[RE-wrenches] dual stacked inverters on 208V service

[Kirk Herander, VSE]

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-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Nik Ponzio
Sent: Thursday, December 31, 2009 4:15 PM
To: RE-wrenches at 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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