george borges wrote: »
They can't advertise something like that if it is not true.
BB. wrote: »
My family lives in an area with areas known for high/steady winds (SF Bay Area)... We have a very popular hang gliding area on the coast, and lots of wind farms on the eastern hills of the SF Bay Area (California)--so, I do not deny that there are areas where there is sufficient wind available to make good power.
Other than the issue that wind is highly variable (season, location, and local obstructions/wind patterns)--the other problem has been finding a good quality/reliable "home sized" wind turbine and any installation with power output numbers and a history of more than a few months or year or so...
Your site appears to be quite windy--so, roughly, how much to install?, How has your installation been preforming for you? How long has it been running, how many kWhours per month has the system been generating since the install? How are you doing maintenance (tilt tower?) and how often does the system need routine maintenance?
Given that the W-100 (PDF) appears to be rated (very approximately) around 200 kWhrs per month at 18 MPH average wind (39 kph?) (plus losses for batteries, inverters, and loss opportunity of charge once the battery banks are full)--I would be interested in how much useful power you actually pull out of the system (kWhr meter).
I am very happy to hear how well it works for you.
mike90045 wrote: »
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BB. wrote: »
If you wish--please feel free to start a thread about your own system experiences... I am sure it will be interesting for us all.
Regarding your batteries and inverter...
1) Do you have a good handle on the "health" of your batteries. For the typical flooded (wet) cell deep cycle storage battery, you want to keep it from going below 50% state of charge--and ideally, once it drops below 75% state of charge (25% discharge), you will want to start recharging it rather quickly (in hours or day)... If the batteries sit below 75% state of charge, the sulfates begin to harden and reduce the life/capacity of the batteries (if no wind/sun, using a generator to get some charge in the battery would be a good thing).
Using a battery meter, hydrometer, or an accurate DVM would help ensure that your batteries last a long time.
2) You have three 12 volt batteries--so I assume you are probably using a 12 volt inverter... If you are powering large loads--you will probably want to get a 24 or 48 vdc inverter. Even pulling just ~1,000 watts, you are pulling 100 amps (at 12 volts) from your battery (and through your wiring system).
Obviously, you are still building up your system--so this are things for the future.
WisJim wrote: »
Proven and ARE make good reliable machines in the 2.5kw size, but they aren't cheap. My 1940s vintage 2.5kw Jacobs is running fine, after it was rebuilt in 1978 or so before I started using it, and then we replace the blades in 1998 when we moved, took it down, and reinstalled it. The Proven and ARE machines should have similar longevity. Some other bigger machines are well built, too.
jacobs wrote: »
I personally know of three 2.5kw Proven installations. Two just installed in the last 3 months and one over a year ago that has survived over 80 mpg gusts. All of them have been reliable so far BUT occasionally sound like a helicopter flying overhead. I'm not impressed with their plastic blades. The old pre REA Jacobs machines are quiet, WHY can't current manufactures make a quiet machine?
icarus wrote: »
Give me a five year reliability test. Any hardware that lives in the rain, snow ice, along with the life loads that windmills have to survive, plus servicing hardware that it 10s of feet off the ground if not 100's. I remain skeptical of long term reliability.
PS From what I remember of the the old Jacobs machines is that they were heavy, cast iron huge machines that had much smaller output per pound.