camper trailer tech tips

Jamie's 12volt wiring page

 

 

 

 

 

 

Jamie's 12volt wiring page

 

dual battery charging system

2.51mb PDF download

 

 dual battery charging system to a camper trailer

2.18mb PDF download

 
increase amp hour battery capacity in parallel

1.02mb PDF download

 

 increase voltage capacity connect battery in series

363kb PDF download

increase voltage capacity connect batt in series
solar panels to batteries via regulator

309kb PDF download

 

 equalise to reach max charge

229kb PDF download

 
charging battery via 3 stage charger

 

2.69mb PDF download

 

 connect 6volt batteries in series to create 24 volt

226kb PDF download

 
connecting a Xantrex Link Lite meter

1.34mb PDF download

 

  wiring a junction box to 130 watt solar panel

 58kb jpg image

 
connect 6volt batteries in series to create 12 volt

279kb PDF download

 

 wiring two junction boxes to solar panel

171kb PDF download

 
connect 6volt batteries in series to create 12 volt

1.07mb PDF download

  wiring a junction box to 85watt solar panel

 160kb jpg image
   

When Charging a Battery through a 3 or more Stage Switch Mode Charger from an Inverter or Generator.


To work out what size Inverter (or Generator), will run what size Inverter you would use for this rule;

For example a Ctek 7000 which is a 7 amp Battery Charger needs a minimum of a 150 watt Pure Sine Wave Inverter (or Generator). How that was worked out is below:

The scale for 12 volt: 7 amp Charger x 15 volt x 1.2 efficiency = 126 watts

So it works out that you would require an Inverter 126 watts and above.

The scale for 24 volt: 7 amp Charger x 30 volt x 1.5 efficiency = 315 watts

So for 24 volt you will require anything from 252 watts and above.

When working with an older style Transformer based charger (heavy) you would change the efficiency to 2 instead of 1.5 or 1.2 which the more modern switch mode Chargers use.

For example: 7 amp Arlec Charger x 15 volt x 2 efficiency = 210 watts
 

For any further information please call 1300 0 SOLAR or email on info@dynamicsolarsolutions.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 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 

more useful info can be found on the Dynamic Solar Solutions website

 

 march 2008

updated november 2008

 

 

campertrailers.org

 

 

No part of this article may be reproduced without permission from the author