Number of motor (s): Maximum current (A) needed per motor: Max. To Increase Your Run-Time: Add more batteries and/or increase battery voltage from 12V to 24V. Hence, the final version of the battery capacity formula looks like this: E = V Q, where: E - Energy stored in a battery, expressed in watt-hours; V - Voltage of the battery; and Q - Battery capacity, measured in amp-hours. For more on that, I suggest to read the manual or ask your supplier. Watt Hour to Amp Hour Conversion Calculator Amp Hour to Watt Hour Conversion Calculator This calculator converts a battery or battery packs Watt hours (Wh) rating into its Amp Hours rating. Easy! The amount of cells only determine the voltage (V) of your LiPo, as needed for your equipment. Capacity (Amp-hours) . However, when you calculate the battery capacity of 100Ah and get 1,200Wh, you can quickly figure out how long the battery will last: You have a 1,200Wh battery. Calculate total work hours with lunch and breaks. If not, you can calculate it as Volts x amp hours (Ah). For information on how this calculator works see How to calculate the Watt Hours (Wh) of a lithium battery. You simply divide 1,200Wh by 400W and get 3 hours. RC LiPo Charger and Power Supply Calculator Watch on Max Charge Rate due to Power Supply Wattage Enter the battery capacity in mAh and Charger Wattage in watts. A discharge of 1C draws a current equal to the rated capacity. Don't push the LiPo. This fact is very important to keep in mind, when choosing a LiPo battery. For comparison, laptop batteries have energy output in the range from 22 Wh to nearly 100 Wh, depending on brand and type. See total work hours in hours and minutes hh:mm format as well as decimal hours. And then of course there's using a meter. You may use the calculator to simply run through all the specifications for either one battery pack or two battery packs! You may need to know the watt hour (Wh) rating of a lithium battery to determine how it should be shipped or to ensure you conform to regulations regarding air travel with lithium batteries. If you want to further convert watt-hours to joules, you can also try another of our calculators, namely the energy conversion calculator. For standard AA or AAA batteries, you do not need to use amp hours, as their rating is provided in milliampere-hours (mAh). Q (mAh) = 1000 E (Wh) / V (V). The C Rating's charge or discharge time changes proportionally to the rating. C bat is the battery's rated capacity in Ah. How do you calculate watt-hours? You have to divide your LiPo pack capacity (mAh) by 1000 in order to convert from mA to A. The power and configuration calculator has been created to assist models in making sure they have all the information they require to purchase application matching battery packs. Battery Capacity (mAh) = 25 Charge Rate Current (mA) = 30. And a 2C charge rate would be of this double or 10 A. How Do You Calculate Lithium Ion Battery Watt Hours? A 36-volt 10-Ah battery pack has 360 watt hours (36 X 10 = 360). Dec 20, 2013, 02:17 AM. The battery's capacity is defined in mAh. Run-Time Calculator Assumptions Batteries are 100% charged to start and will only draw down to 50% - lead acid batteries only. ), what will be the energy in Kilowatt hours? There are also 24 hours in a day. Example 2: Must calculate the ampere-hours of a battery to have 100 watt-hour capacity at 7.2 volts. You can convert Watt-hours to Amp-hours by dividing by the battery's nominal voltage (V) as follows: Ah = Wh / V +More Battery Life Battery Capacity Device Consumption Battery Life Formula TIME FORMAT: Estimated Battery Life: *Based on ideal conditions. On the other hand, voltage is expressed in volts (V) and describes the "pressure" that causes electricity to flow within a circuit. A LiPo battery consists of multipe cells. hours. Then Discharging Time=Battery Capacity * Battery Volt*0.9 / Device Watt 5Ah*3.7V*0.9/10W = 1.66 hours Let's explain with more examples: for a 1800mAH 3.7v 18650 battery to power a 3.7V 10W digital device, how to calculate the running time? The simplest formula is : I = Cr * Er or Cr = I / Er Where Er = rated energy stored in Ah (rated capacity of the battery given by the manufacturer) I = current of charge or discharge in Amperes (A) Cr = C-rate of the battery Equation to get the time of charge or charge or discharge "t" according to current and rated capacity is : t = Er / I This online time clock uses a standard 12-hour work clock with am and pm or a 24-hour clock for military time. How much Current is my Brushless RC Car Motor Going to Draw? Convert mAh to Watt hours. 1C is equal to 60mins, 2C is equivalent to 0.5h or 30mins and a 0.5C rating is equivalent to 2h or 120mins. You can use the numbers printed on a battery to calculate a number for its capacity in Wh if its not already there. Solution: Apply formula: If your lithium battery does not include a watt hour (Wh) rating on the casing you can calculate it by using the voltage and mAh or Ah capacity. The power produced by the 2S pack will be 370W. It is designed to calculate the maximum battery charge time for any given chargable battery, based on the entered information. The equivalent of 10000 mah is around 3.7 watt-hours or 3.7 amp-hours. The table displays calculations based on the information given. No matter how big or how small, the first step is always calculating how many watts . Most people read time using either a 12-hour clock or a 24-hour clock. 100Ah battery run time = available capacity / load / inverter efficiency, so. A 100Ah battery will run a fully-loaded 100 watt inverter for = 600 / 1000/ 0.95 = 0.63 hours. Welcome to our watt-hour calculator, which allows you to convert electric charge in milliamp hours to watt-hours expressing the electrical energy transfer (power) of the system. So, if you have 100 watts running over four hours that equals 400 WHs (100400). Example: Calculate the flight time, current drawn from the LiPo battery of your quadcopter and other important characteristics for your quadcopter, battery charger specifications if the maximum current per motor is 10 amps, maximum current drawn by other copter equipment is 2 amps; your drone uses a 5000 mAh 7.4 V 30C LiPo battery and the . Please use a special build LiPo battery charger and NO OTHER! Hi FolksI have people asking me a lot of questions about chargers and which should they get and why they need a high watt charger when the lower watt charger. Battery specifications are at C5 Rating A constant current draw of 20A from a 2200mAh LiPo will get you:( 2200mAh /1000) / 20A = 0.11 x 60 = 6.6 minutes flying time. For example, if a gadget uses a 2500 mAh battery, a 10000 mah battery will last roughly 4 hours. With 90% Power efficiency for Li-ion/LiPo batteries. = 550 Kilowatt-hours. This calculator will tell you how long your battery will run. E (kWh) = P (kW) x t (hr. These cells deliver approx. 1/12 * 500 = 42 watt hours + 5.5*24 = 174 watt hours. This applies to lithium metal batteries (disposable) and lithium ion batteries (rechargeable). C alculator default set to 1x 10.24kWh NiFePo4 Battery! The Electricity Retailers dirty secrets they don't want people to know: How to make the Electricity Retailers Redundant! LiPo Calculator for multicopter Move the sliders according to your setup. E = V I T Hopefully, you remember that amp hours are a measure of electric charge Q (the battery capacity). To calculate the watt hours (WH) of a battery pack, simply multiply the voltage by the amp hours (Ah) of the pack. The calculator will calculate the battery life if the Watt Hour and the battery voltage is known. This is usually stated on the battery itself (see Image 1). If not, keep in mind a maximum charge rate of 1C. Move the sliders according to your setup. An hour is most commonly defined as a period of time equal to 60 minutes, where a minute is equal to 60 seconds, and a second has a rigorous scientific definition. It's advisable to stay on or below nominal discharge level to preserve battery future life. Please notice that current draw depends on your way of flying and external factors such as resistance, weight and wind. The power produced by the 10S pack will be 2100W. For example, If the power in kilowatts is 50 (kW) and the time in hours is 11 (hrs. This will warn you when the battery is drained before it's fully empty (20%). Note: If the capacity of your battery is expressed in milliampere hours (mAh)like in the image above you will need to divide by 1,000 to calculate the ampere-hours (Ah) before multiplying. E bat is the watt-hours of rated energy stored in the battery., V bat is the battery's rated voltage in volts, and. How to calculate watt-hours To calculate the relationship between charge in amp hours and voltage in volts, the formula should be used: \rm Wh = Ah V Wh = Ah V 1 amp hour is equal to 1000 milliamp hours, so if you want to convert watts to kilowatt-hours you can simply divide the result by 1000: \rm Wh = mAh V / 1000 Wh = mAh V/1000 The watt-to-hours calculator will find the final result in various units. Appliance draws 400W. For Watt-Hours/Day, please use our kWh Calculator. It may be used to calculate the run duration of devices that demand a certain amount of watts or amps. Or 1mA for 1000 hours. Watts to Wh calculator Enter the power in watts (W), time period in hours (h), then press the Calculate button to get the result in watt-hours (Wh). Here's how to calculate its total energy consumption in watt hours: 50 W 3 hrs = 150 Wh So the fan's total energy consumption that night was 150 watt hours. This advanced online Battery Charge Time Calculation tool is used to calculate the maximum charge time of batteries, based on the entered information. Are you looking for what the best sized lipo battery for your devices? Voltage. The charge time depends on the battery chemistry and the charge current. The minimum need is based on the maximum needed current (Ampre) drawn from the LiPo. Lithium batteries draw down further. Select a 2nd battery pack cell count if you want to check your wiring of two different packs. The key is to use the watts you know to calculate the amps at the battery voltage. So we have 14.8V x 2.2Ah = 32,56 Wh. For example, say you want to run a 250 watt 110VAC light bulb from an inverter for 5 hours. Adjust flying load according to your wishes. First, recall the voltages of various size LiPo batteries: 2 cell LiPo = 8.4V max 3 cell LiPo = 12.6V max 4 cell LiPo = 16.8V max 6 cell LiPo = 25.2V max Why do we convert amp hours to watt-hours? The Amp hour rating can be useful to know when purchasing new batteries that are rated on Amp hours. 88.000 mAh / 1000 = 88 Ampere constant discharge rate. not 23w. 2200mAh x 40C = 88.000 mAh discharge rate 1 kWh = 1000 Wh. Select a 2nd battery pack cell count if you want to check your wiring of two different packs. amps = watts / volts. For Monthly kWh, check your monthly kilowatt-hour usage printed on your electric bills. Multiply these two numbers to get the watt-hour rating (Ah V = Wh). To calculate the relationship between charge in amp hours and voltage in volts, the formula should be used: 1 amp hour is equal to 1000 milliamp hours, so if you want to convert watts to kilowatt-hours you can simply divide the result by 1000: Let's say you have a lithium-ion polymer battery that has 1200 mAh and a nominal voltage of 3.7 V. When we use our converter, we can directly calculate the energy of the battery in watt-hours: In this example, your battery has a capacity of 4.44 Wh. So that's why the combination capacity/discharge rate is of such importance for selecting the right LiPo for you project. 50Ah in watt-hours = 50Ah x 12 volts = 600 watt-hours. t = 1/Cr to view in hours or to view in minutes use time = 60mins / Cr (c rating) Examples of Different C Rating Calculations Don't miss our electrical power calculator. Convert mAh to Watt hours. Should I upgrade to a Gel Battery for my trolling motor? Note that there are battery run-time calculators on the web that are very wrong. Battery capacity is typically measured in Amp-hours (Ah) or milliamp-hours (mAh), although Watt-hours (Wh) is occasionally used. Max. A drawn by other equipment (lights etc.). Therefore, 1C charge rate for battery with 5000mAh is 5A. The equation is simple. For the Yes part, for battery packs that draw working current less than 5A (like power banks), you can calculate the cost by about 1.5 USD/2.6Ah Chinese 18650 battery cell, 2USD/2.6Ah Korea cells. Insert milliamp hour (mAh) and voltage (V) and click on Calculate to obtain Watt hours (Wh). Overcharging can cause your LiPo to catch fire and burn your belongings to Kingdom Come. Say, 1200Ah x 48V 1000 Watts =12 hrs (with 40% loss at the max = 48x401000 =1.92 hrs). This battery life calculator estimates how long a battery will last, based on nominal battery capacity and the average current that a load is drawing from it. Actually, watts is the fundamental unit of power and watt-hours is the energy stored. . The electric charge Q (mAh) in milliamp-hours (mAh) is equal to 1000 times the energy E (Wh) in watt-hours (Wh) divided by the voltage V (V) in volts (V):. Knowing the hour rate of your battery, its . You can only change the RED cells. So a 36 volt 10-Ah pack has 360 watt hours and a 52V 10-Ah pack has 520 watt hours. Therefore a 360 watt hour pack will get you about 18 miles. So, a 4000mAh LiPo can be charged at a maximum rate of 4000mAh / 1000 = 4A. Formula is (mAh)*(V)/1000 = (Wh). Watt-hours = milliamp-hours x Volts / 1000, which means that the watt-hours are calculated by multiplying the number of milliamp-hours by the volts then dividing the result by 1000. 12 Volts x 33 Amp Hours = 396 Watt Hours or roughly 400 Wh. 32,56 Wh x 3 = 97,68 Wh. Enter numbers such as 1215 for 12:15 or 137 for 1:37. It's important to know that the battery cells don't count up for maximum current draw. This applies to lithium metal batteries (disposable) and lithium ion batteries (rechargeable). Your output will be displayed. As we told earlier, the safest charge rate for LiPo batteries is 1C. In other words, one watt-hour equals one watt of average power flow over an hour. A 3S 2200maH 40C LiPo pack will get you this: The battery capacity, together with the LiPo battery's discharge rate will define its maximum current output (Ampre, A). (c) 2012 multicopter.forestblue.nl. This calculator will tell you what battery size you need. Enter your capacity Amp-Hours and your discharge in Amps in the form below and press the "Compute" button . You can now calculate as - 4.4Ah x 11.1 volts = 48.8Wh example 2: a 12 volt 50 Ah battery - 50 Ah x 12 volts = 600Wh If you need it our Lithium battery watt hour calculator will work out your results for you. If we talk about the Ampere, it is an electrical unit that used to calculate the actual flow towards the heap. View example. To calculate your battery's watt hours, you'd multiply 50Ah 12V: 50 amp hours (Ah) 12 volts (V) = 600 watt hours (Wh) In this example, your battery has a capacity of 600Wh. Voltage is typically fixed for different types of batteries and depends on type of internal chemistry (alkaline, lead acid, lithium, etc. An example of this would be that the Yeti 400 contains a 33 Amp Hour battery operating at 12 Volts. Lithium-Iron (LiFePo4) Battery Calculator Ah to kWh Battery Charge or Discharge. To use our tool, you only need to go through a few steps: You can also convert watts to kilowatt-hours. This page is a quick run-time calculator to help you estimate the run-time based on simple assumptions. This applies to lithium metal batteries (disposable) and lithium ion batteries (rechargeable). Just specify: Our watt hour calculator allows you to use electric charge in milliamp or amp hours and voltage in volts to calculate the energy in watt-hours or joules. 0.05C is the so-called C-rate, used to measure charge and discharge current. Watts to Wh calculation Power in watts (W) Time period in hours E(Wh) = P(W) t(h) The energy E in watt-hours (Wh) is equal to the power P in watts (W), multiplied by the time period t in hours (h). youDesign by Free CSS Templates. :: Events :: News, Details & Links. Load Voltage (Vdc) Duration (hours) Remaining charge (%) Cable size calculator AS/NZS 3008 Wire size calculator NEC Maximum demand calculator AS/NZS 3000 Parameters Load type (ampere or watt): Select the unit in which the load will be specified, ampere or watt. If you are nitty with your energy usage, each mile you travel will cost you about 20 watt hours. Are you looking for lipo battery size chart? Amp-hour calculation: 10: Total watts Daily requirements Watt-Hrs d-1: 11: Corrected for battery losses Assumes static average loss Watt-Hrs d-1: 12: System voltage DC voltage only: . Using a colon is . Most batteries cases say something like "25C to 40C" discharge rate. AMPS = WATTS / VOLTS Using this formula allows us to figure out a charger's maximum amperage capability for batteries of different sizes. Preferably, always use a LiPo low battery warner on your RC device. So we calculate the power capacity as Volts times Amps times hours equals capacity in Watt-Hours. A 400 Watt inverter will struggle with this power. There are ohms calculators online you can use and you only need to enter two values and it figures out the rest for you also there is an app that you can use where you pick out every detail of the build (they show you photos of coils and you touch the one you made) what gauge how many wraps etc. Amp hours the shortened name of ampere-hour indicates how much charge can flow through a battery per one hour. By measuring the amount of instantaneous power consumed by an appliance and multiplying that by time in use, you can calculate the total electric charge. The calculator will calculate the missing value of the first three entries; one must be left blank. ( read our article on calculating range) Once you get to 1000 watt hours, its called one-kilowatt-hour, and that's how electric car packs are measured. Or, to use the abbreviated measurement, the answer would be 1440Wh. This means that 25C is the nominal discharge rate and 40C is the maximum burst discharge rate. Average run cycle is 10 hours. V. A drawn by other equipment (lights etc.) This quick and intuitive watt-hour calculator is a tool that allows you to convert electric charge in milliamp or amp hours to watt-hours describing energy. Not all brands say something about the peak discharge rate on the battery itself. ), which means that the energy in Kilowatt-hours is calculated by multiplying the power in Kilowatts by the time in hours. Why Convert Amp Hours to Watt Hours? is rated at 96 watt hours (12 x 8 = 96). The higher voltage means that more electricity can flow in an electric device. As a point of reference, the average refrigerator uses 500 kWh per year or 50kWh per month and 5000 kWh would be equal to five hundred thousand watt-hours. However, like watts calculator, watts, amps, volts calculator is available in the market to provide the electric detail and the tool's power consumption. Check out 87 similar electromagnetism calculators , Acceleration of a particle in an electric field, Milliamp hours to watt-hours an example. Easy enough! Example 1: Must calculate the watt-hour capacity of a car battery having a voltage of 12 volts and capacity of 60Ah. View example. The following formula is used to calculate the Rated Energy in watt-hours contained in a battery: E bat = V bat * C bat E bat = 11.4V * 2200mAh = 25.08 W h. Where. For NiFe, for example, using Solar this could typically be <65% of the Ah rating for 4~6 hours. Apart from the cells, a discharge rate is defined by the letter 'C'. The table displays calculations based on the information given. If you don't know, leave it on the default 30%, which is quite normal. The battery size calculator calculates the battery size in ampere-hour (Ah). amps = volts / ohms. Watt hours are calculated by multiplying the volts by the Amp-hours. mAh. Other chemistries, such as LiFe & LiMh batteries will be different. 12-hour clock: A 12-hour clock uses the numbers 1-12. Espaol Franais. Most LiPo vendors will tell you what the maximum charge rate of the battery is. You come the right place here, below are general chart of cell and lipo battery pack, include capacity, demesions, Voltages, discharge rate, weight, width, height, height, Configuration etc. If not, then it can be measured as; Volts x ampere hours (Ah) = Watt hours Example 1: A 4,400 mAh 11.1 volt battery Divide the mAh rating by 1,000 first to get an Ah rating of 4,400/1,000 - 4.4ah. This Off-Grid Solar System Sizing Calculator helps you size the battery bank, Watts of solar power, and charge controller you need for an off-grid solar system. How fast can a Sealed Lead Acid rechargeable battery charge? View example. Therefore, a LiPo warner will let you know when voltage levels become lower then 20%. Converting amp hours to watt hours makes it easier to compare how much energy different batteries can deliver. Flying load is based on type of flying and/or weight of the copter. Power consumption (Watt) is not really a factor for choosing your LiPo. You can convert Watt-hours to Amp-hours by dividing by the . Calculating the Energy 174/12 = 14.5AH/day. Here is the formula Battery Life = Watt Hours / ( Voltage x Current in Ampere) You may also like to check Watt Hour Vs Ampere Hour if the battery capacity has been defined as Watt Hour. 3.7 Volts. Selected flying load will help you define the maximum flying time based on selected mAh capacity. For example, a battery rated at 1000mAh provides 1000mA for one hour if discharged at 1C rate. mAh to Wh calculator Watt-hours to milliamp-hours calculation formula. See also: Air travel with lithium batteries Shipping lithium batteries How to calculate the lithium content of a lithium battery If you need it our Lithium battery watt hour calculator will work out your results for you. = 2.64 minutes. Do you want to know how to calculate the power consumed by your electrical devices? Whether you have a 2200mAh 2S pack or 10S pack, if you draw 50A it'll theoretically last 2.64 minutes. V. Wh. In short, a 100Ah 12V battery will run a 400W appliance for 3 hours. The first step in figuring out how many solar panels you need and what size of off-grid solar power system will work for you, is to know how much energy you use on a daily basis. RC Lipo Battery. amps = watts / ohms. Adjust flying load according to your wishes. You can measure the amount of energy you consume with two simple tools: a Kill-A-Watt meter and a clock. by using the watts formula, you can check and calculate the accurate electric measurements of your tool. A battery with a 1000mAh capacity can deliver 1 Ampere (1000mA/1000) for 1 hour. The combination of capacity and discharge rate is what you will need. Battery Capacity (Ah): Application Consumption (Amps): Battery Type: Results (Hours): What size battery do I need Battery Size: I have this (app) application and I need it to run for (X) hours, what size battery will I need? The Ultimate Off Grid Solar Power Calculator - Figure out how much solar you need. Solution E (kWh) = 50 (kW) x 11 (hr.) VIDEO How a zinc-carbon battery is made, VIDEO How an alkaline based battery is made, VIDEO How a nickel based battery is made. Needed voltage amount (3.7V steps): MaH select: All calculations for efficiency loss will be done no matter which value you are trying to calculate. The formula for calculating watt-hours is Watts x Hours = Wh. mAh means milli-Ampere per hour. If you want to determine what is a watt-hour, it is the total amount of generated or consumed energy over a period of time (an hour). If your lithium battery does not include a watt hour (Wh) rating on the casing you can calculate it by using the voltage and mAh or Ah capacity. Example: Calculate the maximum time taken by a battery to charge by the given details. A 4S LiPo would therefore supply 14.8V. Sometimes you can conclude that a battery with higher amp hours can provide much more energy, but you should always take into account the nominal voltage at which the battery is operating. 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