camper trailer tech tips

Jamie's 12volt wiring page

 

 

 

 

 

Jamie's 12volt wiring page

dual battery charging system

 

 dual battery charging system to a camper

 
increase amp hour battery capacity in parallel

 

 increase voltage capacity connect in series

 
solar panels to batteries via regulator

 

 equalise to reach max charge

 

 

 6volt batteries in series to create 24 volt
connecting a Xantrex Link Lite meter

 

  Xantrex Link Lite meter wiring

 
wiring two junction boxes to solar panel

 

 wiring a junction box to 130 watt solar panel

 
6volt batteries in series to create 12 volt

 

 6volt batteries in series to create 12 volt
wiring a junction box to 85watt solar panel

 inverter fuse sizing

When working out what size fuse to use with your inverter a good way to work this out is as the example below.....

For a 3000 watt 12 volt inverter: 3000 divided by 10 = 300. So the size fuse you would require for a 12 volt 300 watt inverter is a 300 amp Mega Fuse.

For a 3000 watt Inverter 24 volt: 3000 divide by 20 = 150. The size fuse you would require for a 24 volt 3000 watt inverter is a 150 amp Mega Fuse.

The most common used fuse to use would be a Mega Fuse.

The fuse should be sized from the surge rating of the inverter e.g. Sinergex Pure Sine 3000 watt 12 volt has a surge of 6000 watts that would mean for a 6000 watt inverter 12 volt: 6000 divide by 10 = 600. So the size fuse you would require for a 12 volt 3000 watt inverter is a 600 amp Mega Fuse.
 

For further information contact JTS contact@jtsonline.com.au
 

cable length & current capacity guide
cable in mm˛

                 current in amps


C
a
b
l
e

L
e
n
g
t
h

m
e
t
r
e
s
 
12
16
20
25
32
50
63
80
105
125
155
1
1
1.5
2.5
4
6
10
16
25
35
50
70
2
2.5
2.5
4
4
6
10
16
25
35
50
70
3
4
4
6
6
10
16
16
25
35
50
70
4
4
6
6
10
10
16
25
25
35
50
70
5
6
6
10
10
16
25
25
35
50
50
70
6
6
10
10
16
16
25
25
35
50
70
70
7
10
10
16
16
16
25
35
50
70
70
Over
8
10
10
16
16
25
35
50
50
70
Over
9
10
16
16
25
25
35
50
70
Over
10
10
16
16
25
25
50
50
70
11
10
16
16
25
25
50
70
70
12
16
16
25
25
25
50
70
Over
13
16
16
25
25
35
50
70
14
16
16
25
25
35
70
70
15
16
25
25
25
35
70
Over
16
16
25
25
35
50
70
17
16
25
25
35
50
70
8 B&S=
8mm˛
18
16
25
25
35
50
70
6 B&S=
13.5mm˛
19
25
25
25
35
50
Over
4 B&S=
20mm˛
20
25
25
35
50
50
3 B&S=
25mm˛
30
35
35
50
70
Over
40
35
50
70
Over
50
70
70
Over
60
70
over
70
Over

eg. Duoetto 12 volt 10 litre water heater draws 22 amps (that's 22 amps per hour) on 12 volt and is 4 metres from the battery.
It requires a cable of at least 8mm˛ or 8 B&S.
Note: cable capacity at 12.6 volt to a maximum loss of 5%.
This chart is a guide only.

 

All diagrams have been reproduced with permission from 

 

 march 2008

updated march 2013