This would require approximately 24 × 200Ah 12V lithium batteries in a 48V configuration. Free battery size calculator - calculate the perfect battery capacity for your solar system, inverter, or car. Works with lithium-ion, lead-acid, and AGM batteries. A Solar Panel and Battery Sizing Calculator is an invaluable tool designed to help you determine the optimal size of solar panels and batteries required to meet your energy needs. By inputting specific details about your energy consumption, this calculator provides tailored insights into the solar. . Use our solar panel size calculator to find out what size solar panel you need to charge your battery in desired time. Simply enter the battery specifications, including Ah, volts, and battery type. 5Ah 12V Lithium-ion battery. We recommend a 200Ah commercial size. By inputting your daily or monthly power consumption, desired backup days, battery type, and system voltage, you can. . To figure out how long it takes to charge a solar battery, you start by knowing its capacity in watt-hours (Wh) and the total output of your solar panels in watts (W). Basically, you just divide the battery capacity by the product of your panel's wattage and the number of effective sunlight hours. . If you are using an DC to AC power inverter, meaning your device is rated in AC amps and 110 V, you will need to convert that number into DC watts before entering it in the field. Then you will need to add about 10% due to the inefficiency of the power inverter. To get there, use the following. .