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8 Electrical system
118
B-MC - 12/18-2 - EHG-0016-01EN
The television (power consumption 36 W) with satellite unit (power con-
sumption 36 W) is in operation every day for 2 hours.
Convert the power data into the required capacity in accordance with the
following formulas:
Power consumption [W] : 12 V = Current [A]
Current [A] x Operating time [h] = Capacity [Ah]
36 W + 36 W = 72 W
72 W : 12 V = 6 A
6 A x 2 h = 12 Ah
The table for a whole day could look like this:
Appliance
Power
consump-
tion [W]
Current [A] Operating
time [h]
Capacity
[Ah]
Balance of energy
consumption
(example)
Submerged pump
42
3.5
0.1
0.35
Heater
12
1.5
3.0
4.50
Television
36
3.0
2.0
6.00
Satellite
unit
36
3.0
2.0
6.00
Refrigerator
2
0.2
24.0
4.00
Lighting (10 LED
lamps à 2 W)
20 1.6
3.0
4.80
Average daily requirement
25.65
Calculate the maximum effective energy with the following formula or
determine it with a special indicator unit:
Current capacity [Ah]: Deep discharge protection = Maximum effective
energy [Ah]
95 Ah : 1.4 (lead battery) = 67.9 Ah
Calculate the maximum operating time in accordance with the following
formula:
Max. effective energy [Ah] : Daily requirement [Ah] = Max. operating
time (in days)
67.9 Ah : 25.65 Ah = 2.65
The current battery capacity would be sufficient for more than two and a half
days if the daily requirement remains the same.
The independent time period can be extended with use of the solar cells.
Two solar cells of 90 W produce the following gain:
Summer: Approx. 60 Ah/day (independent operation reached)
Winter: Approx. 15.5 Ah/day (in order to prolong independent operation,
another living area battery must be installed)
Example:
Example:
Example:
Solar cells
Summary of Contents for BMC 550
Page 2: ...Instruction manual 2 B MC 12 18 2 EHG 0016 01EN...
Page 8: ...Checklist before first journey of the vehicle 8 B MC 12 18 2 EHG 0016 01EN...
Page 12: ...1 Introduction 12 B MC 12 18 2 EHG 0016 01EN...
Page 20: ...2 Safety 20 B MC 12 18 2 EHG 0016 01EN...
Page 54: ...4 During the journey 54 B MC 12 18 2 EHG 0016 01EN...
Page 140: ...8 Electrical system 140 B MC 12 18 2 EHG 0016 01EN...
Page 172: ...9 Appliances 172 B MC 12 18 2 EHG 0016 01EN...
Page 186: ...10 Sanitary fittings 186 B MC 12 18 2 EHG 0016 01EN...
Page 202: ...11 Care 202 B MC 12 18 2 EHG 0016 01EN...
Page 224: ...13 Wheels and tyres 224 B MC 12 18 2 EHG 0016 01EN...
Page 240: ...16 Technical data 240 B MC 12 18 2 EHG 0016 01EN...
Page 242: ...17 Instructions for the service partner 242 B MC 12 18 2 EHG 0016 01EN...