I have just purchased a new Leisure Bsttery for my Crusader Super
Sirocco which is fitted with the Evolution AWD 4x4 motor mover.
The battery that I originally bought was rated at 110 ah , the new battery which is a Numax LV26MF 100ah c20 maintainence free is slightly smaller in length than the Platinum 110ah that I am taking out of the van.
I queried with the sales assistant why is was rated at 100ah and was told that under new EU regs the manufacturers have to display the minimum output now on the battery not the maximum and that the 85ah are now labelled as 75ah. But both batteries are the same as what they were selling as 85 and 110 ah?
Before I fit this new battery could anyone let me know if this is right as I am taking the can to Italy this summer and know when I get there that there will probably be loads of manoeuvring on the pitch to get the can into a position that I can get the awning and car on.
My previous Platinum batteries gave always given good service with my AWD movers and not sure now if the Shorter Numax 100ah will be man enough to move my twin axle can running 4 movers?
Thanks for your help ?
The average single axle motor mover uses about 20 amps. Therefore a 100ah battery should run your twin motor movers for about 2.5 hours. You just might have enough time for manoeuvring.
Hi freestlast , thanks but would it still give enough output after it drops below a certain level? I.e if it dropped say to 40 or 50% charge would it still have enough go to move the van?
I think the recommendation for the 110Ahr battery with a mover is to allow for someone going away off EHU for a few days and still having enough charge for the mover when they get home. For many it's an overkill.
Modern movers, certainly Pwrtouch, won't operate below 12 volts, which is a 50% charged battery. Never go below this.
If you can find out the average power (amps) that your mover uses then you can estimate how long the battery will last before it has discharged by 50%, which in your case is 50 amp hours.
So, if on average your mover uses 20 amps, then it will last for 2.5 hours ( 2.5 hours x 20 amps = 50 amp hours)
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12 volt under no load is a very flat battery.. 12.6 volts fully charged after being stood for a few hours..
a battery is rated at a 20 hour discharge which would be 5 amps for 20 hours for a 100 amp hour battery..
with a higher discharge the capacity wont be quite as much i am guessing here but a 100 amp hour battery should maybe manage 4 actual use at 20 amps at least..
ether way a 12 volt no load reading meaning a half charged battery is simply wrong.. 12.3 volts no load would be at 50% 12 volts is very close to fully discharged..
the mover may well only use around 20 amps whilst on the move and on the flat but will draw up to 80 amps on a slope or when starting the van from stationary.. more so on rough ground..
even a half discharged 100 amp hour leisure battery will still deliver several hundred amps if required for a short period.. certainly enough to power a motor mover..
the capacity recommendations are based on normal use and not just powering the mover..
trog
ps.. note any figures are approximate.. as stated on the above chart.. he he
and above all even a well knackered battery will still show the same no load voltage figures so in many way they dont mean what they may seem to mean..
on saturday (failed car alterator) i spent two hours putting an 8 amp hour charge into my tow truck with portable generator.. parked on double yellow line in narrow one way street in Bawtry.. he he
a voltage reading of 12 volts just managed to turn the engine over and start it..
i got ten miles down the road before having to make another stop and repeat the processes.. in a lay-by this time so we cooked dinner and gave things a bit longer..
it seems the trucks alternator had died a few hundred miles back (no warning lights came on) and we had been running on the truck and van batteries for at least a couple of days with nothing charging them at all.. the portable generator saved the day.. he he
but i have spent few hours looking at volt meter readings very recently.. i would still maintain that a no load reading of 12 volts is very close to flat :)
i speak from experience and not something i have read somewhere on the internet.. he he..
yes the sales man is correct regarding revised amp hour markings .how ever I think you are over worrying,your leisure battery should be fully charged from your car by the time you get to your campsite ,& once you are settled the battery will be recharged by the site UHU. We did a 21 day tour of Morocco albeit we only had a single axle mover, & most of the time we were either wild camping or the site electrics were non functioning at no time did we have problems with the mover or any other 12v system ,& we had an old 85amphour rated battery
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Topic: Battery Help Please
