ok, you got me! what is a B2B charger

Discussion in 'Tech/Mech General' started by sadlonelygit, Oct 16, 2014.

  1. sadlonelygit

    sadlonelygit Read Only Funster

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    i know it's battery to battery........[​IMG].............but how is it wired in and just what does it do?
     
  2. jonandshell

    jonandshell Funster

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    Its a voltage amplifier which provides a rapid 4 step charge to your leisure battery whilst your engine is running.
    It will charge your battery 5 times faster and 20% more than the original split charge system.
     
  3. Kiwi Coss

    Kiwi Coss Funster

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    Is it worthwhile investing in? I have 3x 110watt batteries total 330 watt and I have run out of batt only once. We full time wild camp so depend heavily on the batts as a long time between electri hookups. also 180 watts solar panels.
    Colin
     
  4. hilldweller

    hilldweller Funster Life Member

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    If the 5x faster stands up the one hour's running of the engine gives you four hour's charge.

    330Ah will take a long time to charge off the normal split charger system.
     
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  5. chaser

    chaser Funster

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    You have got to be driving though, if you are parked up for days on end it's not going to make any difference.
     
  6. hilldweller

    hilldweller Funster Life Member

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    Yes it will. A one hour engine run will stuff in 5h of charge, allegedly, never tried one.
     
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  7. Jim

    Jim Ringleader

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    We use ours like you might use a gennie. If Sian is going to hammer the batteries through our inverter by using a 2kw hairdryer or Katie using straighteners then I start the engine while they are using them and the B2B ensures we essentially lose no charge.
     
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  8. scotjimland

    scotjimland Funster Life Member

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  9. jonandshell

    jonandshell Funster

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    Heres an example,

    We park up in the Alps for a weeks skiing.
    There is little daylight because we are in a valley and it is winter. The roof is covered in snow, so solar is a waste of time (and bad for your batteries anyway, but that's another story).

    We have the heating running 24/7 to stop things freezing, use the hairdryer a little, charge tablets, phones, etc and use the TV and lights as required.

    After 2 days, the batteries are a bit discharged so I run the engine for an hour and a half whilst we have dinner. The habitation batteries are now fully charged and we wait another two days before running up the engine again.

    Our battery bank is 345Ah and the Sterling Alternator to Battery charger charges at 90 amps on tickover.
    A 50 amp battery to battery charger would take twice as long, but you get the idea.
     
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  10. sadlonelygit

    sadlonelygit Read Only Funster

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    so...........we have a 110a/hr battery with a 2k inverter (hairdryer and andrew james griddle thingy), so it seems like the dobrey that tricks the alternator into giving some serious juice is the answer.
    so how easy/hard/friggin' impossible are they to fit, bearing in mind i'm quite happy to strip a motorcycle gearbox to bits................and get it working again:)
     
  11. haganap

    haganap Funster Life Member

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    I wired mine in and trust me.....

    I'm proper thick ....

    Would personally add another battery too if you can though....
     
  12. lou020

    lou020 Funster

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    i was always told, never rapid charge a vehicle battery as it shortens its life dramatically.
    It should be trickle charged ?
     
  13. jonandshell

    jonandshell Funster

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    If slow charging was best for batteries, our fleet of rental forklift trucks would need 6 batteries each to keep up with their shift patterns!
    Our habitation batteries are now over 6 years old with full capacity still remaining. They have always been charged by a fast charging Sterling product.
    Fast charging is only bad for batteries if you don't or can't keep the electrolyte topped up.
    Open lead acid batteries lend themselves best to fast charging, sealed, AGM and gel types cannot be charged as rapidly, but certainly faster than with a conventional split charge system.
     
  14. scotjimland

    scotjimland Funster Life Member

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    (my bold)

    Interesting comment Jon, .. would you care to explain ..?

    maybe better on a new thread.. "Why Solar is bad for your batteries" ?
     
  15. Terry

    Terry Funster Life Member

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    Hi Jim knowing John if he says it's bad for them he WILL have experimented to find out why-they may not get fully (100%)charged or something :)-looking forward to his reply
    terry
     
  16. jonandshell

    jonandshell Funster

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    OK chaps!

    Stand by for a contentious thread!
     
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