[RE-wrenches] Inverter ratings exceeding 25kw fir battery backup

Tue Feb 18 09:42:02 PST 2025

Haha, we would not have the pool heater on a backup system, but many times
people want a partial home backup system with whole home annual grid
offset.

But for practical purposes around here, full-time residents often just
trade pool heating for air conditioning based on season. If you size a
backup system for central air conditioning, sometimes it is technically
possible to heat the pool off-grid in the winter because the house load is
otherwise a fraction of what it is in the summer months. In the winter, we
sometimes see batteries full by 9:00 am and a lot of wasted solar energy.

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 Tue, Feb 18, 2025 at 11:56 AM Dave Angelini Offgrid Solar via
RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:

> Sure I get how important it is to electrically heat a pool in a power outage. 😉
>
> *Dave An,gelini Offgrid Solar
> "we go where powerlines don't"
>    <http://members.sti.net/offgridsolar/>https://offgridsolar1.com/ <https://offgridsolar1.com/>  <http://members.sti.net/offgridsolar/>
> e-mail  offgridsolar at sti.net <offgridsolar at sti.net>
> text 209 813 0060*
>
>
> On 2025-02-18 8:05 am, Jason Szumlanski via RE-wrenches wrote:
>
> There are many 4,000 sq ft pool homes in my area with electric pool
> heating and electric everything else where 25kW would just cover the
> electric bill. Some larger homes around here can definitely require more.
> Florida Power & Light allows up to 50kW on 120/240V split phase service,
> but only if expected production does not exceed an estimated 115% of
> historical annual usage.
>
>
> 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 Mon, Feb 17, 2025 at 12:58 PM Dave Angelini Offgrid Solar via
> RE-wrenches <re-wrenches at lists.re-wrenches.org> wrote:
>
> Why is there a need for more than 25KW for residential please? Just
> curious. In Nevada, 25KW is way into commercial.
>
>
>
> *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/>
> e-mail  offgridsolar at sti.net <offgridsolar at sti.net>
> text 209 813 0060*
>
>
> On 2025-02-17 9:43 am, Tyrone Houck via RE-wrenches wrote:
>
> Greetings wrenches,
> In Pacific Power territory we are coming up against roadblocks with
> regards to whole house battery backup systems with inverter ratings higher
> than 25kw. Even when the generation capacity is below the 25kw residential
> limit, net metering applications are being rejected based on the inverter
> rating.. The inverter rating in these cases is sized to handle the
> customer's existing loads and will never export more than the 25kw limit
> dictated by Oregon PUC.  I am drafting a letter to Energy Trust, the state,
> etc. But am curious if anyone else gas had this problem or come up with a
> solution. I would appreciate to hear any experiences or similar
> interactions with PGE or PPL or even how this has worked in other
> jurisdictions, states, etc. Any input or support is greatly appreciated.
>
> Tyrone Houck
> Oregon Solarworks LLC
> CCB #204937 LRT #076
> 541-787-1366
> tyrone at oregonsolarworks.com
>
>
>
>
> _______________________________________________
> 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
>
> _______________________________________________
> 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
>
>
> _______________________________________________
> 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
>
> _______________________________________________
> 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/20250218/db5b690b/attachment.htm>