/2500HF/3000HF and
STP 10000TL/12000TL/15000TL/17000TL . . . . . . . . . . . . . . . . . . . . . . 141
17.1.3 Setting via Communication or Software . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
17.2 Use of SB 3000TL/4000TL/5000TL in 60 Hz Grids. . . . . . . 143

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17.3 Frequency Shift Power Control (FSPC) - Power Adjustment
of the PV Inverter via Frequency . . . . . . . . . . . . . . . . . . . . . . . 143
18 Maintenance and Care . . . . . . . . . . . . . . . . . . . . . . . . . . 145
18.1 Enclosure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
18.2 Cleaning the Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
18.3 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
18.4 Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
18.5 Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
18.6 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
19 Parameter lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
19.1 Display Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
19.1.1 Inverter Meters (110#) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
19.1.2 Battery Meters (120#) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
19.1.3 External Meters (130#) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
19.1.4 Charge Controller (140#) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
19.1.5 Battery Settings (220#). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
19.1.6 System Settings (250#). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
19.2 Adjustable Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
19.2.1 Inverter Settings (210#) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
19.2.2 Battery Settings (220#). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
19.2.3 External Settings (230#). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
19.2.4 Relay Settings (240#). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
19.2.5 System Settings (250#). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
19.2.6 Password Setting (280#) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
19.3 Diagnosis (300#) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
19.3.1 Inverter Diagnosis (310#). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
19.3.2 Battery Diagnosis (320#) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
19.3.3 External Diagnosis (330#) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 189
19.4 Events, Warnings and Errors (History) . . . . . . . . . . . . . . . . . . 190
19.4.1 Failure / Event (400#) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190

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19.5 Functions in Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
19.5.1 Operation (500#). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
19.6 Direct Access to the parameters . . . . . . . . . . . . . . . . . . . . . . . 193
19.6.1 Direct Access (600#) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 193
20 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
20.1 Failure Acknowledgement . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
20.2 Autostart Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
20.3 Master-Slave Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
20.4 Handling Pending Failures During the Booting Procedure . . .195
20.5 Display of Failures and Events . . . . . . . . . . . . . . . . . . . . . . . . 196
20.6 Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
20.6.1 Category INV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
20.6.2 Category BAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
20.6.3 Category GEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
20.6.4 Category GRD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
20.6.5 Category REL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
20.6.6 Category SYS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
20.7 Failure Categories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
20.8 Warnings and Failure Messages . . . . . . . . . . . . . . . . . . . . . . 202
20.8.1 Category INV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
20.8.2 Category BAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
20.8.3 Category EXT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
20.8.4 Category GEN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
20.8.5 Category GRD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
20.8.6 Category RLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
20.8.7 Category SYS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
20.8.8 AUX Category. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
20.9 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
20.10 What to Do during Emergency Charge Mode . . . . . . . . . . . . 213
21 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

Table of Contents SMA Solar Technology AG
10 SI5048-TB-TEN110340 Technical Description
22 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
23 Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

SMA Solar Technology AG Notes on this Manual
Technical Description SI5048-TB-TEN110340 11
1 Notes on this Manual
This manual describes the functionality, assembly, electrical connections and operation of the Sunny
Island 5048. Keep this guide in a convenient place for future reference.
1.1 Validity
This manual is valid for the Sunny Island 5048 (SI 5048), firmware version 5.0 and later.
1.2 Target Group
This manual is exclusively for electrically skilled persons. The tasks described in this manual may be
performed by electrically skilled persons only.
1.3 Additional Information
You will find further information on special topics such as selecting and using PV inverters in off-grid
systems in the download area at www.SMA.de/en.
1.4 Nomenclature
The syntax specified here for menus and parameters applies throughout the entire manual:
Menu: Menu number, hash and menu name (150# Compact Meters)
Parameter: Menu number, dot, parameter number and parameter name (150.01 GdRmgTm)

Notes on this Manual SMA Solar Technology AG
12 SI5048-TB-TEN110340 Technical Description
1.5 Symbols Used
DANGER!
"DANGER" indicates a hazardous situation which, if not avoided, will result in death or
serious injury.
WARNING!
"WARNING" indicates a hazardous situation which, if not avoided, could result in death
or serious injury.
CAUTION!
"CAUTION" indicates a hazardous situation which, if not avoided, could result in minor or
moderate injury.
NOTICE!
"NOTICE" indicates a situation that can result in property damage, if not avoided.
Information
Information provides tips that are valuable for the optimal installation and operation of
your product.

SMA Solar Technology AG The Sunny Island 5048
Technical Description SI5048-TB-TEN110340 13
2 The Sunny Island 5048
2.1 Properties
The Sunny Island 5048 is a bidirectional inverter (battery inverter and charger) for stand-alone
systems. The Sunny Island supplies consumers on the stand-alone grid side and charges battery banks
with the energy from grid-feeding units connected on the AC side.
The comfortable support of AC and DC coupling, as well as the expandability of the systems formed
with the Sunny Island guarantee highest flexibility. In addition, innovative technology allows the
Sunny Island to achieve a maximum efficiency of more than 95 %. Optimized for partial load
operation, it impresses with low open-circuit and standby consumption. Due to the high overload
capabilities and the integrated output management, there is no need to oversize the Sunny Island.
The parallel operation of up to 3 devices on a single phase system or 3 devices on a three-phase
system enables the Sunny Island to be used to set up stand-alone grid supply systems with output
power of 3 kW … 26 kW and up to 300 kW in Multicluster systems. Thanks to its sophisticated
generator management, it can control connected diesel generators in a particularly gentle and fuel-
saving manner. The power distribution grid can also be integrated. The Sunny Island can also
deactivate loads automatically if the battery does not provide sufficient electrical energy.
The stand-alone grid's critical component, the battery, is monitored diligently and optimally utilized.
The intelligent battery management precisely records the battery's state of charge. This makes
possible an improved utilization of the battery capacity, which also means that smaller and thus more
cost-effective batteries can be used without affecting performance.
In order to prevent premature aging caused by incorrect charging and frequent deep discharge, the
Sunny Island has an intelligent charge control and reliable deep discharge protection. Thanks to these
functions, the battery life can be greatly extended in comparison with simpler devices.
Despite its complex functioning, the Sunny Island is easy to configure. All the settings required for
operation can be quickly and easily programmed in a few steps using the "Quick Configuration
Guide". By employing the concept of central operation referred to as "Single Point of Operation", the
system/cluster parameters are only set on the master device, and all other devices adopt the
configuration automatically. The easy-to-understand menu navigation allows quick access to all
important data, even while the system is running. An SD card provides uncomplicated system control,
and thus facilitates any service work.
The Sunny Island monitors the set voltage and frequency limits on the grid and generator. If these limits
are not observed, it disconnects from the external source with virtually no interruption and changes to
stand-alone grid operation. The Sunny Island 5048 also has an integrated anti-islanding feature. This
is a protective procedure for preventing unintended islanding on the generator and/or external
power supply line point.
Saving Data and Events
Always use the SD card to save data and events. This way, in case of a failure, SMA Solar
Technology can help you quickly.

The Sunny Island 5048 SMA Solar Technology AG
14 SI5048-TB-TEN110340 Technical Description
The anti-islanding procedure is required in order to ensure that, in case of a power distribution grid
failure or generator failure, the Sunny Island reliably prevents possible reverse voltages in these
power supply units. In case of a power distribution grid failure, Sunny Island disconnects from the grid
and continues supplying the the loads.
The Sunny Island can be integrated into different system constellations. The following graphics show
the Sunny Island's system components and the different wiring options (single-phase / single-phase
parallel and three-phase).

SMA Solar Technology AG The Sunny Island 5048
Technical Description SI5048-TB-TEN110340 15
Components of a Sunny Island System

The Sunny Island 5048 SMA Solar Technology AG
16 SI5048-TB-TEN110340 Technical Description
Single-phase and single-phase parallel system:

SMA Solar Technology AG The Sunny Island 5048
Technical Description SI5048-TB-TEN110340 17
Three-phase system (cluster):
120
SMA Multicluster technology
Refer to the manual of the Multicluster Box for information about SMA Multicluster
Technology.

The Sunny Island 5048 SMA Solar Technology AG
18 SI5048-TB-TEN110340 Technical Description
2.2 At a glance
The following figure provides an overview of all control elements and connections of the Sunny Island:

SMA Solar Technology AG The Sunny Island 5048
Technical Description SI5048-TB-TEN110340 19
Position Description
A Display
B LEDs showing device operation
C Control buttons
D Slot for the SD card
E Connection area for additional connections
FDC connection area
GAC connection area
HDC circuit breaker

The Sunny Island 5048 SMA Solar Technology AG
20 SI5048-TB-TEN110340 Technical Description
2.3 Scope of delivery
Check that the delivery is complete. Check the packaging and the Sunny Island for externally visible
damage.
Contact your supplier in case of damage to the packaging. Please contact your dealer if you find any
damage to the Sunny Island or if the delivery is incomplete.
Position Quantity Description
A 1 Sunny Island
B 2 Ventilation grid
C 1 Wall mounting bracket
D 1 Battery temperature sensor
E 1 Technical description
F1Document set
G 2 M32 cable gland
H 2 Counter nut for M32 cable gland
I 2 M25 cable gland
J 2 Counter nut for M25 cable gland
K 2 M20 cable gland
L 2 Counter nut for M20 cable gland
M 1 Filler plug
N 2 4-pole print terminal for connecting the battery temperature and
current sensors