They cannot be sync'ed together as you describe. They can operate independently, each inverter on one 120 vac leg of the 208 three phase. I assume they can't sync because any two legs of the three phase are not the required 180 degrees out of phase.
PS, the Outback GT inverters cannot be wired/sync'ed in parallel for full power at 120 and sell back. The firmware does not support it. Kirk Herander Vermont Solar Engineering 802.863.1202 fax 802.863.7908 VT RE Incentive Program Partner NYSERDA Incentive-eligible Partner NABCEPTM Certified Installer From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Nik Ponzio Sent: Thursday, December 31, 2009 4:15 PM To: RE-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] dual stacked inverters on 208V service Hi Gang, I have a problem. We are installing a gridtie PV system with 2 battery-based inverters for 240V. The service coming in to the condo is 120/208 split-phase fed from 3-phase 208 in main building. The master inverter pickups up L1 but the slave inverter will not sync. What am I missing? Thanks and Happy New Year to all!
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