SMA America, LLC
Switching On and Off
Technical Description
SI5048U-TUS121440
75
To reactivate the Sunny Island after it has switched off due to a battery being too deeply discharged,
proceed as follows:
1. Switch the Sunny Island's DC circuit breaker to the ”OFF” position.
2. Wait at least 15 minutes.
3. Switch the Sunny Island's DC circuit breaker to the ”ON” position.
☑ The Sunny Island's display lights up.
4. Switch on the Sunny Island as described in section 9.1 ”Switching on” (page 72).
5. Monitor the generator startup and check that the Sunny Island switches to charge mode.
6. Check for error-free functioning of all other energy generators in the system.
DANGER
Danger to life due to high voltages in the Sunny Island. Risk of death or serious injury due
to electric shock.
After an automatic disconnection, high residual voltages can remain in the Sunny Island
capacitors.
• Wait at least 15 minutes before restarting the Sunny Island. The Sunny Island
capacitors discharge in this time.
Switching on the DC Circuit Breaker
If, in rare cases, the device cannot be switched back on after 30 minutes, wait a little longer
and try it again.
Charging the Batteries
After reactivation, it is important that the batteries are charged. If an autostart generator is
present in the off-grid power system, the Sunny Island will request the generator after a few
minutes.
Battery Preservation Mode after Reactivation
If, after reactivation, the Sunny Island immediately switches into battery preservation mode
(see section 13.5 ”Battery Preservation Mode” (page 111)), disconnect all loads from the
AC output.
The loads can be reconnected once the Sunny Island enters charge mode. A precondition
for this is that a generator capable of providing the required power is connected.
For more information refer to section 20.10 ”Procedure During Emergency Charge Mode”
(page 212).
