Example: Over the course of a 30-day month, your fan would use (1.25 kWh / day) x (30 days / month) = 37.5 kWh … One kilowatt is equal to 1,000 watts, so to figure out the kWh per day that your refrigerator uses, you simply need to divide the watt-hours per day (7,200) by 1,000 for a total of 7.2 kWh per day. The energy E in kilowatt-hours (kWh) per day is equal to the power P in watts (W) times number of usage hours per day t divided by 1000 watts per kilowatt: While both are interrelated units of measurement, the important difference between kWh and kW is that a kWh reflects the total amount of electricity used, whereas a kW reflects the rate of electricity usage. h, are a measure of electrical charge, and are often used to measure the charge of batteries. The average kWh usage per day for a residential consumer is 30 kWh per day. A EIA.gov reported the average yearly electricity use for a residential utility customer in the U.S. was 10,399 kWh (867/month) with Louisiana coming in at the highest with 14,242 kWh … Type in your own numbers in the form to convert the units! How much electricity does a fridge use? The US ranges from about 4 hours – 6 hours of sunlight per day, on average, see the below map. Instant free online tool for kilowatt to kilojoule/hour conversion or vice versa. If you have ever looked closely at an electric meter or utility bill, you may have noticed that the units of electricity consumption are given in kWh, or kilowatt-hours. Convert amps to kilowatts for AC and DC circuits with our amps to kw calculator, along with the formulas and examples on how to do the conversion. kJ = kWh * 3600. Note that rounding errors may occur, so always check the results. kWh stands for kilowatt-hour. Fridge electricity use varies greatly depending on size and efficiency. Knowing that a kilowatt is 1,000 watts and one hour includes 3,600 seconds, you then have: 1 kWh = (1,000 J/sec)(3,600 sec) = (3,600,000 J) = 3.6 megajoules = 3.6 MJ. ), what will be the energy in Kilowatt hours? The amount of electricity you use … Step 1: Multiply kW by the hours. E (kWh) = P (kW) x t (hr. Drilling down even deeper, since there are 24 hours in a day, this translates to about 1.25 kWh per hour (30/24 = 1.25). Now Im monitoring my KWh every day. If a 100 Watt bulb (power) is left on for 10 hours, it uses 1,000 Watt-hours, or 1kWh. A watt is the standard unit of power in physics, and power in turn is energy per unit time. If a solar panel generates 250 Watts from the sun for five hours each day for 30 days, multiply 250 (Watts) by 5 (hours) by 30 (days) to determine that the panel generates 37,500 Watt-hours per month. It is possible to find the amperage from kilowatts if you know the voltage of the circuit using Watt’s law. Megawatt hour is a metric system energy unit. 1628.2 kWh ~= 1628 kWh 200 Wh. 100 kW * 4 hours = 400 kWh. ), what will be the energy in Kilowatt hours? ... Convertissez barils d'équivalent pétrole en Kilowatt-heures ici. The kWh/kW(DC) really is an efficiency number indicating the kWh produced for each kW DC of your system over a given period. What is Kilowatt hours? e.g. 4.17 kw divided by 240V is 17.36 A. So the kWh divided by the hours of sun equals the kW needed. Also, explore tools to convert kilowatt or kilojoule/hour to other power units or learn more about power conversions. kilowatt-hour: kWh. 1 joule is equal to 1.0E-6 MJ, or 2.7777777777778E-7 kwh. For instance, I have 33-235 watt panels giving a 33*235 = 7.755 kW DC system. Formerly with ScienceBlogs.com and the editor of "Run Strong," he has written for Runner's World, Men's Fitness, Competitor, and a variety of other publications. Watt’s Law states that current = power ÷ voltage. Start Type in your own numbers in the form to convert the units! Ohio State University Physics: What Is Power? The calculator provides indicative conversion of gas consumption in cubic metres to kilowatt hours and megawatt hours. University of Oregon: How Much Energy is a Kilowatt Hour? Step 3: Figuring Usage Over a Month The kilowatt [kW] to kilojoule/hour [kJ/h] conversion table and conversion steps are also listed. To convert energy in kWh to power in kW, use the formula below. Status Not open for further replies. If, for example you consume 100 kwh in a day at 240VAC and assume a steady state load, that's 100 kwh divided by 24 hours, or a 4.17 kw load. Then multiply this by the time the appliance is switched on – in this case, 24 hours. Subtract the new meter reading from the previous reading to work out the volume of gas used. For Calculating the energy Usage for a Month, multiply that by 30 to calculate energy usage for the month. Calculate energy Usage for a Month. To convert from electrical charge to energy, use the formula below along with the voltage. Now you know how many kilowatt-hours (kWh) the device uses every day. Get hassle-free estimates from local home improvement professionals and find out how much your project will cost. Using the Kilowatt-hours to Kilowatts calculator is simple and will require you to enter the exact units in the appropriate text fields. Use this page to learn how to convert between megajoules and kilowatt hours. 4.17 kw divided by 240V is 17.36 A. kilowatt hour (kWh) Destination unit: megajoule (MJ) Related category: Power In physics, energy is a scalar physical quantity that describes the amount of work that can be performed by a force, an attribute of objects and systems that is subject to a conservation law. Or, 30 kWh / 5 hours of sun = 6 kW of AC output needed to cover 100% of your energy usage. Use the following formula to calculate kWh: kWh = … 80 Kilowatt-hours to Cubic Feet Of Natural Gas = 272.9713: 3 Kilowatt-hours to Cubic Feet Of Natural Gas = 10.2364: 90 Kilowatt-hours to Cubic Feet Of Natural Gas = 307.0927: 4 Kilowatt-hours to Cubic Feet Of Natural Gas = 13.6486: 100 Kilowatt-hours to Cubic Feet Of Natural Gas = 341.2142: 5 Kilowatt-hours to Cubic Feet Of Natural Gas = 17.0607 Kilowatt-hours. To obtain kilowatt-years, the amount of generated or consumed energy of the electrical installation (appliance) in kilowatt-hours must be multiplied by the time it worked per day and multiplied by the number of days of work per year. Also, explore tools to convert kilowatt-hour or ton-hour (refrigeration) to other energy units or learn more about energy conversions. Thus a more accurate way to derive kW from kWh/year means dividing by: To go from kWh/year to watts instead, just multiply this result by 1,000, since a kilowatt is 1,000 watts. 1 MWh = 1000 kWh. Metric gas meters. For some perspective, the average five-person household consumes roughly 20kWh of electricity per day. So daily usage is 0.350 kWh, then monthly usage would be 10.5 kWh..35 kWh per day X 30 days =10.5 kWh per month Drilling down even deeper, since there are 24 hours in a day, this translates to about 1.25 kWh per hour (30/24 = 1.25). kWh to kJ formula. = 550 Kilowatt … So, the power in kilowatts is equal to the energy in kilowatt-hours divided by the time-period … The electric company uses this measurement to calculate how much to bill customers, for example. Since the "hour" unit in kWh/h is canceled out, it follows that expending 10,800 kWh of energy over the course of a year requires a steady power draw of 1.25 kW… Are You Planning a Home Improvement Project? GJ or kWh The SI derived unit for energy is the joule. E (kWh) = P (kW) x t (hr. The power P in watts (W) is equal to 1000 times the energy E in kilowatt-hours (kWh), . For example, let’s convert 48 kWh of energy consumption over a 24-hour time period to kW. al. ), which means that the energy in Kilowatt-hours is calculated by multiplying the power in Kilowatts by the time in hours. Units can be set in the units field. kilowatt-hour = kilowatt × hour. For example, if your energy in kilowatts is 45 (kWh), and the time in hours is 5 hrs. 350 watt-hours per day / 1000 =0.350 kWh per day. If you operate your lighting for 4,320 hours per year (12 hours per day, 360 days per year), the 100W PAR38 would use 432 kWh per year and the 14W LED PAR38 would use just over 60 kWh per year. In reality, you need to multiply the number of hours in a day by the number of days in a year, and if you really want to get fancy and factor in leap years, the average number of days in a year is 365.25, not 365, since a leap year occurs every four years. Status Not open for further replies. a light bulb labeled “25W,” so you screw it in, and to your dismay, it’s way too dim. If the car’s battery was completely flat, it would take about 3.5 hours to fully charge — 75 divided by 22 equals 3.4. The value is for the whole day. For example, If the power in kilowatts is 50 (kW) and the time in hours is 11 (hrs. Energy consumption calculation. 0.350 kWh washing machine consume per day. Multiply by calorific value (40.0). ; Dec 2007. Battery Ah Rating: Battery Rating (Volts): Result window. If 10,800 kWh per year translates to 1.25 kW, then the conversion factor is: This is a step-by-step means of establishing what may have been clear to math nerds from the outset: To get from kWh per year to kW, you merely need to divide by the number of hours in a year. So your 0.5 kW dehumidifier uses 12 kWh per day. If for instance, the system receives maximum sunlight for a period of let’s say 4 hours, it means the panels can produce a total of 400 kWh of energy. 1 kWh = 3600 kJ. Since the "hour" unit in kWh/h is canceled out, it follows that expending 10,800 kWh of energy over the course of a year requires a steady power draw of 1.25 kW, or 1,250 watts. e.g. divided by the consumption time period t in hours (hr): P (W) = 1000 × E (kWh) / t (hr). Although the above example arrives at 8,640, this figure is inexact owing to the rounding done in the problem. Expressed in the standard unit of energy in the International System of Units (SI), the joule (symbol J), it is equal to 3600 kilojoules (3.6 MJ).. I just moved in a total electric house a few months ago and when I got my second electric bill it was ridiculous. kWh to kW calculator KW to kilowatt-hours calculation. kWh = MWh * 1000. To convert MWh to kWh, multiply the MWh value by 1000. 10,800 kWh in one year is about 900 kWh per month (10,800/12 months = 900) and about 30 kWh per day (using a month of 30 days, 900/30 = 30). You might also be interested in our kWh to watts calculator. kilowatt hour (kWh) Related category: Power In physics, energy is a scalar physical quantity that describes the amount of work that can be performed by a force, an attribute of objects and systems that is subject to a conservation law. A kilowatt is simply 1,000 watts, which is a measure of power. In this case, the utility would pay a rebate based on the 372 kWh of energy consumption saved over the course of the year from the more efficient lighting. Calculate the electric charge in a circuit using the capacitance and voltage. Instant free online tool for kilojoule/hour to kilowatt conversion or vice versa. 1 kW over a 30 minute period = 1 * 0.5 = 0.5 kWh (using kWh = kW * h, and 30 mins = 0.5 hours) i.e. Also, explore tools to convert kilojoule/hour or kilowatt to other power units or learn more about power conversions. Kilowatt hours is a metric system energy unit. 1 kW.year = 1 kW.h x 24 hours. kWh stands for kilowatt-hour. Take a meter reading. Exchange values and measures from one power unit to another unit by quick calculation. h, are a measure of electrical energy consumption equivalent to one kilowatt of power used for one hour. Expressed in the standard unit of energy in the International System of Units (SI), the joule (symbol J), it is equal to 3600 kilojoules (3.6 MJ).. The amount of electricity you use (or generate) is defined in kWhs. If the car’s battery was completely flat, it would take about 3.5 hours to fully charge — 75 divided by 22 equals 3.4. According to the EIA, in 2017, the average annual electricity consumption for a U.S. residential home customer was 10,399 kilowatt hours (kWh), an average of 867 kWh per month. A kilowatt hour is equivalent to a power of 1,000 Watts being applied for an hour . If your solar panels (for example) continuously output 1 kW of power for a whole 60 minutes, you will have produced 1 kWh of energy.. If a solar panel generates 250 Watts from the sun for five hours each day for 30 days, multiply 250 (Watts) by 5 (hours) by 30 (days) to determine that the panel generates 37,500 Watt-hours per month. 0.350 kWh washing machine consume per day. The kWh/kW(DC) really is an efficiency number indicating the kWh produced for each kW DC of your system over a given period. MWh to kWh formula. Gas Consumption. MJ or kwh The SI derived unit for energy is the joule. What’s the difference between a kW and kWh? kWh = kW × hr. To calculate your kWH per month or per year, just multiply by the number of days in that period. It’s common for people to confuse kW and kWh. How much of power from btu per day to kilowatts, btu/d to kW? So, for example, the 10,000 watt electric shower in the top bullet point above could also be called a 10 kilowatt shower. You are currently converting energy units from barrel of oil equivalent to kilowatt hour 1 boe = 1628.2 kWh. Now you know how many kilowatt-hours (kWh) the device uses every day. Since the "hour" unit in kWh/h is canceled out, it follows that expending 10,800 kWh of energy over the course of a year requires a steady power draw of 1.25 kW, or 1,250 watts. Kilowatt-hours. Get real numbers for how solar can power your home’s energy needs. According to the U.S. Energy Information Administration, the average home used slightly under 10,800 kWh of electrical energy in the year 2017. So daily usage is 0.350 kWh, then monthly usage would be 10.5 kWh..35 kWh per day X 30 days =10.5 kWh per month Use our electrical conversion calculators to calculate electrical properties given other known values. kWh to watts calculation To convert kWh to kJ, multiply the kWh value by 3600. If you don't have a formal background in physical science, this unit is likely to be confusing. E = 5kW × 3h = 15 kWh x 365 days (with round-the-clock work) Example. A water heater checks in at 2,500 watts (2.5 kW) and a typical air conditioner is rated at about 1,600 watts (1.6 kW). Therms (US) to Kilowatt-hours table. In Watt’s Law, power is measured in watts and voltage is measured in volts. 1 Kilowatt hour = 3600 Kilojoules. How many kilometers per kilowatt hour in 96 kilowatt hours per kilometer: If eF kWh/km = 96 then eF km/kWh = 0.010416666666667 km/kWh. How many kilowatts ( kW ) are in 1 btu per day ( 1 btu/d )? boe kilowatt hour . U.S. Energy Information Administration: How Much Electricity Does an American Home Use? Kilojoules to Kilowatt-hours formula. The kilowatt-hour [kW*h] to ton-hour (refrigeration) conversion table and conversion steps are also listed. Or, 30 kWh / 5 hours of sun = 6 kW of AC output needed to cover 100% of your energy usage. Use this page to learn how to convert between gigajoules and kilowatt hours. Watts to kWh calculator KWh to watts calculation. If a 100 Watt bulb (power) is left on for 10 hours, it uses 1,000 Watt-hours, or 1kWh. Kevin Beck holds a bachelor's degree in physics with minors in math and chemistry from the University of Vermont. Average kWh per Household. Multiply by the volume correction factor (1.02264). ; Jim Settelmeyer et. ft. U.S. home uses around 1,000 kWh of energy per month or about 32 kWh per day. A kilowatt-hour (kWh) and a kilowatt (kW) may sound like the same thing, but they’re not quite tomato-tomahto. kWh … The standard unit of energy is the joule and can be derived in a number of ways; the most common one is force multiplied by distance. Kilowatt hours is a metric system energy unit. Therms (US) to Kilowatt-hours formula. A kilowatt hour is equivalent to a power of 1,000 Watts being applied for an hour . Step 3: Figuring Usage Over a Month If power is energy divided by time, then a kilowatt-hour must have units of energy because multiplying a unit of power by a unit of time cancels out the time factor in the denominator of the power portion of the unit. For example, a dryer uses about 5,000 watts, or 5 kW, while a range top eats up over 8,000 watts, or 8 kW. kWh … Let’s estimate you get about five hours per day to generate that 30 kWh you use. 1 Kilowatt hour = 3600 Kilojoules. Example: 7,200 watt-hours per day / 1,000 = 7.2 kWh per day. So, the power in kilowatts is equal to the energy in kilowatt-hours divided by the time-period measured in hours. 1 Megawatt hour = 1000 Kilowatt hours. For instance, I have 33-235 watt panels giving a 33*235 = 7.755 kW DC system. The energy E in kilowatt-hours (kWh) is equal to the power P in kilowatts (kW), times the time period t in hours (h): Some household items are notorious power hogs. This on the web one-way conversion tool converts power units from btu per day ( btu/d ) into kilowatts ( kW ) instantly online. For Calculating the energy Usage for a Month, multiply that by 30 to calculate energy usage for the month. to convert 6.5 kWh/m2-day to W/m2 you need the length of the day (not 24hr but sunshine hours )or the average if the data for a week or a month. Divide by kWh conversion factor (3.6). Definition. Includes 3 real-life scenarios for 1 day of solar power in a typical home. Let’s estimate you get about five hours per day to generate that 30 kWh you use. So the kWh divided by the hours of sun equals the kW needed. Power? Amps to Watts Electrical Conversion Calculator, Capacitance to Charge Electrical Conversion Calculator. So a 1,000 watt drill needs 1,000 watts (1 kW) of power to make it work, and uses 1 kWh of energy in an hour. Kilowatts, abbreviated kW, are a measure of electric power. Power multiplied by time equals energy consumption. For a single phase AC circuit the formula to convert kilowatts(kW) to amps is: amps = (kW × 1,000) ÷ volts. Kilojoules to Kilowatt-hours table. Thus, to convert watts to kilowatt-hours, multiply the power in watts by the number of hours, then divide by 1,000. If nothing else, you're probably familiar with the concept of a watt, the unit used to classify light bulbs. The Average kWh per household in the U.S. is 914 kWh. What is Megawatt Hour? If you know from looking at your bill that your electricity price per kWh is 12p, your appliance costs £1.44 per day to run – which can clearly add quite a … My question is, how do i calculate the total energy consumption (kwH) for a day based on series of kW store every minute. Drilling down even deeper, since there are 24 hours in a day, this translates to about 1.25 kWh per hour (30/24 = 1.25). If your solar panels (for example) continuously output 1 kW of power for a whole 60 minutes, you will have produced 1 kWh of energy.. Below is the example of the value of the database. The energy E in kilowatt-hour (kWh) is equal to the power P in kilowatts (kW), times the time period t in hours (hr): E (kWh) = P (kW) × t (hr) So. The kilowatt-hour is a composite unit of energy equal to one kilowatt (kW) of power sustained for one hour. if the day length is 10 hrs The average 2,000 sq. I generate an average of 45 kWh per day now in March. Or is a kilowatt-hour something else entirely? The value inside the database. h, is a measure of energy that is equivalent to 1,000 watts of power for a 1-hour time period. Energy, by the way, has the same units as work and heat, and can be expressed in terms of ergs, calories or British thermal units, depending on the nature of the problem to be solved. Want to know how many days you can watch TV on 50 kWh of solar power? Definition. Convert the amps to watts with our electrical conversion calculator, plus learn the formulas for DC, single-phase AC, and three-phase AC circuits. One Therm (US) = 100,000 BTU59°F = 105,480,400 joules = 29.3001111 kWh. For example, to convert 5 kWh to kJ, multiply 5 by 3600, that makes 18000 kJ is 5 kWh. Ah to kWh Conversion Formula. kWh to kJ formula. Average kWh Per Day. kWh = kJ * 0.00027778 . One kWh is equal to one kilowatt, or one thousand watts, of energy consumed for one hour of time. You go to the store and pick out a “60W” bulb With delta set to 1, the bar graph will draw the total kWh for each day calculated from the kWh value at the end of the day, minus the kWh value at the start of the day. The efficiency is therefore 45 kWh/7.755 kW = 5.8 kWh/kW/day One kilowatt is equal to 1,000 watts, so to figure out the kWh per day that your refrigerator uses, you simply need to divide the watt-hours per day (7,200) by 1,000 for a total of 7.2 kWh per day. Based on the monthly kWh data from the EIA, you can calculate the average kWh per day by dividing the monthly usage by the average number of days in a month. Example, if you have a TV that consumes 0.250kw and uses 4 hours, you should multiply 0.250kw by 4, the result will be: 1kwh (0.250kwx4 = 1kwh) The symbol is "kWh". 1 btu per day ( btu/d ) = 0.000012 kilowatts ( kW ). Plus, check out the formula for the conversion with example calculations. Based on a daily usage of four hours a day, a 32-inch LED TV will use just 50 kWh/year, a 42-inch LED TV will use 80 kWh/year, and a 70-inch screen will use 150 kWh/year. P (kW) = E (kWh) / t (h). To calculate your kWH per month or per year, just multiply by the number of days in that period. 350 watt-hours per day / 1000 =0.350 kWh per day. Energy and work unit conversion between megajoule and kilowatt-hour, kilowatt-hour to megajoule conversion in batch, MJ kwh conversion chart ... kwh↔kW.s 1 kwh = 3600 kW.s kwh↔W.h 1 kwh = 1000 W.h kwh↔hp.h 1 kwh = 1.3428 hp.h kwh↔kcal 1 kwh = 859.8456 kcal kwh↔MMKcal 1 MMKcal = 1162.250116225 kwh What is the energy consumption in watt-hour when the power consumption is 5 kilowatts for time duration of 3 hours? 1 kWh = 3600 kJ. h, are used to measure electrical energy. A kWh is a measure of energy (not power). The kilojoule/hour [kJ/h] to kilowatt [kW] conversion table and conversion steps are also listed. Instant free online tool for kilowatt-hour to ton-hour (refrigeration) conversion or vice versa. The the standard unit of force is the newton, while that of distance is the meter, so a joule is really a newton-meter. I usually do about one load of laundry a night and cook at least twice a day. To do this, you first need to understand what a kilowatt-hour is and why this unit is employed in calculations rather than something more basic. Example: 7,200 watt-hours per day / 1,000 = 7.2 kWh per day. How many loads of laundry you can do? kW to kWh calculator KWh to kW calculation. Solution E (kWh) = 50 (kW) x 11 (hr.) kilowatt-hour: kWh. For example, If the power in kilowatts is 50 (kW) and the time in hours is 11 (hrs. Kilowatt-Hours (kWh) to Kilowatts (kW) Conversion Calculator, Charge to Capacitance Electrical Conversion Calculator, Joules to Volts Electrical Conversion Calculator, Volts to Joules Electrical Conversion Calculator, How to Convert Kilowatt-Hours to Kilowatts, Electrical Property Conversion Calculators, Amps to Kilowatts (kW) Electrical Conversion Calculator. In this system, the reading of kW for each device is store in the database for each minute. To convert kWh to kJ, multiply the kWh value by 3600. Calculate energy Usage for a Month. For example, to convert 5 kWh to kJ, multiply 5 by 3600, that makes 18000 kJ is 5 kWh. A kilowatt hour (kWh) is a measure of energy. Note: Kilowatt hour per kilometer is a metric unit of electric car energy economy. Note that rounding errors may occur, so always check the results. , then the power result in kilowatts will be 9 (kW). The difference is that kW is a measurement of power, while a kWh is a measurement of energy. The efficiency is therefore 45 kWh/7.755 kW = 5.8 kWh/kW/day For example, to convert 5 MWh to kWh, multiply 5 by 1000, that makes 5000 kWh is 5 MWh. ), which means that the energy in Kilowatt-hours is calculated by multiplying the power in Kilowatts by the time in hours. If, for example you consume 100 kwh in a day at 240VAC and assume a steady state load, that's 100 kwh divided by 24 hours, or a 4.17 kw load. The formula: Watt hour = Ampere hour * Voltage 1kW = 1000W Related Calculators. Let’s say we’re charging a 75 kWh EV from a 22 kW wall box. Kilometer per kilowatt hour is a metric unit of electric car energy economy. Power multiplied by time equals energy consumption. Or are these the same? A kWh is a measure of energy (not power). Example: Over the course of a 30-day month, your fan would use (1.25 kWh / day) x (30 days / month) = 37.5 kWh per month. The power P in kilowatts (kW) is equal to the energy E in kilowatt-hours (kWh), divided by the consumption time period t in hours (h):. Let’s say we’re charging a 75 kWh EV from a 22 kW wall box. Solution E (kWh) = 50 (kW… Customers in some areas, like Texas, consume even more. Of course, the main issue here for anyone who pays an electric bill is to understand consumption, how it might fluctuate over the course of a year and what might be done to lower consumption in a given period of time without compromising essential home or workplace functions. The kilowatt-hour is a composite unit of energy equal to one kilowatt (kW) of power sustained for one hour. With the heat pump furnace running at it set on 70 degrees with it being 30-45 degrees out. That means the average household electricity consumption kWh per day is 28.9 kWh (867 kWh / 30 days). I generate an average of 45 kWh per day now in March. Does it represent energy? The symbol is "kWh". or. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. kWh = Therm(US) * 29.300 . Scale & Units: If the feed is in watt hours, the scale can be used to convert it to kWh by multiplying by 0.001. i.e. kJ = kWh * 3600. kWh calculator. The power output value is shown in kilowatt hour (kWh) as well as watt hour (Wh). Energy consumption calculator. Methodology. Get our all-in-one calculator app to use this Ah-kWh converter offline. What is Kilowatt hours? Divide by kWh conversion factor (3.6). if your source data has readings in kWh but you treat them as if they are in kW, everything that you calculate from that point on will be working on the assumption that your energy consumption is half what it … barrel of oil equivalent . The US ranges from about 4 hours – 6 hours of sunlight per day, on average, see the below map. 1 joule is equal to 1.0E-9 GJ, or 2.7777777777778E-7 kWh. 2,400 watt-hours per day / 1000 = 2.4 kWh per day 2.4 kWh per day * 30 days in a month = 72 kWh per month There are also several online resources and calculators that can help you with this, if you prefer that to pen, paper and calculator! How to convert kW to kWh in only 1 step. More about Kevin and links to his professional work can be found at www.kemibe.com.