DC/AC converters transform DC battery current to 230 volts 50Hz alternative current. There are also Sine wave converters which provide the same wave form.
They are recommended for sensitive equipment (computer, television.) Pseudosine or trapezoidal converters, much cheaper, are reserved for less sensitive equipment (tools, appliances.)


A converter does not yield 100%; it averages 85 to 90%. 15% of electricity is, “consumed,” in the conversion. It is better to use the 12v power supply than the 220v for converting. Attention also, to the current consumption, it may be important. If we take, for example, a micro wave oven with an output of 850watts, it uses 4amps at 230volts, continuously at 12 volts that consumption is 4 x (230/12) = 80 amps (with a 90% yield). For this reason, a converter must be
placed as close to the batteries as possible and connected to them with cables sized according to its power.

Our view

A 12/220V converter on board is a real plus. It permits the use of everyday devices on board without worrying about their power supply. It must though, be used sparingly. For a permanent installation, such as a computer at the chart table for example, seek to use a 12V power supply instead of connecting a converter. In contrast for a device that can be used only occasionally, such as the hand tools or a hair dryer, a converter is fine. Care must be taken to choose a model that can support consumption (wattage) always look to a model over the consumption declared.