For help with these calculations, search for “energy usage calculator” on the Internet. You can also calculate how much money you spend on home energy use. You can compare the electric bills you received before you installed your Enphase Microinverter system to your current bills and calculate your energy savings, and in turn your monetary savings. Knowing about watts and watt-hours can give you a greater appreciation of the energy savings on your utility bills. If left on for two hours, then the 60 W light bulb will have used 120Wh of energy. Similarly, if a 60 W light bulb is on for one hour, then that light bulb will have used 60 Wh of energy. For example, if you drive at a constant rate of 60 miles per hour for one hour, then you will have traveled 60 miles. Speed is a rate of how fast you drive at an instant in time distance is the length, or amount that you drive over a period of time. Other common units of power include kilowatts (kW), British thermal units (BTU). In a nutshell, watt-hours measure amounts of energy for a specific period of time, and watts measure rates of power at a moment in time.Ī common analogy for watts and watt-hours is speed and distance. One of the most common units of electrical power for appliances is the watt (W). In some cases, MyEnlighten will display energy as megawatt-hours (MWh), which is one million watt-hours. A kilowatt-hour (kWh) is 1,000 Wh, so 400 kWh is 400,000 Wh. Here’s the Formula for Calculating Watts Into Kilowatt-Hours: kWh (watts × hrs) ÷ 1,000 For example, to find the kWh of 1,200 watts for 3 hours: kWh (1,200 × 3) ÷ 1,000 kWh 3,600 ÷ 1,000 kWh 3. For example, an Enphase microinverter system might generate 400 kWh (amount) in the month of September (period of time). MyEnlighten displays the amount of energy generated by your microinverter system in watt-hours. Power companies typically charge you for electrical energy by the kilowatt-hour (kWh), which is equal to 1,000 watt-hours. 072 Advertisements Currently 4. 15 per kilowatt-hour, the calculation is: 40 watts / 1,000 × 12 hours ×. Household appliances and other electrical devices perform “work” and that requires energy in the form of electricity. Thus, we use the following formula: Wattage in Watts / 1,000 × Hours Used × Electricity Price per kWh Cost of Electricity So, for example, if we have a 40 W lightbulb left on for 12 hours a day and electricity costs. So what is a watt-hour?Ī watt-hour (Wh) is a unit of energy it’s a way to measure the amount of work performed or generated. MyEnlighten displays your system’s latest and daily peak power generation in kW, which is equal to is 1,000 W. Likewise, the rate at which your solar energy system “flows” power into your home is measured in watts. Does an electrical device need a big flow or a small flow to work? For example, a 100 W light bulb uses energy at a higher rate than a 60 W bulb this means that the 100 W light bulb needs a bigger “flow” to work. Think of watts as a measure of electrical flow. Formula: watts (kilowatt hours hours) × 1,000 Abbreviated: W (kWh hrs) × 1,000 Example Let's look at an example many homeowners face when considering adding solar panels to their home. So what is a watt?Ī watt (W) is a unit of power, and power is the rate at which energy is produced or consumed. To calculate watts from kilowatt hours, divide kilowatt hours by the number of hours and then multiply by 1,000. Calculation of kWh to Watts P (W) 1000 x E (kWh) /t (hr. While watts and watt-hours are related terms, they are not the same thing. There is a formula which the calculator uses in converting Kilowatts-hours (kW) to watts (W). One kilowatt-hour (1 kWh) is equivalent to a power of 1 kW being used for 1 hour, or 05 kW for 2 hours, 2 kW for 05 hour, etc. You can also compare your home energy use to the energy generated with your Enphase microinverter system. Volume to weight, weight to volume and cost conversions for Milkweed oil with temperature in the range of 23.9☌ (75.Knowing the difference between a watt (W) and a watt-hour (Wh) helps you understand the impact of your home energy use on your electric bill. Calculate how much of this gravel is required to attain a specific depth in a cylindrical, quarter cylindrical or in a rectangular shaped aquarium or pond Ĭyclohexatriene weighs 878.65 kg/m³ (54.85233 lb/ft³) List of these foods starting with the highest contents of Choline, total and the lowest contents of Choline, total, and Daily Adequate Intakes (AIs) for Choline Gravels, Substances and OilsĬaribSea, Freshwater, Instant Aquarium, Kon Tiki weighs 1 601.85 kg/m³ (100.00023 lb/ft³) with specific gravity of 1.60185 relative to pure water. GREEN BUT-R-CREME ICING, UPC: 029519220150 contain(s) 486 calories per 100 grams (≈3.53 ounces) ġ2701 foods that contain Choline, total.
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