Manual Equalization Charge; Silent Mode - SMA Sunny Island 5048 Installation Instructions Manual

SMA
Technologie AG Battery Management
If, after a specific time of boost charging or full charging has elapsed, the Sunny
Island 5048 switches to an equalization charge, all of this time is taken into
account during the equalization charge.
If, during an equalization charge, more than 1 % of the nominal battery capacity
is discharged, then 50 % of the elapsed time is taken into consideration during the
next constant voltage phase.
If an external charging device or a charge control is connected to the battery and
the criteria for an equalization charge are satisfied by the external charge, then
the Sunny Island 5048 treats this as if it had performed the equalization charge
itself.

13.4.4 Manual Equalization Charge

An equalization charge can be manually triggered for the Sunny Island 5048 at any
time using the "#420.01 ManChrgSel" parameter. The equalization charge is activated
once the manual equalization charge has been manually confirmed. If the generator is
connected to the system, it is automatically started and stopped again once the
equalization charge has been completed.
An equalization charge should be performed at least once a year. Following a
long period of time without charging, for example, with systems that are only
operated seasonally, a manual equalization charge must always be performed at
the end or beginning of the season.

13.4.5 Silent Mode

In addition to the float charge, the silent mode can only be used when the device is
operating on the public grid ("#224.01 SilentEna" parameter). The main purpose of the
silent mode is that in grid backup systems, where the Sunny Island 5048 is
predominantly in float charge, energy can be saved by switching from charge mode to
standby mode.
The silent mode is activated if the set time ("#224.02 SilentTmFlo" parameter) for the
float charge has expired. The Sunny Island 5048 remains in silent mode for a fixed time
("#224.03 SilentTmMax" parameter) or until the battery voltage per cell is 0.14 V
lower than the set voltage ("#222.10 ChrgVtgFlo" parameter). This ensures that the
battery is always fully charged, even in silent mode. If a grid dropout is detected during
silent mode, the Sunny Island 5048 makes a stand-alone grid available within a few
milliseconds. The loads are supplied with power almost without interruption.
Technical Description SI5048-11:EE4206 Page 91