Gudcraft WG300 I hooked it up to a new partially discharged 12 volt deep cycle battery at 12.74 VDC.It's been hooked up for two weeks now and the battery voltage hasn't raised even a hundredth of a volt yet.
Not that the turbine hasn't been spinning, it has! It spins in a very mild wind; it just doesn't produce 12 volts until it is spinning so fast that you can't see the blades. I've had 15 MPH wind gusts with no charging. Tests I have run indicate it has to be spinning 4 to 5 revolutions per second to output 10 VDC.
That's about 250 RPM, and moving pretty quickly, above that speed the black dot Indicator I put on the center hub begins to blur and speed measurement becomes difficult. Fearing the unit was defective I took all the blades off and mounted it and spun it manually as fast as I could and managed to get it to 12 volts after a few tries, and finally up to 17 volts for a moment. So it is capable of putting out the proper voltage to charge a battery. Since I was only able to get it going that fast for a moment I was unable to measure the current output.
Today it's been windy all day and it's been spinning most of the time, but there has been no charging yet, save your money.
Update, today we had sustained 30 MPH winds with gusts up to 50MPH and the wind turbine was able to charge a single deep cycle battery from 12.75 volts up to 13.25 volts with a highest current of 0.7 amps. Since I'm not likely so see many days with these kind of winds, it falls very short of it's rated 300 watts or 25 amps. I still wouldn't recommend it to anyone. The wind speed was checked with a Lacross weather station anemometer. It rarely puts out 12 volts and so far never more than 1 amp. Actually today is the first time I was able to measure any current output at all. It's moving so fast today, I can't see the blades, they are just a blur.
We tried two different units with the same result.
We connected it to an oscilloscope and we see a full wave rectified sine wave output with a peak voltage of 12.5V. So it does not appear to have bulk, absorption, float control which is really important if you want the battery to last for any length of time. I think the "charge controller" is noting more than a full wave retifier which is not going to maximize the battery life and/or fully charge the battery.
Might work to charge a 6V battery, but not a 12V battery. Even if you only have a 6V battery, you will still need a charge controller as connecting directly will overcharge the battery. Such a controller would necessarily have to deal with the voltage this device generates so it would likely have to be a custom one.
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the wind generator is werking fine but laks the abilaty to charge more than two baterys at a time at low wind speeds it only poots out six volts and at higher wind speed it reches about ten volts i have yet to see it poot out 12V or moreI ordered this item to get us started on alternative energy. I/We already have Solar and during a "Major League" power outage last summer in San Diego all the way to Arizona and Mexico. We were the only one's with lights and refrigerator. This item does require alot of knowledge and man power. So if you lack these skills I wouldn't recommend it. But to those that do I'd highly recommend it. The sun doesn't shine at night and the 3 deep cycle batteries only last approx: 8 hours as I found out that night and there was no wind so we just made it through it but only had 3 small lights and the refrigerator.Good luck and if everyone did they're little part we might be able to put a dent into our "Energy Crisis"Want ALEKO® WG300 12-Volt 6-Blade 300 Watt Wind Generator With Charge Controller Discount?
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