b2b or a2b sterling charger

Discussion in 'Motorhome Chat' started by Red Dragon, Apr 23, 2013.

  1. Red Dragon

    Red Dragon Funster

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    need some help and advice here,I'am thinking of adding either of the above battery charging systems to my van,but which one would be the better choice?
    I currently have 2x130amp Trojan batteries and a 90watt solar panel.
    We do tend to use a fair bit of battery power so need to be able to recharge faster.:thumb:
     
  2. f6c

    f6c Funster

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    If you are traveling every 3 or 4 days then I would suggest a Sterling B 2 B charger works well for me.:Wink:
     
  3. haganap

    haganap Funster Life Member

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    The b2b is simpler to fit, does not void warranty

    The a2b is better and produce more power...

    Pays your money and all that
     
  4. Snowbird

    Snowbird Funster Life Member

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    Forgive my ignorance, but what's the difference.
     
  5. Ralph-n-Bev

    Ralph-n-Bev Funster

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    You have the same setup as we do....2 Trojans and 90w Solar.

    Recently added a sterling battery to battery and it works a treat.

    Charges faster and can supply 40+ Amps just on engine tickover :thumb:
    This comes in handy if you want to use a microwave or hairdryer using an inverter.

    Very easy to fit you just need some thick cable, crimps and a couple of in-line fuses.

    Ralph.
     
  6. haganap

    haganap Funster Life Member

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    The A2B takes it's power direct from the alternator output,

    The b2b takes its power from the alternator but via the battery,

    The A2B will therefore produce higher amp output through electirckery

    My b2b does 50 amps

    I think John's does something like 100 amps. :thumb:

    Mine is fine for my needs,

    But hey, Im a nurse, John's an Electrikery worker. :Wink:
     
  7. Red Dragon

    Red Dragon Funster

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    :thumb:Thanks Ralph,and yes I know Paul its the cost difference but according to Sterling it does'nt interfere with alternator other than maximising its output,they say(Sterling) it does'nt void the warranty.
    As we normally have to journey about 2hours per any destination and can use our 12v system whilst on the the move it would be better for our batteries,just a thought.:thumb:
     
  8. haganap

    haganap Funster Life Member

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    The B2B charger is easy to fit and doesn't void the warranty.

    The A2B charger is hard(er) to fit and CAN void warranty claims. Something about utilising part of the actual running gear. I researched it heavily.

    If you can live with it, get the B2B its simple.
     
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  9. Organplayer

    Organplayer Funster

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    organplayer

    Had Sterling b2b charger fitted by Vanbitz. A super bit of kit.
     
  10. Snowbird

    Snowbird Funster Life Member

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    There is a good chance I have the wrong end of the stick here, but I was always under the impression that constant fast charging of batteries was not good for them. I was always told by old school mechanics that trickle charging was best for them. Just goes to show how wrong I have been all these years.
     
  11. eddievanbitz

    eddievanbitz Trader - Funster

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    Fast unregulated charging is bad for batteries, but controlled fast charging is very effective with the correct set up

    Eddie
     
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  12. pablomc

    pablomc Funster Life Member

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    Useful article here on the subject.
     
  13. Snowbird

    Snowbird Funster Life Member

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    Thanks for the link, but unfortunately its from the company selling the product. Just as a point of interest has anyone checked the temp of there batteries whilst charging at 50/80/ or more amps with these fast chargers. From my experience fast charging makes batteries gas and when they gas they get hot. A very dangerous situation indeed in a motorhome were there are naked flames. Please dont think I am being difficult, but these fast chargers go against everything I have learned over a lifetime of battery care. There is a great possibility that I am wrong but if am right then it could save someone's life.
     
  14. bungy

    bungy Funster

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    The B2B has two temperature sensor connections (sensors are extra unfortunately) that monitor the temps of the terminal on the hab and leisure batteries seperatley - and cut out charging when either goes over a pre set level, i think this level is set by the battery type selector on the unit itself so presumably is set to a 'safe' level...but that is a presumption of course so may be wrong:BigGrin:
     
  15. haganap

    haganap Funster Life Member

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    In all honesty, for a non biased review.

    The only thing that has really peed me off about the b2b charger is,,,,,,




    I never got one sooner :Doh:
     
  16. Snowbird

    Snowbird Funster Life Member

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    Thats as maybe Paul and I don't doubt it does seem a good bit of kit. But that does not answer the question, have you checked if your batteries are getting hot when charging at 80+ amps ?. If they are getting hot then they are gassing and if so are VERY volatile. If they are not getting hot then I would consider the purchase of this machine myself.
     
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  17. haganap

    haganap Funster Life Member

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    Dave, the Batteries do not overheat.

    I can't really say it any simpler. Maybe Jon as in (Jon& Chell) or Eddie Vanbitz will help you out.
    It regulates the tempreture of the batteries to ensure they do not cook. It's a far from simple piece of kit its actually very intelligent.

    I have some other pieces of Mr Sterling's kit and it does all it says it does.


    It actually does the opposite to cooking the batteries, it conditions them.

    I have not used a generator in all the time I have had it bar some hair drying in the Alps.

    i also have a NASA BM1 which monitors the batteries input, output, tempreture, time to charge, time to discharge. A very posh expensive bit of kit, So I know the gumph that Mr Sterling says is happening in my van. Be happy to show you it all when your about.
     
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  18. jonandshell

    jonandshell Funster

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    I will add my opinions this evening when I have access to a keypad big enough for my fingers!

    Bloody phones!:BigGrin:
     
  19. FULL TIMER

    FULL TIMER Read Only Funster

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    You are correct about the sensors but they were supplied with the one I have just fitted, the leads have ring terminals fitted and one end is the sensor, from memory one lead fits to the alternator casing the other to the leisure batteries, the leads are marked and also tell you which end to cut if you need to extend them.
     
  20. Ralph-n-Bev

    Ralph-n-Bev Funster

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    No they dont get hot.
    Best thing we have ever bought for the MH . That and the Nasa , which does exactly what it says on the tin.
    The only downside is getting wound up now when people arrive on site , park up next to us and put their genny on straight away for hours . :Rofl1:
     
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