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:[email protected]]
*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
<[email protected]> 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:[email protected]
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/[email protected]/
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
_______________________________________________
List sponsored by Redwood Alliance
Pay optional member dues here: http://re-wrenches.org
List Address: [email protected]
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/[email protected]/
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
