A common misconception when shopping for wind powered generator; the power rating that the manufacturer claims for that unit, is not the power you’ll enjoy at any wind speed….
NO, no it’s not! I can’t remember how many times I’ve had a conversation about this. I guess some folks just don’t pay enough attention to the details in the product description of a PMA they plan to buy. Below is a typical email conversation I had with a potential customer. Now I could have told him anything he wanted to hear in order to make a sale, but that’s not how I do business.
The name has been changed to protect his anonymity.
On 2/4/2019 7:46 PM, Rambo Johnson wrote:
I would like to know how much you would make a wind turbine for me, I might ask you to make one or two plus 4 additional blades
The reason is, in case of damage I will have extra blades.
I intend to use this alternator, unless if you have a better suggestion for a 3000 Watts alternator
On 2/6/2019 at 2:15 PM Andrew Sansom wrote:
Because of the way automotive alternator style case mounting holes are designed, I would recommend using that particular PMA design as a horizontal wind turbine only. You should also use the blades Hornetwind recommends with it in order to achieve the results they claim you will have. Something I noticed in that ad, it looks like they say the peak output of 3000 watts happens at 2700 RPM. It is not possible for a VAWT to turn that fast.
Another thing to think about, a vertical axis turbine will work best if the PMA has three or more mounting points to keep it standing strong in high wind and storms. Let me know if you find another PMA to consider.
Thanks for asking,
On 2/6/2019 5:20 PM, Rambo Johnson wrote:
Thanks for the tip!
From your experience, what generator that has a great output of electricity you believe will work best with the VAWT
On 2/6/2019 at 8:43 PM Andrew Sansom wrote:
PMA’s are expensive, so I’ve only purchased three to experiment with over the years: A WindBlue low wind PMA (automotive alternator body), a 48 volt Freedom PMA and a 48/96 volt Freedom II from Missouri Wind and Solar. Out of those three, I like the Freedom II best because it has a dual core which allows me to run the power from the two cores in series doubling the voltage output. Both the Freedom and Freedom II have four mounting points. This is NOT a high power system, but it produces enough power to keep my six, six volt batteries charged with only a 5 mph breeze. Power output consistency at average wind speed is what I’m trying to accomplish with my VAWT design. Not high power output.
I’ve been planning to purchase a ebay.com/itm/WIND-GENERATOR-WHITE-LIGHTNING-48V-1000W-PERMANENT-MAGNET-GENERATOR-HURRICANE/ once I have a bit of cash to gamble with. This one boasts a thousand watts peak output, but there again high RPM is required to reach that peak.
You should think carefully about how much power you truly require. If you’re going to need an average or consistent 3000 watts from a wind turbine, you’re going to need a much BIGGER system than I can produce.
Take Care, Andrew
End of conversation
I haven’t heard from him again… I’d like folks to understand, the Little Shop in Texas is a very little shop. It’s more of a dream than it is a business. Ideas are plenty with me, and I have many plans for future projects. Unfortunately the inspiration for these inventive designs is my lack of income and my need to survive. It’s also the lack of income that prevents me from completing so many of my experiments.
That said, the Stealth VAWT works well enough to produce around 70 watts of power at average wind speeds of 5 to 8 mph. Have no misconception, it will not run your house, but it will charge your batteries.