Nik,

I haven't run into this myself, but...

I think what you have is not really split phase, but two phases, out of the
three available, from the three phase system in the main building. If that is
the case, those legs/phases are 120 electrical degrees apart, rather than the
180 degrees you would have in a split phase system, which is what the the slave
inverter is likely looking for. 

You might want to check with the building superintendent to be sure of the
service setup. Then contact the inverter manu. tech guys to see what they
suggest. Can you connect the inverters in parallel for 120 Volts instead? Are
you using a charge controller or grid tie inverter + battery inverter?

Happy New Year to all as well!

Dick 
Solarwind Electric


--- You wrote:
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!

--- end of quote ---

