[RE-wrenches] Will IQ8 microinverters backfeed a generator during grid interruptions

[Mac Lewis]

Hello Scot,

What type of generator?

Generac has a load shed module that can shed a load remotely by "knowing"
when the generator is providing voltage.  Small dip switches can be set to
completely lock out the load when running on generator voltage.  Generac
Smart management module is the product name.  There are also another
product from PSP called the  SAK-60 that supposedly can do this with any
generator type (no direct experience with this).





On Wed, Jan 21, 2026 at 3:01 PM Dave Angelini Offgrid Solar via RE-wrenches
<re-wrenches at lists.re-wrenches.org> wrote:

> And in this case, with all the Ice storm doom and gloom coming, to alot of
> the country, inform your users how to turn off their array and run a
> generator safely!
>
> Offgrid is just so much easier sometimes.
>
>  😉
>
> *Dave Angelini Offgrid Solar
> "we go where powerlines don't"
>    <http://members.sti.net/offgridsolar/>https://offgridsolar1.com/ <https://offgridsolar1.com/>  <http://members.sti.net/offgridsolar/>
> e-mail  offgridsolar at sti.net <offgridsolar at sti.net>
> text 209 813 0060*
>
>
> On 2026-01-21 12:55 pm, Zeke Yewdall via RE-wrenches wrote:
>
> In that case, we're getting way off track and way more complicated :P
>
> Just put a contactor between the PV array and the POI using the NC
> contacts, with the coil powered off the generator.  Then the PV array can
> never backfeed the generator because it'll be turned off anytime the
> generator is running.
>
> Zeke
>
> ------------------
>
>
> Thanks but I'm just trying to grid-tie a small Enphase array without ESS
> where the point of interconnection is on the customer side of the
> generator/ATS.
>
> Trying to use existing wires in place to simplify and lower costs...but
> the generator is my constraint because I need the PoI to be on line side of
> the ATS.
>
> Howard "Scot" Arey
> Owner, Solar CenTex
> 254-300-1228
>
>
>
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-- 



Mac Lewis

*"Yo solo sé que no sé nada." -Sócrates*
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