The rating of the battery reduces by approximately 62% if it is discharged in 1 hour. In our example we will use a required runtime of 1 hour. Laptop Battery Life Calculator Enter the Watt Hours and Watts to calculate your battery life in hours. The resulted total watts can be used to decide the type of generator or UPS battery you require to meet the shortage of electricity. This calculator is based upon 12V â¦ Select a 2nd battery pack cell count if you want to check your wiring of two different packs. Online electrical energy calculator that allows you to estimate your home or office backup power supply requirements. Certainly, your battery bank can comprise more than one standalone battery. Please provide as much detail as you can with regard to the problem you found. Online calculator. BU-503: How to Calculate Battery Runtime . The Off-Grid Solar Panel System Calculator helps you size the battery bank, watts of solar panels and the solar charge controller you need. When you move the cursor to any point along the line, a popup bubble shows the Runtime Estimate with the load in watts and the runtime in minutes. If the battery was a perfect power source and behaved linearly, charge and discharge times could be calculated according to in-and-out flowing currents, also known as coulombic efficiency.What is put in should be available as output in the same amount; a 1-hour charge at 5A â¦ After estimating daily usage we need to consider which type of battery will work best, as they have unique performance characteristics and are sized differently. New Features: Select and compare runtimes for four models in a single view. The battery size calculator derates the battery linearly based in this characteristic. To use the RC LiPo Battery Power & Configuration Calculator, simply use the drop down boxâs to select your battery pack specifications. A 4S LiPo would therefore supply 14.8V. 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; A 2C charge loads a battery that is rated at, say, 1000 Ah at 2000 A, so it takes theoretically 30 minutes to charge the battery at â¦ Back to Conversion Calculators. Generally, battery life is calculated based on the current rating in milli Ampere per Hour and it is abbreviated as mAh. Actually, watts is the fundamental unit of power and watt-hours is the energy stored. A LiPo battery consists of multipe cells. Fill out the remaining boxâs for the 2nd battery pack and then hit the submit button. 44.4kw (previously calculated) will be divided by the number of batteries we have available, and the result will lead to 1481 watts per battery. 1. Youâll need to know how much power (in Watts) your UPS is delivering. The UPS runtime formula can be used to estimate if the number of devices can be supported for the length of time needed. 3.7 Volts. Ampere is an electrical unit used to measure the current flow towards the load. UPS runtime is a ratio of battery capacity (AH) over â¦ Print this page. For example, say you want to run a 250 watt 110VAC light bulb from an inverter for 5 hours. Example 1: Must calculate the watt-hour capacity of a car battery having a voltage of 12 volts and capacity of 60Ah: View example: Example 2: Must calculate the ampere-hours of a battery to have 100 watt-hour capacity at 7.2 volts: View example: Example 3: Must calculate the voltage of a battery having 80mAh and 288mWh: View example Select the standalone battery voltage, V â âstandaloneâ means a single battery. 2. This article contains online calculators that can work out the discharge times for a specified discharge current using battery capacity, the capacity rating (i.e. 1,000 watts x 10 hours per day = 10 kWh per day Check out our off-grid load evaluation calculator . Watts per each Cell. For example, say you want to run a 250 watt 110VAC light bulb from an inverter for 5 hours. This section of the calculator allows you to figure out how many batteries it would take to give you the runtime necessary in an emergency, at the same time taking into consideration a safe 50% battery discharge rule. These interactive runtime graphs make it easy to see the amount of battery runtime available with or without optional battery packs. JOHANNESBURG Battery Experts, Unit 14, Sunrise Centre, 71 van Riebeeck Avenue, (Entrance 70 â 10th Ave), Edenvale, South Africa [email protected] 087 086 1144 Download the â¦ If you don't know the Watts or Watt-Hours, use the formulas below. 3. For example, if the load requires less than 2,100 Wattsand the runtime is 15 minutes, a valid UPS will be the P30 with one Extended Battery Module (EBM) providing 25 minutes of battery backup (autonomy) runtime at the P30 maximum capacity of 2,100 watts. Welcome to the Trojan Battery Renewable Energy Sizing Calculator. Watt-hours = watts * hours = 250 watts â¦ 20-hour rating, 100-hour rating etc) and Peukert's exponent. 2.) The key is to use the watts you know to calculate the amps at the battery voltage .