Installation Guide
18
WINTER STORAGE
Prior to placing batteries into winter storage make certain the electrolyte level
is approximately 13 mm (1/2”) above the top of the separators. The electrolyte
level in a very cold battery will be lower than normal, so let batteries warm to
a normal ambient temperature before judging electrolyte levels. If the batteries
become discharged, the electrolyte may freeze when stored below -7°C (20°F).
EQUALIZATION
Individual cell readings will vary slightly in specific gravity after a charging
cycle. Equalization or a “controlled overcharge” is required to bring each
battery plate to a fully charged condition. This will reduce stratification and
build-up of sulfation on the plates; two circumstances that shorten battery life.
Corrective equalization of the battery bank is recommended every 60 to 180
days, depending on the usage of the individual system. To equalize the battery
bank, charge the batteries until the voltage elevates to the “Equalization”
voltage as shown in Table 2 (a) & 2 (b) Flooded Charging Parameters and
maintain for several hours. Equalization time will vary, depending on the level
of sulfation and balance of charge. When specific gravity remains constant
for 45-60 minutes this generally indicates completion. Monitor electrolyte
levels and add distilled water as necessary. If the cells require watering, it is
recommended this be done during the equalization process to allow sufficient
mixing with the existing electrolyte.
One of the most commonly asked questions is “When is it time to equalize
my battery bank?“ The answer will depend on several factors, including depth
of discharge, cycle frequency, operating temperature, charging voltage and
current. Regular monitoring of specific gravity and voltage should indicate
when this is necessary. An equalization should be completed when the specific
gravity of individual cells within the battery bank are varied by more than
.025 -.030 (Ex. 1.265, 1.265, 1.235...). If specific gravity readings are balanced,
but consistently lower than recommended, it may be necessary to adjust Bulk/
Absorption voltages and/or Absorption time to increase charge time.
Specic Gravity Freezing Temperature
1.280 -69ºC (-92ºF)
1.265 -57.4ºC (-72.3ºF)
1.250 -52.2ºC (-62ºF)
1.200 -26.7ºC (-16ºF)
1.150 -15ºC (5ºF)
1.100 -7ºC (19ºF)