[RE-wrenches] grid tied systems with seperate generator back up

Jerry Shafer jerrysgarage01 at gmail.com
Fri Feb 5 10:45:21 PST 2016


Wrenches
My best solution is connect the pv unstream of the tranfer switch, if that
is not an option install a contactor in the pv AC side output and connect
that upstream of the genny, you can also connect the supply power to the
genny side. Either way you look at dont let the PV and genny play together.
Jerry
On Feb 5, 2016 8:33 AM, "Daniel Tittmann" <daniel at greenwired.com> wrote:

> Esteemed colleagues-
>
> We are finding more and more clients with existing utility back up
> generators that are wanting grid inter tied solar systems.  Many of these
> clients are not willing to go the extra mile to interface the solar system
> with the back up gen.  I am wondering if any of you out there have found
> simple fail safe solutions for preventing generator back feed when relays
> and switch gear are difficult or impossible to implement.
>
>  I have been thinking perhaps a large enough diode on the gen output could
> do it, but then what happens to the grid tied inverter when there is no
> where for the power to go?
>
> I know this is vague, but I am searching the hive to see if there is a
> better way to make these customers happy and make the sale.
>
> Thanks
> Daniel
>
>
> Daniel Tittmann
> CTO
> Greenwired
> www.greenwired.com
> daniel at greenwired.com
> 707-923-2001 (office)
> 707-206-5088 (Cell)
>
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