Exide Technologies Section 92.30 - Manual (Page 11)

Please reference Table A to determine the recommended charging parameters that the batteries should
undergo upon installation prior to commissioning testing. Either Profile A or Profile B may be imple-
mented. Do not exceed the maximum current(s) shown in Section 9.3.
NOTE: Time periods listed in Table A are for temperatures from 21°C (70°F) to 32°C (90°F); for tem-
peratures 13°C (55°F) to 20.5°C (69°F), double the number of hours. For temperatures other than
25°C (77°F) the following formula can be used to determine the recommended charge voltage
per cell
(VPC):
V corrected = V25°C - [(T actual - 25°C) x (.0055 V/°C)] or
V corrected = V77°F - [(T actual - 77°F) x (.003 V/°F)]
Example at 29.4°C (85°F), OCV of 12.70 V, and 24 hr. charge target:
V corrected = 2.35-0.024
= 2.326 VPC
SECTION 9 - OPERATION
9.0 FLOAT CHARGE
In this type of operation, the battery is connected in parallel with a constant voltage charger and the
critical load circuits. The charger should be capable of maintaining the required constant voltage at
the battery terminals and also supply the normal load where applicable. This sustains the battery in a
fully charged condition and also makes it available to assume the emergency power requirements in
the event of an AC power interruption or charger failure.
9.1 FLOAT VOLTAGES
Following is the float voltage range recommended for the MARATHON/SPRINTER/SUNLYTE Battery
System. Select the “volts per cell” (VPC) value within the range listed that will result in the battery
series string having an average volts per cell equal to that value.
RECOMMENDED FLOAT VOLTAGE AT 77°F (25°C):
2.25 VPC to 2.30 VPC for Marathon & Sprinter
2.25 VPC to 2.35 VPC for SUNlyte
8
TABLE A
12V Nominal Monobloc
OCV Profile A Profile B
> 12.80 V 12 hrs. at float voltage **********
12.60 V - 12.80 V 24 hrs at 14.10 V or 12 hrs. at 14.40 V 72 hrs at float voltage
12.30 V - 12.60 V 24 hrs at 14.40 V 168 hrs at float voltage
12.10 V - 12.30 V 72 Hrs at 14.40 V **********
6V Nominal Monobloc
OCV Profile A Profile B
> 6.4 V 12 hrs. at float voltage ***********
6.30 V - 6.40 V 24 hrs at 7.05 V or 12 hrs. at 7.20 V 72 hrs at float voltage
6.10 V - 6.30 V 24 hrs at 7.20 V 168 hrs at float voltage
6.03 V - 6.10 V 72 Hrs at 7.20 V ***********