Battery Maintenance - Marquis 690 Owner's Manual

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NOTE: Using the inverter to power AC equipment will eventually discharge the
house batteries. If the batteries' voltage level decreases below 21 volts, the
inverter automatically shuts off. At this point, any AC equipment operating
from the inverter also shuts off. If this happens, charge the batteries as
described earlier in this section.
Before servicing the DC or AC electrical system, place the inverter ON/OFF switch in
the OFF position and turn the inverter master disconnect switch to the OFF position.
Failure to do this could lead to death or serious injury from electrical shock.

Battery Maintenance

The batteries contain electrolyte which is an acid. Wear gloves and protective
eyewear when working on and around the batteries.
When servicing the batteries avoid getting any saltwater in or on the battery.
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While the batteries are relatively maintenance-free, there are a few things
you can do to increase their effectiveness and life.
• Keep your batteries fully charged. Batteries that are kept fully or
near fully charged last longer than batteries stored with a partial
charge. The charge level of the batteries can be monitored using
the voltmeters on the helm instrument panel.
• Inspect the batteries at least once every 30 days.
If you spill electrolyte:
1. Ventilate the area of the spill.
2. Neutralize the acid in the electrolyte by pouring baking soda on the
spill.
3. Remove the neutralized electrolyte using a disposable rag or paper
towel.
Disconnect the batteries before cleaning them.
• Periodically clean the battery terminals and cable connections. Remove
any accumulation of dirt on the top of the battery case. Use a wire brush
to clean the terminals. Coating the terminals with a terminal protecting
product will help reduce corrosion that can form in these areas.
• Check that the battery cables are securely attached to the terminal posts.
Tighten the terminal nuts ¼ turn beyond finger-tight using a wrench.
• Remove the batteries from the boat during periods of extended storage.
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