[RE-wrenches] EG4 Mini Split

[William Miller]

There are two reasons I could see:



·        Your existing PV rating is too small.

·        You do not have any existing PV and you do not want to incur more
utility expenses.



I do see a real limitation to direct-DC air conditioning (which I think is
what we are discussing):  No AC when the sun is not high in the sky.  That
alone makes this impractical



William



Miller Solar

17395 Oak Road, Atascadero, CA 93422

805-438-5600

www.millersolar.com

CA Lic. 773985





*From:* RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] *On
Behalf Of *Jason Szumlanski via RE-wrenches
*Sent:* Thursday, June 19, 2025 10:25 AM
*To:* RE-wrenches
*Cc:* Jason Szumlanski
*Subject:* Re: [RE-wrenches] EG4 Mini Split



I guess the secondary question is why would anyone use this system anyway
in a grid interconnected environment. The only rationale I could see is to
have some level of air conditioning when the sun is shining without having
to go through the expense of adding a hybrid inverter and batteries. But by
the time you install solar panels with a rapid shutdown system, the return
on that investment seems terrible considering that much of the solar energy
generated will be wasted unless you somehow need maximum cooling from this
unit 365 days a year during the daylight hours.








Jason Szumlanski

Principal Solar Designer | Florida Solar Design Group
NABCEP Certified Solar Professional (PVIP)
Florida State Certified Solar Contractor CVC56956

Florida Certified Electrical Contractor EC13013208



On Thu, Jun 19, 2025, 6:15 AM Jason Szumlanski <
jason at floridasolardesigngroup.com> wrote:

I'm getting requests to install 4-6 panels for these mini-splits. I'm
saying no so far, but it got me thinking... What are people doing for rapid
shutdown for these systems? I can't see them being exempt. The manual is
silent on the issue. It just shows a DC isolator from the panels to the
point of connection in the unit.



Jason Szumlanski

Florida Solar Design Group
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