Hi All, I have done several AC coupled off-grid systems using Sunny Islands and Sunny Boys, but I am now doing one with a dual stacked OB VFX3648 (with a PSX240 on the Inverter out for load balancing) and a SB3000. There is also an existing array that is running through an MX60. What I am wondering about is how folks have set up AC coupled string inverters to best utilize the solar gain while not toasting the batteries. I'm a big fan of the tapering control offered by SMA through the frequency shift of the SI's, but that's not available here. What relay/contactor setup have folks found most efficient and safe? Thanks in advance,
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
