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Thread: Charging 3 105 AH batteries with SSG

  1. #1

    Charging 3 105 AH batteries with SSG

    Hi,

    I bought three 27DC marine batteries on sale back in April. I initially charged them with my 10A12 charger and they've been sitting unused ever since. I plan on building a three battery supply SSG like Peter Lindemann demonstrated at the 2016 Conference but haven't started it yet. So I figured I'd better charge them all up again. Here's a video of them charging on my SSG.

    Gary Hammond,

  2. #2
    Senior Member Faraday88's Avatar
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    Quote Originally Posted by Gary Hammond View Post
    Hi,

    I bought three 27DC marine batteries on sale back in April. I initially charged them with my 10A12 charger and they've been sitting unused ever since. I plan on building a three battery supply SSG like Peter Lindemann demonstrated at the 2016 Conference but haven't started it yet. So I figured I'd better charge them all up again. Here's a video of them charging on my SSG.

    Hi Gary,
    Beautiful work!
    Faraday88.
    Last edited by Faraday88; 07-30-2018 at 09:40 PM. Reason: correction
    'The Magnetic Field is the gatekeeper of the Wheather on the Earth'' - John Bedini.

  3. #3
    Senior Member Yaro1776's Avatar
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    Gary,

    A blast from the past for sure - good to get back to the original roots here. Looks like it is still works just as well as it did in the past. I assume that you are running the SSG in generator mode (another name for radiant mode) in this arrangement.

    Very good of you to take the time to video this setup and to show how it works. Great!

    Thanks
    Yaro

    "The Universe is under no obligation to make sense to you." -Neil Degrasse Tyson

  4. #4
    Hi Yaro,

    Sorry, but you got it backwards. The so called generator mode is actually the common ground mode, not the radiant mode as you stated.

    Quote Originally Posted by Yaro1776 View Post
    Gary,
    ....................................... I assume that you are running the SSG in generator mode (another name for radiant mode) in this arrangement. ...............
    Thanks

    I ran it for about 24 hours in radiant mode and it never got the three batteries in parallel over about 13.6 volts. Then I switched it over to common ground mode, which is also known as generator mode. It slowed down to 200 rpm and pulled a lot more current without raising the voltage any more, so I only ran it a short time this way.

    Then I recharged the run battery with the 10A12 charger for several hours and it wouldn't go above 14.9 volts. Then I charged the other three batteries in parallel with the 10A12 charger and couldn't get them over 14 volts. So I separated them and charged each one individually and they all topped out at 14.9 volts.

    A 315 AH load of unconditioned batteries is apparently too much for either my SSG or 10A12 to fully charge. Once the batteries are reconditioned and fully desulfated it might be a different story. I'll find out when I get them set up in a four battery rotation with a modified SSG running with three and resting one like Peter and RS demonstrated.

    I just received 8 three pole 10 amp breakers to try and replicate RS's "Poor Mans Battery Swapper". Now I just have to modify one of my SSG's and wire it all up!
    Gary Hammond,

  5. #5
    Senior Member Yaro1776's Avatar
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    Gary,

    Thanks for the correction - been away from this way too long. The 10A12 is useful on the 100 Ah Labs and I use it often to keep my battery set topped off with individual charging up to 15.3v. Doing two of these in parallel will still work but it takes a very long time to top them off.

    I have also used these 100Ah batteries in parallel to run my cell system with three solar panels and a Solar Tracker 5 - works well and will pump the voltage to 15.3v on sunny days. I have had this system running for over two years.

    I am a bit skeptical that a single SSG will have enough guts to drive the three 100 Ah Labs, but then you can only give it a shot to see how it plays out. May work perfectly well!

    Thanks for the fun experiment and it will be interesting to all. BTW Peter L. had a battery swapping system (a la Benitez) in operation at this last conference.
    Yaro

    "The Universe is under no obligation to make sense to you." -Neil Degrasse Tyson

  6. #6
    Hi,

    Been working on modifying my old SSG and wiring up a "poor man's split the positive" battery rotation to drive it. I'm wiring everything up with 10 gauge wire. This is the SSG that I changed over to hall triggering a few years back. It's coil will use 4 power strands of 18 gauge wire and a separate strand of 18 gauge wire to harvest the spikes.

    Here's a couple of pics of the progress so far.

    Battery Rotator 1.jpg

    Battery Rotator 2.jpg
    Gary Hammond,

  7. #7
    good going Gary, i bet those breakers were not cheap....

  8. #8
    Hi RS,

    Quote Originally Posted by RS_ View Post
    good going Gary, i bet those breakers were not cheap....
    Thanks. I think I got a deal on old surplus items, they were only $12.99 each plus shipping. I ganged them together in pairs with stainless welding rod through the toggles.
    Gary Hammond,

  9. #9
    even better....

  10. #10
    Hi,

    Got my split the positive battery rotator all wired up last night and tried it out. All the batteries had been fully charged a few days ago and were sitting at 12.8 volts. First thing I did was pull 6AH out of the battery in the charge position with my CBA III. It came back up to about 12.7 volts.

    I ran thru a complete rotation of all four batteries charging each one in turn up to about 13.3 volts. The one I had discharged took over an hour and the others varied from 30 minutes to 45 minutes. The SSG was only pulling 0.75 amps, so getting to a higher charge voltage was going to take a lot longer than I had anticipated. Took the Bradley GT to a car show this morning so didn't get back to the SSG til this afternoon.

    Since the c20 rate of these batteries is 5.25 amps, I decided to add an additional load in parallel with the SSG by hooking a 35 Watt headlamp across it. This brought the current flow thru the batteries up to 3.25 to 3.5 amps depending on which battery was being charged. With the light in the circuit it is taking about 15 minutes to bring each battery up to 13.8 volts except for the one I discharged first. I'm in the process of giving it a longer charge time and stopping it at 13.5 volts.

    I'm hoping to get all of them equalized and topping out at 13.8 volts in 15 minutes. This may take awhile. But it appears, just starting out, that the load is running mostly off the radiant and maybe stealing the surface charge.

    Adding the fast diode between the buses didn't help at all. It actually reduced the size of the radiant spike and lowered the charge rate, so it's running with the buses wired directly together. The batteries must be absorbing all the spike as it doesn't show much at all when scoping the radiant collection winding (2.16 volts without the 30 watt headlamp installed). But the transistors show an 80 volt spike without the headlamp installed, and a 50 volt spike with it.

    Here are some photos of it running.

    Battery Rotator 6.jpg

    Battery Rotator 4.jpg

    Battery Rotator 5.jpg
    Last edited by Gary Hammond; 08-12-2018 at 01:48 PM. Reason: data correction
    Gary Hammond,

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