I have never been able to get my generators to connect w/ a grid tie inverter. The Kohler 20kW Isochronous generator electronic AVR doesn't nor does the smaller Onan, Honda or even I had a customer w/ 125kW & the SMA wouldn't latch on despite the quality of power tiring to connect w/o a load. I too was told by SMA to connect to the line side of the ATS, but that doesn't mean that I haven't seen connection to the load side & have seen no ill effects from this type of connection, just inverter not latching on.
-----Original Message----- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Drake Chamberlin Sent: Wednesday, March 03, 2010 9:41 AM To: RE-wrenches Subject: Re: [RE-wrenches] Generators and Grid-tie Systems The issue of what will or will not hurt an inverter, when connected to a generator, does not seem to be resolved. The fail safe method, of course, is to connect to the line side of the transfer switch. Other than that, there are varied views. There are systems in operation that intentionally AC couple generators to on grid inverters. A post on the List had linked to an article about such a system, but so far I can't find the information. Has anyone else had problems with isolation relays? This was a recommended method that didn't work for me. Drake Chamberlin Athens Electric OH License 44810 CO License 3773 NABCEP TM Certified PV Installer Office - 740-448-7328 Mobile - 740-856-9648
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