Problems With Current - Go Power GPR-25 Owner's Manual

GPR-25 Regulator
Owner's Manual |

10.3 Problems with Current

Voltage Reading: N/A
Current Reading: Less than expected
Possible Cause:
(1) Wrong series/parallel configuration and/or wiring connections and/or wire gauge.
(2) Dirty or shaded module or lack of sun.
(3) Blown diode in solar module when two or more modules are connected in parallel.
How to tell:
(1) Check that the modules and batteries are configured correctly. Check all wiring connections.
(2) Modules look dirty, overhead object is shading modules or it is an overcast day in which a shadow
cannot be cast. Note: Avoid any shading no matter how small. An object as small as a broomstick
held across the solar module may cause the power output to be cut to almost nil. Overcast days may
also cut the power output of the module to almost nil.
(3) Disconnect one or both array wires from the regulator. Take a voltage reading between the
and negative array wire. A single 12 volt module should have an open circuit voltage between 18 and
22 volts. If you have more than one module, you will need to conduct this test between the positive
and negative terminals of each module junction box with either the positive or negative wires
disconnected from the terminal.
Remedy:
(1) Reconnect in correct configuration. Tighten all connections. Check wire gauge and length of wire run.
Refer to Suggested Minimum Wire Gauge in section 5.
(2) Clean modules, clear obstruction or wait for conditions to clear.
(3) If the voltage of a non-connected module (open circuit) is lower than 15 volts, contact the
manufacturer.
Voltage Reading: N/A
Current Reading: Zero
Possible Cause:
(1) Wrong series/parallel configuration and/or wiring connections.
(2) Shaded module or overcast conditions.
(3) Blown diode in module.
How to tell:
(1) Check that modules and batteries are configured correctly and the negative solar and battery
are connected directly to the regulator. Check all wiring connections
(2) An object is shading modules or it is an overcast day in which a shadow cannot be cast.
(3) Disconnect one or both array wires from the regulator. Take a voltage reading between the
and negative array wire. A 12 volt module should have an open circuit voltage between 18 and 22
volts. If you have more than one module, you may need to conduct this test between the positive
and negative terminals of each module junction box with either the positive or negative wires
disconnected from the terminal.
Remedy:
(1) Reconnect in correct configuration. Tighten all connections.
(2) Clear obstruction or wait for conditions to clear.
(3) If the voltage of a non-connected module (open circuit) is lower than 15 volts, contact the
manufacturer
Voltage Reading: N/A
Current Reading: Erratic
Possible Cause:
(1) Battery or fuse connection.
(2) Electric noise.
10
Carmanah Technologies Corp. Copyright © 2007
Document number: GPR-25_Manual_v4.doc
Last revised: June 21, 2007
Charge Light: N/A
Time of Day: Daytime
Charge Light: N/A
Time of Day: Daytime
Charge Light: N/A
Time of Day: N/A
positive
wires
positive