[RE-wrenches] NEM3 inverter quest

[August Goers]

Hi William -

I know you're not a fan of Tesla, you so you might want to check out
FranklinWH (which is basically like a supercharged Powerwall 2 system):

https://www.franklinwh.com/products/apower2-home-battery-backup/

or Enphase:
https://enphase.com/store/storage/gen3/iq-battery-5p?srsltid=AfmBOoojCQ36cLiuTk7Egp47myyWpz834SsfiKw3fA_hp3B2__lhSbc0

Enphase would require you to have microinverters for your PV whereas
Franklin should be able to AC-couple to your existing PV inverter. Enphase
is releasing their IQ Meter Collar adapter in the coming months:
https://enphase.com/download/iq-meter-collar-data-sheet?srsltid=AfmBOopomsOkyikV7VatWtysBPHBp4UqW-uh_jSaZJx7HQxP0KgZwLGo

This meter collar product is a total game changer - Tesla has had a meter
collar adapter for the last year or more and it has probably reduced our
labor by about half to provide whole-home backup. I understand that
FranklinWh expects to have a meter collar coming in Q2 of this year.

Best,

August




On Tue, Feb 18, 2025 at 12:03 PM William Miller via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Friends:
>
>
>
> Now that I am on NEM3 I need to consider a battery system to capture
> daytime energy production and use it to self-power at night.  I am new to
> this concept so I apologize for newbie questions.
>
>
>
> It will not be easy for me to install a critical-loads sub-panel and I am
> not looking for outage protection.  Therefore I think my only AC connection
> to the inverter would be to the input.
>
>
>
> My shop has a 100 amp feeder and 8 Kw of PV on it.  (There is 2.5 Kw of PV
> on the house).  The shop would be an ideal place to put an inverter and
> battery bank.
>
>
>
> ·        I would like to charge batteries exclusively from solar and only
> feed excess PV production back to the grid.
>
> ·        I would like to sell from batteries into my home distribution
> but only to meet the use on my premises.  I assume CTs on the utility
> feeder would regulate this sell rate.
>
>
>
> Is there an inverter that will do this?  I have not found the proper
> search terms to give me usable answers.  I’ve been reading manuals from
> many different manufacturers but manuals seem to have become very vague as
> of late.
>
>
>
> Thanks in advance.
>
>
>
> William Miller
>
>
>
> Miller Solar
>
> 17395 Oak Road, Atascadero, CA 93422
>
> 805-438-5600
>
> www.millersolar.com
>
> CA Lic. 773985
>
>
>
>
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