Hi all, Seems large off-grid systems are happening more frequently. Like most, I spend a lot of time trying to get my clients to lower their loads wherever possible, explaining the benefits of doing so from a financial as well as environmental perspective.
None-the-less, I am currently designing an off-grid system for a primary residence which will likely have about 10kW solar and either one 48 volt 2,400 amphr string or 2 48 volt 1,800 amphr strings. The peak load will be perhaps 8,000 Watts. and consumption of perhaps 25 to 40 kWh/day (summer to winter). The remaining load will be made up by generator, and maybe eventually wind (they wanted to put a vertical access turbine on their "barn"/garage roof, which I am still actively discouraging, but they like the look...). This is the largest off-grid system I have designed to date. I'm leaning toward using 2 SI 5048's, but not having used SI's before, I am wondering about 4 OB VFX3648's (since I'm quite familiar with them). I like the sophistication and options (and I believe better charging efficiency) of the the SI's, but would be interested in feedback from others experience. Thanks as always, Howie -- Howie Michaelson NABCEP Certified Solar PV Installer™ Sun Catcher, LLC Renewable Energy Systems Sales and Service VT Solar & Wind Incentive Program Partner http://www.SunCatcherVT.com (cell) 802-272-0004 (home) 802-439-6096 _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
