12v to 240v Inverters - Info

A range of top quality inverters for the caravan, motorhome, leisure or camping uses. Use our range of inverters to run 240 volt applications (i.e. TV, games console, computer, fridge etc.) from a 12 volt battery supply.

Use our range of inverters to run 240 volt applications (i.e. TV, games console, computer, fridge etc.) from a 12 volt battery supply. For more info on 'Ring' battery chargers and other products go to www.ringautomotive.co.uk.

Ring Can Inverter given excellent 4 **** out of 5 rating by 'Practical Motorhome' magazine! See the June 2008 issue for reviews, or go to www.practicalmotorhome.com.

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What Leisure Battery/Inverter Do I Need?
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12 volt to 240 volt inverters

How do I work out the power consumption of my appliances?

The simplest method of working your power comsumption is as follows:

watts divided by volts = current in amps.

Thus on a 12 volt electrical system a 120w pump will take 10amps (i.e. 120 watts/12 volts = 10).

So what power battery do I need?

Based on the above equation if you wanted to run the pump for 4 hours you would need at least a 40Ah battery. However, we would recommend allowing a 20% safety margin (i.e. 20% of 40 = 8), so we would recommend a battery of at least 48Ah.

And what Wattage inverter?

Obviously this depends on the wattage of the appliance you want to run off it, but again we would recommend a safety margin, i.e don't run a 300w appliance off of a 300w inverter, use a larger wattage inverter such as a 400w or 500w. Make sure the inverter is situated in a well ventilated area so that it doesn't overheat and remember that most quality inverters will have in-bulit battery protection, meaning that when the battery voltage falls beyond 10 volts the inverter will automatically cut out. This automatic cut-out system may shorten the theoretical running time the appliance, but the idea is that after using your appliance you will still be able to restart your vehicle.

How long will the inverter run for?

Say, for instance, you plan to use a 300w inverter to run 240 volt appliances it follows that the equation becomes 300watts/12 volts = 25 amps when the inverter is used o its maximum rating. Most quality inverters have an automatic cut-out facility which will operate before the battery gets too low on charge and also to ensure that if the battery is attached to a vehicle the battery has enough charge for engine starting. Although this facility is extremely useful it will also cut down the running time by, say, around 25-30%.

For the full range, prices and to purchase securely on line go to our Inverter page.

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