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 Post subject: Midwest Renewable Energy Fair
PostPosted: Mon Jun 14, 2010 10:06 am 

Joined: Sun Feb 14, 2010 4:51 pm
Posts: 12
MREA Energy Fair this weekend near Steven's Point. Lots of workshops, exhibits, demo's . They run a bus up from Madison and volunteer opportunities to get in free.
Join us for the 21st Annual Energy Fair June 18-20, 2010 at ReNew the Earth Institute, 7558 Deer Rd., Custer, WI.

Friday, June 18 9 am to 7 pm
Saturday, June 19 9 am to 7 pm
Sunday, June 20 9 am to 5 pm

See the website for more details
http://www.the-mrea.org/fair_workshops.php


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 Post subject: Re: Midwest Renewable Energy Fair
PostPosted: Tue Jun 15, 2010 11:57 pm 
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Joined: Sun Feb 14, 2010 9:29 pm
Posts: 84
Location: Downtown/Campus - Madison, WI
You're going to ride the electric bicycle up, right Larry? O:-)


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 Post subject: Re: Midwest Renewable Energy Fair
PostPosted: Wed Jun 16, 2010 7:54 am 

Joined: Sun Feb 14, 2010 4:51 pm
Posts: 12
Waterppk wrote:
You're going to ride the electric bicycle up, right Larry? O:-)


Still working on the hybrid model !


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 Post subject: Re: Midwest Renewable Energy Fair
PostPosted: Mon Jun 21, 2010 8:05 am 
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Joined: Sun Feb 14, 2010 9:29 pm
Posts: 84
Location: Downtown/Campus - Madison, WI
How'd the fair go? Looks like they had a lot there :-)


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 Post subject: Re: Midwest Renewable Energy Fair
PostPosted: Mon Jun 21, 2010 7:04 pm 

Joined: Sun Feb 14, 2010 4:51 pm
Posts: 12
The MREA Energy fair was great as usual.
Photovoltaic panels are down in price again ! Kyocera 135 watt new panels selling for $2.30 a watt. I heard that part of this is due to Chinese panels flooding the market as well as new automated robot manufacturing plants coming on line. But if silicone supply starts getting used up again the price might rise. So great time to buy now. The low cost means that there isn't much incentive to consider a costly tracker when you can just purchase extra panels to make up the energy production difference.

I saw an interesting hacker mobile - a Geo Metro that was retrofitted with the motor out of an old forklift. Someone said he only spent $1300 on parts to electrify this car.

I went to a couple workshops on solar electric systems. It is quite a bit different from the old days when we just got a few panels, a simple controller, and some deep cycle batteries. Now the common installation is a large number of photovoltaic panels put in series for 300 or 400 volts running into grid tie inverters. No batteries makes it less costly and more efficient. I was told that some of the power companies now no longer require the costly outdoor switch due to the confidence in the new inverters - they will not produce power unless they sense power on the grid. When the first were introduced there was a fear that lineman would get electrocuted if they were working lines during an outage and solar system was feeding power in from a home somewhere.

Midnight solar is supposed to introduce a new off grid MPPT controller that run at a higher voltage as well as higher output - but it will also be able to track wind and hydro voltages. Other controller manucturers say they are having trouble getting enough FET's to manufacture their controllers because they are the same type used by the automotive industry - which controls the amount produced by the manufacturers.

These are a few of the interesting things that come to mind.


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