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>> <https://twitter.com/SolarEnergySols>
>> <https://www.linkedin.com/company/sesre>
>>
>>
>>
>> *From:* RE-wrenches *On
>> Behalf Of *Kirk Herander, VSE
>> *Sent:* Friday, April 16, 2021
half
> of Kirk Herander, VSE
> *Sent:* Friday, April 16, 2021 9:13 AM
> *To:* re-wrenches@lists.re-wrenches.org >
> *Subject:* [RE-wrenches] Powerwall 2 AC PV regulation
>
> Hello all,
> I am adding more PV to an orphaned Powerwall 2 AC system (which is all new
> to
_
From: RE-wrenches on behalf of Kirk
Herander, VSE
Sent: Friday, April 16, 2021 9:13 AM
To: re-wrenches@lists.re-wrenches.org
Subject: [RE-wrenches] Powerwall 2 AC PV regulation
Hello all,
I am adding more PV to an orphaned Powerwall 2 AC system (which is all new to
me), -3- PW's stacke
Wrenches
This customer with an orphan PW, not to compromise the factory warranty on
the batteries, it would be safest to just grid tie any additional PV and
not touch the existing system from the gateway down.
Jerry
NABCEP PV Inspector
On Fri, Apr 16, 2021, 8:38 AM Kirk Herander, VSE
wrote:
>
Hello, I hope this helps. I have very little PW experience, the one i was
involved in had a 1741 transfer switch with grid monitoring on the mains.
When the grid failed the switch would disconnect from the Grid and connect
the PW to the panel or sub-panel. The PW charges from the AC source when
The manuals I have say 7.6kW(AC) per PW2
Glenn
From: RE-wrenches On Behalf Of
Jason Szumlanski
Sent: Friday, April 16, 2021 9:46 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Powerwall 2 AC PV regulation
I think the limit is now stated as 7.6kw if memory serves me right.
Jason
nergySols>
> <https://www.linkedin.com/company/sesre>
>
>
>
> *From:* RE-wrenches *On
> Behalf Of *Kirk Herander, VSE
> *Sent:* Friday, April 16, 2021 11:13 AM
> *To:* re-wrenches@lists.re-wrenches.org
> *Subject:* [RE-wrenches] Powerwall 2 AC PV regulation
>
>
Hi Kirk, the maximum actual charge rate is 5kW per Powerwall. When you
exceed that, or start getting full batteries, the Gateway tells the
Powerwalls to frequency shift to 62-66 Hz.
This takes the UL 1741 listed inverters out of the sweet spot, and they
stop or curtail production. However,
Of Kirk
Herander, VSE
Sent: Friday, April 16, 2021 11:13 AM
To: re-wrenches@lists.re-wrenches.org
Subject: [RE-wrenches] Powerwall 2 AC PV regulation
Hello all,
I am adding more PV to an orphaned Powerwall 2 AC system (which is all new to
me), -3- PW's stacked to total about 40kwh of usable storage
Hello all,
I am adding more PV to an orphaned Powerwall 2 AC system (which is all new to
me), -3- PW's stacked to total about 40kwh of usable storage. it presently has
about 13kw of PV, though -2- SMA inverters, feeding into it through a common
subpanel between the PW gateway and the main
The Powerwall 2 is only AC coupleable to a PV system.-GlennSent from my
'smart'phone, so please excuse typos and spelling errors.-- Original
message--From: Dave Angelini Offgrid SolarDate: Sun, Jan 10, 2021 12:57
PMTo: RE-wrenches;Cc: Subject:[RE-wrenches] PowerwallHello Wrenches !
The
Hi Dave,
Yes, your understanding is correct. No access to DC terminals. Definitely
not a great off-grid solution and is complicated and clunky at best to
integrate a gen.
Best,
Chris
On Sun, Jan 10, 2021 at 12:57 PM Dave Angelini Offgrid Solar <
offgridso...@sti.net> wrote:
> Hello Wrenches !
Hello Wrenches !
The last time I looked the Tesla Powerwall that is
current, could not be easily made to work with existing 48v charge
controllers?
In other words it is AC coupled and can't be easily DC
coupled?
Dave Angelini Offgrid Solar
"we go where powerlines
don't"
The things people spend money on and the reasons are so varied that dollar
analysis is just part of the decision.
It can be almost priceless to stay in your home after the utility goes off
during a wildfire. Keeping the smoke out, the cool air inside, and not
having to go to a shelter or motel
Hi Hilton,
We've done the math for our installed cost on the Powerwall 2. Certainly,
it wouldn't make sense to purchase it just for energy savings alone with
current California residential electricity tariffs. However, most folks are
buying it primarily for backup purposes and then a little bit
Has anyone calculated a lifetime cost per stored and delivered kWh for any of
these lithium battery systems?
From the rough numbers I’ve come up with in the past it seems like daily
cycling to avoid grid use would be a dead loss. The capital cost vs capacity
and cycle life doesn’t add up.
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