net metered system w/generator [RE-wrenches]

[Matt Tritt]

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Sounds like Kirk is going to need an automatic disconnect on the
inverter feed that disconnects when the ATS switches to gen. in. In that
case, the SB's will turn off due to lack of AC availability and cause no
weirdness.

Matt T

-----Original Message-----
From: Jerry Caldwell [mailto:solarcowboy at yahoo.com] 
Sent: Sunday, April 18, 2004 12:48 PM
To: RE-wrenches at topica.com
Subject: Re: net metered system w/generator [RE-wrenches]


 

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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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