Battery C20 Calculation

For C20 parameter is normally used the Amp Hours (Ah) that are declared on the battery. For example, 100Ah battery should have C20 set to 100.

When batteries are connected in the battery bank than the C20 is calculated:

1. if batteries are connected in parallel then the common Ah = Ah-first battery + Ah-second battery + ... Example for two 12V 100Ah batteries in parallel C20 = 100 + 100 = 200Ah, common voltage is 12V.

2. if batteries are connected in serial then the C20 is the same as for one in serial connection, Example for two 12V 100Ah batteries connected in serial then the C20 = 100Ah and the common voltage is 24V.

The battery manufacturers normally don't specify the C10 and C5 parameters. These parameters should not be set in battery properties.