How it works:
All you must do is enter the total power requirements of all your electrical devices in watts (W) and the corresponding system voltage in volts (V). In addition, you need to specify the run time you require before the batteries need recharging (e.g. 6 hours).
The individual steps for this:
Step 1:
Determine the power demand of the electrical devices. The energy requirements should be written on each device. It is usually given in watts (W). To do this, you add up all the values to a total number.
Step 2:
Now determine the voltage at which the electrical devices or your power system is operated. If it is not described directly on the device, you will find it in the manual or the corresponding data sheet. The specification is in volts. Often 6, 12, or 24 volts are standard.
Step 3:
Now consider how long the devices should be able to go without recharging (maximum).
Step 4:
Enter the values above into our calculator. The result is given in Ah (amp-hours) and corresponds to the recommended capacity of the battery or its charge amount. The recommended capacity (in Ah) considers a buffer of 70% so that the depth of discharge of the battery is not too low, as regular deep discharges would massively limit the life of the battery. Based on the values now available, you can select a suitable battery.
** Please note there are limitations to this calculation as unknown draws and parasitic loads can be found in systems and will not be accounted for in this formula. Therefore, we do not guarantee that this calculation is 100% accurate. Please consult a professional if you are unsure about what is necessary for your energy requirements.