Copyright Bosch Solar Energy Corp., version 1.0
Page 13 of 19
See Figure 7A below for more information. Modules are interconnected by inserting the
plug from one module into the receptacle of the next module in the array string. Secure the mated
connector pair to the inside flange of the module frame to protect it from damage. For added
safety, Bosch Solar Energy modules feature locking connectors that require a tool for
disconnection.
Figure 7A: Overview of Module Junction Box and Cables
Wiring Considerations
Always use cables and connection techniques consistent with the anticipated environmental
conditions and applicable codes related to the installation. For wiring that is exposed to
weather, select conductor cable that is sunlight (UV) resistance and that offers a minimum
rating of 90 °C (194 °F). Bosch recommends that all wiring be double insulated, use flexible
copper (Cu) conductors at least 3mm
2
in diameter (AWG 12) and rated as USE-2 or equivalent.
The module cables should also be attached and supported to ensure adequate strain relief. If
cables are installed within a building then they should be installed in metallic cable conduits.
CAUTION
When selecting the minimum current carrying capacity of the cable please refer to the typical
short circuit current (Isc) rating
*
and multiply this by 1.56 times the number of solar modules
connected in parallel. Note that further safety factors may be required depending upon the
ambient temperature of the installation and the means of installation of the cables (e.g. conduit
installation). Refer to the local standards to ensure full compliance with legislation.
CAUTION
Under normal conditions, a photovoltaic module is likely to experience conditions that produce
more current and/or voltage than reported at Standard Test Conditions. Accordingly, the values
of Isc and Voc marked on this module
*
should be multiplied by a factor of 1.25 when
determining component voltage ratings, conductor ampacities, fuse sizes, and size of controls
connected to the PV output. Refer to Section 690-8 of the National Electrical Code for an
additional multiplying factor of 125 percent (80 percent derating) which may be applicable.
*
Please note the following:
the Isc and Voc ratings are printed on the product data sheet as
well as the label adhered to the rear side of the solar module
