9.4 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, if applicable, the Q-monitor.
Incorrect battery handling can cause serious damage to your boat or risk of 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.
-
Never switch off the main switch while the engine is running as this could damage the charger.
-
Recharge the batteries only using the boat’s engine or a battery charger appropriate for the battery type. Recharging a battery with excessive current may cause the battery to explode.
-
Make sure that the battery does not leak and spill battery acid into the boat when recharging.
The batteries need to be disconnected when:
-
You want to deactivate the automatic bilge pump.
-
In connection with maintenance and winter lay-up.
-
When replacing batteries.
When connecting or disconnecting batteries, make sure no metal tools make contact with the aluminium parts of the boat or both terminals of the battery simultaneously.
Requirements for new batteries:
-
The engine battery should be capable of producing large currents.
-
The service battery, if equipped, should be a deep-cycle battery with high-energy density, such as an AGM, gel, or lithium-ion battery.
-
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.