Watts (w), volts (V), and amperes (A) are the basic units of measurement commonly used in electrical system calculations. In order to convert between the three, we need to recognize the specific measurements of the following units.
1. What is a watt (w)?
Watt is the unit of measurement of electrical power, is the most widely used unit of electrical physical quantities, usually used to describe a certain kind of electrical appliances to complete a certain job is to consume the amount of energy. The more energy it takes to do the job, the greater the wattage, and conversely, the less energy it takes to do the job, the smaller the wattage.
2. What is a volt (V)?
The volt is a unit of potential energy, often used to describe the “force” of an electric current passing through a circuit. From a microscopic point of view, it is a measure of a unit of electrons in the electric field due to different TV produced by the energy difference between the number of units, the size of its value is equal to a unit of positive charge due to the action of the electric field force from one end of the circuit to move to the other end of the amount of work to be done.
The greater the value of the volt, the greater the force of the current in the circuit, and conversely, the smaller the value of the volt, the less the force of the current in the circuit.
3. What is an Ampere (A)?
An ampere is a unit used to measure the magnitude of an electric current. From a microscopic point of view, it indicates how much charge passes through a certain section of a circuit in an instant, i.e., the magnitude of the speed of the current through a certain section.
4. Conversion between watts, volts and amperes
After learning the basics above, you can next realize the conversion between watts, volts, and amperes by calculating the following.
4.1 Calculator for Watts and Amps
The first thing we need to know is that an ampere (A) is a unit of measurement for current, while a watt (w) is a unit of measurement for power. To realize the conversion of amperes to watts calculation, the actual physical quantity from the current into watts, because these two belong to different physical units of measurement, so in the formula need to introduce volts (V) act as an intermediate physical quantity to help calculate:
I (A) = P (w) / V (v)
In order to better help you understand the above formula, you can give examples of practical applications of the formula. For example: when the household voltage in your area is 110v, the air conditioner installed in your house is 1100w, then its operating current is: 1100w/110v = 10A.
4.2 Calculator for Watts and Volts
The conversion from watts to volts is more commonly used in the safety of electrical systems because of the close relationship between voltage and safety, which can lead to electrical fires if the electrical appliances in a circuit are overloaded or if the inverter installed in a solar system is overloaded. In order to better evaluate the energy carried by a system, in many cases we need to use the watt to volt conversion equation:
P (w) = V (v) x I (A)
The V, P, and I in the formula all have the same meaning as within the Ampere equation, representing potential energy (voltage), power, and current, respectively.
In order to better understand the above conversion formula, you can take the solar energy system as an example: when you install 20 pieces of 110w solar panels, the total power of your solar energy system that is 2200w, in order not to exceed the voltage load of the largest household appliances, electrical appliances, the maximum current that is 20A. i.e.: 2200w = 110v × 20A.
4.3 Calculator for Amps and Volts
The conversion from volts to amperes is likewise started by introducing watts as an intermediate quantity, and the conversion between voltage, current, and power is realized according to the formula, thus ultimately realizing the conversion between the two different units of measurement, which is as follows:
V (v) = P (w) / I (A)
5. Practical application of the conversion between watts, volts and amperes
Based on the above three formulas and the three inverse formulas derived from them, we can freely convert between watts, volts and amperes. In practical applications, these formulas are utilized in many situations, and the following are some examples of classical situations.
5.1 High voltage transmission
Under normal circumstances, domestic power supply lines, the potential energy is usually 110v, but currently used in the city transmission lines are through the power plant’s transformer will be pressurized voltage and then output, the transmission voltage can reach such as 240kv or higher, the specific reason is that in the process of transmission of electricity, the transmission voltage is greater, we can further explain through the above formula:
In the case of the same transmission power, according to:
P (w) = V (v) × I (A)
It can be seen that the higher the transmission voltage, the smaller the current in the circuit, and the losses in the circuit are mainly generated by the circuit current. Reducing the circuit current can reduce the heat loss generated by the high delivery current, while the high voltage can also reduce the cost of cables and other materials generated by long-distance transmission of electricity.
5.2 Calculation of the size of home solar panels
Currently on the market solar panels are sold according to the power generated by a single block, according to:
V (v) = P (w) / I (A)
We can in the case of a constant household supply voltage (generally 110v), through the solar system can supply the size of the operating current to determine whether the size of the solar system is suitable for your home use.
