Choosing the right battery capacity for your specific needs involves considering several factors. Here’s a step-by-step guide to help you determine the right battery capacity:


      1. What is Battery Voltage of your Device: Start by identifying the voltage requirements of the device or equipment for which you need a battery. The device should clearly state the voltage of the battery that can be attached. Typical user-changeable battery sizes are 12v, 24v or 48v. 


        1. Check the Manufacturer’s Recommendations: Equipment manufacturers often provide information about the recommended battery capacity for their devices in the user manual.


          1. Calculate Power Consumption: Determine the device’s power consumption in watts. You can find this information in the device’s specifications or user manual. If it’s not provided, you may need to use a power meter or an online search to estimate it.


            1. Estimate Usage Time: Decide how long you want the device to operate on a single battery charge. This will depend on your specific usage patterns and needs. For example, if you want a small inverter to last for 6 hours for your Internet connection,  that’s your usage time goal.



              1. Calculate Battery Capacity (in Ampere-Hours or Watt-Hours): If you multiply the power consumption in watts (from step 3) by the desired usage time (in hours) then you get the battery capacity in watt-hours (Wh). Divide the watt-hours (Wh) by the nominal voltage to calculate the battery capacity in ampere-hours (Ah). Example : 1280Wh / 12.8v = 100Ah.


                1. Select the Appropriate Battery: Now that you have the battery capacity in Wh, you can choose a battery with a capacity that meets or exceeds your calculated value. Battery capacity is typically rated in ampere-hours (Ah) and watt-hours (Wh) for Lithium rechargeable batteries.


                  1. Consider Safety and Margin: It’s a good idea to choose a battery with a slightly higher capacity than your calculated value to account for variations in power consumption, and environmental factors, and to ensure your device doesn’t run out of power prematurely.


                    1. Consider Dept of Drain: Lithium batteries can be drained 100% and our batteries have a warranty based on a minimum number of discharge cycles, but if you want to maximize the lifespan and cycle achievable, then a 50% depth of drain is recommended. Alternatively, 80% is an optimal point in terms of not buying an oversized battery and also ensuring you get a longer lifespan.