Grounding - opti-solar SC MPPT series User Manual

WARNING: Risk of electric shock! Exercise caution when handing solar wiring. The solar PV array can
produce open-circuit voltages in excess of 100V when in sunlight. Pay more attention to it.
WARNING: Risk of explosion! Once the battery's positive and negative terminals or leads that connect
to the two terminals get short-circuited, a fire or explosion will occur. Always be careful in operation.
CAUTION: 1.If no temperature sensor is connected to the controller, the battery temperature value
will stay at 25 °C.
2.If an inverter is deployed in the system, directly connect the inverter to the battery, and do not
connect it to the controller's load terminals.
1st step: Connect the battery
Connect the battery connection cable with the correct polarity to the middle pair of terminals on the solar charge
controller (with the battery symbol). If the system is 12V, please make sure that the battery voltage is within 10V~15V,
else if the system is 24V, the battery voltage should between 20V~30V, else if the system is A8V, the battery voltage
should between 40V~60V. If the polarity is correct, the LCD on the controller will begin to show.
2nd step: Connect the solar module
Ensure that the solar module is protected from incident light. Ensure that the solar module does not exceed the
maximum permissible input current. Connect the solar module connection cable to the correct polarity of the left pair of
terminals on the solar charge controller (with the solar module symbol).
3rd step: Connect loads
Connect the load cable to the correct polarity of the right pair of terminals on the solar charge controller (with the
lamp symbol). To avoid any voltage on the wires, please connect the wire to the load before connect to the controller.
4th step: Final work
Tighten all cables connected to the controller and remove all the debris around the controller (leaving a space of
approx. 15 cm)

5.5 Grounding

Be aware that the negative terminals of controller are connected together and therefore have the same electrical
potential. If any grounding is required, always do this on the negative wires. 6.1 LCD Display
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