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Subject Topic: No Battery? Post Reply Post New Topic
Message posted by xplore44 on 22/11/2018 at 9:28pm
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Has anybody used their caravan without the leisure battery?
How did you get on?
Thinking of removing the battery over winter, but on offchance of using the caravan, wondered if the on site hook up would be enough (don't fancy removing and then refitting the battery for short tine as they are so heavy)
biggest problem could be using cooker (could maybe use a match?)
Would be nice to hear your thoughts

Thanks

Message posted by tango55 on 22/11/2018 at 9:38pm
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I know somebody that onced used their caravan minus a leisure battery. When they arrived on site the 12 volt electric circuit wasn't working and didn't know why. A service engineer was called out and found that a fuse had blown due to the fact that the terminals had made contact and blew the fuse. An expensive mistake that could have been avoided if the terminals were simply connected to a leisure battery.

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Message posted by saxo1 on 22/11/2018 at 10:14pm
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Some won't run the 12V system without a battery some are designed to operate with or without a battery.
My charger has polarity protection and short circuit protection,there is no voltage at the terminals if it isn't connected to a battery,I'm surprised that most don't have the same level of protection,however my van is German.
saxo1

Message posted by DaveMiller on 23/11/2018 at 11:54am
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Read the manual.

Most caravans will operate without a battery which is why one isn't supplied as standard.

Message posted by Colin21 on 23/11/2018 at 1:43pm
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I think it depends on the caravan and what unit it is fitted with. Is it a 12 volt power supply, or is it a battery charger? Both may appear to do the same job, but they are different. If you have a 12 volt power supply you can run without a battery as that is what they are designed to do, but if it's a battery charger you might not be able to. Some, like Saxo's, will not work if there's no battery fitted because they have protection devices built in, and others may not be reliable and can overheat as they need a battery to provide a load on them and stabilise the supply. Personally I wouldn't use my caravan without a battery because I want the back-up if the mains fails. I would think this would be more likely in winter as there would be a heavier drain on the site's supply if a lot of people were using electric heaters.

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Message posted by ericmark on 07/12/2018 at 4:26am
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I was unsure if the power supply design would or would not work without a battery, so I used a very small 7 Ah battery which worked well.

It does not only depend on the power supply, but also what one runs off 12 volt, my old caravan had half 230 volt and half 12 volt lighting, the new one is all 12 volt.

In the old days I used a CB power supply, but although a 3 amp power supply is only 17 and 5 amp 19 but time you hit 20 amp the price is 60 (Amazon prices) so you need to get some info first.
1) How much 12 volt power do you need.
2) What does it say on your existing power supply.
Some times your lucky, you find the model number, do internet hunt and find all details, other times you can't find a thing.

As well as reverse polarity protection you also get switch mode devices which are not smoothed, switch mode means less heat and works as name suggests by switching on and off and adjusting the ratio between on and off time so average is 13.8 volt, some have a large capacitor to smooth the output, other rely on the battery to smooth output.


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