The popularity of electrical equipment, including solar energy systems for the home, is gradually increasing, and more and more people are learning about the relevant electrical knowledge, especially when using solar energy systems, both the design of the size of the solar energy system and the profit that can be earned from the solar energy system at a later stage need to be arrived at through accurate electrical calculations. Below is an explanation of watts and volts, including the relationship between the two calculations.
Before learning how to convert watts to volts, we need to learn some specialized electrical terms.
1. What is a watt (w), what is a kilowatt (kw), and what is the relationship between the two?
A watt is a unit of electrical power, abbreviated as w, which is mainly used to describe the amount of energy consumed to operate an electrical appliance. The same unit is also known as a kilowatt, which is a larger unit of measurement and is usually used to describe the power consumption of an electrical system in a domestic or commercial setting. Converting watts to kilowatts is simply a matter of dividing the value by 1000, i.e:
1000w = 1kw
2. What is a volt (v), what is a kilovolt (kv), and what is the relationship between the two?
Volt is a unit used to describe the magnitude of electric potential of an electrical system. Generally, the loads in a practical application are connected in parallel to ensure that the individual units start and shut down independently. Therefore, within the same electrical system, the loads generally have the same electromotive force, e.g. household appliances all have an electromotive force of approximately 110 volts.
As for kilovolts, the exact meaning is the same as that of volts, which is the unit used to express the magnitude of the electromotive force, except that kilovolts are measured in larger units. Converting volts to kilovolts is simply a matter of dividing the value by 1000, ie:
1000v = 1kv
3. What is an ampere (A)?
An ampere is a unit used to describe the amount of current in an electrical circuit. In a microscopic sense, it describes the size of the volume of electrons present in real time at a particular point in the circuit, while a volt describes how much energy is present at that particular point as the electrons pass through a closed circuit.
The reason why amperage is mentioned here is precisely because watts and volts are not units of measurement of the same thing, and cannot be converted directly by the formula, but rather the concept of amperage needs to be introduced as an intermediate value to help in the calculation.
4. Watts to Volts Calculator
After learning about watts, volts, and amperage, we can next implement a watts to volts calculator with the following formula:
V=P/I
We can see that letters not introduced in the article appear in this formula. First of all, we need to know that volts, watts, and amps all exist as a unit of measurement, and the physical quantities that correspond to each of them are: voltage (V), power (P), and current (I), respectively. This is the meaning of the above equation:
Voltage = Power / Current
With the calculation between these three physical quantities, we can realize the process of converting a value in watts to another value in volts.
The following will help you better understand the formula through specific examples of calculations: when you buy an appliance that operates with a power of 220w and a circuit current of 2A, the required operating voltage is calculated to be 110v.
5. Utilization of the Watt to Volt Calculator
After learning about the watts to volts calculator, we can use it when designing a solar system for our property. Solar panels function by collecting solar energy and converting it into electricity. Solar panels on the market today are sold by power, which is measured in watts (w). If you can utilize the formulas you have learned, you will be able to participate in the design of your own solar energy system.
6. Are there differences in the formulas for DC and AC power, and what are the main differences?
The above formulas generally only apply to DC watts to volts calculations. However, the current household current is generally AC, and the DC power emitted from solar panels also needs to be converted into AC power through an inverter before use, and for AC watts to volts calculation, we generally use the following formula:
V=P/(PF×I)
The difference between this formula and the DC calculation formula is this:
The voltage in this formula is the RMS voltage, also called the RMS voltage. Since the voltage in an AC circuit changes over time, the RMS value is the value taken from that circuit and the DC voltage that produces the same heating effect. The PF in the formula is the power factor, a value used to measure the phase difference between voltage and current in a circuit. The greater the phase difference between the voltage and current in the circuit, the lower the power factor, the less efficient the circuit, and the less stable the overall system.
It is worth noting that there is a special type of alternating current known as three-phase alternating current. It is a power system consisting of three AC circuits with the same frequency, the same potential amplitude, and a phase difference of 120° from each other, and is the most commonly used type of AC.
The formula for calculating watts to volts for this type of alternating current is divided into two types:
Calculate the RMS voltage by replacing it with the voltage across the lines (V L-L)
V L-L (V) = P (W) / ( √ 3 × PF × I (A) )
and using line-to-neutral voltage (V L-N) to calculate
V L-N (V) = P (W) / (3 × PF × I (A) )
