HI... In need of a liitle bit of advice from you guys... just purchased in the process of buying a Bailey Ranger from my brother... he's throwing the battery in with the sale... It is a 75amp battery... in my previous Van I had a 110... I won't be running a motor mover... will this make a difference to how the Van runs.. Or will the 75 be sufficient..
It depend how long you stay on site without ehu. If you always use ehu then battery will be ok. If you don't have a mover & always use ehu, you don't actually need a battery although some caravan 12v systems won't work without battery even on ehu.
The amps are measured in 'AH' which is identified as Amp Hours. That means that a 110 ah. battery has 110 hours of 12 volt power and a 75 ah. battery has 75 hours of 12 volt power but it's not recommended to fully discharge the battery otherwise it will be rendered useless so realistically you need to work on about half that amount which for a 110 ah. battery would be around 55 hours.
Quote: Originally posted by tango55 on 06/10/2014
The amps are measured in 'AH' which is identified as Amp Hours. That means that a 110 ah. battery has 110 hours of 12 volt power and a 75 ah. battery has 75 hours of 12 volt power but it's not recommended to fully discharge the battery otherwise it will be rendered useless so realistically you need to work on about half that amount which for a 110 ah. battery would be around 55 hours.
I little confusion crept in there:
Amp hour, Ah, is a capacity, the multiple of the amps provided and the time that level of amps can be supplied.
So if you drain one amp the 110 Ah battery theoretically cant provide it for 110 hours; but equally if you drain at a current of 10 Amps, then it will last for 11 hours.
As said batteries are only really practical used down to 50%, but even that can be only be achieved with a good quality leisure battery.
I think you will find a charged 12 volt battery will deliver more like 13.8 volt.And to charge it you need at least 1 volt more to trickle.Its amps that count.As said before,eg,50 ah battery powering a 5 amp motor will run for 10 hours.If you have led lighting it will last ages,if you have low voltage incandescent lighting like G4 lamps it will not last anywhere near as long.
If you are only going to be using EHU with very occasional use of 12v then a 75AH battery is fine. If you are going to be going away and staying on non electric sites and expecting to be there more than 3 days then you either need a bigger battery or a spare 75ah battery and the means to charge to other battery.
------------- Bill
For a licence dated 1997 or later you must add together the plated max weight of the caravan and trailer, if the total is 3500 or less you can tow it. You may even tow a caravan with a MAM greater than the cars unladen mass the restriction was removed in 2013
Hi
Thanks to each and everyone of you for taking time out to reply..
Things are much clearer now... and The forum has saved me a few quid..
Much appreciated
Quote: Originally posted by GCMS2012 on 07/10/2014
I thought you could flatten a 'deep cycle' / leisure battery without any ill effects??
Isn't that the bonus over 'normal' 'cold cranking amp' car batteries??
A "proper" deep cycling battery, better copes with a deep discharge than a starter technology battery. However deep discharging always does some damage, the depth, the duration left there and the "quality" of the battery all come into play determining the damage caused. Going below 50% is not wise on a frequent basis with even a quality battery of the right construction. A starter battery,is generally best worked no more than 20% taken, ie leaving it 80% charged.
They all can take a bit of abuse, but will not all respond as well to it.
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Topic: Leisure Battery..
