Wattsun AZ-225 Installation Manual page 27

7.3) POWER CONTROLLER FROM A CONSTANT POWER SOURCE:
(24 OR 48 VOLT DC BATTERY BANK OR GRID-TIED AC TO DC SWITCHING POWER SUPPLY)
Powering the tracker controller from a battery bank or Grid-Tied Switching Power Supply is the
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RECOMMENDED WAY to provide power to your Wattsun Tracker Controller.
The controller power-input leads can be connected directly to the main 24-volt battery bank.
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The tracker returns to the East at sunset and has 270 degrees of azimuth tracking available. The dip-
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switch, sensor override features built into the controller are always available when you have battery
power.
If the installation is for a 48-volt system, then you should use a Wattsun Voltage 48 to 24 VDC
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Converter to reduce the voltage to the tracker controller and motors.
If the installation is for a "Battery-Less" Grid-Tie System, then you should use a Wattsun Switching
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Power Supply (WPS5RSF-24 or equivalent) to convert AC voltage to 24 VDC.
The positive lead running from the battery bank, to the power input of the controller, should be fused
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with a 5 amp, current limiting, DC-rated fuse or equivalent DC breaker.
Failure to fuse the input power wire at the battery bank may create a potential fire hazard.
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WARNING! Do not power the controller directly from a 48 VDC battery bank. The "working voltage"
of a 48 VDC bank exceeds the controller's 50 VDC maximum input rating. A 48 VDC bank can easily
reach 59 VDC during an equalize cycle.
SIMPLIFIED WIRING DIAGRAM FOR BATTERY BANK TO CONTROLLER CIRCUIT
27