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3. Ensure correct polarity of the PV Strings before terminating
the DC source circuits. Referring to Figure 3-22, the wiring
from the PV string pairs must be checked according to the
following steps:
A. Use a multi-meter to measure the PV strings’ conductor
ends and check the polarity.
B. The positive (+) terminal of the conductor should match the
positive (+) terminal of inverter’s DC input.
C. The negative (-) terminal of the conductor should match
the negative (-) terminal of inverter’s DC input.
Figure 3-22 Polarity Check
NOTICE:
It is important to use a multi-meter to check the polarity of the DC
source circuit conductors to avoid any risk of reverse polarity.
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