9.3 Maintaining batteries
Proper battery maintenance is important for a safe use of your boat. Service the batteries regularly and follow their charge status in order to prevent them from discharging. You can follow the batteries’ state of charge from the tachometer or Q-monitor, if applicable.
Risk of injury.
Incorrect battery handling can cause serious damage to your boat or injury to passengers.
Consult a qualified electrician if necessary.
The boat's batteries charge automatically when the engine is on. You can also recharge batteries externally.
Risk of material damage.
Switching off the main switch while the engine is running can damage the charger. Recharging a battery with excessive current may cause the battery to explode.
Never switch off the main switch while the engine is running. Recharge the batteries only using the boat's engine or charger appropriate for the battery type.
Ensure that the battery does not leak and spill battery acid into the boat when recharging.
Risk of material damage.
When connecting or disconnecting batteries, make sure that no metal tools make contact with the aluminium parts of the boat or both terminals of the battery simultaneously.
The batteries need to be disconnected when:
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You want to deactivate the automatic bilge pump.
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In connection with maintenance and winter lay-up.
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When replacing batteries.
Requirements for new batteries:
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The engine battery should be capable of producing large currents.
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The service battery, if equipped, should be a deep-cycle battery with high-energy density, such as an AGM, gel, or lithium-ion battery.
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If you are using a special type of battery, take note of any specific requirements in terms of connections, charge regulators, and protection from water.