Marine Power Usage
The chart below shows examples of energy consumption of various equipment. The current (amps) is multiplied times the amount of hours per day is used to determine the Amp Hours per day of energy that is consumed. These values are based on a 12 V DC nominal system.
|
POWER USAGE CHART
|
|
Equipment
|
Amps
|
Hours
Used
|
Amp Hours
Per Day
|
|
Cabin Light 15w
|
1.25
|
4
|
5
|
|
Cabin Light 25w
|
2.1
|
2
|
4.2
|
|
Cabin Fan
|
0.25
|
8
|
2
|
|
Marine Stereo
|
2.5
|
2
|
5
|
|
Pressure Water
|
2.5
|
0.1
|
0.25
|
|
Electric Refrigerator
|
4.5
|
10
|
45
|
|
Microwave*
|
50
|
0.1
|
5
|
|
Coffee Maker*
|
42
|
0.04
|
1.68
|
|
Hair Dryer 750w*
|
63
|
0.04
|
2.52
|
|
Blender*
|
63
|
0.01
|
0.63
|
|
Food Processor*
|
34
|
0.02
|
0.68
|
|
Color TV (9")*
|
5
|
2
|
10
|
|
Color TV (19")*
|
8
|
2
|
16
|
|
L Black & White TV (12")*
|
1
|
2
|
2
|
|
VCR*
|
1.75
|
2
|
3.5
|
|
1/4" Drill*
|
12
|
0.1
|
1.2
|
|
750 CFM Fan*
|
1
|
1
|
1
|
|
PC*
|
5
|
1
|
5
|
|
*Runs through an inverter
|
|
|
|
If selected items in the above charts do not match to your usage, make up you own chart similar to above, calculate the amp-hrs per day for each item you use on board, then just total the items and you will know your daily amp-hour demand. That key piece of information will enable the technical staff at e RV to determine the necessary House Battery Bank size and alternate energy products (Solar PV & Wind) needed that can support your off-grid (boondocking) lifestyle.