Xantrex Truecharge 20+ Amp, Руководство пользователя

Страница: 36 / 78

Operation
3–2
About Charging
This section provides information about
• calculating the charging time
• effect of battery temperature on charging
• indicator light activity during the charging process
• using a generator to run Tru
Charging Time
Formula Charging time will depend on the capacity of your battery and on how
deeply it is discharged.The following equation calculates an approximate
charging time:
where:
Example A Group 27 size battery rated at 82 amp-hours is 40% discharged, that is,
it has a DOD = 40. Charging time with a Truecharge 20+ unit is
calculated as follows:
Charging time = CAP x DOD
CC x 80%
Charging Time: Battery recharge time in hours
CAP: Battery capacity in amp-hours
DOD: Battery depth of discharge in per cent. A fully
discharged battery has 100% DOD
CC: Charge current, the rated current output of the
charger in amperes
80%: Typical charging efficiency for lead-acid batteries
Charging time = 82 Ah x 40% = 2 hours
20 A x 80%