SamplexPower Pure Sine Wave PST-600-12 Manuel Du Propriétaire page 19

SECTION 7 |
battery and 42V for 48V battery.
Capacity "C" in Ah = Reserve Capacity in RC minutes x 0.6
7.5 TYPICAL BATTERY SIZES
The Table 7.1 below shows details of some popular battery sizes:
TABLE 7.1: POPULAR BATTERY SIZES
BCI* Group
7.6 SPECIFYING CHARGING / DISCHARGING CURRENTS: C-RATE
stored energy is related to the amount of the active materials pasted on the battery
plates, the surface area of the plates and the amount of electrolyte covering the plates.
the battery and is designated by the symbol "C".
The time in Hours over which the battery is discharged to the "End Point Voltage" for
as the "C-Rate". If the battery delivers a very high discharge current, the battery will be
discharged to the "End Point Voltage" in a shorter period of time. On the other hand,
if the battery delivers a lower discharge current, the battery will be discharged to the
"End Point Voltage" after a longer period of time. Mathematically:
EQUATION 1: Discharge current "C-Rate" = Capacity "C" in Ah ÷ Discharge Time "T"
TABLE 7.2: DISCHARGE CURRENT RATES - "C-RATES"
Hours of discharge time "T" till
the "End Point Voltage"
1 Hrs.
General Information on Lead Acid
Batteries
Battery Voltage, V
"C-Rate" Discharge Current in Amps =
Capacity "C" in Ah
12
12
12
6
÷
Discharge Time
"T" in Hrs.
2C
1C
SAMLEX AMERICA INC. | 19
Battery Capacity, Ah
160
220
Example of C-Rate
Discharge Currents
for 100 Ah battery
200A
100A
20A