Grid sell with Outback, solar,and generator [RE-wrenches]
Darryl Thayer
daryl_solar at yahoo.com
Wed Apr 25 15:17:34 PDT 2007
Hi Jeff and List
I sent a response this morning I think, It has not
shown up yet. But I have a similar opportunity for an
installation that i am in negotiation on. I am
planning to use the "DT-Kluge" where I use the
auto-transformer to step down the generator rectifier
and charge controller. I have a few twists I am going
to try on this one.
I will inform you as to how it turns out, but the
questions are
1) are you 48 volt?
2) is it necessary to auto start the generator?
3) is it necessary to generator cycle, IE generator
supplying load then back to battery and inverter then
back to generator again OR once the generator starts
to let it run until grid returns?
4) is it OK to have the generator pick up just the
critical circuits panel OR do you want to pick up the
entire main load panel? OR do you want the generator
to pick up the critical load and generator panel?
--- Jeff Yago <jryago at netscape.com> wrote:
>
> I know this thread has just about been beat to
> death, but I wanted to see if I could summarize
> everyones thoughts as we are getting ready to
> install this exact same system.
>
> Battery-based Outback Grid-tie Inverter system with
> about 2 kW solar and a 12 kW backup generator.
> Client wants to sell any excess solar power as they
> are gone most of the week, but area has lots of
> power outages so generator backup is important.
> Since no AC1 and AC2 inputs, the easiest route is to
> set up inverter as grid-tie, and use any excess
> solar for net metering. Install a standard AC
> generator transfer switch ahead of inverter and its
> emergency panel loads.
>
> However, as everyone has already pointed out, the
> Outback will not handle this change properly without
> being told the input power supply is now a generator
> and not the grid. How big a deal is this
> change-over for the client if they have a Mate? Can
> this change-over be simplified or pre-programmed to
> only require a single command? What is easiest
> program settings to stay with that reduces these
> control issues if the generator will only be used
> during an extended power outage?
>
> Thanks,
>
> Jeff Yago
>
>
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