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C. Electrical and Optical Safety
Photovoltaic (PV) modules generate electricity whenever they are exposed to light. Lethal voltages
and/or a shock hazard may be present in photovoltaic modules and arrays even during sunlight hours
and even at low light levels. This hazard increases when multiple modules are connected together to
provide higher system voltage or current levels. Dangerous voltages may also be present at night
from connections to batteries and feedback from inverters or other system components.
Cover the front surface of the modules with an opaque material to prevent the modules from
generating electricity. Ensure that both the front and back surfaces of the module and the sheaths of
the connecting cables are undamaged.
Improper electrical connections can result in electrical arcing which can ignite any flammable material
located in close proximity. When flammable material is within 30 cm (12 in.) of either the solar
module or any of the electrical connections then install an appropriate flame barrier to prevent
potential risks of fire.
CAUTION: Always adhere to the following installation precautions:
•
DO NOT damage, pull, bend or place heavy loads on the cables
•
DO NOT connect the cables if the terminals are wet
•
DO NOT disconnect module cables under electrical load
•
DO NOT attempt to open the diode housing or junction box located on the back side of any
Bosch Solar Energy module. There are no user serviceable parts inside. Opening the
junction box may expose the individual to an electrical shock hazard and will void the
warranty.
•
Remove any jewellery or other metallic ad ornme nts to av oid accidental electr ical
contact and use insulated tools
•
A t w o-person team is to be used while performing field work on all energized equipment
where the system open circuit voltage is 30 volts or greater.
•
Wear electrical insulating gloves rated at 1000 volts and suitable eye protection
when working on systems where the system open circuit voltage is 30 volts or greater.
•
DO NOT touch terminals while the module is exposed to light without wearing electrical
insulating gloves.
•
DO NOT connect or disconnect a module unless the array string is open- circuited or
all of the modules in the string are covered.
•
Prevent sunlight from being concentrated or reflected artificially onto a solar module. In
particular, do not use any concentrating lenses or mirrors.
D. Fire Safety
The Bosch Solar Energy c-Si M60 NA 30119 modules have been certified by Underwriters
Laboratories to comply with UL1703 Class C fire rating. To satisfy the conditions of this rating when
installing on a building, you must mount the modules using standoff or rack methods over a fire
resistant roof covering rated for the application. The module listing may not apply if the modules are
mounted integral to the roof or wall of a building, and does not cover marine or vehicle applications.
Refer to your local authority for guidelines and requirements of building or structural fire safety.
Copyright Bosch Solar Energy Corp., version 1.0
Page 6 of 19
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