From: dannyb@panix.com   
      
   Wondering if the following device is off-the-shelf   
   at some not too absurd cost:   
      
   I'm looking for an inverter/power supply that   
   would have to incoming feeds. The first would   
   be a connection to a battery bank; the second   
   to a grid utility (a wall plug...)   
      
   Concept: I'd have a solar charged battery   
   array. As long as the batteries were reasonably   
   "full", the inverter would draw power from   
   them and feed it out the outlets.   
      
   Once the batteries dropped to (for illustration)   
   about 30 percent, the inverter would switch   
   to the grid.   
      
   This would allow us to ease into the solar   
   option, starting off with, say, enough panels   
   and batteries to provide ten percent of   
   our demand. Six months from now we could   
   pick up another couple of panels and get   
   to 25 percent. (numbers for illustration).   
      
   Any such beast exist?   
      
   Thanks   
      
      
   --   
   _____________________________________________________   
   Knowledge may be power, but communications is the key   
   		     dannyb@panix.com   
   [to foil spammers, my address has been double rot-13 encoded]   
      
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