![]() To convert amp hours to watt hours, you just multiply amp hours by volts. How to Convert Amp Hours to Watt Hours (Ah to Wh) This means our battery's max charge rate is around 83.33 amps, and we can design our solar power system so we don't exceed that limit. ![]() This is important to know because many LiFePO4 batteries have a maximum recommended charge rate of 50% of battery capacity in amp hours. The LiFePO4 battery in the example above had a 166.67Ah capacity. Why convert watt hours to amp hours? One reason is because it can help you figure out the max charge rate of your battery, so you can design a solar power system that doesn't go over that limit. ![]() After all, things like wire gauge, fuse size, and max charge and discharge rates depend on amperage, not wattage. This is helpful for making an apples to apples comparison of the energy these batteries can deliver.īut, it can be helpful to convert watt hours to amp hours when designing a solar electrical system. Some brands have started reporting their batteries' capacities in watt hours - particularly for solar generators (aka portable power stations). For instance, a 12V LiFePO4 battery actually has a voltage of 13.6V when fully charged. Note: Most people use a battery's nominal voltage when calculating amp hours or watt hours, but it's worth reminding you that a battery's actual voltage is slightly different and varies based on its remaining capacity. In this example, your battery has a 166.67Ah capacity. To do so, you'd divide watt hours by volts: 2000Wh ÷ 12V = 166.67Ah You know it's a 12 volt battery, and you want to calculate its amp hours. Let's say you have a 2000Wh LiFePO4 battery. To convert watt hours to amp hours, simply divide watt hours by volts. How to Convert Watt Hours to Amp Hours (Wh to Ah) Watt Hours to Amp Hours at 48V Watt hours (Wh) Watt Hours to Amp Hours at 36V Watt hours (Wh) Watt Hours to Amp Hours at 24V Watt hours (Wh) Watt Hours to Amp Hours at 12V Watt hours (Wh) Here are conversion charts converting watt hours to amp hours at common DC voltages. The appliance power ratings suggested are indicative only.Or would you rather convert amp hours to watt hours? Watt Hours to Amp Hours Conversion Charts Here’s our guide to the current ratings of commonly-used domestic appliances. Alternating current (AC) is used to supply things like houses and buildings and mains connected appliances. However, in alternating current (AC) the electric current changes direction at 50 times per second (50 Hz or hertz) in the UK supply.Īn example of direct current would be a battery powered torch. For direct current (DC) the electric current flows only in one direction. The labels ‘AC’ and ‘DC’ are used to describe the types of current flow in a circuit. In terms of the hosepipe example, this would refer to the amount of water being released. The higher the wattage is, the more power and output from the appliance. WattsĪmps multiplied by Volts equals Watts, which is the measurement used to determine the amount of energy. In keeping with the earlier example, you could think of volts as the water pressure in the hosepipe, which makes the water flow. Volts are the measurement used to determine how much force is needed to cause the electric current to flow. The more water flowing through the hosepipe, the stronger the current is. You should think of electric current as the flow of water through a hosepipe. Watts / Volts = AmpsĪmps measure the flow of electricity as an electric current. ![]() Watts to Amps FormulaĪlternatively to using the calculator, here are some basic equations which allow you to calculate the missing information on your own. Find out how to convert Amps to Watts here or how to calculate Ohm's Law here.
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