Say we have a 120 volts single-phase outlet supplying 1000 watts with a pf of 0.8, how many amps is in that outlet? Going by the formulas above, watts to amps conversion for a one-phase system:Īmps = rp ÷ (volts x pf x 3) Watts to Amps Conversion Examples AC Voltage Examples Three-phase system (line to neutral voltage): Three-phase system (line to line voltage): ![]() It is a measure of efficiency – how many watts remains in the circuit following losses, and it is typically less than one. ![]() Power factor (pf) is simply the ratio of the real power (rp) to the apparent power (ap) in a circuit. But if you want more accurate watts to amps AC conversion, you must use power factor. You can also use it for rough estimates involving alternating current (AC). The watts to amps formula above applies to direct current (DC) on any watts to amps calculator. So, to calculate amps, all we have to do is divide watts by volts: To calculate watts, we multiply electric current (a) with voltage (v). How to Convert Watts to Amps Watts to Amps Formula ![]() Then you can calculate the total amperage and verify that you won’t overload the outlet. So, with that, you can convert watts to amps. The amperage rating of your home appliances may not be stated clearly. The total load of (10 + 9 amps) 19 amps is way beyond the 15 amps threshold of the outlet. Knowing the total amperage of all the loads you intend to connect to an outlet can keep you from overloading the outlet.įor instance, if you intend to connect a 10 amps washing machine and a 9 amps vacuum cleaner to a 15-amp outlet, you will overload it. To Avoid Overloading an Outletĭepending on their current rating, outlets can support different levels of electrical loads. A watts-to-amps conversion also helps avoid potential damage to your battery. So, by converting watts to amps, you can ensure faster charging rate. Then again, excessive electric current could destroy the battery. Generally, with lower amperage, charging is slower. While it is vital to match the output voltage of your solar panel to your charge controller and battery, it is also important to match amperage.Īmperage could affect the charging rate of your battery when it falls below what is expected. Using wires whose ampacity falls below the input current might cause a fire. This knowledge becomes useful when trying to ensure your wiring can withstand the incoming electric current.īy comparing the input electric current of your solar panel (or any other energy source) with the maximum ampacity of your wires, you can tell if the wires would work or if you’d have to replace them. Why Convert Watts to Amps? To Know If Your Wiring Is Good Enoughĭoing a watts-amps conversion helps give an idea of the “electron traffic” to expect in the circuit. In other words, watts is a measure of how fast electrical appliances consume or generate electrical energy. When it comes to electricity, it represents the amount of electrical energy consumed or generated by electrical devices per unit time. Essentially, amps represents the amount of electrons moving through a circuit per second. ![]() It measures electrical current, which is the rate of flow of electrical charge/electrons through a circuit per unit time. Conversion formula: A = W / V What Is Amps?Īmps is short for amperes – the S.I unit of electrical current.
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