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frankineto
Starting Member
United Kingdom
17 Posts |
 Posted - 10/09/2007 : 13:07:31
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hi again .
a quick question about batteries .
if I wire up 2 x 6 v batteries in parallel and charge them via the wind turbine , would this charge the batteries at 6 volts with minumal wind power?
And withdrawing power from the batteries wiring it in series so as to get a 12 volt output - would it not make sense to use 2 x 6 volt batteries rather than the usual 12 volt .
thanks
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ll81
Junior Member
124 Posts |
Posted - 10/09/2007 : 16:30:32
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There was a discussion on this the other week, look at he post titled ideas for dynohub charging a couple of headings down the page.
Cheers, Liam
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BushWhacker
Junior Member
Canada
329 Posts |
Posted - 10/09/2007 : 16:31:47
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If you physically are moving the battery cables from charging position (parallel) to use position (series), you will have a lower cutin speed for your turbine. This will allow you to store the electricity you generate between 6.5 and 13 volts output. The wisdom of this move would depends on how much of the time your turbine produces 6.5 to 13 volts as opposed to 13+ volts.
There are some better minds than mine on here and perhaps someone can come up with a design with a knife switch or two that would allow you to make the change without undoing battery cables.
As for 2x6 volt being better than 2x12 volt, in RV (caravan) applications 2x6volt "golf cart" batteries have considerably more capacity than 2x12volt "RV" (leisure?) batteries. The golf cart batteries are also less prone to damage from deep discharge.
Hope this helps,
BW
Everything should be made as simple as possible, but not one bit simpler. - Albert Einstein |
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gotwind
Forum Admin
United Kingdom
949 Posts |
Posted - 10/09/2007 : 16:54:35
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I've considered this frankineto, especially with the dynohub wind generators
You could charge two 6v batteries in parrelel - but you would have to connect them in series for 12v applications.
However you can't have them connected up in parrelel and series at the same time obviously.
The Futures Green - Getwind of it. |
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frankineto
Starting Member
United Kingdom
17 Posts |
Posted - 10/09/2007 : 20:41:28
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WELL , very interesting but it is possible to rig up .
does the amperage stay the same.
say on a 6 volt battery - is rated at 100 amp - would that mean that
2 x 6 volt batteries in series would produce 200 amps or is that wishful thinking ?
thanks for all the answers
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fungus
Moderator
299 Posts |
Posted - 10/09/2007 : 21:39:00
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| 2*6v 100ah batteries in parallel would be 200ah, in series they would be 100ah but at 12v. |
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fungus
Moderator
299 Posts |
Posted - 10/09/2007 : 21:40:29
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| *hoists up member status to next level with the 50th post* ;-) |
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llerdnaj
Starting Member
United Kingdom
16 Posts |
Posted - 10/09/2007 : 22:11:50
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Well done fungus. God bless us all who think that doing their bit to save the planet is a cool thing and not something else's problem. I salute Gotwind. Keep it up. Cheers llerdnaj.
Scoundrel |
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Peter Williams
New Member
United Kingdom
54 Posts |
Posted - 11/09/2007 : 16:37:41
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| Its a shame they don't do a 6v power inverter that would allow you to use a battery charger (yes I know there not efficient) to charge your 12v batteries. This would suit me as I could be charging the 6v during the day and use it on the 12v I take with me to work when I get home. |
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BushWhacker
Junior Member
Canada
329 Posts |
Posted - 12/09/2007 : 06:01:55
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Peter, would two six volt batteries a little bigger than half the size of you 12 volt be a big hassle at work?
You could find/make a case for each pair of six volt batteries. With this set up you could run 2 sets of 2 six volt batteries in two separate cases (two in each case).
If you attached clamps (booster cable style) to the battery end of your chargers, and made up some really short (18"?) booster cables that would fit inside your cases, switching the batteries from parallel to series would only take a few seconds. You could go out after work (I would suggest after), take the pair of charged batteries off of your turbine, and replace them with the set you last used.
If you made a routine of this switch at about the same time each day, you would have 24 hours of wind charge time for each recharge cycle. A quick voltage check with a VOM (12.6 to 12.8 volts) would tell you if the "recharged" set of batteries was up to snuff. If they are not fully charged you could put a trickle charger on them overnight to make sure they would get you through the next day. The battery switch, check, and charger hookup each night should take no more than 2 or 3 minutes.
I know its not a perfect solution but it's the best I could come up with on short notice.
Good luck!
BW
Everything should be made as simple as possible, but not one bit simpler. - Albert Einstein |
Edited by - BushWhacker on 12/09/2007 06:25:32 |
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Peter Williams
New Member
United Kingdom
54 Posts |
Posted - 12/09/2007 : 18:22:58
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Its probably a better idea than me going out at midnight and swapping my trickle charger over from battery to battery. The only thing is I need 85amp/hr from each battery (my window cleaning pumps use 7amps)and I've yet to see any like that in the UK.
Anybody know of a suitable supplier |
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BushWhacker
Junior Member
Canada
329 Posts |
Posted - 13/09/2007 : 00:14:30
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Peter I found a battery that looks great on the surface, but rest assured they are not on the low end of the price range. The brand is Optima, and they are available in Europe. The 6 volt batteries are intended for a automotive application but weigh only 18.4 lbs each. Portable huh?
More info here... http://tinyurl.com/27rxvr
Good luck!
BW
Everything should be made as simple as possible, but not one bit simpler. - Albert Einstein |
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frankineto
Starting Member
United Kingdom
17 Posts |
Posted - 13/09/2007 : 23:37:40
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i have found this on a popular site .
would it make sense that you could still charge the batteries and withdraw power as they are rigged via series and parralel ?
http://www.otherpower.com/otherpower_battery_wiring.html
please look at series and parallel rig which is about 2/3 way down .
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Topic |
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BATTERY QUESTION ?
