Morningstar SunGuard Manuale utente

SOLAR BATTERY CHARGE CONTROLLER

PERATOR

’

ANUAL

1098 Washington Crossing Road

Washington Crossing, PA 18977 USA

Website: www.morningstarcorp.com

1.0 SPECIFICATION SUMMARY

System Volts

12 V

PWM Setpoint

14.1 V

Max. Solar Volts

30 V

Accuracy

+/–60 mV

Rated Solar Input

4.5 A

Min. Operating Volts

Max. Input (5 min.)

5.5 A

Self-consumption

6mA

Max. Solar Short Circuit Rating

5.5 A

PWM Temp Compensation

–28 mV/˚C

Reverse Current Leakage

<10 uA

Ambient Temperature Range

–40 to +60 ˚C

Relative Humidity

100%

2.0 SAFETY INSTRUCTIONS

•Follow these instructions carefully during installation.

•WARNING - Be very careful when working with batteries. Lead

acid batteries can generate explosive gases, and short circuits

can draw thousands of amps from the battery. Read all instruc-

tions provided with the battery.

• Do not exceed the voltage or current ratings of the controller.

Use only with a 12 volt battery.

•Do not SHORT CIRCUIT the solar array while connected to

the controller. This will DAMAGE the controller.

• The negative system conductor should be properly grounded

for most effective lightning protection.

3.0 OPERATION AND FUNCTIONS

•100% SOLID STATE: All power switching is done with

MOSFETs. No mechanical relays are used.

• The SunGuard wires are rated for outdoor use, size 16 AWG,

with Hypalon insulation.

•BATTERY CHARGE REGULATION: SunGuard uses an

advanced series PWM charge control for constant voltage

charging. A true 0 to 100% PWM duty cycle is very fast and

stable for highly efficient charging.

• TEMPERATURE COMPENSATION: A sensor measures ambient

temperature and corrects the constant voltage setpoint by

–28 mV per ˚C with a 25˚C reference. This works best if the

SunGuard and battery are in a similar thermal environment.

• The SunGuard prevents the battery from discharging through

the solar array at night. There is no need to install a blocking

diode for this purpose.

4.0 INSTALLATION

1. SunGuard can be mounted in any position. It is best to mount

to a vertical surface and allow space for air flow through the

controller.

2. First connect the Battery

BLACK

wire (negative) to the battery.

Use either black wire since they are connected together inside

the controller.

3. Connect the

RED

Battery positive wire to the battery.

4. Connect the Solar array using the other

BLACK

wire and the

YELLOW

Solar positive wire. Be very careful not to short circuit

the solar array, or the controller will be damaged.

5. SunGuard prevents reverse current leakage at night, so a

blocking diode is not required in the system.

6. A negative earth ground at the battery is recommended for

most effective lightning protection.

7. SunGuard can be mounted outdoors. Do not expose to ambi-

ent temperatures above 60˚C. Make sure that water will drain

from inside the case.

+–

SOLAR

YELLOW

SOLAR

BLACK

BATTERY

BLACK +

BATTERY

RED

–

SOLAR CONTROLLER

12 V 12 V

Made in Singapore

RATED 4.5A 12V

SOLAR BATTERY

5.0 INSPECTION AND MAINTENANCE

At least once per year, inspect the controller to ensure best

performance.

•

Confirm that the solar array is not exceeding the SunGuard rating.

•Inspect the wire connections.

• Inspect for dirt, insects and corrosion. Clean as required.

• Check that the air flow through the SunGuard is not blocked.

• Confirm that water is not collecting inside the case.

6.0 TROUBLESHOOTING

The SunGuard can be tested with a power supply used in

place of either the solar array or the battery. Observe the

following cautions:

•Current limit the power supply to 2 amps.

• Set the power supply to 15 volts DC.

• Connect only one power supply to the controller.

FTHE BATTERY IS NOT CHARGING

If the SunGuard is regulating (in PWM), then the controller is

charging and operating correctly. If the battery voltage is low

(under 12.5V - this test will not work if the SunGuard is regu-

lating in PWM), then measure the solar voltage and battery

voltage close to the SunGuard. If the voltages are within a few

tenths of volts, the array is charging the battery. If the solar

voltage is close to 20 volts and the battery voltage is low, the

controller is not charging the battery and may be damaged.

FTHE BATTERY VOLTAGE IS TOO HIGH

First account for the temperature compensation (for exam-

ple: 0˚C = 14.8 charging volts). Next, disconnect the solar

array and measure the voltage at the SunGuard solar yellow

and black leads. If battery voltage is measured at the solar

leads, the controller may be damaged.

OTE

For more detailed testing instructions, contact the

Morningstar website.

105E-R1-2/99

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