Right, I forgot about FL humiditity... We don't have that here except during Monsoon...and even that hasn't been enough to get us to turn on the A/C yet...
If they do a grid inter-tie and battery, they don't have to share the batteries with the neighborhood. They would have to pay more for the inverter though. The switch-hitters that allow inter-tie and battery are more expensive than the inter-tie only inverters... I just asked my solar guy which inverters our local power company will subsidize and he sent me these links: "For the battery backup, the inverter currently approved by TEP is the SMA Sunny Island. Information at http://www.sma-america.com/solar-technology/products/island-grids/battery-inverters/index.html. The advantage of this inverter is that it normally acts as a grid-tie inverter, and switches to batteries only when needed. <That's sort of what we want -Chet> There are a couple of other inverters that may soon qualify for use with TEP, The OutBack inverters http://www.outbackpower.com/grid_interactive.htm, and the Xantrex XW http://www.xantrex.com/web/id/246/p/1/pt/25/product.asp. Using one of these inverters is really the best way to go with a battery backup/gridtie system. It becomes kind of a pain to set up charge controllers and transfer switches, since battery voltages are typically 48 volts max, and gridtie array voltages are 300-600." (TEP = Tucson Electric Power) FYI, he's recommending the BP SX170 panels (12-20 of them) mounted on the roof at an angle to get the best sun... http://www.bp.com/extendedgenericarticle.do?categoryId=3050530&contentId=3060138 Cheers; Pete Theisen wrote: > On Wednesday 01 August 2007 12:42, Chet Gardiner wrote: > <snip> > >> Ask them if they REALLY need A/C -- that's a HUGE energy hog. >> > > Hi Chet! > > Thanks for the link. Here in Sarasota Florida in the summer, when the unit > would be needed, they would really need AC. People didn't even live here in > any numbers until AC was available. > > Many homes do not have heat, but all have AC. I have gone many winters > without > turning on the heat, but to try the summer without AC, why, you use as much > electricity with all the fans you have running pointed right at you! > > Too bad there is no propane AC. > > If they do a grid inter-tie, do they have to carry their whole neighborhood > on > their solar/batteries if the grid goes down? > _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://leafe.com/mailman/listinfo/profox OT-free version of this list: http://leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/[EMAIL PROTECTED] ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
