
[page 6] | gpelectric.com
GENERAL INFORMATION
2.2 CAUTIONS
Note
Disconnect all power sources
before attempting installation
Electricity can be very dangerous. It is critical that the electrical layout and
installation of the photovoltaic system be completed by an electrician or quali-
ed personnel and in compliance with the detailed procedures in this manual.
Solar panel safety
Photovoltaic panels generate DC electricity when exposed to sunlight or other
light sources. Contact with the electrically active parts of the panel, such as
terminals, can result in burns, sparks and lethal shock whether the panel is
connected or disconnected.
When panels are connected in parallel, amperages are additive. Consequently,
a system assembled from photovoltaic panels can produce high amperages,
which constitute an increased hazard. Do not touch terminals while panel is
exposed to light. Cover the panel face completely with opaque material to halt
the production of electricity when installing or working with panels or wiring.
Systems must be handled with extreme caution — failure to do so may
result in possible injury or death.
Battery and wiring safety
Observe all safety precautions of the battery manufacturer when handling or
working around batteries. When charging, batteries produce hydrogen gas,
which is highly explosive. Work in a well ventilated area and use caution when
making or removing electrical connections. Ensure wires are disconnected from
their power sources when wiring. Do not expose battery to open ame, cigarettes
or sparks. Shield skin and eyes from battery acid. Cable leads should not be
crossed or shorted together. If shorting occurs, completely cover the panel with
a dark, light-proof material BEFORE disconnecting the cables. Modules must
not be connected or disconnected when there is a current source attached, or
when the module is exposed to light.
Ensure all connections are tight and secure. Loose connections may generate
sparks, heat and in extreme cases may catch re. Be sure to check connections
one week after installation to ensure they are still tight.
Work safely
Wear protective eye wear and appropriate clothing during installation. Use
extreme caution when working with electricity and when handling and working
around batteries. Use properly insulated tools only.
Do not carry the panels by the junction box or by the electrical cables. Do not
walk on the panels. Do not handle or install modules when they are wet or in
windy conditions. Do not allow standing water to accumulate on the module.
Go Power! recommends a minimum cable bend radius equal to or greater
than 40 mm (1.5”).
Observe correct polarity
at all times
Reverse polarity of the battery terminals will cause the controller to give a
warning tone. Reverse connection of the array will not cause an alarm but
the controller will not function. Failure to correct this fault could damage the
controller.
Do not exceed the voltage
and current ratings of the
Solar Controller
The total current of the solar system is the sum of the short circuit current of
the solar panels in parallel, multiplied by a safety factor of 1.25. The resulting
system current is not to exceed the amperage rating of the controller. The
voltage of the array is the rated open circuit voltage of the solar panels and is
not to exceed 28volts.
The current rating of the solar system is the sum of the Maximum Power Cur-
rent (Imp) of the solar PV strings in parallel. The resulting system Imp current
is not to exceed 30A. If your solar system exceeds these ratings, contact your
dealer for a suitable controller alternative.