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  • #91
    Varta promotive silver batteries are not flooded lead acid, they are AGM absorbed glass mat. please send the specific model number. here is a list http://www.varta-automotive.com/en-g...ilver-dynamic/ all the varta silver are not deep cycle they are starting batteries, I do not see a 225 AH battery the biggest they list is 110..... I may have the wrong info.

    AGM batteries dry out with use. hard to restore.

    Tom C


    experimental Kits, chargers and solar trackers

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    • #92
      hello tom
      its under commercial vehicles

      http://www.varta-automotive.com/en-g...er/725-103-115

      on this one i can open the caps and see the water acid level and add when needed

      kind regards
      stephan

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      • #93
        hello tom and guy and of course all others

        we just did a test with a bosch battery tester T12300E
        at 700 amp setting
        test came out as being verry good
        so on this old battery we came back from really dead to verry alive in just 6 weeks

        despite discharge whilst on the wheel.

        right now the old one is outperforming the new battery
        same test on the new one resulted in 20 percent less capacity

        verry happy and kind regards
        stephan and serge

        up to the new chalange
        reconditioning a forklift accu pack

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        • #94
          congrats guys!!

          Tom C


          experimental Kits, chargers and solar trackers

          Comment


          • #95
            we apreciate this from you and also manny thanks from this end to you guys out there to start this all up
            and of course all your help so far
            please forward our gratitude to john as well

            kind regards
            stephan and serge

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            • #96
              hello folks

              finally i got my hands on a usb capable voltmeter
              what software you guys use for logging?

              kind regards
              stephan

              Comment


              • #97
                did your meter not come with software? radioshack has software called meterview, not sure if it will work for your voltmeter.

                Tom C


                experimental Kits, chargers and solar trackers

                Comment


                • #98
                  Dear Tom C,

                  Here a question for everybody,now we load the big battery in 8 hours to be abel to discharge it at 130watts lets say 1hour and 45min.
                  two weeks ago we needed 20hours of load for the same discharge at 130watts and 1hour and 45min.
                  the reason that we stop at about 8 hours charge is that we don't want to let the battery to long charge at 15v50/15v60.
                  so what i want to know is can we break the plates or cook the acid in the battery or what's your opinion?should we continue to load further to 20 hours?
                  but please a fair answer we can not permit to dammage this battery.

                  Kind regards Serge.

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                  • #99
                    hello folks

                    new tooling arrived
                    midtronic exp-1000 battery tester
                    results on our battery
                    result good battery
                    voltage after 2 days standing 13.06v
                    measeured 1124 A(EN)
                    rated 1150 A(EN)
                    temperature 10 degrees
                    soc 100%

                    verry sweet results i would say for a doorstop

                    kind regards
                    stef and serge

                    Comment


                    • I would not worry about full discharging, you are not doing c.o.p. testing. take half out of the battery and start again. its the pulse charging that removes the sulfation.


                      Tom C


                      experimental Kits, chargers and solar trackers

                      Comment


                      • Dear Tom C.

                        thx for the good advice but my collegue Stef had allready find the answer, but it's also nice to here it from you guys.

                        Kind regards Serge and Stef.

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                        • wild weasel

                          Which resistors you use in your system?
                          If MJL21193 then put resistance 2003 Ohm,this can give you a lot of radiant spikes with low current consumption.
                          It takes a lot of time to charge the battery to full capacity, what is important to know don't discharge battery below 11 Volts!
                          I wouldn't recommend to work with junk batteries, because its difficult to analyze the state of the battery, better work with new batteries.
                          Look at my channel :

                          Comment


                          • hello BEDINSSGUKRAINE

                            our resistors are standard 470 ohm
                            we run the system to recondition old batterys so we keep at it this way

                            radiant is at pressent not our research this will be later on when we have more funding

                            kind regards
                            stephan and serge

                            Comment


                            • just did a long term discharge run on the good restored battery
                              5 hour discharge at 130 watt from 12.98volt (standing voltage after 1 week) till 12.18 volt under discharge
                              after 1 hour rest its back to 12.60 volt standing and still climbing slowly
                              when i look at the tables i have it should be 5 hours discharge and return to 12.40 volt

                              looking good now

                              kind regards
                              stephan and serge

                              ps i will work out our procedures later this evening so others can test if they get same results the way we did it

                              Comment


                              • Dear Tom,

                                Do you have experience with the following question?Or anyone else who also reached c20 ratio.
                                I think if we work out daily to do a discharge ratio c20 so that means 5 hours dis on 11.25A(for a battery 225A) that we can ameliorate even better the capacitie of the battery, or not?

                                Kind regards Serge and Stephan.

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