Time to change batteries

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Comments

  • softdownsoftdown Solar Expert Posts: 2,904 ✭✭✭✭
    edited September 2019 #62
    mvas said:

    softdown said:
    The fact that many manufacturers have changed their mind so many times gives some pause for reflection. It would be of some interest if a clear battery case was possible. 
    All deep cycle Lead Acid batteries, have always required equalization - even AGM batteries.
    This has never been refuted, by any AGM battery manufacturer.

    The problem is  ... the "maintenance-free" battery was originally designed for the brain-dead consumer
    The catch-22 is ... equalizing an AGM battery, to maximize its cycles / life, requires skill / knowledge

    No two batteries are identical
    No two battery chargers are identical
    No two discharging applications are identical

    Lead Acid battery technology is evolving.

    Given these facts ...
    It is irrational for you to assume that - one generic set of charging parameters is best for everyone and should never change.
    Life Line has helped owners design a custom set of bulk / absorb / equalize / float parameters, optimized for their environment.
    Wow - (note really necessary. -Bill the moderator) Then we have Mark K who recently stated that Fullriver does not recommend equalizing their batteries. 
    First Bank:16 180 watt Grape Solar with  FM80 controller and 3648 Inverter....Fullriver 8D AGM solar batteries. Second Bank/MacGyver Special: 10 165(?) watt BP Solar with Renogy MPPT 40A controller/ and Xantrex C-35 PWM controller/ and Morningstar PWM controller...Cotek 24V PSW inverter....forklift and diesel locomotive batteries
  • mvasmvas Registered Users Posts: 368 ✭✭✭
    If you can see, or can enlarge the photo, These CSB AGM's recommend a cycle duty charge voltage of up to 15 volts. Are they getting better at recombining the hydrogen gas? Stronger vent valves?


    The CSB data sheet states, "Equalization Charging Volts = 14.4 ~ 15.0 Volts @ 77F"
    but they do not tell us, how and when to use 15.0 volts = useless information.

    15.0 volts is nothing to get excited about, because the Life Line AGM states ...
    "Conditioning Charge = 15.48 volts @ 77F for 4 hours, once every 3 weeks" 

    Life Line provides very clear charging information to use as a baseline.
  • papabpapab Registered Users Posts: 49 ✭✭
    I'm still curious what the battery experts here think that coachdad may have done wrong to get such short life out of his batteries.   We learn from failures like this.
  • softdownsoftdown Solar Expert Posts: 2,904 ✭✭✭✭
    He said it was a "no no" to mix old and new batteries - which kind of indicates that one or two batteries failed prematurely. Some think the charging regimen was not correct. Plenty of possibilities - interesting that it happened twice. Thinking he replaced them in Julyish. 

    I'd be on my sixth string, or so, if I did not mix old and new batteries. Mixing them is technically less than ideal but realistically done all the time. A number here sell more batteries than they buy which is surely a mere coincidence. 
    First Bank:16 180 watt Grape Solar with  FM80 controller and 3648 Inverter....Fullriver 8D AGM solar batteries. Second Bank/MacGyver Special: 10 165(?) watt BP Solar with Renogy MPPT 40A controller/ and Xantrex C-35 PWM controller/ and Morningstar PWM controller...Cotek 24V PSW inverter....forklift and diesel locomotive batteries
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