MPPT PRO-X 10A | 20A | 30A | 40A
— 10 —
Figure 2.2 Schematic of wiring diagram
Step 2:
Connect the system in the order of
❶
battery
❷
load
❸
PV array by Figure 2.2
”Schematic Wiring Diagram” and disconnect the system in the reverse order
❸❷❶
.
CAUTION
While wiring the controller, do not connect the circuit breaker or fast-
acting fuse and ensure that the electrode polarity is correctly connected.
A fast-acting fuse whose current is 1.25 to 2 times the rated current of
the controller must be installed on the battery side with a distance from
the battery not greater than 150 mm.
Suppose the controller is to be used in an area with frequent lightning
strikes or an unattended area. In that case, it must install an external
surge arrester.
Suppose an inverter is to be connected to the system. In that case, you
must connect the inverter directly to the battery, not to the load side of
the controller.
Step 3:
Grounding
PRO-X series are common-negative controllers; all the negative terminals can be grounded
simultaneously, or anyone is grounded. However, according to the practical application, the negative
terminals of the PV array, battery, and load can also be ungrounded. Still, the grounding terminal on
the shell must be grounded. It effectively shields the electromagnetic interference from the outside
and prevents some electric shock to the human body.
CAUTION
A common-negative controller for a common-negative system, such as the
motorhome, is recommended.
The controller may be damaged if a common-positive controller is used and the
positive electrode is grounded in the common-negative system.
