Formulas: Amps, Watts, Temps, etc.
(DAS Follows the National Electrical Code)
12 DC – Car 110 AC – Home
To Equal Amp Draw
Take Wattage ÷ Voltage = Amp Draw
To Equal Wattage
Take Amp × Voltage = Wattage
Centimeters to Inches: cm x 0.39
Inches to Centimeter: inches x 2.54
Configuration for In-Line Fuse
(Inverter Amps) ÷ 12 = (In-Line Fuse Size)
When using a Fuse – Positive Wire
Red-Positive / Black-Negative
Boiling Point 212º
Freezing Point 32º
35º to 38º is Normal Point for Refrigerator
Anything higher than 38º bacterial can start
USB Ports = 500 Ma (milliamps) or ½ of an amp
How to explain the difference between 12-volt appliances and 120-volt appliances.
1. The 120 volt outlet in your home can put out as much as
2. 15 amps. 120 volts X 15 amps = 1800 watts.
3. The 12 volt outlet in your vehicle can also put out 15 amps of power. However, 12 volts X 15 amps = 180, now we only have 180 watts of power.
4. This is why your 12 volt appliances take longer to produce the same result as your home appliances.