Go Power GP-PWM-10 User Manual page 18

Topic Issue
Current reading
shows 0A at
daytime, with
clear sunny
skies
Problems
Current reading
with the
is less than
expected at
Current
daytime, with
clear sunny
skies
page 18 | gpelectric.com
Possible Cause
Current is being limited 1. The State of Charge (SOC)
below 1A as per normal
operation or poor
connection between
solar array and
controller.
2. With the solar array in
3. If there is no reading at
1. Current is being 1. Battery State of Charge
limited below 1A
as per normal
operation.
2. Incorrect series/
parallel configuration 2. Check that the modules and
and/or wiring
connections and/or
wire gauge.
3. Dirty or shaded 3. Modules look dirty, overhead
module or lack of
sun.
4. Blown diode in solar
module when two 4. Disconnect array wires from
or more modules
are connected in
parallel.
Troubleshooting Problems
How to Tell
screen is close to 100% and
the Sun and Battery icon
are present with an arrow
between.
sunlight, check voltage at
the controller solar array
terminals with a voltmeter.
the controller solar array
terminals, the problem is
somewhere in the wiring
from the solar array to the
controller.
screen is close to 100% and
the Sun and Battery icon
are present with an arrow in
between.
batteries are configured
correctly. Check all wiring
connections.
object is shading modules or
it is an overcast day in which
a shadow cannot be cast.
the controller. Take a voltage
reading between the positive
and negative array wire. A
12-volt array should have an
open circuit voltage between
17 and 22 volts.
Remedy
Check all connections from
the controller to the array
including checking for correct
wire polarity. Check that all
connections are clean, tight
and secure. Continue with the
solutions below for additional
help on low current readings.
Reconnect in correct
configuration. Tighten all
connections. Check wire
gauge and length of wire run.
If dirty or obstructed, clean
modules, clear obstruction or
wait for conditions to clear.
If the open circuit voltage
of a non-connected 12-volt
array is lower than the
manufacturer's specifications,
the module may be faulty.
Contact the Go Power!
Technical Support team as
listed in section 10.1 for
assistance.