[RE-wrenches] Head scratcher

Matt Sherald matt at getpimby.com
Tue Oct 18 11:05:28 PDT 2022

Hi Kris,

I think you want the "shore power" to feed into a 240V load center on the
tiny home.  You might have to add this panel as part of the power inlet
equipment.  I'd feed the minisplit off this 240V panel and subfeed 120V to
the AC IN on the inverter.  In turn, the inverter can supply a load center
with 120V ONLY circuits.


On Tue, Oct 18, 2022 at 1:30 PM Kristopher Schmid via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Hi All,
> I am hoping that someone on the list can help me think this one through.
> I have a client that builds tiny portable homes.  He is working on one
> where his client supplied the solar modules, charge controller, batteries,
> inverter, etc.  They bought them through some dot com.  The tiny home has a
> 240 volt mini split that they want to use when plugged into the grid.  The
> inverter that they bought is a 120 volt.  The inverter is not grid tied,
> but does have a 120 volt grid input for battery charging / pass thru.
> So, my issue is, how can I make this work?  I am thinking of using a 50
> amp automatic transfer switch like a Surge-Guard-40100 and connecting the
> solar inverter as primary and grid as backup but am not sure if that unit
> will disconnect the grid with only one leg energized.   Physical space for
> components is very limited
> If anyone has some ideas here, I would sure appreciate it.
> (other than "just walk away" or buy a 240 volt inverter)
> Thanks,
> Kris
> Shine On!
> Kris Schmid
> Legacy Solar, LLC
> 137 West 1st Avenue
> Luck, WI 54853
> www.legacysolar.com
> 715-653-4295
> NABCEP Certified PV Installation Professional
> Licensed Wisconsin Master Electrician
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Matt Sherald
NABCEP Certified Solar PV Installer®

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