About Charging; Charging Time - Xantrex Truecharge TC20+ Owner's Manual

Operation

About Charging

This section provides information about
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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:
Charging time = CAP x DOD
where:
Charging Time:
CAP:
DOD:
CC:
80%:
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 = 82 Ah x 40% = 2 hours
3–2
calculating the charging time
effect of battery temperature on charging
indicator light activity during the charging process
using a generator to run Truecharge+
CC x 80%
Battery recharge time in hours
Battery capacity in amp-hours
Battery depth of discharge in per cent. A fully
discharged battery has 100% DOD
Charge current, the rated current output of the
charger in amperes
Typical charging efficiency for lead-acid batteries
20 A x 80%