SMA Sunny Island 5048 Installation Instructions Manual page 64

Activation and Deactivation
You must wait at least one minute to allow the capacitors to completely
discharge before switching the DC circuit breaker on again.
2. After waiting for one minute, switch on the Sunny Island 5048 by switching the DC
circuit breaker to the "ON" position.
If, in rare cases, the device cannot be switched back on, wait a little longer and
try it again. This may result due to component tolerances.
3. Now, continue as described in 9.1 "Activation / Startup" (Page 61).
After reactivation, it is important that the batteries are charged. If an autostart
generator is present in the stand-alone grid, the Sunny Island 5048 will request
the generator after a few minutes.
4. Monitor the generator startup and check that the Sunny Island 5048 switches to
charge mode.
5. Check that all other energy generators in your system are also working correctly.
If, after reactivation, the Sunny Island 5048 immediately switches into battery
preservation mode (see section 13.5 "Battery preservation mode" (Page 92)),
disconnect all loads from the AC output (AC1 and AC2).
The loads can be reconnected once the Sunny Island 5048 enters charge mode.
A precondition for this is that a generator capable of providing the required
power is connected.
Further information is provided in section 19.10 "Procedure During Emergency
Charge Mode" (Page 152).
Installation of the load shedding system is strongly recommended in
systems with extensive AC-side coupling of solar power or wind power.
This is the only way to achieve safe operation of the system, even in cases
of low energy generation or very high consumption.
Only switch the loads off, never switch the generators off (e.g. Sunny
Boys)!
Page 64 SI5048-11:EE4206
SMA
Technologie AG
Technical Description