net metered system w/generator [RE-wrenches]

[Jerry Caldwell]

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Hi Kirk,

I don't have any experience using Sunnyboys in backup
power setups, but how are you going to keep the Kohler
generator from backfeeding to the grid?  Is it smart
enough to limit output if the power cannot be absorbed
anywhere?

Jerry Caldwell
Light Energy Systems

--- Kirk Herander <kirk at vtsolar.com> wrote:

===========================================================
> 
> Group,
> 
> I'm desighing a system with 10 kw peak of pv and
> multiple Sunnyboys. The
> owner has an existing 30 kw Kohler generator w/ ATS
> that transfers the main
> panel to generator during a power failure. What's
> the best way to disconnect
> the backfed Sunnyboy circuits from the panel during
> a power failure? I don't
> want the Sunnyboys to think generator power is the
> grid and refuse to
> disconnect as a result, attempting to put solar AC
> into the panel &
> generator. There are easy contactor / relay senarios
> of course, but do any
> of you have a preferred method? or is the Sunnyboy
> smart enough to limit
> output if the power cannot be "absorbed" anywhere?
> 
> thanks for your help, Kirk
> 
> Vermont Solar Engineering
> Kirk Herander


	
		
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