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Subject Topic: Leisure Battery Charging
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23/2/2012 at 8:07pm
 Location: Chester Cheshire
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I thought it was recommended to have a 110ah battery for a mover?



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Mike+Judi.


23/2/2012 at 8:15pm
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Quote: Originally posted by mike+judi on 23/2/2012

I thought it was recommended to have a 110ah battery for a mover?




Mover fitters may recommend a 110 aH but probably only so they can sell you a new one. Most if not all the mover manufacturers recommend an 85aH


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23/2/2012 at 9:14pm
 Location: Shropshire North Wales borders
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I think it depends on whether you use EHU - if you go away for a weekend without EHU there might not be enough power left in an 85aph to operate the mover when you get home. Unless it's a long drive and the car has re-charged it.

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Caz
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23/2/2012 at 9:18pm
 Location: Lancashire
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make sure its a quality timer used for the constant daily charging.cheap ones are not safe.

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the only silly question is the one you do not ask.


23/2/2012 at 10:26pm
 Location: barnsley
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We use a 110ah battery in the tent, when at home its connected to a 4 watt solar charger, getting a quick top up from a car charger on low setting before we go off.
It seems to all work ok but please tell me if Im doing anything wrong, as electric is not my field


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24/2/2012 at 12:38pm
 Location: Knebworth Hertfordshire
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Quote: Originally posted by brianjose on 23/2/2012
You might find a 75ah battery a bit on the weak side for a mover!  It is uaually recomended that a minimum of 85ah be used!



I've been using an 85 amp battery quite happily for some years now in conjunction with my motor mover and other 12v appliances. This figure tells you that the battery will run a one amp appliance for either 75 or 85 hours. 110 amp batteries will run one amp for 110 hours - they don't produce any extra power output.

Cheers!

Vic


24/2/2012 at 6:55pm
 Location: Coventry
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Yes but the point is that they will deliver a large load for longer.  Motoor movers use a large load, and the extra capacity is there to make sure yopu have power to your mover every time you need it, not just when the battery has been freshly charged!

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there are 10 types of people in this world, those who understand binary and those who don't.


24/2/2012 at 7:12pm
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The higher the discharge rate  the less capacity the battery will have a 110Ah battery won't deliver 55A for 2 hours that's why you may require the extra capacity.That aside I like Vic have had an 85Ah battery for 7 years without any problem with the mover.

Saxo1



24/2/2012 at 7:22pm
 Location: Lichfield
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Some people find battery size a bit confusing regarding 85ah & 110ah but to make it simple it's like having two bottles of water, one 1.5 litre and one 1 litre. Assuming the water is converted to electrical power and withdrawn via a pump of the same rate, the 1 litre will empty first with the larger still having a remaining half a litre. This is exactly what happens with a battery as the rate of consumption will be identical but if you have a motor mover it doesn't deliver any higher power feed it just means that the power will be the same but for a longer period. That could mean the difference of stopping dead between points A and B especially up hill so the 110ah battery is far better in the application of a motor mover. There is nothing wrong with using an 85ah battery at all, it's just that that energy won't last as long as the bigger battery will.


24/2/2012 at 10:47pm
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A car charger won't do your average normal "wet" leisure battery any harm whatsoever. It may damage gel batteries over time, but I doubt many people have gel batteries in their caravans.

Most of the advice so far is bang-on though.
Caravan chargers don't give out enough to fully charge a battery, not just for the reasons of gassing, but also to protect any sensitive 12v equipment on board.

For this reason your leisure battery will benefit from a proper charge with a smart charger (or a car battery charger) at least once every 2 months.
The only difference between the 2 chargers is than you can leave the smart charger connected indefinitely. Whereas a normal basic car charger needs to be disconnected once the battery is fully charged.

Have a look in Lidl & Aldi, they both recently had smart chargers for around the £13 mark. These are very good (I was dubious at first, but mine has proved to be well worth it's weight in gold, especially as the equivalent Durite would be over £50).

Also, take a look at these 2 sites.....

Laymens guide to batteries
Battery FAQs

Apparently the concrete floor thing is a bit of a myth, especially for small batteries (IE: Under 350amp/hr), so I wouldn't worry about that.

Best of luck though. I'm a recent smart charger convert, & I would highly recommend getting one, if only to make life easier.

-------------
Matt.


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25/2/2012 at 8:38am
 Location: Dewsbury West Yorks
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85 amp has been fine for us with the motor mover never had no problems, we are away quite alot and connected to EHU which seems to charge the battery fine! we did have a 110 which cam with the van an it was so heavy an obviously goosed as would not charge, the 85amp that we have now does not weigh as much 


25/2/2012 at 10:50am
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The problem with a car charger is that the cheap ones don't give enough Amps in the initial stage to mix the chemicals to get the process started properly.it is reccommended that the first stage of  charging should be at between 12% and 25% of the batteries  capacity reducing to 2%/4% when the battery is 80% charged,A lot of the cheap car chargers can only produce 4 to 8 amps.

Saxo1



25/2/2012 at 10:51am
 Location: Blyth Northumberland
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Is  the battery weight part of the unladen weight or part of the additional payload.

My caravan unladen 990kg payload recommended 210kg total gross 1300kg

Fred.



25/2/2012 at 11:06am
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Under the latest EU rules the battery isn't included in the MIRO (unladen weight) it is classed as personal effects,it doesn't make any difference as long as your total weight doesn't exceed the MTPLM (max weight including personal equipment),but you have to factor it in when calculating your payload.

Saxo1



25/2/2012 at 11:14am
 Location: Blyth Northumberland
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Thank you. I weigh everything but did not include the battery. I only go near the 210kg when family come with me and want extra seats, baby beds, pushchairs etc.

Fred.



25/2/2012 at 11:19am
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depends on age of van.modern caravans have it included older ones did not.

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the only silly question is the one you do not ask.



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