<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:arial,helvetica,sans-serif;font-size:10pt">Howie,<br><br>We installed a 10 kW grid tied system w/ a 5048 Sunny Island battery backup system right after they came out. Although it's not off grid, the utility power at the site goes down regularly and the Sunny Island has always kicked in flawlessly. We have our system connected to a WebBox to make sure everything stays healthy. <br><br>Overall, I'd recommend the system although it is expensive. By using two 5048s you'll be able to produce 240 v power without an autoformer which is nice. <br><br>Good luck. -August<br><div> </div>August Goers<br><br><div>Luminalt Energy Corporation<br>4000 Irving Street <br>San Francisco, CA 94122</div><br><br><div>Office: 415.564.7652<br>Mobile: 415.559.1525<br>august@luminalt.com<br>www.luminalt.com<br><div><br></div><div style="font-family:
arial,helvetica,sans-serif; font-size: 10pt;"><br><div style="font-family: arial,helvetica,sans-serif; font-size: 13px;"><font size="2" face="Tahoma"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Howie Michaelson <howie@suncatchervt.com><br><b><span style="font-weight: bold;">To:</span></b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br><b><span style="font-weight: bold;">Sent:</span></b> Wednesday, March 4, 2009 9:47:20 PM<br><b><span style="font-weight: bold;">Subject:</span></b> [RE-wrenches] larger off-grid system inverter preference<br></font><br>
Hi all,<br><br>Seems large off-grid systems are happening more frequently. Like most, I<br>spend a lot of time trying to get my clients to lower their loads wherever<br>possible, explaining the benefits of doing so from a financial as well as<br>environmental perspective.<br><br>None-the-less, I am currently designing an off-grid system for a primary<br>residence which will likely have about 10kW solar and either one 48 volt<br>2,400 amphr string or 2 48 volt 1,800 amphr strings. The peak load will<br>be perhaps 8,000 Watts. and consumption of perhaps 25 to 40 kWh/day<br>(summer to winter). The remaining load will be made up by generator, and<br>maybe eventually wind (they wanted to put a vertical access turbine on<br>their "barn"/garage roof, which I am still actively discouraging, but they<br>like the look...). This is the largest off-grid system I have designed to<br>date.<br><br>I'm leaning toward using 2 SI 5048's, but not
having used SI's before, I<br>am wondering about 4 OB VFX3648's (since I'm quite familiar with them). I<br>like the sophistication and options (and I believe better charging<br>efficiency) of the the SI's, but would be interested in feedback from<br>others experience.<br><br>Thanks as always,<br>Howie<br>-- <br>Howie Michaelson<br>NABCEP Certified Solar PV Installer™<br><br>Sun Catcher, LLC<br>Renewable Energy Systems Sales and Service<br>VT Solar & Wind Incentive Program Partner<br><a href="http://www.SunCatcherVT.com" target="_blank">http://www.SunCatcherVT.com</a><br>(cell) 802-272-0004<br>(home) 802-439-6096<br><br><br><br><br>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a ymailto="mailto:RE-wrenches@lists.re-wrenches.org" href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & settings:<br><a
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