4.
The metal frame of each module from the photovoltaic array must me grounded by a continuous
conductor with no splices.
5.
Copper wire must never come in direct contact with the aluminum PV frame to avoid galvanic
corrosion.
6.
SOLARSOL always recommends the use of connectors made of stainless steel material to avoid
corrosion. A galvanic corrosion resistant coating must protect all non-stainless- steel connectors
between the module frame and the EGC.
7.
The EGC must reach the enclosure where the DC disconnect and the general ground bus are located.
8.
If the PV output circuit has a grounding conductor, the grounding connection must be located only on
the local ground bus; then the ground bus must connect to the grounding electrode. It is convenient
that the grounding bus and the PV circuit DC disconnect are in the same enclosure.
9.
The junction point between the grounding connector bus and the grounding electrode must be weld
with exothermic or high-temperature welding. Do not use pressure screws for this type of connection.
All grounding measures must comply with the local electrical codes and regulations depending on the geographical
location of the PV modules installation.
Grounding methods suggested by SOLARSOL:
Please note that all the methods should remove the anodizing surface of the grounding holes and/or the aluminum
frame surface. Failure in doing this may cause a poor or none grounding connection.
Option 1: Screw Grounding
Required material and composition structure:
M4 or #10 SS Screw
M4 SS Flat washer
Grounding conductor
M4 SS Cup washer
M4 SS Toothed washer
