User Manual
18
WINTER STORAGE
Prior to placing Flooded batteries into winter storage, charge to 100% SOC and
make certain the liquid level is approximately 13 mm (1/2”) above the top of the
separators. Electrolyte in a very cold battery will be lower than normal. Allow
the battery to warm to a normal ambient temperature before judging electrolyte
levels. Self-discharge rate will vary by ambient temperature. Apply a refresher
charge as necessary when stored for extended periods.
Example: Electrolyte may freeze if the batteries become discharged
to approximately 50% SOC at -20ºC (-4ºF).
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)
TABLE 4:
Specific Gravity
vs Freezing
CLEANING VENT CAPS:
You might notice a sticky dark gray residue on the inside of the standard 1/4-turn
bayonet, R-Caps or Watermiser vent caps on Flooded battery cells. This buildup
of dirt and dried electrolyte is fairly common and may clog the vent holes, preventing
the release of hydrogen off-gas during charge. Inspect the caps and clean using
a neutralizing baking soda and water solution as necessary.
CLEANING STEPS:
1. Clean the caps by soaking in a solution of water and baking soda (100g per litre) in
a bucket or small bowl. Let the vents sit overnight to neutralize and break down any
electrolyte in the caps.
2. Flush the caps clean by forcing water through the vent holes. Water should drip
freely. A trickle of water should flow from all vent holes, indicating the cap is clear
of debris.
3. Allow the vents to dry completely. Once dried, shake recombination caps to make
sure the condensing beads on the inside of the cap rattle slightly. If you do not hear
the beads, let the cap dry for an additional 12 hours or repeat the process above.