Solar attic fans [RE-wrenches]

[John Blittersdorf, Cent. VT Solar & Wind]

Hi Wrenches,
   Does anyone have a good source for solar attic fans or large DC fans in 
general.
Also on a totally unrelated topic, has anyone worked on a system with an SW 
inverter feeding another.  I am involved in a system with dual SW4048's 
powered by a 10kw Bergey and 40 Trojan L16's feeding AC to another building 
1200' away with a SW4024 and  16 T105's with 16  60 watt panels.  We are 
trying to limit the power flowing from the larger battery bank.  Currently we 
have the input to the smaller system fed into the AC1 at a constant 3 amps 
with the batteries floating.  I think we are wasting a lot of PV power.  I 
was considering running the AC into the AC2 generator input and wonder if the 
generator setup mode will open and close the input relay as it would with the 
generator even though the power will be constantly available.  Any thoughts 
on this.  Another thought is to just limit the time of day on the AC1 with 
grid usage timer.  This is all new stuff for me as most of my experience is 
with off grid systems with ONE inverter... not 3 in two different locations!

Thanks in advance for any suggestions.

John
CVSolar

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