Use and Care Manual

Step 2: Battery Wiring

Step 1: connect battery positive (+) wire to the positive terminal of the unit and

load negative (-) wire to the negative terminal of the unit.

Step 2: install a DC Breaker or a DC fuse holder in a positive wire. The rating of the

DC Breaker/Fuse must be according to the charging current (40 Amp). Keep the

DC breaker off or do not install the DC fuse.

1) Multiple batteries in series connection (Refer to Fig. 5): All batteries

must be equal in voltage and amp hour capacity. The sum of their voltages

must be equal to the nominal DC Voltage of the unit.

Fig. 5

2) Multiple batteries in parallel connection (Refer to Fig. 6): Each battery's

voltage must be equal to the Nominal DC Voltage of the unit.

Fig. 6

Step 3: Solar Module Wiring

WARNING: Risk of electric shock! Exercise caution when handing solar wiring.

The solar array high voltage output can cause severe shock or injury. Cover

modules from the sun before installing solar panel wiring.

Step 1: connect positive (+) wire of solar module to the positive terminal of the

unit and negative (-) wire of solar module to the negative terminal of the unit.

1) Single solar module connection (Refer to Fig. 7): When using a single

solar module, its voltage must not exceed the maximum solar module open

circuit voltage (see below Table 1).

Fig. 7

Table 1:

Model

Solar Module Open Circuit

Voltage (max.)

Maximum Solar Module Power

GS-MPPT-320W

50 VDC

300 W

2) Multiple solar modules in series connection (Refer to Fig. 8): All

modules must be equal in amperage output. The sum of their voltages must not

exceed the maximum solar module open circuit voltage. The sum of their

solar power must not exceed the maximum capacity of the unit.

Fig. 8

3) Multiple solar modules in parallel connection (Refer to Fig. 9): Each

module's voltage must not exceed the maximum solar module open circuit

voltage. And, the sum of their solar power must not exceed the maximum

capacity of the unit.