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Forum Index : Windmills : 80-100A Charge Controller Options?
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| MOBI Guru  Joined: 02/12/2012 Location: AustraliaPosts: 819 |
Yes, I agree, but who's talking about contact with air? PURE water could be in an encapsulated environment including the electrodes and all air and other solubles purged. I was only making the point that PURE water (not contaminated water) IS an insulator below a certain voltage in order to suggest that sulphates might do something similar. I think this thread is going ot a bit. David M. |
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wallablack Senior Member  Joined: 10/08/2011 Location: AustraliaPosts: 164 |
From Charge Controlling & Correct Dumping methods to Pulse Charging & Desulphators to conductivity of water. I would never have thought (and this probably goes for many people) that H2O would be a good insulator, there you have it, learn something every day. My opinion of desulfators is varied. My local auto elec is 70 odd and swears by them, absolutely swears by them. Some people think they are like the old "chuck this on your car and you will save 30% fuel" and then Dr. Google throws up various debates. I Foolproof systems do not take into account the ingenuity of fools. |
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| Warpspeed Guru Joined: 09/08/2007 Location: AustraliaPosts: 4406 |
There appear to be three quite different methods of desulphating batteries. 1/ Tip out all the electrolyte and replace with distilled water. Charge the battery on a normal dc charger, and keep measuring the specific gravity. When the SG stops rising, all the sulphate crystals have been dissolved. Replace the now very weak acid solution in the cells with fresh new electrolyte. 2/ Empty the cells and flush out several times with distilled water. Fill the cells with a 20% solution of sodium sulphate. That is 200 grams of NaSO4 per litre of distilled water. Give the cells a very long charge in the usual manner with a dc charger. Dump the sodium sulphate solution and rinse with distilled water. Fill with fresh electrolyte. 3/ Connect up a repetitive inductive discharge system that delivers a very fast risetime CURRENT into the battery. (not a voltage !) This method can be quite slow but many people have reported success. Battery failure can be caused by things other than sulphating, and if that is the case, obviously a desulphating routine is not going to fix it. Cheers, Tony. |
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| MOBI Guru Joined: 02/12/2012 Location: AustraliaPosts: 819 |
Intriguing. Any battery dependent upon its state of charge or sulphatedness will have a value of internal resistance. A badly sulphated battery will likely have a rather high internal resistance, therefore, in order to get a high current (pulse or otherwise) through the battery will require a significant level of voltage. Ohm's Law? I do understand what you are getting at though. David M. |
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| Warpspeed Guru Joined: 09/08/2007 Location: AustraliaPosts: 4406 |
Quite right David. In fact the amplitude of the resultant very short voltage spike can be a fair indication of battery impedance and general health. Cheers, Tony. |
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fillm Guru Joined: 10/02/2007 Location: AustraliaPosts: 730 |
Its a pitty that if you were looking for info on "Battery Management and Desulphators" you probably would never think of reading a thread on "Charge Control & Dump Loads" It's as easy as hitting " New Topic " instead of derailing an existing , that is why so much good info is lost...  PhillM ...Oz Wind Engineering..Wind Turbine Kits 500W - 5000W ~ F&P Dual Kits ~ GOE222Blades- Voltage Control Parts ------- Tower kits |
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| Warpspeed Guru Joined: 09/08/2007 Location: AustraliaPosts: 4406 |
But if you did a search for the word "desulphator" or "battery management" this thread would be included in the list. So what is the problem ? Cheers, Tony. |
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Downwind Guru Joined: 09/09/2009 Location: AustraliaPosts: 2333 |
Its called "Hijacking" a thread! The problem is how a forum topic will show up in searches, but forum waffle dont always get a hit, so for someone who is not a member, thats not doing a forum search will likely not get a hit to TBS, so there is information lost and nill traffic to TBS forum. Unless you start your own thread and not hijack someone elses thread as you have done here, then its very little more than forum waffle from a search engine point of view. Most people turn off on needing to read 4 + pages to find the information they search for, i am one of them. Start your own topic/thread and dont argue why you should be allowed to "hijack" another thread with your off topic debate. Sometimes it just works |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5078 |
Yeah we should start a new thread for the desulphation discussion. Its a interesting topic on its own merits and will get lost in this thread about wallabacks question re charge controllers. Also noted the comment about uploading images. I don't have any issues with members uploading images, its PDF's or ZIP files that cause problems. The forum software does a pretty good job at resizing uploaded images to a decent file size, but it cant do the same with PDF's or Zips. If someone uploads a big PDF, the reader is forced to open it to see it, which means its downloaded from the server. Now the plan I'm on for hosting this web site allows 30 gig of out bound data per month, and the little google ads on the site manage to pay for the plan I'm on. If I go over the 30 gig, I need to move up to another plan that costs much more, and the site will start costing me money. Currently the site downloads 20 to 25 gig a month, so I'm under the limit, so long as we don't have lots of PDF or ZIP files been downloaded. So back on topic, and it would be good to see a new thread started about desulphators. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| wallablack Senior Member Joined: 10/08/2011 Location: AustraliaPosts: 164 |
Back on topic.... 
The reason for the rectifier (DUMP LOAD SIDE) is what? Why can't we dump AC? Not so much "dump" but cause a resistive load to stall the turbine.......extending bearing life etc... The way I see it is that the PL20 has 2 wires (not directly connected) for a "trigger" to activate and de-activate the SSR. Surely this is not uncommon? Foolproof systems do not take into account the ingenuity of fools. |
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