This piece of information indicates the maximum power provided by a solar panel under the sunniest conditions possible (in other words, irradiance of 1 kW/m² or 1,000 watts/m² at a temperature of 25☌).įor information, in Belgium, 1 kWp requires an average of 6m² of solar panels and provides around 850 kWh of electricity per year.īy comparison, a three-person Belgian household consumes around 3,500 kWh of electricity per year. > Read also: 5 practical tips for estimating your electricity consumptionĪre you still wondering what a kilowatt-hour is and in what way a watt-hour is a unit of energy? Our energy advisers are ready to answer all your questions by telephone on 0800 37 456 or by email ( you own photovoltaic panels or if you are researching them, you will have heard of another unit of measurement: the kilowatt peak (kWp). In a nutshell, you simply multiply the (kilo)watts by the number of hours of use to obtain the (kilo)watt-hours. and 40 kWh if it remains lit for 1,000 hours.960 Wh or 0.96 kWh (kilowatt-hours) if it remains lit for 24 hours,.40 Wh (watt-hours) if it remains lit for one hour,.By extension, it is also correct to say that one kilowatt-hour represents the energy consumption of a 100W appliance operating for 10 hours or a 10W appliance operating for 100 hours.
This means that one kilowatt-hour corresponds to the energy consumed by an electrical appliance with a power output of 1,000 watts (1 kilowatt) for one hour. “Kilo” is the prefix representing 1,000 according to the International System of Units (SI), while “hour” means “for one hour”. To understand the meaning of the word “kilowatt-hour”, we need to break it down. How do I convert from watts (W) to kilowatt-hours (kWh) or to watt-hours (Wh)? It is also based on this measurement that your supplier produces your electricity bill. So it is the kilowatt-hour that your electricity meter measures. This is a unit indicating the amount of energy consumed by an electrical appliance, and it is equivalent to 3.6 megajoules (MJ). This gives us the notion of kilowatt-hour (kWh). Converting units of power and order of magnitudeįor an appliance to work, it needs an energy supply, in this instance, electricity.
Ideally, of course, you should buy a bulb that meets your needs but one that also requires a small amount of energy to provide the desired service. So, in order to make savings on your electricity bill, it is in your interest to choose your household appliances carefully. However, it will consume five times more than a 5W bulb. For example, a 25W bulb will consume four times less electricity than a 100W bulb. Written on the glass or the foot, it immediately gives the consumer an idea of whether the bulb is economical or not. Knowing the wattage of an appliance is particularly useful for comparing light bulbs. The importance of knowing the power output of an appliance As this is an important piece of information, most electrical appliances sold display the amount of electrical power they have expressed in watts. Specifically, it is the power of a domestic appliance capable of providing one joule* (J) of energy every second (s). What is a watt (W)?Ī watt (W) is a unit measuring electrical power. I subscribe now Receive a selection of our best tips every month Differences between a watt and a kilowatt 1. Your appliances are characterized by two pieces of information: their power and their consumption. The total amount of your bill depends on the price per kilowatt-hour indicated in your energy contract and also on your electrical appliances.
KWH TO WATTS HOW TO
Knowing how to differentiate between a watt and a kilowatt-hour will help you understand your electricity bill more clearly. How do you calculate energy consumption in kWh and in euro?
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