Newbie - Need help

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  • SunEagle
    Super Moderator
    • Oct 2012
    • 15126

    #16
    Originally posted by Green Hog
    Thank you.

    Is this a good starting point - eBay item number: 324251259536, with two deep cycle 12v 100AH batteries wired together?

    Andy.
    I found that you can get more out of 2 x 6V 215 Ah batteries wired in series. The cost should be less than 2 100Ah and you have less of an issue then wiring 2 batteries in parallel.

    Comment

    • Mike90250
      Moderator
      • May 2009
      • 16020

      #17
      Originally posted by Green Hog
      ..... two chargers will be on 24 / 7, apart from when I will be out riding, the total output is 0.384 watts, .......

      .384 w ~ .4W
      .4w @ 13V = 0.031A to charge 8 batteries ( 2 chargers, 4 batteries each, if I understand it right ) is not right.

      8 bike batteries, on trickle charge of .25A each = 2A @ 13 v = 26 watts - at the very least. x 24hr = 624 watt hours daily to keep the chargers ( 8 motorcycle batteries ) going.

      Not wanting to be argumentative, to guide you with realistic #'s, I'm doubting the terms you are using,

      Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
      || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
      || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

      solar: http://tinyurl.com/LMR-Solar
      gen: http://tinyurl.com/LMR-Lister

      Comment

      • Green Hog
        Junior Member
        • Aug 2021
        • 12

        #18
        8 batteries, not sure were you got this info from? I will not be in my workshop till the weekend, I will check the Ah of 'both' batteries & add this info to see if this helps with answering my question.

        Thanks,

        Andy.

        Comment

        • foo1bar
          Solar Fanatic
          • Aug 2014
          • 1833

          #19
          Originally posted by Green Hog
          I will check the Ah of 'both' batteries & add this info to see if this helps with answering my question..
          What you need is how much power is consumed by the charger when it's charging. Not the Ah of the batteries being charged (although based on the Ah of the batteries being charged, people can probably make an educated *guess* at the power needed for charging.)

          I think you should borrow (or buy) a kill-a-watt meter, and plug the charger into that, then see how much actual power is used when it is charging batteries. (Is it really charging batteries, or just being used as a battery tender - ie - making sure you don't have a dead battery when you haven't started the motorcycle in weeks?) Looks like it can output to the battery ~0.8A, 12V. Which would be 9.6W. That's probably a good enough number - if it's being used as a tender, it won't be that high.

          Probably your best option is to pay an electrician to run electricity out to this garage. You can probably get it done for less than the cost of the off-grid system. And I'd think the owner would be willing to let you do it - since it'd be improving his property.
          Second best is probably to use an extension cord (or maybe 2, to two different circuits if you're going to be running grinders, drills, and other things with motors.)
          Third best option is probably a generator, or a good inverter hooked up to your car's battery when you are there.
          Somewhere way way way down the list is an off-grid solution. I think it's well below finding a solar-power based battery minder for keeping the bikes' batteries topped up, and a couple of Li-Ion battery pack powered LED work lights/flash lights from your favorite tool manuf. (dewalt, milwaukee, makita, etc. etc)

          PS - are you in the US or somewhere else? A kill-a-watt meter would probably be the US brand - if you're somewhere else, there's likely an equivalent.

          Comment

          • Green Hog
            Junior Member
            • Aug 2021
            • 12

            #20
            I live in England.

            Optimates are battery tenders not chargers.

            The garage is not at my house.

            A generator is not an option, the battery tenders need to be on 24 /7. The residents were the garage is located wouldn't appreciate one running 24 / 7, never mind all the pollution.

            I'd have to look in to the third option on your list of suggestions.

            Thank you,

            Andy.

            Comment

            • Mike90250
              Moderator
              • May 2009
              • 16020

              #21
              Originally posted by Green Hog
              .................

              This is what will be used a lot:

              x2 - Optimate 4 battery chargers - 0.384 watts (these will be on constanly, when the bikes aren't being ridden).........
              I read this as two chargers that manage 4 batteries, a total of 8 batteries


              So, how many bike batteries will be maintained on charge 24/7 ??

              Maintainers generally charge at 1-3% of the battery capacity

              Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
              || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
              || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

              solar: http://tinyurl.com/LMR-Solar
              gen: http://tinyurl.com/LMR-Lister

              Comment

              • Green Hog
                Junior Member
                • Aug 2021
                • 12

                #22
                2 batteries.

                Comment

                • Mike90250
                  Moderator
                  • May 2009
                  • 16020

                  #23
                  Originally posted by Green Hog
                  2 batteries.
                  OK, I see we're going to have do this a line at a time.

                  What size ( in Ah) is each battery ? 20ah 40ah ??
                  Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
                  || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
                  || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

                  solar: http://tinyurl.com/LMR-Solar
                  gen: http://tinyurl.com/LMR-Lister

                  Comment

                  • Green Hog
                    Junior Member
                    • Aug 2021
                    • 12

                    #24
                    I previously mentioned I will be checking the Ah this weekend.

                    Comment

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