What is the Difference Between AC and DC amps? How do I know which size Power Inverter I need?

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When choosing the right size power inverter people often want to know how to find out what size to buy. Well the answer is in the amps AC or DC. Primarily most household devices give an amp rating on the device or in the owners manual. Usually this information is in AC amps. For example my monitor in my desk uses 1.6 AC amps. Let us this example to run through some conversions. To get to DC amps from AC is a two step process. First we need to find the watts. The formula for this is below.

AC amps x Vac (volts of our AC device) = Watts

1.6 amps x 120 Vac = 192 watts

To find DC amps from Watts we use the formula below.

Watts/Vdc (volts of our DC system) = DC amps

192 watts / 12 Vdc = 16 DC amps

DC amps are very important when it comes to talking about battery life. When working with deep cycle batteries, its all about DC amp hours. How many do you have and how many DC amp hours are you going to need to run your power inverter? You can use the formulas above to find the information you need.

Whether its a power inverter or a deep cycle battery, the amount of amps AC or DC are very important and crucial information to make sure you can run the essential equipment you need.

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