Section 8 --- Electrical Systems - House
Cayman 2005
278
House Batteries
House batteries are designed for use with 12 Volt DC operated lights, appliances and inverters.
These are available in many sizes and types.
Types of House Batteries:
• Liquid Lead Acid (LLA)
• Absorbed Glass Mat (AGM)
• Gel Cell
NOTE:
Tap water contains minerals which can alter battery chemistry and ruin the battery.
Use only distilled water when refilling the LLA battery.
CAUTION:
Many types of petroleum based products or battery by-products can damage the
paint finish. Do not allow these types of chemicals to get on the paint finish. If the
chemicals splatter on to the painted surfaces, immediately rinse the surface using plen-
ty of water and a mild automotive detergent.
Battery Maintenance
Liquid Lead Acid (LLA) battery cells should be checked at
least once a month. The level should be above the top of the
plates, but not overfull. The electrolyte level should be approxi-
mately 3/8” below the well to allow room for expansion while the
battery is being charged. Over-filling the battery will allow the
electrolyte solution to boil or gas out of the battery cap.
Remember to use only distilled water to refill the battery. A battery
with a low electrolyte level will rapidly boil out the water once the
plates have been exposed to air.
Periodically check the batteries for corrosion and cracks.
Replace vent plugs that are cracked or missing. Keep the top of the
batteries clean. The accumulation of electrolyte and dirt may per-
mit small amounts of current to flow between the terminals, which
can drain the battery.
020034C
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