windgen.org vawt discussion

Project wrote:

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electrondady1 wrote:

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you may want to change your handle if you post hobby vawt
'cause they have a history of chewing on people interested in vertical mills but
if you want to learn alot about battery charging check out ;

Fieldlines.com || Make your electricity from scratch!

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Ain't that the truth!!!!

Jerry

 

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Yes, but they do, on occasion, seem to respond well to things that really work, and work well.  I'll be posting my working VAWT builds there, after I get some hard numbers.

They'll listen... after all, I bought some of their overpriced magnets before I found these folks

http://www.magnet4less.com/

Turtle

 

electrondady1 wrote:

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you may want to change your handle if you post hobby vawt
'cause they have a history of chewing on people interested in vertical mills but
if you want to learn alot about battery charging check out ;

Fieldlines.com || Make your electricity from scratch!

---

Ain't that the truth!!!!

Jerry

 

Ive submitted the question to Trojon Battery since they have an RE Series battery specifically designed for a renewable energy system.

Ive been to that website before and what I want to know is where they go fishing.

you may want to change your handle if you post hobby vawt
'cause they have a history of chewing on people interested in vertical mills but
if you want to learn alot about battery charging check out ;

Fieldlines.com || Make your electricity from scratch!

In order to increase the lifespan of the batteries a new design of contol system may be in order.

What would be the optimum shutoff voltage for a battery system? I may need to contact the manufacturers to get specific information on a specific series of battery. Im always a bit leary to get information from the mfg because they have a dog in the race and may stretch the operational envelop.

Hobby VAWT wrote:

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Discharge: Do inverters shutdown when the battery voltage falls below a certain level?

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They do, but too late.   I have a couple inverters from places like WalMart, etc.  They will shut off if the battery voltage drops to 10v.  But when a Battery hits 10v you are already doing damage to it.  Really you shouldn't drop much below 12v if you aren't pulling much current.

 

I have an xantrex 2412 inverter that cost aroung $1200. It will shut down if the battery bank gets down  to low on the voltage. It also has an equalization mode that will throw a heavy charge into the batteries to mix up the acid and desulfate the plates. It also will kick in to charge up automatically when the batteries get to a certain point. You have to set the battery bank AH capacity though. I also have a charge controller hooked up for the wind generator. I know what you mean by your vehicle battery lasting forever but they are probably almost never run below 80 or 90 percent of charge If even that low. As far as disconnecting in low wind I don't see any reason to do that. It shouldn't drain anything because the rectifier should block anything from going back out.

-- Edited by wiboater on Friday 22nd of January 2010 06:43:16 PM

Background: I have an RV Park/Campground in Colorado and I see a ton of problems with batteries. At the end of fall I pull batteries out of most of my equipment and place them on a rack in a place that doesn't freeze then I make sure they stay fully charged. Short of that I only get about 2 years out of a battery. I also have a Ford Th!nk Neighbor which is a neighborhood electric vehicle that was built by the Ford Motor company and again I need to replace at least one battery every year.

The other end of the spectrum is that my car batteries last for years virtually ignored.

My point is that batteries are expensive and should last for at least 5 years.

Now the system we are using, if not properly controlled can over-charge and/or fully deplete a battery. Both of these conditions shorten a battery's life. If I break the problem into 2 phases (Charge and Discharge) I hope to solve both of my problems.

Charge: Is there a charge controller available that will:
1. Fully charge the battery system?
2. Not over-charge the battery system?
3. Condition a fully charged battery system to reduce sulfate accumulation?
4. Disconnect the input line to the battery system in an under-voltage condition. (low wind = low voltage)?

Discharge: Do inverters shutdown when the battery voltage falls below a certain level?