Troy, We have designed and installed grid connected net metered PV systems with battery back up for grid outages using OutBack, Xantrex and with SunnyIsland/SunnyBoy. The OutBack install was in fact a whole house UPS system with two OB VFX 3648's powering an efficient home with a "Smart" homeowner who knows how to manage the loads in his house. Of course that could change in the future, but for the last three years it has worked very well. The XW and the Sunny Island systems were designed and installed with critical loads sub panels as recommended by SMA, OutBack, and Xantrex. This is the way to go for all but a handful of homeowners for obvious reasons. I have not worked with smart inverter systems that shed loads, but I would think that the technology is possible but not necessarily practical or cost effective when compared to a simple sub panel with critical loads.
Dave David Palumbo, President Independent Power LLC 462 Solar Way Drive Hyde Park, VT 05655 NABCEP Certified www.independentpowerllc.com << Hi folks, I need an inverter/charger/controller solution for a grid connect house that: 1. grid-connects (net-meters) 2. Islands off of the battery in outages (whole house UPS) 3. Feeds into the whole house breaker, so the whole house is backed up 4. Shuts down less important breakers as needed, if the load for the whole house is over the inverter limit Instead of guessing which breakers are important to put on a battery backed up sub-panel, my client would like the whole house backed up. But of course, can't guarantee that the house won't be drawing too much for a 6000 Watt inverter at any given time. So would like to have the system intelligently remove less important breakers until the system is below the inverter operation wattage. Anyone know of a inverter system that is smart like that? Troy Harvey --------------------- Heliocentric 801-453-9434 tahar...@heliocentric.org >> _______________________________________________ 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
