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63
Figure 6.4 Completed 12V off-grid system
Figure 6.4 shows the complete wiring of a typical off-grid system. It includes fuses for safety
and protection. This configuration shows only one panel and one battery connected to the
controller. In Sections 8 and 9, more panel and battery configurations (respectively) will be
described. Instructions will follow.
24V wiring
7.1 General information
In this section we will show the basic connections for a 24V battery system. Please follow them
thoroughly.
Caution!
The batteries must first be wired to the charge controller before the solar
panel is connected to the charge controller.
As we mentioned in last Section, the battery bank must first be connected to the charge controller
before any other connections are made. This will allow the controller to set the 24V charging
parameters automatically.
Before starting the connections keep in mind the following:
The charge controller should be as close as possible to the batteries. This helps keeping
line loss to a minimum level.
Remember to always use the recommended gauge size based on the total input
current. The PWM 30A LCD controller can handle gauges up to 6 AWG.
NEC maximum current for different copper wire sizes
AWG
16
14
12
10
8
6
4
2
0
Max. Current
10A
15A
20A
30A
55A
75A
95A
130A
170A
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