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Subject Topic: Another Battery question - sorry
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Message posted by JTQU on 13/2/2014 at 10:20am
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Before any readers get mislead by the Sterling Power article in Brian’s link can I suggest they quickly drop to the bottom of it and read its “Conclusion”.

 

Here you will see the whole emphasis is on what is “best” for “fast charging”. 

 

This is because the quoted article is completely out of context, with our battery requirements; it is targeted at leisure marine use, not caravan habitation power support.

 

In a caravan you don’t require the battery to cold start a large propulsion battery and then grab the opportunity to recharge it as quickly as possible from the brief running period of the engine.

Our requirement is so totally different, making nonsense of using the article to support caravan habitation battery selection. Certainly not the best article I have seen for our application, if of any use in that context at all.

 

In answer to Brian’s question to me:

No I don’t believe batteries made to nationally recognised Japanese or USA standards are rubbish, nor have I in anyway said or implied so.

If you would like to furnish us the details of exactly which of these national standards and the batteries you are referring to, are compliant with, then we can constructively  look into their suitability for our use.


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Message posted by saxo1 on 13/2/2014 at 10:42am
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Quote"Anybody can paste a misleading label on a battery. Unfortunately many did which is why the EU introducded EN 50342 to protect those purchaser interested enought in knowing"

What's to stop them sticking on a label saying it conforms to EN 50342?
saxo1

Message posted by JTQU on 13/2/2014 at 4:52pm
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Quote: Originally posted by saxo1 on 13/2/2014
What's to stop them sticking on a label saying it conforms to EN 50342?
saxo1



Nothing, other than by doing so they have stepped firmly the wrong side of the law, so I doubt many legitimate resellers would touch the product.
There is however as yet no control over putting labels on things that lead the less savvy buyer to jump to the wrong conclusions.
Eg blazing “110” on the label, or even more cunning write “110Ah” without saying how that 110Ah might be measured. The gullible being ready to assume they have purchased a 110Ah battery with a genuine C20 rating but it could easily be only a C100 or even longer period test, if tested at all. Simply "110" could mean it is a deceptive model number not relating to Ahs at all!
That is exactly why the world has these product standards.
But thankfully we are protected in law from lies, such as putting an EN 50342 C20 label on a non compliant battery. One needs though to be savvy enough to buy legitimately.


Message posted by brianconwy on 13/2/2014 at 9:38pm
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'In a caravan you don’t require the battery to cold start a large propulsion battery and then grab the opportunity to recharge it as quickly as possible from the brief running period of the engine.
Our requirement is so totally different, making nonsense of using the article to support caravan habitation battery selection. Certainly not the best article I have seen for our application, if of any use in that context at all.'


His conclusion was that to fulfill the requirement for 5 - 7 years use a lead acid leisure battery was the best choice. Bear in mind though that the original poster wanted a battery to power a motor mover.

I am not sure what a large propulsion battery is.

Message posted by JTQU on 14/2/2014 at 9:43am
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Whoops yes a typo there; better put as:-

"In a caravan you don’t require the battery to cold start a large propulsion diesel. Then grab the opportunity to recharge that battery as quickly as possible during the brief running period of the engine"

The point being made is that it serves nobody to take a dissertation on battery selection for a totally different and quite specific application and maintain that the advice given there automatically carries over to our application.


Message posted by brianconwy on 14/2/2014 at 5:25pm
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Admittedly the article is aimed at queries about AGM and gel batteries which some people recommend at quite a cost. I don't know what battery is in my van. I took it out of my old van over three years ago when we bought the current van. We bought it from the fitter who fitted the mover on our old van about 7 years ago. It works great so I leave it alone. I still have our original Numax in the garage but I haven't used it for years so it might have decayed through neglect by now.

Perhaps people have trouble with batteries but as I haven't I feel if a battery is bought from a reputable supplier then it shouldn't give trouble. If it is bought from a market stall then its a gamble.

I used to work for a company making car parts and they had to conform to the necessary BS or ISO standards but there was a big difference in quality of components machined on latest CNC machines compared to ones machined on old rotary transfer machines with form drills.

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