Step7: Sizing Charge controller
To calculate the size of the charge controller required, we first need to determine the solar array's maximum current output and then ensure the charge controller can handle that current at the system's voltage. Step 1: Calculate Solar Array's Maximum Current Output The formula to calculate the current (in Amps) is: Current = Total Solar Array Power/System Voltage Given: - Total Solar Array Power = 6.48 kW = 6480 W (Calculated Solar Array Value) - System Voltage = 48V (Battery Bank Voltage) Current = 6480W/48V = 135A Step 2: Determine Charge Controller Size The charge controller must be able to handle at least 135A. However, it's good practice to add a safety margin (about 25%) to accommodate for potential increases in current due to bright sunlight conditions or other factors. Required Controller Current Capacity = 135A x 1.25 = 168.75A Since charge controllers are not typically available in this exact capacity, you would choose the next higher available si