Go Power! GPR-25 - Manual (Page 7)

Owner’s Manual | GPR-25 Regulator
7
Carmanah Technologies Corp. Copyright © 2007
Document number: GPR-25_Manual_v4.doc
Last revised: June 21, 2007
7. Monitoring
Charging LED (red): When the battery is charging, the charging light will be lit. When the state of
charge for the battery is close to full, the light will be off for short periods of time and on for short periods
of time - the pulse-charging feature of the GPR-25. In situations where outside ambient light is shining on
the solar module, it may be possible for the charging light to be on after the sun has set.
LCD Display: The LCD display will cycle between solar array charge current and battery voltage readings,
as indicated by the green LED on the left of the display. The meter is accurate to within ± 2 points.
Note: Charge Termination: The charge termination of the regulator is accurate to less than 1/10 (0.1)
of a volt most of the time. Due to varying reasons the regulator may briefly overshoot the termination
point by a maximum of 2/10 (0.2) of a volt. The on/off charging nature of the regulator means that even
if the charge voltage is terminated slightly higher than the termination point, sealed batteries will not
sustain enough current to cause any overcharging or damage.
Battery Charge Monitor LEDs (green, yellow, red): These are a graphical representation of a
battery’s state of charge during the charging cycle. When the far right green LED is blinking, the batteries
are almost full. Yellow indicates that the batteries are below 12.0 V, and that the loads should be turned
off. Red indicates the voltage has fallen below 10 V and the battery is dead. Disregard the bar graph
reading if the battery is disconnected.
8. Normal Status Scenarios
These are all normal operating conditions. For abnormal conditions, consult the “Troubleshooting
Problems” portion of the Troubleshooting section.
Voltage Reading: 9.5 V - 11.5 V Charge Light: ON
Current Reading: 1 A – 25 A Time of Day: Daytime
Status: Battery is low. Regulator is charging the battery.
Remedy: Minimize loads on the battery. If available, charge the battery with alternate sources such as
the RV alternator or a generator.
Voltage Reading: 9.5 V - 11.5 V Charge Light: OFF
Current Reading: 0 A Time of Day: Nighttime
Status: Battery is low. Regulator is NOT charging the battery.
Remedy: Minimize loads on the battery. If available, charge the battery with alternate sources such as
the RV alternator or a generator.
Voltage Reading: 12 V – 14 V Charge Light: ON
Current Reading: 1 A – 25 A Time of Day: Daytime
Status: Battery is charging.
Remedy: None required. Battery is fine and charging.
Voltage Reading: 13 V – 14 V Charge Light: OFF
Current Reading: 0 A Time of Day: Daytime
Status: Battery is full or almost full.
Remedy: None required.
Voltage Reading: 11.5 V – 14 V Charge Light: OFF
Current Reading: 0 A Time of Day: Nighttime
Status: Battery is fine
Remedy: None required.