[RE-wrenches] EG4 Mini Split

[Jason Szumlanski]

I can see the redundancy reason. There does not seem to be an economic
reason to do this, especially if you are on-grid or already have a suitably
sized off-grid or backup system. Just use a regular mini-split seems more
logical.


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 at 2:35 PM Dave Angelini Offgrid Solar via RE-wrenches
<re-wrenches at lists.re-wrenches.org> wrote:

> The EG4 is not a bad split. Reason my client wanted it was a redundant
> cooling back-up if his battery/inverter/solar went down.
> Definitely run AC to it from the main system. Getting close to the
> solstice and solar can power this well into the evening😎
>
>
>
> *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/>
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>
>
> On 2025-06-19 10:53 am, William Miller via RE-wrenches wrote:
>
> 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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