As mentioned before, many of our clients want battery backup with their solar, but are not off-grid. They also want a generator so battery banks can be down-sized. For many of these applications we use a SunnyBoy at the array when the aray is located hundreds of feet from house, and usually a Xantrex battery based inverter at the house, and backfeed the solar inverter into the inverter's emergency loads panel. We pass this backfeed through a heavy duty relay controlled to open on high battery voltage. Yes, SunnyBoy with SunnyIsland is better match, but since one is 120 V and the other is 240V that means adding transformers or using two SunnyIslands.
Here is the issue - The SunnyBoy is working perfectly when grid power is passing back to it through the backfeed connection. However, when this system operating off-grid when the grid is lost, the SunnyBoy "sees" the fake grid power coming from the Xantrex which it shows on L1 and L2 readings, but it is staying in the waiting mode and will not connect. No errors, just acts like grid a morning startup and stays that way. I have had problems before with Fronius doing this and they have provided secret codes to open up the program settings for the grid which solves the problem when grid power is poor quality typical at end of line. Is this solution possible with SunnyBoy inverters, or is there something else going on. Have not had this problem on other AC coupled systems using the same combination of inverters. Thanks, Jeff Yago _____________________________________________________________ Netscape. Just the Net You Need. _______________________________________________ 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
