12 Volt electrical system

WARNING!
Risk of personal injury. Risk of electrical shock.

  • Do not modify the electrical system of the boat, or the electrical system drawings. Installation, alterations, and maintenance should be performed by an authorized Candela workshop.
  • Never perform any electrical work while the system is energized.
  • Never modify the propulsion system, battery type or system components.
  • Never alter or modify the rated current amperage of overcurrent protective devices.
  • Never install or replace electrical appliances, or devices with components that exceed the rated current amperage of the circuit.
  • Avoid handling the orange high-voltage cables.

The 12V system supplies and distributes power to the low-voltage components, such as the navigation lights, the electrical automatic bilge pumps and various optional electrical equipment.

The 12V system has two power sources, the 12V battery, and the DC/DC converter, included in the high voltage system. The DC/DC converter generates 12V power from the high-voltage system and charges the 12V battery when needed.

A A-ED BECF

A. 12V battery switch
B. 12V fuse box

C. 12V fuse box
D. 12V battery monitor

E. 12V battery
F. Power management units

12V circuit protection

The boat has electronic fuses in the power management unit and traditional, sacrificial fuses in the fuse boxes under the sunbed.

When an electronic fuse is triggered, the error is displayed in the user interface. A sacrificial fuse requires manual replacement.

A fuse map with circuit identification and fuse amperage ratings is located in the vicinity of the fuse boxes.

NOTICE! Under normal circumstances, a tripped fuse indicates a malfunctioning circuit, which should be investigated.

12V battery switch

The 12V battery switch is located under the sunbed on starboard side, next to the fuse boxes. During transport, or during longer periods without the charging cable connected to the boat, the 12V system must be turned off.

Turn off the 12V system

  1. Turn off the key.
  2. Disconnect the boat charging cable.
  3. Turn off the 12V battery switch.

NOTICE! When the 12V battery switch is off, the automatic bilge pumps will not work.

Preventing 12V battery drain

When the key is turned off, the high-voltage electrical system will monitor the 12V electrical system and charge the 12V battery when needed. This function requires that the high voltage battery has a minimum state of charge of 20%.

If the state of charge drops below 20%, the 12V battery will not charge, causing it to eventually drain.

To avoid draining the 12V battery:

  • Always connect the charging cable when docked and the key is turned off.
  • Make sure to maintain the recommended state of charge of 20-80%.

Recharging the 12V battery

If the boat doesn’t start when the key is turned on, the 12V battery might be drained. Follow the instructions to recharge the battery:

  1. Turn off the 12V battery switch.
  2. Connect the 12V battery charger directly to the 12V battery poles.
  3. Charge the 12V battery for 10-20 minutes.
  4. Turn on the 12V battery switch.
  5. Turn on the key. The boat should start and the high voltage system will charge the 12V battery.
  6. Disconnect the 12V battery charger.

If the boat doesn’t start contact Candela.