3A(3000mAh)*3.7V=11.1W Don’t worry, let’s first break down what each of these terms mean: An inverter battery’s capacity is calculated in ‘AH’, which means Ampere Hour. All rights reserved 2015-2018. In the ideal/theoretical case, the time would be Time(H) = Capacity(Ah)/Current(A). with a current charge of 100 A during 1 h than with a current charge of 10 A during 10 h. How to calculate output current, power and energy of a battery according to C-rate? When tested, your multi-meter should display a current of around 12 amps, but if this is not the case take note of the displayed current. In other words, you can have “any time” as long as when you multiply it by the current, you get 10Ah (the battery capacity). Mail : sales@dnkpower.com They are on the shelf and therefore has short lead time and small MOQ. Basic equation: Watts = Amps * Volts Generally, This simply means how many amperes a battery can deliver in an hour. LiFePO4 battery Connect a resistor of about 1 ohm and 200 watts across the battery terminals. Basic equation: Volts = Watts/Amps #1200mAh is the same as 1.2Ah. Mob:+86 189 4877 2006 To determine the AH rating of a 12-volt battery not already rated in amp-hours, begin by making sure the battery is fully charged. The more capacity your battery has, the more load it will be able to carry for long hours. So, it comes down to the number of appliances you want to power with your inverter. Mark's RV: The 12volt Side of Life (Part 1). The actual capacity will be very complex, but luckily we have a simple and fast calculate formula. For NiFe, for example, using Solar this could typically be <65% of the Ah rating for 4~6 hours. If you wish to determine the AH rating of a battery not originally rated in amp-hours, you can do so at home with a multi-meter and a few hours of monitoring time. Convert Volts to Amps et’s see an actual case, 10 Ah battery delivering 1A, would last 10 hours. Basic equation: Amps = Watts/Volts All About Lead Acid Batteries: What are Amp Hours? In reality that’s: 1800mAh ÷ 2702.7 mA*0.9 = 0.599h = 36 min, Notes: 1A=1000mA mA is current, mAh is Capacity, Or you can use 3.7V*1.8Ah(1800mAh)*0.9/10W=0.599h=36min, Another example: 12V 60Ah battery pack to power 220V 100W light    Er = rated energy stored in Ah (rated capacity of the battery given by the manufacturer) For example, if the same 20 Ah battery is discharged in one hour, it can only deliver 12.4 A for one hour, which amounts to 12.4 Ah. for lithium battery it would be 100-265 Wh/kg or 250-670 Wh/L. They have never seen Seinfeld and are deathly scared of wasps. Charge or discharge current I : A Suppose, I have a 60A battery. Amp-Hours and Watts Defined An amp-hour (Ah) tells you the amount of current a battery can provide over a certain amount of time, and a rating (usually in amp-hours or milliamp-hours) is used to give you an idea of how long a battery can provide a given amount of … Cr = 1/t For example, if your battery is 150AH and you put 150A of load on it, it would last for around 1 hour. A 0.5C or (C/2) charge loads a battery that is rated at, say, 1000 Ah at 500 A so it takes two hours to charge the battery at the rating capacity of 1000 Ah; Before completing the calculation, you need to understand what the terms mean and find out the voltage of the battery. About us Cr = I / Er 500W/5A=100V, Converting Volts to Watts We, therefore, will need to times 0.8-0.9 for the calculation: What if you know Watts only, you will notice that every device use watt to determine it’s main specifications. How long will a 2000mAh battery last for a 100mA current cell phone Put in your numbers in the calculator below and get these calculations done in seconds. However, some inverters have 24V of input voltage too. For example   2amp * 100 volts = 200 watts If the capacity is given in amp-hours and current in amps, time will be in hours (charging or discharging). Example: Battery AH X Battery Volt ÷ Applied load. If this is the case, the battery is ready to test. Rechargeable 18650 Battery Backup Time = Battery AH x 12V x N x Efficiency of Battery / Load in Watts.

With 90% Power efficiency for Li-ion/LiPo batteries. Take note of the exact number of hours, and you'll be able to calculate the battery's AH rating. In theory that’s: 1800mAh ÷ 2702.7 mA = 0.666 h = 40 min We here have 2 ways for you to get the battery capaicty. If you want, multiply your number by 1000 to get milliamp-hours. 60% DOD =0.60 C rating recommended). Video of the Day Volume 0% An ideal 150 Ah hour battery can deliver 150 A of current for 1 hour, or 75 A for 2 hours and so on. The simplest formula is : I = Cr * Er Battery discharge time depending on load.

If you are planning to buy a new inverter battery, you surely must have reached a point where you got the need to calculate the capacity of the battery you need. AMAYSIM Mobile Phone Plans offer Unlimited Mobile and National calls from just $10 month, +you get $10 Credit for the first month, with No locked in contracts and Free number transfer! Meet the team t = time, duration of charge or discharge (runtime) in hours

This simply means, how long do you want the battery to last when there is a power shutdown. The capacity of a battery or accumulator is the amount of energy stored according to specific temperature, charge and discharge current value and time of charge or discharge. wattage X 20% then divde by lowest volage of battery say 12v. Ampere Hour To Kilowatt Hour Electrical Unit Conversion: Battery Bank Charge/Discharge Time: (max. In India, almost all the inverter batteries have 12V of the input voltage. Some customers asks for 12v battery run time calculator, Let’s say a 12V 100Ah solar lithium battery to be used for a 12V 30A device With your multi-meter, measure the voltage across the battery's two terminals. the battery run time calculation would be if size are given or can be checked by a ruler, we can then get the battery capacity.The size of Lithium polymer battery has a great impact on its capacity, that’s the thickness, width, and length of a battery. I hope that you learned something from this tutorial.

For example 3amps *5 volts = 15 watts The material and Production technology will have an effect on the lipo cell capacity. Input these numbers into their respective fields of the battery amp hour calculator. So how to calculate how long a battery will last? It is that simple. Or if delivering 10A, it would last for only 1 hour, or if delivering 5A, it would last only for 2 hours. You can then use a measurement of the battery's current to calculate the AH rating. Meet the Team 100Ah/30A=3.3 Hours, Here we come some key important take aways. Therefore, in this case a battery with 96.25Ah of capacity should serve good.

Hence, you are here. This simply means the voltage of the battery. Add Tip Ask Question Comment Download. The Electricity Retailers dirty secrets they don't want people to know: How to make the Electricity Retailers Redundant! The battery capacity is equal to 2.2 Ah. For example, batteries rated in ampere-hours (AH, also called amp hours) are designed to deliver low currents for an extended period. An ideal 150 Ah hour battery can deliver 150 A of current for 1 hour, or 75 A for 2 hours and so on. The Following Equations can be used to convert between amps, volts, and watts. The voltage should be decreasing by about 0.1 volts every two hours.

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