FORMULA to convert AC Watts to DC Amps: AC Watts divided by 12 x 1.1 = DC Amps
This is the size vehicle alternator you would need to keep up with a specific load; for example, to keep up with a continuous draw of 1000 watts, you would need a 91 amp alternator.
To calculate the total
Multiply the power by the operating time. To determine how many
Example: 150 Watts x 1 Hour = 150 Watt Hours
150 Watt Hours ÷ 10 = 15 12 Volt Amp Hours
Estimated Watts Used by Common Appliances and Tools
Appliance | Approx. Watts |
12" 3 speed fan | 230 |
VCR | |
CD or DVD player | 35 |
SONY PS3 | 360 |
Xbox Console | 100 |
LCD television | 50 » 150 |
Laptop computer | 150 |
