Battery Diagnostics - SMA Sunny Island 5048 Installation Instructions Manual

SMA
Technologie AG Battery Management
The limits for all three levels can be set independently of one another. This allows
individual levels to be skipped.
If the BatPro1Soc parameter < BatPro2Soc, level 1 is skipped and only level 2 is
performed.
For level 1 and 2, a hysteresis of 5 % of the SOC charge level is designated for exiting
this state.
The battery preservation mode is exited if there is an external voltage source on AC2.
However, this function is no longer active if the Sunny Island 5048 has completely
switched off in level 3.
The battery preservation mode on the Sunny Island 5048 can be exited by manually
starting the device. If, within 5 minutes (see above), charging current is detected, the
Sunny Island 5048 continues to operate; otherwise, it switches off again.
In inverter mode, the Sunny Island 5048 charges the battery with 25 W. If the
device is in standby mode, only the on-board power supply, which requires
approx. 4 W, is powered. This results in a savings of 21 W.
Using the conditions described in level 1 of the battery preservation mode for
conversion purposes and assuming an operation time from 6 a.m. to 10 p.m., that
results in 336 Wh/day. That in turn corresponds to 7 Ah at 48 V and thus 210 Ah
per month (30 days).

13.6 Battery Diagnostics

In the menu "#342 Statistic Battery", many values are displayed 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 18.3 "Diagnostics" (Page 138)).
Technical Description SI5048-11:EE4206 Page 93