[RE-wrenches] EG4 Mini Split

[Carl Hansen]

There are a few of these EG4 solar hybrid units in my area, all 
installed by homeowners on Off Grid homes,  they have to be connected to 
the homes AC system so that when the sun isn't shining they will run 
just as well off 120vac. I'm assuming when the sun is shining the 
outdoor and indoor unit are powered by the solar modules, they don't run 
without the 120vac connected.  They also will heat the home in the 
winter but not as well as they cool.

  Carl Hansen

  Hansen&Sun Electric

  505 470-0770

On 2025-06-19 11:53 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 <http://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
>
>
>
> _______________________________________________
> List sponsored by Redwood Alliance
>
> Pay optional member dues here:http://re-wrenches.org
>
> List Address:RE-wrenches at lists.re-wrenches.org
>
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>
> There are two list archives for searching. When one doesn't work, try the other:
> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>
> List rules & etiquette:
> http://www.re-wrenches.org/etiquette.htm
>
> Check out or update participant bios:
> http://www.members.re-wrenches.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20250619/c0884f64/attachment.htm>