The discharge factor is defined as** a fraction of the overall battery capacity** that, when expressed as a number, represents the amount of time in hours that a battery can be discharged at a constant current. For example, C/5 represents a discharge factor of 5 hours. concerning emission rate.

**What is Charge Factor? ****What is Self-Discharge?**

A charge factor is a number that indicates **how many hours must pass** after a given amount of electricity has been discharged for the battery to regain its initial condition of charge.

Self-discharge is the rate at which a **battery loses its stored energy** when the electrodes are not connected.

**What is Battery State of Charge (BSOC)?**

The battery level of charge is a crucial component of a battery used in a PV system (BSOC). The** amount of energy or battery capacity that has been used as opposed** to the amount still left in the battery is known as the BSOC.

The battery’s current energy storage to its nominal maximum capacity is expressed as the battery state of charge (BSOC or SOC). For instance, a battery with a 500 Ah capacity and 80% SOC has 400 Ah of energy saved in it. Measuring the battery voltage and contrasting it with the voltage of a completely charged battery is a typical method for determining the BSOC. This measurement, however, only gives a rough idea of the battery’s state of charge because the battery voltage relies on temperature as well as the battery’s state of charge.

**What is the Charging and Discharging Rates?**

A common method of describing battery capacity is to give it as a function of how long it takes the battery to completely discharge (note that in practice the battery often cannot be fully discharged). When describing battery capacity in this manner, **the notation is expressed as Cx**, where x is the amount of time in hours needed to discharge the battery.

When the battery is drained in 10 hours, C10 = Z (also written as C10 = xxx) indicates that the battery’s capacity is Z. The battery capacity increases to Y when the discharging rate is cut in half (and the time needed to discharge the battery is increased to 20 hours). By dividing the capacity by the time required to empty the battery in 10 hours, one can calculate the discharge rate. C/10 is the charge percentage as a result. You can also write this as 0.1C. As a result, a specification of C20/10, also written as 0.1C20, is the charge rate achieved when the battery capacity, which is calculated when the battery is discharged in 20 hours, is discharged in 10 hours. When higher or lower charging rates are used for brief intervals, comparatively complex notations may result.

The quantity of charge added to the battery per unit of time (coulombs/sec, the unit of Amps) is used to calculate the charging rate in Amps.

**Recommended: **What is Deep Discharge?