SMA SI 5048 - Procedure During Emergency Charge Mode

SMA Solar Technology AG Troubleshooting
Technical Description SI5048-TEN093630 201
20.10 Procedure During Emergency Charge Mode
The Sunny Island cannot provide voltage with full amplitude with a deeply discharged battery and
can no longer synchronize with an existing grid or generator. Using the emergency charge mode
(ECM), it is possible to charge the batteries in current-controlled mode.
To charge the batteries in the emergency charge mode, either bridge the AC1 with AC2
(for a stationary generator) or connect a portable generator directly to AC1.
All loads must be disconnected in emergency charge mode.
Emergency charge mode is activated in the QCG. For a description how to access the QCG see
section 8.2”Starting the Quick Configuration Guide (QCG)” (page55). Follow the instructions up to
point 2. The emergency charge mode is described below.
1. Choose "Emerg Charge" in QCG with <ENTER>.
2. Confirm the following view with <ENTER>.
3. Set the maximum external current, e.g.,
the generator current.
4. Confirm the set value with <ENTER>.
Battery Management
The battery management is active and the current set battery parameters and the current
charging phase are used. These values can be changed in "normal operation".
Generator and Grid Management
In emergency charge mode, the generator management and grid management are not
active. Reverse power protection and relay protection are also not active.
AC1 and AC2 are bridged
In case that AC1 and AC2 have been bridged the generator should be connected and
then manually started. Otherwise, it is possible that the magnetizing current trips the
generator fuse. (This can also happen when connecting the relay without using a bridge.)