SUNNY ISLAND 5048 - Technical Description - Wind & Sun Ltd.

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Battery Management SMA Solar Technology AG 13.5 Battery Preservation Mode The Sunny Island has a sophisticated battery preservation mode. The battery preservation mode prevents deep discharge from the battery as far as possible when the energy supply is low, thus preventing a total system failure as well as damage to the battery. The battery preservation mode has three levels that are activated as a result of the state of charge (when the charge falls below the respective limit, "223.05 BatPro1Soc", "223.06 BatPro2Soc" and "223.07 BatPro3Soc" parameter): Level 1: The first level is used to switch the Sunny Island into standby mode at times when the energy is not necessarily required (e.g., at night). You define the start time using the "223.01 BatPro1TmStr" parameter and the stop time using the "223.02 BatPro1TmStp" parameter. Level 2: The second level of the battery preservation mode ensures that the Sunny Island is started regularly every two hours only in the time period during which energy supply is expected, and that it attempts to charge the battery from the AC side. In case of photovoltaic plants, this time is during the day. In this case, you define the start time using the parameter "223.03 BatPro2TmStr" and the stop time using the parameter "223.04 BatPro2TmStp". Level 3: The third level ensures that the battery is protected from deep discharge and thus protected against damage. In this case, the Sunny Island is switched off completely. To start it, see section 9.5 ”Reactivating the Device Following Automatic Shutdown” (page 64). At all three levels, the Sunny Island is stopped only if no battery current flows within 6 minutes (limit: 3 A charging current). 104 SI5048-TB-TEN110340 Technical Description
SMA Solar Technology AG Battery Management The limits for all three levels can be set independently from each other. This allows individual levels to be skipped. Parameter BatPro1Soc < BatPro2Soc If the BatPro1Soc parameter < BatPro2Soc, level 1 is skipped and only level 2 is carried out. For level 1 and 2, a hysteresis of 5 % of the SOC state of charge is designated for exiting this state. Battery preservation mode LBM1 and LBM2 are automatically exited if an external voltage source (grid reconnection/generator start) is present. The battery preservation mode can be exited by manually starting the Sunny Island. If, within 5 minutes (see above), charging current is detected, the Sunny Island continues to operate; otherwise, it switches off again. 13.6 Battery Diagnostics The "320# Battery Diagnosis" menu displays several values that provide information on the past operational behavior of the battery. These values are helpful in checking the efficiency of the set parameters and in viewing the typical operating conditions of the battery (see section 19.3 ”Diagnosis (300#)” (page 182)). Technical Description SI5048-TB-TEN110340 105
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Off-Grid Inverter SUNNY ISLAND 5048
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Table of Contents SMA Solar Technol
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Notes on this Manual SMA Solar Tech
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The Sunny Island 5048 SMA Solar Tec
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Safety Instructions SMA Solar Techn
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Mounting SMA Solar Technology AG 4
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Mounting SMA Solar Technology AG 4.
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Opening and Closing SMA Solar Techn
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Electrical Connection SMA Solar Tec
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Page 84 and 85: Archiving Data on a SD Card SMA Sol
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Parameter lists SMA Solar Technolog
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Troubleshooting SMA Solar Technolog
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Accessories SMA Solar Technology AG
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Technical Data SMA Solar Technology
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Contact SMA Solar Technology AG 23
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