Caravan 12 Volt Systems 12 volt systems are powered from an onboard battery, and provide power for the water pump, as well as strip lighting and a toilet pump. 12 volt systems allow you to keep your lights on and still use your water pump if there is a loss of mains power – as long as your battery is charged.

How does a caravan battery work?

Simply it operates if it detects the car engine is running by sensing a voltage on Pin 10 (13 pin connection) If there isnt a voltage present, the leisure battery is connected to the caravans systems and the charging circuit from the car is disconnected, however as soon as it detects a voltage on Pin 10, then it

How does a 12 volt work?

A twelve-volt battery has six single cells in series producing a fully charged output voltage of 12.6 volts. Each cell is capable of storing 2.1 volts. In order for lead acid cell to produce a voltage, it must first receive a (forming) charge voltage of at least 2.1-volts/cell from a charger.

Do I need a leisure battery for my caravan?

You will need a leisure battery in order for most of the 12V appliances in your caravan or motorhome to function but, even if it wasnt essential, there is a very good reason for choosing to use a leisure battery rather than powering the devices directly from a mains charger or similar.

Can I connect ground to negative?

The negative terminal of the battery is connected to your car body, so you can connect your sirens negative terminal directly to your closest ground point (car metal body). Theres no reason to have multiple cables on your batterys terminal. Cable harness will be more organised.