View Poll Results: Which Battery Caps Have YOU Fitted?

Voters
18. You may not vote on this poll
  • Hydrocaps

    2 11.11%
  • Water Miser

    9 50.00%
  • Neither, Waste of Money

    7 38.89%
  • Other (Name in Thread)

    0 0%
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Thread: Hydro or Miser Battery Caps?

  1. #1

    Smile Hydro or Miser Battery Caps?

    What have YOU installed to your batteries:

    Just before spending,

    $52.20 on 12 Water Miser Caps

    OR

    $136 on 12 Hydrocaps.


    I thought I would run a small poll just to see how popular they are to 'expert' solar users on the forum?

    thanks

    mick
    Last edited by Mick-UK; June 19th, 2009 at 11:30 PDT.

  2. #2
    Join Date
    Sep 2006
    Location
    Willits, CA
    Posts
    5,663

    Default Re: Hydro or Miser Battery Caps?

    Can someone ( a user? ) explain the differences of these 2 types ?

    As I understand it:
    one type helps retain the water droplets as the battery bubbles, vents the gas

    one type has a catalyst that re-combines the O & H gas from the bubbles, back into water, to reduce water loss. BUT they have to be removed to Equalize ? (if that's true, what's the point, of having to always take caps off and back on, and acid mist over everything)

    I also am facing the same decision later this year
    http://tinyurl.com/LMR-Solar
    http://tinyurl.com/LMR-BigLug
    http://tinyurl.com/LMR-NiFe

    Grundfos 10 SO5-9 with 3 wire Franklin motor (1/2hp 240V 1ph # 214505 ) on a timer for 3 hr noontime run - Runs off PV
    Powerfab poletop PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe battery | 15, Evergreen 205w "12V" PV | Midnight ePanel || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT

  3. #3
    Join Date
    Jul 2007
    Location
    Ontario Canada
    Posts
    815

    Default Re: Hydro or Miser Battery Caps?

    Hi
    I commisioned my system 5 years ago (plus 2 weeks), and my Hydrocaps lasted about 4 of those years. Upon researching them, if possible to revitalize them, I found out they are designed for x number of amp hours of charge. I guess I used the requisite number of hours and one by one they quit working.

    While they worked they were great. Watering the batteries was a once or twice yearly job. Now, I check the sg's and water them once a month...now I have a much closer/better idea of my batteries's health and status (much more comfortable.) The monthly maintenance takes only 30 minutes per month...at my hourly rate of l;afafj$ per hour, it makes sense to do 30 minutes per month rather than over $500 for new caps. (my accountant/spouse wholeheartedly agrees!)

    The non-working caps are still on the cells because they are a great size for zipping on and off with little effort (fits the palm of your hand instead of just thumb and finger on a small cap).

    Good luck on your poll.

    Ralph

  4. #4

    Default Re: Hydro or Miser Battery Caps?

    After decades of using batteries as they come, I've never found the need to re-water that much or that often. If you do, chances are you're over-charging. I've gotten plenty of years good service from batteries, so I fail to see where the value is in "water recovery caps" of any kind.
    1220 Watts of PV, OB MX60, 232 Amp hrs, OB 3524, Honda eu2000.

    Ohm's Law: Amps = Volts / Ohms
    Power Formula: Watts = Volts * Amps

  5. #5

    Default Re: Hydro or Miser Battery Caps?

    I use single point watering. This has made wet cell management almost fun. Rather than having to take off 36 caps and replace them, it now takes less than 2 minutes to water 12 batteries with each cell at the same level(no spills).

    A 2 gallon tank of distilled water sits above the bank with a suitable length of vinyl hose and a quick connector. Battery caps have a flip cover that gives access for a hydrometer when needed.

  6. #6
    Join Date
    Jul 2007
    Location
    Ontario Canada
    Posts
    815

    Default Re: Hydro or Miser Battery Caps?

    But then how do you know if one cell is using or not using little or excessive water? Just by when hydrometer readings are taken?

    Ralph

  7. #7
    Join Date
    Jan 2007
    Location
    Remote Desert Mountains Arizona
    Posts
    412

    Default Re: Hydro or Miser Battery Caps?

    Water misers sure have worked for me.
    Off Grid 4x5500SW Plus Xantrex SinePlus Inverters/48V DC System/44x185W Sharp Panels/64xTrojan L16-REB 6v/4x"Ornamental" Desulfators/2xOutback FlexMax 80s'/Water Misers/Inverter Managed Air Extractor System/Output to 2x100Amp AC Service Panels/Two 2.5 Ton Central A/C Units/Generator CumminsOnan RS20000/RASTRA Construction

  8. #8

    Default Re: Hydro or Miser Battery Caps?

    The single point system I use has a visible float indicator on each cell that shows the acid level. I observe before watering for any level changes that would indicate excessive water use for an individual cell or battery.

  9. #9
    Join Date
    Sep 2006
    Location
    Willits, CA
    Posts
    5,663

    Default Re: Hydro or Miser Battery Caps?

    Quote Originally Posted by sawmill View Post
    The single point system I use has a visible float indicator on each cell that shows the acid level.
    What system is that ? Mfg/ vendor
    http://tinyurl.com/LMR-Solar
    http://tinyurl.com/LMR-BigLug
    http://tinyurl.com/LMR-NiFe

    Grundfos 10 SO5-9 with 3 wire Franklin motor (1/2hp 240V 1ph # 214505 ) on a timer for 3 hr noontime run - Runs off PV
    Powerfab poletop PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe battery | 15, Evergreen 205w "12V" PV | Midnight ePanel || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT

  10. #10

    Default Re: Hydro or Miser Battery Caps?

    mike

    Here is the link to battery filling system that I use.
    http://www.batteryfillingsystems.com/

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