Load Calculations
self check for load calculation
If you are not sure how many amps your device will be drawing (at 120 volts AC), here is a nice chart for you (the number is rounded to three decimals)
| Power | Current |
|---|---|
|
50 watts |
0.417 amps |
|
100 watts |
0.833 amps |
|
150 watts |
1.25 amps |
|
200 watts |
1.667 amps |
|
250 watts |
2.083 amps |
|
300 watts |
2.5 amps |
|
350 watts |
2.917 amps |
|
400 watts |
3.333 amps |
|
450 watts |
3.75 amps |
|
500 watts |
4.167 amps |
|
600 watts |
5 amps |
|
700 watts |
5.833 amps |
|
800 watts |
6.667 amps |
|
900 watts |
7.5 amps |
|
1000 watts |
8.333 amps |
|
1100 watts |
9.167 amps |
|
1200 watts |
10 amps |
|
1300 watts |
10.833 amps |
|
1400 watts |
11.667 amps |
|
1500 watts |
12.5 amps |
|
1600 watts |
13.333 amps |
|
1700 watts |
14.167 amps |
|
1800 watts |
15 amps |
|
1900 watts |
15.833 amps |
|
2000 watts |
16.667 amps |
|
2100 watts |
17.5 amps |
|
2200 watts |
18.333 amps |
|
2300 watts |
19.167 amps |
|
2400 watts |
20 amps |
|
2500 watts |
20.833 amps |
If your appliances take more than 30 amps combined, the circuit breaker will be tripped. Here is approximate amp usage per device (your CONVERTER will be listed separately since it runs continuously and its usage depends on DC load, like battery charging, lights, etc.)
| Load | Usage |
|---|---|
|
Converter |
5-13 amps |
Appliances on RV commonly use this amount of power (you can convert wattage to get the exact number of amps):
120 VOLT System Amperage Calculations (WATCH HOW FAST YOU USE UP 80 AMPS OF A 100 AMP PANEL. MAX LOAD IS 80% OF BREAKER MAX )
| Units | Load | Usage |
|---|---|---|
|
1 |
Roof air conditioner |
10-15 amps |
|
1 |
Washer/dryer |
13-15 amps |
|
1 |
Residential refrigerator |
12-15 amps |
|
1 |
Electric kettle |
12-13 amps |
|
1 |
Electric frying pan |
10-11 amps |
|
1 |
Electric water heater |
10-12 amps |
|
1 |
Toaster (2 slices) |
7-13 amps |
|
1 |
Microwave |
8-11 amps |
|
1 |
Battery Charger |
8-9 amps |
|
1 |
Hair Dryer |
8-9 amps |
|
1 |
Space heater |
10-15 amps |
|
1 |
Electric coffee maker |
7-12 amps |
|
1 |
Iron |
7-8 amps |
|
1 |
Food Processor |
6-7 amps |
|
1 |
Window air conditioner |
6-7 amps |
|
1 |
Electric Stove |
5-6 amps |
|
1 |
Electric Drill |
4-5 amps |
|
1 |
Ceiling fan |
3-5 amps |
|
1 |
TV |
3-4 amps |
|
1 |
Curling iron |
3-4 amps |
|
1 |
Hand Vacuum |
2-3 amps |
|
1 |
Computer |
2-3 amps |
|
1 |
Heating Pad |
1.5-2 amps |
|
1 |
DVD player |
1-2 amp |
|
1 |
Radio |
1-2 amp |
|
1 |
Satellite (dish & receiver) |
1-2 amps |
|
1 |
Light |
1-2 amps (YOU MAY HAVE A FEW OF THESE) |
** These guides are for informative purposes only and a professional should be consulted for more details.
