![]() ![]() The power output of the solar panels is measured in watts. One watt is equivalent to one joule per second, where a joule indicates a measure of power. The unit of power helps us determine how much energy is needed to perform work or generate heat. Wattage, in simple words, is the rate of energy used by a device. Understanding volts helps you find a compatible solar system that will charge all appliances efficiently. In the solar power system, the solar panels generate electrical energy that can be measured in volts. Calculating the watts of an appliance will help you figure out how much power will be drawn through any circuit by plugging it into a charging device. If you know the voltage of a device, you can quickly determine the amount of current it draws. One volt is equal to 0.001 kilowatts (kW) or 1000 watts (W) per hour. It is the speed of electrons when they pass through a specific location in a circuit. What Is Volt?Ī volt is a measure of voltage and represents the potential difference between two points of a conducting wire. Below we have explained volts and watts and why these electrical ratings are essential in solar power. It also helps you select a power generator that meets your energy needs. On the other hand, watt measures the amount of power consumed by any electrical appliance. ![]() One volt is the amount of pressure/force required to flow one ampere current against one ohm of resistance. Volt is the unit of measure of the electric force responsible for the flow of an electric circuit. Once you know the wattage of all the home electrical appliances, you can combine them to find the right size of inverter. Volts to watts conversion is necessary as it helps you understand how much power an electrical device or appliance consumes. Table 2 lists each 3-phase constant for the respective 3-phase voltage obtained from the above calculation.Whether you're a homesteader, an off-grid adventurer, or just want a reliable backup power source, this ultimate guide will help you make sense of the numbers and choose the right size solar generator. Now, if you look at the “1,000 ÷ 1.732V” portion of this equation, you can see that by inserting the respective 3-phase voltage for “V” and multiplying it by 1.732, you can then divide that resulting quantity into “1,000” to get a specific number (or constant) you can use to multiply “kW” to get the current draw of that 3-phase load at the respective 3-phase voltage. If you have a piece of equipment that draws 80A, then you can calculate the relative size of the required power source, which is 10kW (80 ÷ 8.33).īy using this same procedure but inserting the respective single-phase voltage, you get the following single-phase constants, as shown in Table 1.įor 3-phase systems, we use the following equation:Īgain, assuming unity PF and solving this equation for “I,” you get: So, if you have a 10kW load, you can calculate the current draw to be 83.3A (10 × 8.33). Now, if we look at the “1,000 ÷ V” portion of this equation, you can see that by inserting the respective single-phase voltage for “V” and dividing it into the “1,000,” you get a specific number (or constant) you can use to multiply “kW” to get the current draw of that load at the respective voltage.įor example, the constant for the 120V calculation is 8.33 (1,000 ÷ 120). Single-Phase Calculationsīasic electrical theory tells us that for a single-phase system,įor the sake of simplicity, let's assume the power factor (PF) is unity. You can use constants that apply to specific single- and 3-phase voltages to calculate current (I) and kilowatts (kW). No matter what the circumference and diameter of the respective circle, their ratio is always pi. You may ask, “What exactly is a constant?” An example of a constant with which you're very much familiar is pi (π), which is derived by dividing a circle's circumference by its diameter. We'll also show you how you can do these calculations “in your head,” with very reasonable accuracy, through the use of constants. This month, we'll discuss the most fundamental of calculations - those for current (I) and kilowatts (kW). ![]() ![]() Welcome to the first in a series of articles focusing on electrical calculation basics. ![]()
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