Go Power! GP-PWM-25 User Manual
Owner’s Manual | GP-PWM-25 Regulator
Go Power! Manual
GP-PWM-25 Regulator
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© 2010 Carmanah Technologies Corporation
Last revised March 2010
Owner’s Manual | GP-PWM-25 Regulator
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© 2010 Carmanah Technologies Corporation
Last revised March 2010
Owner’s Manual | GP-PWM-25 Regulator
CONTENTS
1.0 Installation Overview 5
1.1 Introduction 5
1.2 Specifications 6
2.0 Warnings 7
3.0 Tools and Materials Needed 8
4.0 Choosing a Location 8
5.0 Installation Instructions 9
6.0 Operating Instructions 11
7.0 Before You Read Troubleshooting 14
8.0 Troubleshooting Problems 15
8.1 Problems with the Display 15
8.2 Problems with Voltage 15
8.3 Problems with Current 16
9.0 Limited Warranty 17
9.1 General Warranty Issues 18
9.2 Repair and Return Information 19
10.0 Glossary 20
11.0 Installation Template 21
12.0 Wiring Diagram 22
© 2010 Carmanah Technologies Corporation
Last revised: March 2010
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Owner’s Manual | GP-PWM-25 Regulator
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© 2010 Carmanah Technologies Corporation
Last revised March 2010
Owner’s Manual | GP-PWM-25 Regulator
1.0 Installation Overview
1.1 Introduction
A Charge Regulator is an essential component of your photovoltaic (PV) system. The
Regulator maintains the life of the battery by protecting it from overcharging. When your
battery has reached a 100% state of charge, the Regulator prevents overcharging by
limiting the current flowing into the batteries from your solar array.
The GP-PWM-25 is an automatic selecting 12 or 24 volt flush mounted photovoltaic (PV)
charge controller rated for a continuous solar current input of 25 amps. The GP-PWM-25
uses pulse width modulation technology and a unique four stage charging system and
optional equalize setting to charge and protect your battery bank. The GP-PWM-25
features an LCD digital display that shows solar array charge current, system battery
voltage and battery capacity.
© 2010 Carmanah Technologies Corporation
Last revised: March 2010
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Owner’s Manual | GP-PWM-25 Regulator
1.2 Specifications
Description Value
Nominal System Voltage 12/24V, automatic selection
Max. Solar Array Current 25 Amps
Battery Voltage Range 6V – 31V
Max. Solar Voltage 56V
Operating Consumption
Display Consumption
Absorption Voltage 14.1/14.4V 28.2/28.8V
(25°C / 77°F), 0.5-2h / Day
Float Voltage 13.7/27.4V (25°C / 77°F)
Equalization Voltage 14.8/29.6V (25°C / 77°F),
2h / 28 Day or V < 12.1/24.2
Temperature
Compensation
Operating Temperature
Display Operating
Temperature
Humidity 99% N.C.
-40 to 85°C / -40 to 185°F
-20 to 55°C / -4 to 131°F
6mA
10mA
-4mV/cell*K
Dimensions (H x W x D):
107 x 190 x 35 mm
4.25 x 7.5 x 1.38 in
Weight: 172 grams
6 oz
Maximum Wire Gauge: #6 AWG
Warranty: 5 years
PWM Charging.
3 Battery Charging profiles.
4 Stage Charging.
Monthly Equalize option.
Displays Charging Current,
Battery Voltage and Battery
State of Charge.
Reverse Polarity protected.
Temperature Compensated.
RoHS Compliant,
environmentally safe
Accepts over 400 Watts of
solar at 12 volts.
Protection Battery Reverse Polarity,
Solar Array Reverse Polarity
(12V input only), Over
Temperature, PV Short Circuit,
Over Current
The total rated Maximum Power Current (Imp) of the PV
input should not exceed 25 Amps.
The GP-PWM-25 will limit PV current above 25 Amps.
Although the GP-PWM-25 will accept PV current greater
than 25 Amps for a short duration, damage may occur if the
GP-PWM-25 operates continuously with greater than 25
Amps of PV input.
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© 2010 Carmanah Technologies Corporation
Last revised March 2010
Owner’s Manual | GP-PWM-25 Regulator
2.0 Warnings
Disconnect all power
sources
Battery and wiring
safety
Wiring connections
Work safely
Observe correct
polarity
Do not exceed the
GP-PWM-25 Amp
current and max
voltage ratings
Electricity can be very dangerous.
Installation should be performed
only by a licensed electrician or
qualified personnel.
Observe all safety precautions of
the battery manufacturer when
handling or working around
batteries. When charging, batteries
produce hydrogen gas, which is
highly explosive.
Ensure all connections are tight
and secure. Loose connections
may generate sparks and heat. Be
sure to check connections one
week after installation to ensure
they are still tight.
Wear protective eyewear and
appropriate clothing during
installation. Use extreme caution
when working with electricity and
when handling and working around
batteries.
Reverse polarity of the battery
terminals will cause the regulator
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
regulator.
The current rating of the solar
system is the sum of the Maximum
Power Current (Imp) of the solar
PV strings in parallel. The resulting
system Imp current is not to
exceed 25 A. The voltage of the
array is the rated open circuit
voltage (Voc) of the PV array and
is not to exceed 56 V. If your solar
system exceeds these ratings,
contact your dealer for a suitable
regulator alternative.
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© 2010 Carmanah Technologies Corporation
Last revised March 2010
Owner’s Manual | GP-PWM-25 Regulator
3.0 Tools and Materials Needed
Drill with 3/32” and 3/8 bits UV Wire (Solar Array) to
GP-PWM-25)*
Keyhole or Jigsaw Battery Wire (GP-PWM-25
to Battery)*
Phillips Screwdriver Wire Cutters
Pencil or Marking Implement Wire Strippers
Torque wrench (optional) Electrical Tape
If the GP-PWM-25 Regulator was purchased with a Go
Power! RV Solar Power Kit then UV resistant wire is
included. For instructions regarding the Go Power! RV
Solar Power Kit installation, please refer to the Installation
Guide provided with the Kit.
4.0 Choosing a Location
The GP-PWM-25 is designed to be mounted flush against a wall, out of the way but
easily visible.
The GP-PWM-25 should be:
mounted as close to the battery as possible.
mounted on a vertical surface to optimize cooling of the unit.
indoors, protected from the weather.
In a RV, the most common regulator location is above the refrigerator. The wire from the
solar array most commonly enters the RV through the fridge vent on the roof. PV
connections should connect directly to the regulator. Positive and negative battery
connections must
negative distribution bus is allowed between the regulator and battery as long as it is
properly sized, electrically safe and an adequate wire size is maintained.
connect directly from the regulator to the batteries. Use of a positive or
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© 2010 Carmanah Technologies Corporation
Last revised March 2010
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