You know it's a 3.7 volt lithium ion battery and you want to find out how many milliamp hours it is. What is the battery capacity in Wh? Use our interactive calculator to easily convert amp hours to watt hours (Ah to Wh). The power P in watts (W) is equal to the power factor PF times the phase current I in amps (A), times the RMS voltage V in volts (V):. If you are using a different voltage battery the amp-hours will change by . The total energy a battery can provide depends on both its amp hours and voltage, so only comparing amp hours can lead you to some erroneous conclusions. I want to use two 100 watt devices, through a 300 watt inverter or a 12v to 24v step up \ booster depending which is more efficient??? So when you see Ah being used to express battery capacity, youll know that this number indicates the charge capacity of this battery. However, there are other units of energy. The setup with 100W panels and 600Wh solar inverter might be a bit too small to run a 1,500W device. Formula: kilowatt hours = amp hours volts 1000, Calculator: Amp Hours to Kilowatt Hours Calculator. I have a led acid 12v 200ah tubular battery. To convert watt hours to amp hours, simply divide watt hours by volts. Below does not consider only 50% max depletion of batteries (Just like how 1 kilometer is equal to 1000 meters.). . (Watts, kWh, $), 120-Gallon Propane Tank Dimensions (Horizontal + Vertical V-120), 1000-Gallon Propane Tank Dimensions (Length, Weight, Etc. Such a battery has an amp range of about 50Ah that you could also verify by using this calculator. In addition, one of the most important parts of planning your solar battery system is estimating your energy demand. American Bass 12V 35 Amp Hours 900 Watt AGM Battery STEALTH 350. I (A) = P (W) / V (V). Climatebiz experts design, research, fact-check & edit all work meticulously. Thanks. After all, things like wire gauge, fuse size, and max charge and discharge rates depend on amperage, not wattage. There are some types of batteries, such as solar generators, that by convention tend to describe their capacity in watt hours. The key to this conversion is knowing that: 1. Hope this helps. You can also check the battery amps hours chart for 12V and 24V batteries here. One is a unit of energy (Wh), and the other is a unit of charge (Ah). Amp Hours Vs Watt Hours. It expresses the amount of power sustained (store/delivered) for one hour. Meanwhile, Watt-hour is a unit of electrical energy. Let's say your buddy tells you he built a 3.5kWh 24V solar generator. Amp-hour is commonly used to express battery capacity. A 12V 2 ah battery has 24 watts for 1 hour. In terms of units: Watt-hours = Amp-hours x Volts Or simply Wh = Ah x V. Example 1: You have a 12V battery with 200Ah of capacity. Sure, Greg, these are the best batteries we have. What are amp hours on a 12-volt battery? For example, if you have a 2 Ah battery rated at 5 V, the power is 2Ah * 5V = 10Wh. (Just like how 1 kilometer is 1000 meters.). Here's are some tables converting amp hours to watt hours at common DC voltages. You can find the Ah to Wh calculator here: We have also used the calculator to produce an amp-hour to watt-hour conversion chart for the most common Ah values (at 120V and 220V): Batteries run on 12V or 24V voltage. It can be positive (protons) or negative (electrons). When you login first time using a Social Login button, we collect your account public profile information shared by Social Login provider, based on your privacy settings. Here are conversion charts converting watt hours to amp hours at common DC voltages. 12*60 = 720 watts. Free shipping. In this example, your car battery has a capacity of 1200 watt hours. Now the formula for charge (Amp-hours = current x time) appears in the formula for energy. For battery packs that are wired in parallel enter the Volts rating of one of the batteries in the pack and the combined Watt hours rating of all the batteries in the pack . Looking at the watt-hour (energy capacity) of each battery, we notice that: See? Energy: energy exists in various forms: thermal, chemical, nuclear, mechanical, electrical, etc. AC single phase watts to amps calculation. Amp-hour short for Ampere hour is a unit of electric charge. To calculate its capacity in milliamp hours, you'd do the following: The phone battery has a capacity of around 3351mAh. Once you convert amp-hours into watt-hours, the calculation becomes much much easier. Im a DIY solar power enthusiast on a journey to learn how to solar power anything. Power: the amount ofenergytransferred or converted per unit of time. In this example, your car battery has a capacity of 1200 watt hours. Can someone help me with the calculations on this please. my run time for simplicity if at 640Ahs 10amps @ 48vdc= 64hours run time. 41.67A x 20 Hours = 833.40AH. If we do a dimensional analysis, well see that amp hours is equivalent to coulomb (C): [C] = [1A] x [1s] (current times time) and [Ah] = [1A] x [1h] (current times time), The only difference is that one uses seconds, and the other uses hours to measure time. The most often cited advantage of high voltage systems is the reduction in cost of the wiring. $299.99. The voltage (the pressure with which the current flows through the circuit) is considered with Wh. I have a 300 amp hour LiFePo4 battery and the label on the side of the battery says that there are 3840 watt hours fully charged, I am guessing at 120V. With these two numbers, you can find your generator's amp hours by dividing its watt hours by its voltage: In this example, your solar generator has a capacity of 60.9Ah. Let's say you have a 2000Wh LiFePO4 battery. Let's say you have a 12V 50Ah car battery. Do you see the logic here? In short, you need to multiply the Ah by the systems voltage. To calculate your generator's amp hours, you first need to find its battery voltage. How to add more solar panels to an existing system. Notice that the voltage is the difference between the last equation and the equation for charge capacity (Charge capacity = current x time). The Watt-Hour capacity of a battery bank is the sum of all the batteries connected in the system. SEER = (1 EER100% + 42 EER75% + 45 EER50% + 12 EER25%)/100, Total Heat (BTU/hr.) DC amps to watts calculation. If you are using 100W solar panels in a location with 5 peak hours, one such panel will generate 0.5 kWh per day. What time is it in Valdivia? Voltage is like the water pressure, while amperage is like the flow rate. In the field of electricity, you can also calculate power using: With these things in mind, youll easily understand the conversion from Ah to Wh. You dont have to guess the voltage, you can simply calculate it by dividing the watt-hours by amp-hours; the result is the voltage. To compare different batteries in terms of how much power they can provide and for how long, you must use watt-hours (energy capacity). I actually received permission to post this in full. Hello George, of course. Your at 48v 165ah battery bank To calculate watts-hours from amp-hours, we need to use the following formula: As we can see, amp-hours multiplied by voltage equals watt-hours. An average fridge runs from 1 kWh to 2 kWh per day. To help you out, we provide you with a calculator that does . Enter the capacity of your battery in amp-hours (Ah), Enter the voltage of your battery (12,24,48v), Click on the calculation field to get the result. Dividing the 2,048 watt-hours by the 51 volts gives us exactly 40 Amp-hours. Climatebiz is reader-supported. As you have correctly suggested, you have to factor in the losses that are specific to different batteries (lead batteries may have max depletion of 50%). P (W) = PF I (A) V (V). As we know solar panels are rated in watts so yea. The phase current I in amps (A) is equal to the power P in watts (W), divided by the power factor PF times the RMS voltage V in volts (V): Electricity can be thought of like water flowing through a pipe. To convert watt hours to amp hours, simply divide watt hours by volts. In short, energy is the capacity for doing work. (amp-hour) to kWh(kilowatt-hour) Electrical energy is measured in kilowatt-hours(kwh) or kw-h 1 kWh = one kilowatt of energy consumed for 1 hour of time . When you buy through links on our site, we may earn an affiliate commission. Volts. As always, feel free to reach out to us in the comment section or the climatebiz forum if you have any questions. A watt has the same dimensions as energy divided by time. We also get your email address to automatically create an account for you in our website. Tuesday: 8:30 AM - 4:00 PM. how many solar panels, how big the inverter..what else i need..i have the sun..live in P.R..please heeeelpi cannot deal with all those numbers..just tell me what do i need to buy. Maybe you can specify a bit more and we can help you out further. Once we do, we can make an apples to apples comparison of the amount of energy they can provide. Ah. I have a fordexpition 2002 comper and I was trying run a 840watts A/c but works for few minutes the than the battery gets low the alternator is charging good and the battery is good. So if you were to compare these two batteries simply using their amper values, you would think the lead-acid battery has a higher capacity, but that would be wrong. We may earn an affiliate commission when you buy through links on our site. Confused? For example, consider these two batteries of mine, which I'll call Battery A and Battery B: Battery A is a 36V 12.8Ah ebike battery, while Battery B is a 12V 33Ah lead acid battery. That is also wired in series. Chile (Provincia de Valdivia, Los Ros Region): Current local time in & Next time change in Valdivia, Time Zone America/Santiago (UTC-4). If you continuously draw 100 amps from this battery, youll completely deplete it in one hour. For instance, a 12V LiFePO4 battery actually has a voltage of 13.6V when fully charged. Hello Danielle, sadly there is no one-size-fits-all answer here. It has no relation to the amount of energy that this battery can provide. Or would you rather convert amp hours to watt hours? If you draw 20 amps continuously, how many hours will it take you to discharge this 100Ah battery fully? Can you connect solar panels directly to a battery? Formula is (Ah)* (V) = (Wh). Thursday: 8:30 AM - 4:00 PM. When you reduce that guessed 120V to 12V, you get the results in the chart. (And 1 hour = 3600 seconds, so 1Ah = 3600C). Need to convert Ah to Wh? The LiFePO4 battery in the example above had a 166.67Ah capacity. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); document.getElementById( "ak_js_2" ).setAttribute( "value", ( new Date() ).getTime() ); Climatebiz is reader-supported. Watt-hours is the unit of electrical energy. If energy (in Wh) is the amount of power (in watts) sustained for an hour and power is the product of current (in amps) and voltage (in volts); then replacing the formula for power with the formula for energy results in: Notice something familiar? So, to convert amp hours to kilowatt hours, you first convert the amp hours to watt hours and then divide by 1000. . This means our battery's max charge rate is around 83.33 amps, and we can design our solar power system so we don't exceed that limit. Thats wired in series. In the chart above it says that 20 amp. Doing so will help you determine the size of your battery system. American Bass 12V 35 Amp Hours 900 Watt AGM Battery STEALTH 350. 1 kilowatt hour is equal to 1000 watt hours. Insert the Amp hours (Ah), voltage (V) and time in hours (h) below and click on Calculate to obtain Watts (W). Does this answer the question? A kilowatt is 1,000 watts, and a kilowatt hour represents 1,000 watt hours. The power consumption of a 12 volt, 1.2 watts LED light is 0.1 amps since 1.2 watts / 12 volts equals 0.1 amps. Even Tesla uses them. (Just like how 1 meter is 1000 millimeters.). To calculate its capacity in watt hours, you'd do the following: In this example, your phone battery has a 11.1Wh capacity. Hope this helps. This is how long a fully charged 12V 41Ah car battery can sustain 1,500W output. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. Hello Charlie, a 12V 150Ah battery has a 1,800Wh capacity. Watt-hours = watts * hours = 250 watts * 5 hours = 1250 watt hours 20.833 amps. You wonder: How many amp hours is his generator's battery? You guessed it right, 5 hours. Example: How many watts are in an 80Ah 12V car battery? Therefore, weve confirmed that an amp hour is a unit of charge. However, CCA lead acid batteries usually have a discharge rate of about 50%. How many watts is a 12V 100AH battery? watt hours = amp hours x volts. To convert amp hours to watt hours, simply multiply amp hours by volts. I plugged a space heater into the inverter and it could not power but I was told this setup could power my travel trailer. A 12V 500 ah battery can output 6 KiloWatts for 1 hour. Im a DIY solar power enthusiast on a journey to learn how to solar power anything. To convert Ah to Wh, you simply multiply Ah by the systems voltage. . As an Amazon Associate I earn from qualifying purchases. . So, to convert amp hours to kilowatt hours, you first convert the amp hours to watt hours and then divide by 1000. Using this equation, we can accurately convert watt-hours from amp-hours. 3. Sorry for my confusion, please explain. This goes to an alternator which then outputs 220v-240v to a device which uses 1500w. Converting amp hours to watt hours makes it easier to compare how much energy different batteries can deliver. You could try running the heater on the lowest possible setting and see if that works. I have (6) 2VDC (UPS DEEP CELL) 165 Ah batteries wired in series to a12vdc string. This bad boy is measured at around 2,048 Watt-hours, with a voltage of approximately 51.2 V. Knowing these two values allows us to determine the amp hours using simple division. Note: Most people use a battery's nominal voltage when calculating amp hours or watt hours, but it's worth reminding you that a battery's actual voltage is slightly different and varies based on its remaining capacity. This is important to know because many LiFePO4 batteries have a maximum recommended charge rate of 50% of battery capacity in amp hours. So a 48v 100 ah battery contains 4800 wH in comparison to merely 1200 wH for the 12v model. Copyright 2022 Portable Mentor. Here is the full battery amps hours chart: Example: Lets say you have a 100 Ah battery running on 12V. The two devices have a combined power draw of 200W. No need to visit the site unless you are just curious. Let's say your phone has a 3.7V 3000mAh battery. This provides electrical energy, which can perform work, like drying your hair when you use a hairdryer. In the realm of electricity, energy results from the movement of electrically charged particles, like electrons, for instance. If you can use the solar panels to continuously supply 1.5 kW of electricity to a 300W heater, it will easily run for as you as youre capable to supply that power. If youre new to the game, its normal to feel overwhelmed when figuring out how many watt-hours your battery bank has/needs. Theoretically, this battery could run the devices for 1560Wh / 200W = 7.8 hours if the discharge rate of the battery would be 100%. That's some serious power! In short,current = flow of electrons. The SI unit of energy is Joule (J). But rest assured, weve provided all the necessary tools to encourage you to convert between these two units yourself. 5. To find out, you'd do the following calculation: Turns out his generator's battery has a capacity of around 145Ah. To calculate how many watts is 12 volts, you would need the value of amps, and multiplying the amps by 12 will give you watts (Watts = Amps*12) For example 12v 33Ah how many watts? = 4.5 x CFM x h (std. How long could one expect the battery to last? Thats a standard 12V battery voltage. For the watt-hour to amp-hour conversion, you also need voltage (V). Hope this helps. Converting Ah to Wh (Amp-hours to Watt-hours) is much easier than it may seem. Lets calculate the energy capacity of each battery (A, B and C): Now we can compare these batteries appropriately. And when we do, we see how wrong we were: That's right, Battery A actually has a greater capacity in watt hours than Battery B. While both units (Ah and Wh) are used to express battery capacity, they are not the same. During his career, he supervised more than 150 projects on clean energy. Available wattage hours is calculated as volts x amp hours. Example. is my capacity doubled Convert Amp hour to Watt hour (Ah to Wh) Insert the Amp hours (Ah) and voltage (V) below and click on Calculate to obtain Watt hours (Wh). Hello Jim, heres how you can figure this out: The 300 Ah battery contains 3,840 Wh when fully charged. I'm an experienced Sales Consultant with a demonstrated history of working in the renewables and environment industry. So you will be able to run these two devices for 3.9 hours (about 4 hours). American Bass 12V 35 Amp Hours 900 Watt AGM Battery STEALTH 350. The higher the rating is the longer the . 1 300W panel should do the job as well. Lets check the equations for energy and power: Energy (Wh) = power (W) x time (h) and Power (W) = current (A) x voltage (V). Save my name, email, and website in this browser for the next time I comment. Now you know how to convert watt-hours to amp-hours, and vice versa. I have a backup power device with a capacity of 2016Wh 50.4v, if I plug a load of 6 Amps at 120v, for how long will it last? For example, say you want to run a 250 watt 110VAC light bulb from an inverter for 5 hours. To calculate its watt hours, you multiple its amp hours by its voltage: 50Ah 12V = 600Wh. But these batteries have different voltages, so only comparing their amp hours is like comparing apples to oranges. The Ah to Wh conversion calculator and chart provided in this article can be beneficial tools for quickly figuring out watt-hours from amp hours or vice versa. However, most batteries have their capacity expressed in amp-hours. So a 12v car battery is equal to 720 watts, you can calculate the value by yourself with the formula which I have mentioned above or by using a calculator, How many watt-hours in a car battery 12v 100Ah car battery has 1200 watt-hours (Wh), To calculate how many watts is 12 volts, you would need the value of amps, and multiplying the amps by 12 will give you watts (Watts = Amps*12), For example 12v 33Ah how many watts? The most often cited disadvantage of higher volt systems is the cost of the overall system (as . The unit of voltage is volt (V). For example, if you have a 2 Ah battery rated at 5 Volts that lasts for 2 hours, the wattage is 2Ah * 5V / 2h = 5W. Copyright 2022 Footprint Hero LLC. Since most appliances are rated according to how much power they consume, once you account for all your appliances and the amount of time youll use each one, youll reach a total in watt-hours. Hello Stan, the calculations are the theoretical estimates, yes. Your at 12v 165ah. Some brands have started reporting their batteries' capacities in watt hours -- particularly for solar generators (aka portable power stations). Practically that means you will be able to run a 30Wh motor for about 30 hours. Population: 133,419 People Therefore, weve confirmed that a watt-hour is a unit of energy. Running a embroidery mechine 300 watt how long can I run this mechine with this battery off an inverter. P (W) = I (A) V (V). Let's say you're interested in buying a new phone with a 12.4 watt hour battery. AC three phase amps to watts . To calculate your battery's watt hours, you'd multiply 100Ah 12V. A 7-cell lithium battery at 25.2 volts and 15 Amps of capacity holds (25.2 x 15) 378 watt-hours of power. The power P in watts (W) is equal to the current I in amps (A), times the voltage V in volts (V):. No. Wednesday: 8:30 AM - 4:00 PM. AC single phase amps to watts calculation. Skip to main content. 4 x165= 640Ah. To calculate your battery's watt hours, you'd multiply its amp hours by its voltage: In this example, your battery has a capacity of 600 watt hours. (CFM Calculation + Charts), 3-Phase Power Calculator + Formula (kW To Amps, Amps To kW), Gas m3 To kWh Calculator: Gas Cubic Meter To kWh Conversion + Chart, Watt Hours To Amp Hours Conversion (Wh To Ah): Calculator + Chart, m3/h To CFM Calculator: Convert CMH To CFM (With 1-3000 m3/h Chart), 8 Best Infrared Heaters For Indoors, Patios, Garages (With ECO Thermostats), AGM Battery Voltage Charts: 12V, 24V Deep Cycle Battery Voltage, Lead-Acid Battery Voltage Chart For 6V, 12V, 24V, 48V Batteries, Natural Gas MMSCFD To MMBTU/Day Calculator + Chart, Natural Gas CCF To Therms Calculator + Chart (1 CCF = 1.037 Therms), Lithium LiFePO4 Battery Voltage Charts For 12V, 24V, 48V, 3.2V, Natural Gas MMBTU To m3 And m3 To MMBTU Calculator + Chart, Convert FPM To CFM: Air Velocity To Air Flow Calculator + Chart, How Long Will A 200Ah Battery Last? But, it can be helpful to convert watt hours to amp hours when designing a solar electrical system. In 12 volts, amp-hours are equal to watt-hours divided by 12 volts, or 1470 divided by 12 equals 122.5 amp-hours. To calculate your battery's watt hours, you'd multiply 100Ah 12V. Footprint Hero is where Im sharing what I learn as well as the (many) mistakes Im making along the way. That would theoretically mean it can run a 30 Wh trolling motor for 60 hours. How Many Watts Can A Charge Controller Handle? 2 12v 10ah batteries in series make for 24v 10ah. Related post: How Long To Charge 12v Battery With Solar panel, usually, 12v car batteries have a capacity of 60Ah so lets assume that you have a 12v 60Ah car battery. As you probably suspected, no, these assumptions are not correct. To convert amp hours to watt hours, you just multiply amp hours by volts. To do so, you'd divide watt hours by volts: In this example, your battery has a 166.67Ah capacity. DC watts to amps calculation. I = 200W / 40V = 5A. To further demonstrate how amp hours differ from watt hours, you would also be able to achieve the same 2400 Wh with a 24V . If you want to use it for 12 hours per day, it will require at most 1 kWh. Hello Jim, here's how you can figure this out: The 300 Ah battery contains 3,840 Wh when fully charged. Maximum Charging Current & Voltage For 12v Battery, How Long To Charge 12v Battery With Solar panel, Solar Panel Amps Calculator (Watts to Amps), Renogy 200w Solar Suitcase: (My favorite of all time!). 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