Travis - the startup speed of these Air-X generators is around 10mph... that doesn't mean it starts generating power at 10mph - it just means it starts turning.
They did just release some consumer 1000watt wind generators that have a start-up speed around 7mph - they are much more efficient and their power curve is a LOT higher at lower RPMs. JohnnyO ----- Original Message ----- From: Travis Johnson To: WISPA General List Sent: Monday, March 17, 2008 8:21 PM Subject: Re: [WISPA] Off Grid System Design Comments. I agree. Wind turbines really only produce about 50% of what they claim (even at full wind speed). You will need 4 or 6 of that size wind turbine to keep things running. We had a site that was on a 9500ft mountaintop that showed a 15mph wind average (over the entire year). We put up two 400 watt turbines and had 10 or 12 batteries (100ah). We only had 5 radios total (trango) and a small 5 port 12v switch. The site would stay up for about 3-4 days before we had to go start the generator. I think our total draw was under 80 watts for everything. You need to take a look at the Bergey wind turbines. They are expensive, but they work really well. However, you can NOT mount them on the top of a Rohn type tower... their mounting pipe has to be exact, and if it's off by even 1/8", the whole thing will eventually vibrate itself apart. Spend the extra $500 and buy their recommended mounting tower system. Travis Microserv JohnnyO wrote: Cameron - unless you have CONSTANT wind, you are going to be seriously underpowered. JohnnyO ----- Original Message ----- From: <[EMAIL PROTECTED]> To: "WISPA General List" <[email protected]> Sent: Monday, March 17, 2008 6:22 PM Subject: Re: [WISPA] Off Grid System Design Comments. We are installing a new tower very soon (in the next couple weeks) that will be run completely off Wind power with a 400-watt wind turbine. Of course we will have 6 105 amp hour batteries. Our draw at one of our popular sites is under 375 watts. This using a PC-Based MikroTik/ HP Procurve 2524, 6 Alvarion B NET Backhauls, 2 Alvarion VL-AU's, 1 Trango 900 Sector. We switched some hardware in the MikroTik routers mostly the newer low powered AMD cpu's and that made a hugh difference and going from the HP procurve 2424m to a 2524 which cut the wattage from 90 watts to about 25 watts. The Alvarion Units use about 200 watts total and the trango is like 13 watts or so, (been a while since I checked them). The mikrotik router is uing 60-75 watts. All in all, not to shabby as far as power consumption. -Cameron I wanted to get input from the WISPA list about a complete design for a off grid base station design base on a dual and quad radio system. We have been looking into this and have come up with a design using both wind and solar power that will keep a unit up and running 24/7/365. The idea is to have a complete package design so the base stations can be installed anywhere, but in order to keep the costs low it would be base on a max 48Watt design. Questions: 1. Is this something WISP would want in the USA, and would find useful? 2. Would you like this in a single package or parts (where a package would have a 1 year warrantee and parts would not) 3. What are you finding the power needs are at a typical WPOP? 4. Other Comments? -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! 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