SMA SUNNY BOY 2000HF - Connecting the PV Generator (DC)

SMA Solar Technology AG Electrical Connection
Installation Guide SB20_25_30HF-IEN102911 49
6.3.4 Connecting the PV Generator (DC)
1. Disconnect the line circuit breaker and secure against re-connection.
2. Check the connection cables of the PV modules for
correct polarity and that the maximum input voltage
of the inverter is not exceeded.
At an ambient temperature above 10 °C, the open
circuit voltage of the PV modules must not be more
than 90 % of the maximum inverter input voltage.
Otherwise, check the system design and the
PVmodule connection. If this is not done, the
maximum inverter input voltage can be exceeded
at low ambient temperatures.
3. Check the strings for ground faults, as described in section 11.1”Checking the PV Generator
for a Ground Fault” (page74).
DANGER!
Danger to life due to high voltages in the inverter.
• Before connecting the PV generator, ensure that the AC line circuit breaker is
switched off and that it cannot be reactivated.
NOTICE!
Excessive voltages can destroy the measuring device.
• Only use measuring devices with a DC input voltage range up to at least 1,000 V.
NOTICE!
Destruction of the inverter due to overvoltage.
If the voltage of the PV modules exceeds the maximum input voltage of the inverter, it can
be destroyed by the overvoltage. All warranty claims become void.
• Do not connect strings with an open circuit voltage greater than the maximum input
voltage of the inverter.
• Check the system design.