Product Manual

8
5. Electrical Installation
This guide describes some of the most important typical uses as representative examples.
5.1 Grid-connected electrical system
The DC electrical energy generated by photovoltaic systems may also be converted to AC and connected to a utility grid system. As
local utilities’policies on connecting renewable energy systems to their grids vary from region to region.
Consult a qualified system designer or integrator to design such a system. Permits are normally required for installing such a system
and the utility must formally approve and inspect such a system before it can be accepted
5.2 Grounding
The module frame must be properly grounded. The grounding wire must be properly fastened to the module frame to assure good
electrical contact. Use the recommended type, or an equivalent, connector for this wire.
If the support frame is made of metal, the surface of the frame must be electroplated and have excellent conductivity.
We recommend the lay-in lug(Cat. No. GBL4-DBT is recommended by producer) when grounding. First strip 16mm insulating jacket
from the end of the ground wire carefully to avoid nicking or cutting conductors, insert the wire to the feet of the lug (see the picture), and
screw down the slotted screw. Be careful not to damage the wire core. And then tighten up the screw.
Insert ground wire here
Next, assemble the recommended ILSCO grounding lug to the aluminum frame using stainless steel M3 or M5 screw and hardware as
shown below. Note: there are two different size grounding holes, the smaller of which is being phased out. Further, buildup of hardware
for mounting the grounding lug are the same—except for the M3 screw, an added lat washer is mounted directly under the M3 screw
head. The star washer is fitted directly under the grounding lug and makes electrical contact by penetrating the anodized coating of the
aluminum frame, The screw assembly is further fitted with a lat washer, then a split lock washer and finally a nut to secure the entire
assembly, as shown. Recommended torque of M3 or M5 screw assembly is 0.8NM or 1.5 NM.
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