Sizing Cable & Cable Size Calculator

Getting the right size cable, whether it be for running lights, chargers or larger devices like inverters, inverter chargers or fridges is important both in terms of ensuring it can safely carry the current but even if you know the correct cable for the amps an overlooked factor is the voltage drop across the distance. Both of these factors are important for a proper installation. 

For example, for a 30A 12V battery charger you could use Oceanflex 4mm2 cable as that is rated to 39A but if you were running the cables 2.5m you would lose around 0.71v due to voltage drop meaning your charger won't charge as well affecting it's performance.

We have put together a handy cable sizing calculator to ensure you are getting the right cable for your installation, whatever it is. 

Simply enter the Voltage,