The Inverter is the piece of electronics that converts the battery power in to “mains” electricity in the sockets. It is a big blue box in the cupboard behind the coat hooks.  It is sometimes referred to as Bartimaeus Multiplus Inverter.

When the boat is in normal use it is left On most of the time.  It can be switched off to save a bit of power – while  it’s off all the kitchen appliances won’t work.  The same piece of equipment handles shore power for charging the batteries and passing it through to the sockets.

When the boat is going to be left unoccupied, it is a good idea to switch off the sockets of all items that are definitely not needed.  This means that if there is a need to remotely switch the inverter on or off, nothing gets upset.

If the boat is connected to shore power, the batteries can be charged from that source.  The solar panels can keep things fully charged from March to October, and probably also in late February.


The state of the inverter can be modified several different ways:

  • From the touch screen above rear steps:
    • Press and hold the blue AC button on the top line (red is ON, white is OFF)
    • Press the AC/DC icon (top line right hand side)
      • The largest blue box in the diagram is the inverter, press it for a menu.
  • Alternatively use the Remote Console:
    • Connect to boat WiFi and go to:
    • Use Menu option, then press Up to find Bartimaeus Multiplus Inverter Press Right
    • Use Up to find Switch, press Right.


There are four choices, but we only use two:

  • On – usual mode when living aboard.  Also used when shore power is needed to top up batteries.
  • Off – usual mode when unoccupied and solar power is sufficient
  • Inverter Only – I can’t see a use for this.  It allows shore power to be connected but not used, there is a mechanical switch for that too (chooses between bow or stern connectors, or neither).  Perhaps used when shore power is available, but using solar power is preferred.
  • Charger Only – I can’t see a use for this.  It allows shore power to the sockets, but doesn’t let the batteries help if the demand is temporarily too high (oven + kettle perhaps).