SMA SUNNY ISLAND 4.4M Operating Manual page 13

SMA Solar Technology AG
Danger to life due to electric shock caused by incorrect connection to the grounding conductor terminals
Only the grounding conductors of the AC power cable may be connected to the grounding conductor terminals of
the inverter. When connecting the battery grounding to the grounding conductor terminals, life-threatening voltages
might be present on the enclosure of the inverter
• Have the inverter and the battery mounted, installed and commissioned only by qualified persons with the
appropriate skills.
• Observe all safety information of the battery manufacturer.
• Ground the battery according to the battery manufacturer's requirements.
• If the locally applicable standards and directives require battery grounding, connect the battery grounding to
the grounding busbar in the distributor.
Danger to life from electric shock due to circuit breakers that cannot be tripped
In an off-grid system and battery-backup system, only the circuit breakers that can be tripped by the Sunny Island
can be tripped in the event of a grid failure. Circuit breakers with a higher operating current cannot be tripped.
Under fault conditions, a voltage that poses a danger to life may be present on accessible parts for several seconds.
• Check if a circuit breaker has a higher trip characteristic than the following circuit breakers which can be
tripped:
– SI4.4M-12: circuit breaker with trip characteristic B6 (B6A)
– SI6.0H-12 and SI8.0H-12: circuit breaker with trip characteristic B16 (B16A) or circuit breaker with trip
characteristic C6 (C6A)
• If a circuit breaker has a higher trip characteristic than the specified circuit breakers that can be tripped, you
should also install a residual-current device of type A.
Danger to life from electric shock due to overvoltages
Overvoltages of up to 1500 V can occur in the stand-alone grid and in the battery-backup grid. If the connected
loads have not been designed for these overvoltages, a voltage that poses a danger to life may be present on
accessible parts for several seconds.
• Only connect loads that have a CE, RCM or UL designation. Loads with a CE, RCM or UL designation are
designed for overvoltages of up to 1500 V.
• Operate the loads only when they are technically faultless and in an operationally safe state.
• Check the loads regularly for visible damage.
Danger to life from electric shock due to damaged inverter
Operating a damaged inverter can lead to hazardous situations that can result in death or serious injuries due to
electric shock.
• Only use the inverter when it is technically faultless and in an operationally safe state.
• Check the inverter regularly for visible damage.
• Make sure that all external safety equipment is freely accessible at all times.
• Make sure that all safety equipment is in good working order at any time.
Operating Manual SI44M-80H-12-BE-en-10
2 Safety
13