William, 

It's my understanding the SMA Sunny Island inverters do this as well.

Dick Ratico
Solarwind Electric

--- You wrote:
Darryl:

There is a scenario in which problems occur:  If your loads exceed the 
generator capacity, the Outback system will fail.  The Xantrex inverters 
are superior in this scenario in that they will transition to invert mode 
to synchronize with the generator and support the generator as long as the 
batteries will sustain the operation of the inverter.

William Miller


At 12:21 PM 7/21/2010, you wrote:
>The propane and gasoline generators both ar premixed combustion and have a 
>low efficiency at part throttle/ part load.  The Diesel does the best job 
>of maintaining efficency at low load.   The outback can control its 
>charging current to the load limit of the generator.  If the AC loads need 
>more power the Outback can reduce the charging rate until the AC load 
>diminishes.
>
>It takes a lot of words to describe and decide what is the correct 
>generator sizing.
>Darryl
--- end of quote ---

