Choosing a new battery

Discussion in 'Water Fed Pole Cleaning' started by Beccy, Aug 31, 2015.

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  1. Beccy

    Beccy Active Member
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    Any tips? There's so many, where do I start?

    I recharge it in the shed overnight, rather than keeping it topped up while out and about and I don't have a lot of space for a big battery. Maximum size I can fit is 22.5 x 19 cm. Any height is fine.

    :)
     
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  2. Beccy

    Beccy Active Member
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    Anyone? :)
     
  3. Lead acid 12v leisure battery?
    When we were off grid I had six of the cheapest I could find. Think they were numax, worked pretty good for the money. How many hours will it run a day? You'd get away with smaller lighter 40ah if you're not drawing a lot off it.

    If you want quality, then Trojan batteries are known to be good, you'll pay for them though.
     
  4. spruce

    spruce Grand Master
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    Beccy
    Your max battery size is very small and I can't find a suitable leisure battery that size. I looked at Numax and Trojan. I also looked to see what Banner had. The problem is the length.

    I think you have a car battery at the moment which is probably why you are having an issue with it. I couldn't read the model on the photo you supplied a while back.

    I see Enduroline do a 50 amph battery which will fit into your space.
    https://www.tayna.co.uk/50Ah-Leisure-Batteries-G440.html
     
  5. Beccy

    Beccy Active Member
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    Yes, it is a car battery. That's what the ex used before we split and I took over the business. When I replaced the battery I didn't know any better so just bought the same again. I've learnt a lot through being on here! I'll post the spec of it tomorrow for you :)

    I work fairly short days to fit around childcare whenever possible... Usually a full day for me is no more than 6.5 hours.

    What about the small leisure type batteries that I used in my homemade trolley? Like the one in Jimmyboots' tutorial. I know they wouldn't last a whole day, but could I do something clever using two of them?

    Edit to add link:

    http://www.batterymasters.co.uk/P...buq3F_BSf-bE1xQff1TqCJvNTQYrQgo-XqBoCf8Tw_wcB
     
  6. adamangler

    adamangler Wakefield Window Warrior
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    Hi beccy

    i use the exact battery you posted in the link, i have a 9ah one and a 12ah one i initially bought for a trolley system but have been using them as a van mount for about 6 months. They just about last me a day say 12 houses. not run out yet touch wood but getting a bigger one soon.

    as for clever, i simply use them seperately swapping them over when one runs out. you could use them both at the same time wired together but that would make one big battery is effect which is not what u wanted
     
  7. Wire two batteries in parallel to keep the voltage at 12?
    That's pos to pos and neg to neg.
     
  8. spruce

    spruce Grand Master
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    #8 spruce, Sep 2, 2015
    Last edited: Sep 2, 2015
    Space is the problem on Beccy's trailer and I don't think two of those in wired in parallel will still have enough capacity.
    We have a backpack on the van and it last's my son a full working day.

    The reason why they work is that they use small pumps which consume a lot less current. But they wouldn't successfully (IMO although I'm sure lots will contradict this) pump water through a long hose on a reel like you have. A backpack is usually just a short hose coupled to the pole hose. This would be similar to a trolley.

    Those pumps probably consume about half the current your pump on the trailer does.

    The link you posted is for a 9 amph battery. Your pump will draw about 4 to 4.5 amps an hour so that battery would be completely flat after 2 pump working hours. On residential we estimate that our pumps run for around 50% of the time, probably a little less. On commercial we work on about 85 - 90% working per hour.
    These are based on the flow rate we use (for me 2 liters a minute), how much water we have to put back into the tank at night to refill and how long we worked for that day.
     
  9. Guess you could ring up battery megastore and ask what's available with those dimensions? Don't forget to check God damage if couriered. I'd have a couple arrive split.
     
  10. Beccy

    Beccy Active Member
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    Thanks guys. This is the spec of my current battery:

    [​IMG]

    I'm still failing to understand something though (from this thread and my pump controller thread)...

    I get that the capacity of my battery could be shot and if that was the case then after a certain (smaller than usual) amount of work it would stop working, but surely at that point the multimeter would be agreeing with the pump controller that the battery is flat? The multimeter and magic eye thingy on the battery both say that the battery is fully charged at the same time that the system stops working.
     
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