|
Applications
|
Power
(P)
|
Voltage
(V)
|
Current
I=P/V
|
Hours
of
functioning
|
Capacity
Ah
|
Caravans
1X40W
Bulbs |
40W
|
12V
|
3.3A
|
4h
|
13.2Ah
|
| Portable
T.V. |
50W
|
12V
|
4.2V
|
4h
|
16.8Ah
|
If
used together: Capacity required = (13.2+16.8) X 1.25*=37.5Ah use
type RR0
The 40 Ah Battery should be selected.
|
| Lighting
2X40W Bulbs |
80W
|
12V
|
6.7A
|
6h
|
40.2Ah
|
|
Capacity
required=40.2X1.25*=50.25Ah use type RR2
|
| Portable
Television |
50W
|
12V
|
4.2A
|
4h
|
16.8Ah
|
|
Capacity
required=16.8X1.25*=21Ah use type RR0
|
| Boating
Refrigerator |
60W
|
12V
|
5A
|
8h
|
40Ah
|
| V.H.F.
Radio |
1W
|
12V
|
0.08A
|
5h
|
0.4Ah
|
G.P.S.
Navigation
System |
8W
|
12V
|
0.7
|
3h
|
2.1Ah
|
| Auto
Pilot |
24W
|
12V
|
2.0A
|
5h
|
10.0Ah
|
|
.
|
.
|
.
|
.
|
TOTAL
|
52.5Ah
|
If
used together: Capacity required = 40+0.4+2.1+10=52.5X1.25=65.63Ah
use type
RR2
|
|
*The
security factor is used for: Incomplete Charging and Protecting
against Over Discharge
|
