Extra battery question

Discussion in 'The Beginner' started by slinger, Apr 13, 2008.

  1. slinger

    slinger Deleted User

    I am an electrical engineer but new to motor homes, I have a Burstner Solano with a 75Ah liesure battery, I would like to add another 75Ah in parallel, am I likely to have any problems with this? Would it be cheaper to just replace the 75Ah with a 150Ah?Eventually I want to fit solar panels but one step at a time.
     
  2. Winston_C_4ever

    Winston_C_4ever Deleted User

    personally i woodnt bother buying solar pannels as they are extremely ineffient. i'd suggest u use wind power. it might be a better idea to get a more powerful battery as the present one mgiht be old therefore might need replacing anyway. also 2 battires = more space and more weight = waisting fuel carrieng around extra weight for the sake of it :Smile:
     
    Last edited by a moderator: Apr 13, 2008
  3. Tony Santara

    Tony Santara Funster

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    I agree with Winston if your original battery is tired it would constantly drain your new one shortening its life
    I decided to sack my 75ah for a new 150Ah also saving space :thumb:
     
  4. Digger Driver

    Digger Driver Read Only Funster

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    I have 3 batteries on mine!
    A 95 amp, a 100 amp and a 120 amp!
    According to all the fitters i have talked to you can fit as many as you like!
    It just puts a little more stress on your alternator!
     
  5. Gonewiththewind

    Gonewiththewind Read Only Funster

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    Hi Slinger,
    Each to thier own, I went down the road with solar panel and doubled up my battery.
    with a 130 watt panel and 2 x 110 amp batteries I dont go near hook ups.
    For what its worth winter is great for winds and so is Fuartaventura (spelling) But if you get a good summer, where is the wind.
    My solar panel work 52 weeks a year, ok, variable but your wind turbine is going to be even more unpredictable. Have you ever noticed how the big turbine dont work in the high wind !!!!
    Ill stick with the solar. Work on the basis 50 Watt panel + 50 Amp battery per adult as a minimum.

    Don
     
  6. Geo

    Geo Trader - Funster

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    It also means your two larger batteries are working as your lowest ie 3 x 95amp.
    multiple batteries should be matching batteries
    ie a new 75 amp battery put with an old 75amp only giving say 60 amp, would make the new one work at 60 amp also
    Geo
     
  7. Digger Driver

    Digger Driver Read Only Funster

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    I do know that but i get my batteries for free!
    They work forever after being fully charged!
     
  8. stagman

    stagman Deleted User

    Nothing wrong with solar panels,more reliable than wind quiter than a genny,I have 3x110 amp and a 70w solar panel,3 weeks in France no need for hook up ,
     
  9. slinger

    slinger Deleted User

    Thanks guys,

    My 75Ah battery is nearly new (18 months). So I have to decide on the weight issue and either get another 75 Ah or swap it out for a 150.

    I like the solar panels, even though they aren't efficient , they do work all the time. I have done a lot of study if wind power and I don't think it is what I want.

    Any recommendations on Solar panels?
     
  10. Gonewiththewind

    Gonewiththewind Read Only Funster

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    Hi slinger
    You Asked "Any recommendations on Solar panels? "

    Can only repeat myself. When I was looking into my solal panel, I was advised to look at, as a minnimum, 50 Watt of Solar Power and 50 Amp of battery for every adult.

    I am a Loner but went for 130 Watt Solar and 2 x 110 Amp Battery.
    My panel came from
    photovoltaic Solar Panels


    works for me.

    Don
     
  11. slinger

    slinger Deleted User

    Fiited and working

    Hi Guys,

    I have fitted my second battery, I got an identical model Varta 90 Ah from a local supplier at £99.73 inc vat which I thought was a good price as the cheapest online was £122 + £10 delivery. I had trouble finding a battery tray and in the end I went for a battery box from the 12 volt shop for about £13.00. I used 16mmsq 100A cables and a 100A fuse to protect them. the large cable size keeps the resistance low and should give me fairly even charging as the charger is connected to the original battery and I didnt want to muck about with moving existing cables. The cable distance between the batteries is about 1m. I found an existing hole in the floor and routed the breather tube out through that, there was a lot of pipes and cables under the floor and I didn't fancy having to drill a hole! The whole job came to about £130. So I now have 180 Ah, next project will be solar panels.
     
  12. Bulletguy

    Bulletguy Read Only Funster

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    How much?????????:Eek!::Eek!::Eek!:

    Are the terminals gold plated or something?

    A supplier in my locality sells 110ah at £56 and that comes with a TWO YEAR warranty as well.

    Can give anyone on here the details if they are looking for a new battery.
     
  13. stagman

    stagman Deleted User

    Agree do sound a bit on the expensive side.
     
  14. pappajohn

    pappajohn Funster Life Member

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    that'll be £60 for the battery and £40 for the Varta name. :Rofl1::thumb:
     
  15. bobandjanie

    bobandjanie Funster Life Member

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    Hi Slinger it all depends on how long you stay in one place, we have 2 x 85 ah and we go 3 days no problem, Solar panels are a lot of money but worth it if you need them . We have a generator which we hardly ever use, and I think it would be the same with solar keeping the batteries charged up, Yes they would but if we were to move on after 3 days they would charge anyway! So its only buy what you need we all have so much stuff we dont need. Good Luck. Bob.:Eek!::Wink:
     
  16. oldun

    oldun Read Only Funster

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    I am interested in this type of panel as mine definitely do not work at night.

    I agree with the comment on wind turbines. They are more difficult to store/carry, more difficult to erect, work only when it is reasonably windy, are unsightly and can cause vibrations through the van.

    Solar panels are much more efficient/effective.
     
  17. Bulletguy

    Bulletguy Read Only Funster

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    Depends on what you are expecting from them?

    My mate bought a small one to stick in his windscreen as his MH spends long periods standing idle in the driveway. Cost £9.99 from Maplins it proved enough to keep his battery topped up to start on the button.

    If you expect to run TV, PC, fridge whilst keeping the batteries charged up you need to be shelling out a few grand for panels the size of your roof.

    I can well understand 'full timer' folks investing in serious solar or turbine power, but it would take years for the average weekender to recoup the cost.
     
  18. roger loiselle

    roger loiselle Deleted User

    The result of my research on solar is this:
    Solar is useful if you are always going to camp wild. If you use sites with plug -ins solar is a waste of money as your batteries will charge as soon as you go onto mains.
    In between stops, whilst motoring you are charging.
    A second battery same size, same age, will give you about three days power when camping wild.
    There again I am a newbie, what do I know?
    Regards Roger Loiselle
     
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  19. iceni

    iceni Read Only Funster

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    I agree with windy. I dont even think about the solar panel. Just make sure you get one big enough and get the battery capacity to go with it otherwise the solar will shut off when the battery is full anyway and so waste the charge...unless you fit a battery master and then it will start to charge the vehicle battery.

    turbines are good if its windy and will work all night too but they all have to be set up when you arrive. Not really any good if you wild camp.

    Phill
     
  20. Douglas

    Douglas Read Only Funster

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    I can only describe my own system as everybody will have different demands from the 12volt system.

    First I use a computer for 3 hours a day then the TV for another 3 hours and that represents quite a lot of amps a day.

    To supply this I have 3 solar panels, 2x85 watts and 1x50 watt, total 220 watts going into 300amp batterys.

    As we use the motor home in the winter there are days when there is no sunshine so the batterys have to be big enough to supply for at least 2 or 3 days with very little charging.

    The other thing I do is to mount the solar panels so that at least onw of the 85 watt panels can be lifted up to face the sun as panels that are flat only recieve 1/3 of to possible max that it could recieve.

    But of course I am full timing, and wild camping but if you are using camping sites and only for a few weeks a year you want need any thing like the needs that I have.

    Horses for courses,

    Doug...
     
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