Solar Controller-SCM48100 User Manual
spring washer and flat washer) are screwed. The installation is finished after the screws are
tightened using relevant tool.
2.5 Wiring and Operation
2.5.1 Attentions
①. Please confirm that the backup battery is in a disconnected status before wiring. In other words,
the power supply is already disconnected.
②. Please carefully check the polarity identification of connector bar before wiring (this
equipment is common-cathode).
③. Upon connection of photovoltaic input, please confirm the anode and the cathode of
photovoltaic input. It is strictly forbidden to connect the anode and the cathode reversely.
④. Cathodes of backup battery and photovoltaic modules are forbidden to be grounded.
⑤. Before wiring, please confirm that the voltage of backup battery is in line with the voltage of
backup battery of this machine (this machine is a 48VDC system).
⑥. Before wiring, please confirm that the voltage of photovoltaic input is in line with the voltage
of photovoltaic input of this machine.
⑦. The ground terminal must be reliably grounded.
⑧. Please connect in order. Connect backup battery and electrical equipment first and PV input
later.
⑨. Please elect the wire diameter of PV input according to the following table. Make sure the
contact of wiring terminal is favorable during wiring to prevent overheating due to relatively big
current.
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