Generwreck auto start [RE-wrenches]

[Drake Chamberlin]

The problem I encounter with auto starting the Generac, by bypassing the 
transfer switch and normal controls, is that the battery charger is 
disconnected.  Normally a 240 volt feed comes from which ever side of 
the transfer switch is energized, to feed the battery charger.  

There are several possible solutions.  In a backup system I'm working on 
now, that has a large array and grid power, that needs the transfer 
switch to feed either the grid or the generator into the Sunny Islands, 
I've used a different method. 

The sensor and battery charging wires are removed from the 240 volt grid 
feed terminals, and fed through the protected loads panel. This circuit 
is broken by the generator starting relay on the master Sunny Island.  
This is somewhat simplified, since another relay needs to open as the SI 
relay closes.

This takes more power to operate, but the starter battery will stay 
charged, and the generator will auto start on inverter commands.  The 
transfer switch works normally.

This would be less feasible with a small, off-grid system.  The best 
solution is to get an Onan, or possibly a Coleman.  

Drake 


> What I have done for off grid use is to cut 1 wire going to the AUTO 
> side of the switch (a DPDT), install a 12 volt relay n/o contacts in 
> series with that wire, then leave the switch in AUTO. When the Outback 
> calls for generator, the relay closes and the generator takes over like 
> you put it in AUTO. This solution leaves the MAN and OFF position  for 
> local control. It has worked for me on many Generacs. Of course, this 
> will not work with line voltage present.
> 
> 
> 
> Larry Crutcher
> Starlight Solar
> Yuma, AZ
> Renewable Energy Products Powered by STARLIGHT


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