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

Electrical Connection SMA Solar Technology AG
46 SB20HF-30HF-IA-IEN120431 Installation Manual
6.4.4 Connecting the PV Array (DC)
1. Disconnect the miniature circuit‑breaker and secure against re‑connection.
2. Make sure that the inverter has been secured with the connection element in order to prevent it
from being lifted out, as per section 4.3"Mounting the Inverter with the Wall Mounting Bracket"
(page17).
3. Check the connection cable of the PV modules for
correct polarity and make sure 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 plant design and the
PV module connection. If this is not done, the
maximum input voltage of the inverter can be
exceeded at low ambient temperatures.
4. Check the strings for ground faults as described in section 11.1"Checking the PV Array for
Ground Faults" (page72).
DANGER!
Danger to life due to high voltages in the inverter.
• Before connecting the PV array, ensure that the AC miniature 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. This will void all warranty claims.
• Do not connect strings with an open‑circuit voltage greater than the maximum input
voltage of the inverter.
• Check the plant design.