So you calculate the kilowatt hours of both of your batteries. To take both of these into account, you need to calculate a battery's kilowatt hours. Like I said, the amount of energy stored in a battery depends on its amp hours and voltage. You may assume, then, that they hold the same amount of energy. If you look at their amp hours, you see they're identical. This is because the total energy a battery can provide depends on both its amp hours and voltage.įor example, let's say you have a 12V 100Ah battery and a 24V 100Ah battery. It's easy to deduce that a 12V 50Ah battery has half the capacity of a 12V 100Ah battery, for instance.īut, once you start to compare batteries of different voltages, only comparing their amp hours can lead to confusion. This is helpful when comparing batteries with the same voltage. It's common for battery sizes to be listed in amp hours. So, in this example, your battery has a capacity of 1.2 kilowatt hours. Knowing these, we can now calculate its kilowatt hours. It has a capacity of 100 amp hours and a voltage of 12 volts. As you can see, these are printed right on the front of the battery. To calculate battery capacity in kilowatt hours, first locate its amp hours (Ah) and voltage (V). To convert amp hours to kilowatt hours, multiply amp hours times volts, then divide by 1000.įormula: kilowatt hours = amp hours × volts ÷ 1000Ībbreviated: kWh = Ah × V ÷ 1000 Example: How to Calculate Kilowatt Hours of a Batteryįor example, let's say you own this lithium battery: How to Convert Amp Hours to Kilowatt Hours (Ah to kWh) Here is a conversion chart converting common amp hour values to kilowatt hours at 12 and 24 volts. Question: 600W are being sent at 120V.Or would you rather convert kilowatt hours to amp hours? Amp Hours to Kilowatt Hours Conversion Chart Let's go through some examples to help nail the conversion process. Advertisements Watts to amps conversion examples Power supplied to homes and businesses uses AC supply. In Europe, the UK, East Japan and most of Australia, South America, Africa andĪsia, the current changes direction 50 times per second, which is 50Hz. In Northern America and Western Japan, this usually happens 60 times per second, or 60Hz / hertz. A flashlight with a battery uses a direct current.ĪC stands for alternating current, when the current periodically changes direction. North American homes typically use 120V for their electrical supply, whilst 230V is common acrossĭC stands for direct current, when the current flows in one single direction. In the hose analogy, the volts would be the water pressure. They measure the force required to make the electrical current (amps) flow. It uses increased water volume and higher water pressure the same applies to the wattage if amps and volts are increased. A water wheel would turn faster and longer, generating more energy if Multiplying amps (water volume) by volts (water pressure) gives you the wattage (the resulting power or energy). Watts represent the amount of energy produced by the amps and volts working together. In this analogy, the quantity (volume) of water would be the amps. It can be helpful to imagine electrical current as water in a hose. What are amps?Īmps are amperes, a unit which measures electrical current. To help understand the conversion of watts to amps, let's go through what each of these units represent. Advertisements Understanding watts, amps and volts
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